/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/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 04:36:45,128 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 04:36:45,129 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 04:36:45,146 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 04:36:45,153 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-19 04:36:45,156 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-19 04:36:45,157 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-19 04:36:45,159 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-19 04:36:45,159 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-19 04:36:45,161 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-19 04:36:45,164 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-19 04:36:45,169 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-19 04:36:45,171 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-19 04:36:45,171 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-19 04:36:45,172 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-19 04:36:45,172 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-19 04:36:45,173 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-19 04:36:45,178 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-19 04:36:45,184 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 04:36:45,184 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 04:36:45,185 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 04:36:45,186 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-19 04:36:45,191 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 04:36:45,191 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 04:36:45,192 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 04:36:45,192 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 04:36:45,192 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 04:36:45,192 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 04:36:45,192 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 04:36:45,192 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 04:36:45,192 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 04:36:45,192 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 04:36:45,193 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 04:36:45,193 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 04:36:45,193 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 04:36:45,193 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 04:36:45,193 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 04:36:45,193 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 04:36:45,193 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 04:36:45,193 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 04:36:45,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 04:36:45,193 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 04:36:45,193 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 04:36:45,194 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 04:36:45,194 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 04:36:45,194 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 04:36:45,194 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-19 04:36:45,194 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 04:36:45,373 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 04:36:45,391 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 04:36:45,393 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 04:36:45,393 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 04:36:45,394 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 04:36:45,395 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound20.c [2022-03-19 04:36:45,439 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1961a8706/8911591a8db14fc1851545e11fa0c701/FLAGdc0b15522 [2022-03-19 04:36:45,815 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 04:36:45,815 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound20.c [2022-03-19 04:36:45,821 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1961a8706/8911591a8db14fc1851545e11fa0c701/FLAGdc0b15522 [2022-03-19 04:36:45,833 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1961a8706/8911591a8db14fc1851545e11fa0c701 [2022-03-19 04:36:45,834 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 04:36:45,836 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 04:36:45,838 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 04:36:45,838 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 04:36:45,841 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 04:36:45,841 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 04:36:45" (1/1) ... [2022-03-19 04:36:45,842 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55223eaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:36:45, skipping insertion in model container [2022-03-19 04:36:45,842 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 04:36:45" (1/1) ... [2022-03-19 04:36:45,847 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 04:36:45,860 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 04:36:45,976 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound20.c[490,503] [2022-03-19 04:36:45,989 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 04:36:45,993 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 04:36:46,002 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound20.c[490,503] [2022-03-19 04:36:46,009 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 04:36:46,016 INFO L208 MainTranslator]: Completed translation [2022-03-19 04:36:46,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:36:46 WrapperNode [2022-03-19 04:36:46,017 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 04:36:46,017 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 04:36:46,017 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 04:36:46,017 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 04:36:46,024 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:36:46" (1/1) ... [2022-03-19 04:36:46,024 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:36:46" (1/1) ... [2022-03-19 04:36:46,028 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:36:46" (1/1) ... [2022-03-19 04:36:46,028 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:36:46" (1/1) ... [2022-03-19 04:36:46,032 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:36:46" (1/1) ... [2022-03-19 04:36:46,038 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:36:46" (1/1) ... [2022-03-19 04:36:46,039 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:36:46" (1/1) ... [2022-03-19 04:36:46,040 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 04:36:46,041 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 04:36:46,041 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 04:36:46,041 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 04:36:46,041 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:36:46" (1/1) ... [2022-03-19 04:36:46,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 04:36:46,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:36:46,066 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-19 04:36:46,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-19 04:36:46,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 04:36:46,087 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 04:36:46,087 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 04:36:46,087 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 04:36:46,087 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 04:36:46,088 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 04:36:46,088 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 04:36:46,088 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 04:36:46,088 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 04:36:46,088 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 04:36:46,088 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 04:36:46,088 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 04:36:46,088 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 04:36:46,088 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 04:36:46,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 04:36:46,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 04:36:46,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 04:36:46,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 04:36:46,088 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 04:36:46,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 04:36:46,128 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 04:36:46,129 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 04:36:46,330 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 04:36:46,335 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 04:36:46,335 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-19 04:36:46,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 04:36:46 BoogieIcfgContainer [2022-03-19 04:36:46,354 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 04:36:46,356 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 04:36:46,356 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 04:36:46,358 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 04:36:46,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 04:36:45" (1/3) ... [2022-03-19 04:36:46,358 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ef01440 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 04:36:46, skipping insertion in model container [2022-03-19 04:36:46,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:36:46" (2/3) ... [2022-03-19 04:36:46,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ef01440 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 04:36:46, skipping insertion in model container [2022-03-19 04:36:46,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 04:36:46" (3/3) ... [2022-03-19 04:36:46,359 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound20.c [2022-03-19 04:36:46,362 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 04:36:46,363 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 04:36:46,411 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 04:36:46,415 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-19 04:36:46,415 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 04:36:46,428 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-19 04:36:46,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-19 04:36:46,441 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:36:46,442 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:36:46,442 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:36:46,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:36:46,446 INFO L85 PathProgramCache]: Analyzing trace with hash -587582002, now seen corresponding path program 1 times [2022-03-19 04:36:46,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:36:46,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [217736559] [2022-03-19 04:36:46,461 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:36:46,461 INFO L85 PathProgramCache]: Analyzing trace with hash -587582002, now seen corresponding path program 2 times [2022-03-19 04:36:46,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:36:46,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458192002] [2022-03-19 04:36:46,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:36:46,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:36:46,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 04:36:46,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 04:36:46,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 04:36:46,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 04:36:46,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 04:36:46,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 04:36:46,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 04:36:46,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 04:36:46,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 04:36:46,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-19 04:36:46,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 04:36:46,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-19 04:36:46,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 04:36:46,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-19 04:36:46,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 04:36:46,595 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-19 04:36:46,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:36:46,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458192002] [2022-03-19 04:36:46,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458192002] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:36:46,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:36:46,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 04:36:46,598 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:36:46,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [217736559] [2022-03-19 04:36:46,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [217736559] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:36:46,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:36:46,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 04:36:46,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8995650] [2022-03-19 04:36:46,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:36:46,602 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 04:36:46,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:36:46,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 04:36:46,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 04:36:46,619 INFO L87 Difference]: Start difference. First operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 04:36:46,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:36:46,693 INFO L93 Difference]: Finished difference Result 73 states and 118 transitions. [2022-03-19 04:36:46,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 04:36:46,695 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2022-03-19 04:36:46,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:36:46,699 INFO L225 Difference]: With dead ends: 73 [2022-03-19 04:36:46,699 INFO L226 Difference]: Without dead ends: 35 [2022-03-19 04:36:46,702 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 04:36:46,706 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:36:46,707 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 42 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:36:46,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-19 04:36:46,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-19 04:36:46,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 04:36:46,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2022-03-19 04:36:46,740 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2022-03-19 04:36:46,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:36:46,741 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2022-03-19 04:36:46,741 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 04:36:46,741 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2022-03-19 04:36:46,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-19 04:36:46,742 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:36:46,742 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:36:46,742 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 04:36:46,743 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:36:46,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:36:46,743 INFO L85 PathProgramCache]: Analyzing trace with hash 987777007, now seen corresponding path program 1 times [2022-03-19 04:36:46,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:36:46,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1558349488] [2022-03-19 04:36:46,744 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:36:46,744 INFO L85 PathProgramCache]: Analyzing trace with hash 987777007, now seen corresponding path program 2 times [2022-03-19 04:36:46,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:36:46,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273048126] [2022-03-19 04:36:46,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:36:46,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:36:46,759 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:36:46,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [311255571] [2022-03-19 04:36:46,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:36:46,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:36:46,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:36:46,761 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:36:46,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 04:36:46,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:36:46,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:36:46,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 04:36:46,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:36:46,927 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-19 04:36:46,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:36:47,052 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-19 04:36:47,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:36:47,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273048126] [2022-03-19 04:36:47,053 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:36:47,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311255571] [2022-03-19 04:36:47,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311255571] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:36:47,054 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:36:47,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-03-19 04:36:47,055 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:36:47,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1558349488] [2022-03-19 04:36:47,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1558349488] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:36:47,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:36:47,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 04:36:47,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89945531] [2022-03-19 04:36:47,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:36:47,056 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 04:36:47,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:36:47,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 04:36:47,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-19 04:36:47,058 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 04:36:47,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:36:47,177 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2022-03-19 04:36:47,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 04:36:47,178 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2022-03-19 04:36:47,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:36:47,179 INFO L225 Difference]: With dead ends: 52 [2022-03-19 04:36:47,179 INFO L226 Difference]: Without dead ends: 44 [2022-03-19 04:36:47,180 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-19 04:36:47,180 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 19 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:36:47,181 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 154 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:36:47,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-19 04:36:47,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-03-19 04:36:47,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 04:36:47,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2022-03-19 04:36:47,199 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 44 [2022-03-19 04:36:47,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:36:47,199 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2022-03-19 04:36:47,199 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 04:36:47,200 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2022-03-19 04:36:47,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-19 04:36:47,200 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:36:47,201 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:36:47,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 04:36:47,419 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:36:47,421 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:36:47,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:36:47,422 INFO L85 PathProgramCache]: Analyzing trace with hash 561616070, now seen corresponding path program 1 times [2022-03-19 04:36:47,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:36:47,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1746858964] [2022-03-19 04:36:47,423 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:36:47,423 INFO L85 PathProgramCache]: Analyzing trace with hash 561616070, now seen corresponding path program 2 times [2022-03-19 04:36:47,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:36:47,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635418453] [2022-03-19 04:36:47,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:36:47,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:36:47,437 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:36:47,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1660049744] [2022-03-19 04:36:47,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:36:47,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:36:47,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:36:47,444 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:36:47,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 04:36:47,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-19 04:36:47,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:36:47,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-19 04:36:47,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:36:47,571 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-19 04:36:47,571 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 04:36:47,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:36:47,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635418453] [2022-03-19 04:36:47,573 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:36:47,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660049744] [2022-03-19 04:36:47,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660049744] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:36:47,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:36:47,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 04:36:47,574 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:36:47,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1746858964] [2022-03-19 04:36:47,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1746858964] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:36:47,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:36:47,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 04:36:47,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407381387] [2022-03-19 04:36:47,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:36:47,575 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 04:36:47,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:36:47,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 04:36:47,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 04:36:47,576 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-19 04:36:47,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:36:47,626 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2022-03-19 04:36:47,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 04:36:47,626 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 45 [2022-03-19 04:36:47,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:36:47,627 INFO L225 Difference]: With dead ends: 50 [2022-03-19 04:36:47,627 INFO L226 Difference]: Without dead ends: 48 [2022-03-19 04:36:47,628 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 04:36:47,629 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 6 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:36:47,629 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 163 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:36:47,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-19 04:36:47,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2022-03-19 04:36:47,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 04:36:47,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2022-03-19 04:36:47,636 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 45 [2022-03-19 04:36:47,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:36:47,637 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2022-03-19 04:36:47,637 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-19 04:36:47,637 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2022-03-19 04:36:47,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-19 04:36:47,638 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:36:47,638 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:36:47,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 04:36:47,857 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-19 04:36:47,857 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:36:47,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:36:47,858 INFO L85 PathProgramCache]: Analyzing trace with hash -680064098, now seen corresponding path program 1 times [2022-03-19 04:36:47,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:36:47,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1313811755] [2022-03-19 04:36:47,859 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:36:47,859 INFO L85 PathProgramCache]: Analyzing trace with hash -680064098, now seen corresponding path program 2 times [2022-03-19 04:36:47,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:36:47,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849639451] [2022-03-19 04:36:47,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:36:47,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:36:47,876 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:36:47,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [631903772] [2022-03-19 04:36:47,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:36:47,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:36:47,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:36:47,883 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:36:47,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 04:36:47,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:36:47,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:36:47,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 04:36:47,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:36:48,042 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-19 04:36:48,042 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 04:36:48,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:36:48,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849639451] [2022-03-19 04:36:48,042 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:36:48,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631903772] [2022-03-19 04:36:48,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631903772] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:36:48,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:36:48,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 04:36:48,043 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:36:48,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1313811755] [2022-03-19 04:36:48,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1313811755] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:36:48,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:36:48,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 04:36:48,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835435711] [2022-03-19 04:36:48,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:36:48,044 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 04:36:48,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:36:48,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 04:36:48,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 04:36:48,045 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-19 04:36:48,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:36:48,072 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2022-03-19 04:36:48,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 04:36:48,072 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 50 [2022-03-19 04:36:48,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:36:48,074 INFO L225 Difference]: With dead ends: 58 [2022-03-19 04:36:48,074 INFO L226 Difference]: Without dead ends: 56 [2022-03-19 04:36:48,075 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 04:36:48,075 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 7 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:36:48,075 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 173 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:36:48,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-19 04:36:48,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-03-19 04:36:48,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 32 states have internal predecessors, (33), 20 states have call successors, (20), 6 states have call predecessors, (20), 5 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-19 04:36:48,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 71 transitions. [2022-03-19 04:36:48,088 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 71 transitions. Word has length 50 [2022-03-19 04:36:48,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:36:48,088 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 71 transitions. [2022-03-19 04:36:48,088 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-19 04:36:48,088 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 71 transitions. [2022-03-19 04:36:48,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-19 04:36:48,089 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:36:48,089 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:36:48,123 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-19 04:36:48,324 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:36:48,326 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:36:48,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:36:48,327 INFO L85 PathProgramCache]: Analyzing trace with hash 606548870, now seen corresponding path program 1 times [2022-03-19 04:36:48,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:36:48,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1681250986] [2022-03-19 04:36:48,327 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:36:48,327 INFO L85 PathProgramCache]: Analyzing trace with hash 606548870, now seen corresponding path program 2 times [2022-03-19 04:36:48,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:36:48,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265319406] [2022-03-19 04:36:48,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:36:48,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:36:48,345 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:36:48,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1518181582] [2022-03-19 04:36:48,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:36:48,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:36:48,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:36:48,349 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:36:48,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 04:36:48,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:36:48,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:36:48,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 04:36:48,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:36:48,524 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-19 04:36:48,525 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 04:36:48,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:36:48,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265319406] [2022-03-19 04:36:48,526 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:36:48,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518181582] [2022-03-19 04:36:48,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518181582] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:36:48,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:36:48,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 04:36:48,527 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:36:48,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1681250986] [2022-03-19 04:36:48,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1681250986] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:36:48,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:36:48,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 04:36:48,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109360356] [2022-03-19 04:36:48,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:36:48,528 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 04:36:48,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:36:48,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 04:36:48,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 04:36:48,529 INFO L87 Difference]: Start difference. First operand 55 states and 71 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-19 04:36:48,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:36:48,574 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2022-03-19 04:36:48,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 04:36:48,575 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 55 [2022-03-19 04:36:48,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:36:48,577 INFO L225 Difference]: With dead ends: 62 [2022-03-19 04:36:48,577 INFO L226 Difference]: Without dead ends: 60 [2022-03-19 04:36:48,578 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 04:36:48,581 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 7 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:36:48,581 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 163 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:36:48,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-19 04:36:48,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-03-19 04:36:48,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 32 states have (on average 1.125) internal successors, (36), 35 states have internal predecessors, (36), 20 states have call successors, (20), 7 states have call predecessors, (20), 6 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-19 04:36:48,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2022-03-19 04:36:48,599 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 55 [2022-03-19 04:36:48,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:36:48,599 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2022-03-19 04:36:48,599 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-19 04:36:48,599 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2022-03-19 04:36:48,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-19 04:36:48,603 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:36:48,603 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:36:48,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 04:36:48,812 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:36:48,812 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:36:48,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:36:48,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1584976990, now seen corresponding path program 1 times [2022-03-19 04:36:48,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:36:48,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1472207021] [2022-03-19 04:36:48,813 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:36:48,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1584976990, now seen corresponding path program 2 times [2022-03-19 04:36:48,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:36:48,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443435289] [2022-03-19 04:36:48,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:36:48,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:36:48,823 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:36:48,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [49532578] [2022-03-19 04:36:48,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:36:48,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:36:48,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:36:48,825 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:36:48,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 04:36:48,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:36:48,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:36:48,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-19 04:36:48,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:36:49,037 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-03-19 04:36:49,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:36:49,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:36:49,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443435289] [2022-03-19 04:36:49,112 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:36:49,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49532578] [2022-03-19 04:36:49,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49532578] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 04:36:49,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 04:36:49,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-03-19 04:36:49,113 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:36:49,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1472207021] [2022-03-19 04:36:49,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1472207021] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:36:49,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:36:49,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 04:36:49,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044974374] [2022-03-19 04:36:49,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:36:49,113 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 04:36:49,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:36:49,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 04:36:49,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-19 04:36:49,114 INFO L87 Difference]: Start difference. First operand 59 states and 74 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-03-19 04:36:49,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:36:49,212 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2022-03-19 04:36:49,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 04:36:49,213 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 60 [2022-03-19 04:36:49,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:36:49,217 INFO L225 Difference]: With dead ends: 66 [2022-03-19 04:36:49,218 INFO L226 Difference]: Without dead ends: 64 [2022-03-19 04:36:49,218 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-19 04:36:49,218 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 11 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:36:49,218 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 181 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:36:49,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-19 04:36:49,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-03-19 04:36:49,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 38 states have internal predecessors, (39), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-19 04:36:49,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2022-03-19 04:36:49,225 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 60 [2022-03-19 04:36:49,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:36:49,226 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2022-03-19 04:36:49,226 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-03-19 04:36:49,226 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2022-03-19 04:36:49,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-19 04:36:49,226 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:36:49,227 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:36:49,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 04:36:49,427 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:36:49,427 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:36:49,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:36:49,428 INFO L85 PathProgramCache]: Analyzing trace with hash -669670075, now seen corresponding path program 1 times [2022-03-19 04:36:49,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:36:49,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [438044576] [2022-03-19 04:36:49,428 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:36:49,428 INFO L85 PathProgramCache]: Analyzing trace with hash -669670075, now seen corresponding path program 2 times [2022-03-19 04:36:49,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:36:49,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676621313] [2022-03-19 04:36:49,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:36:49,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:36:49,437 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:36:49,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1388870098] [2022-03-19 04:36:49,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:36:49,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:36:49,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:36:49,443 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:36:49,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 04:36:49,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:36:49,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:36:49,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 04:36:49,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:36:49,605 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-19 04:36:49,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:36:49,730 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-03-19 04:36:49,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:36:49,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676621313] [2022-03-19 04:36:49,730 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:36:49,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388870098] [2022-03-19 04:36:49,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388870098] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-19 04:36:49,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 04:36:49,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-19 04:36:49,731 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:36:49,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [438044576] [2022-03-19 04:36:49,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [438044576] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:36:49,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:36:49,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 04:36:49,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375303186] [2022-03-19 04:36:49,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:36:49,731 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 04:36:49,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:36:49,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 04:36:49,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-19 04:36:49,732 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-03-19 04:36:49,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:36:49,764 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2022-03-19 04:36:49,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 04:36:49,764 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 67 [2022-03-19 04:36:49,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:36:49,765 INFO L225 Difference]: With dead ends: 69 [2022-03-19 04:36:49,765 INFO L226 Difference]: Without dead ends: 67 [2022-03-19 04:36:49,765 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 126 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-19 04:36:49,766 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:36:49,766 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 146 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:36:49,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-19 04:36:49,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2022-03-19 04:36:49,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.121212121212121) internal successors, (37), 34 states have internal predecessors, (37), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-19 04:36:49,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2022-03-19 04:36:49,780 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 67 [2022-03-19 04:36:49,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:36:49,780 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2022-03-19 04:36:49,780 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-03-19 04:36:49,780 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2022-03-19 04:36:49,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-19 04:36:49,781 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:36:49,781 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:36:49,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 04:36:49,995 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:36:49,995 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:36:49,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:36:49,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1682830289, now seen corresponding path program 1 times [2022-03-19 04:36:49,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:36:49,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [583264917] [2022-03-19 04:36:49,996 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:36:49,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1682830289, now seen corresponding path program 2 times [2022-03-19 04:36:49,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:36:49,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953470223] [2022-03-19 04:36:49,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:36:49,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:36:50,007 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:36:50,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [817623659] [2022-03-19 04:36:50,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:36:50,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:36:50,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:36:50,011 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:36:50,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 04:36:50,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:36:50,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:36:50,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 04:36:50,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:36:50,149 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-03-19 04:36:50,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:36:50,263 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-03-19 04:36:50,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:36:50,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953470223] [2022-03-19 04:36:50,264 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:36:50,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817623659] [2022-03-19 04:36:50,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817623659] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:36:50,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:36:50,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-19 04:36:50,264 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:36:50,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [583264917] [2022-03-19 04:36:50,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [583264917] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:36:50,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:36:50,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 04:36:50,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161710405] [2022-03-19 04:36:50,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:36:50,265 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 04:36:50,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:36:50,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 04:36:50,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-19 04:36:50,265 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-19 04:36:50,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:36:50,378 INFO L93 Difference]: Finished difference Result 106 states and 146 transitions. [2022-03-19 04:36:50,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 04:36:50,378 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2022-03-19 04:36:50,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:36:50,379 INFO L225 Difference]: With dead ends: 106 [2022-03-19 04:36:50,379 INFO L226 Difference]: Without dead ends: 98 [2022-03-19 04:36:50,379 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-19 04:36:50,380 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 30 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:36:50,380 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 333 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:36:50,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-19 04:36:50,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2022-03-19 04:36:50,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 48 states have internal predecessors, (56), 34 states have call successors, (34), 8 states have call predecessors, (34), 7 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-19 04:36:50,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 122 transitions. [2022-03-19 04:36:50,392 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 122 transitions. Word has length 69 [2022-03-19 04:36:50,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:36:50,392 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 122 transitions. [2022-03-19 04:36:50,392 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-19 04:36:50,393 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 122 transitions. [2022-03-19 04:36:50,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-19 04:36:50,393 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:36:50,393 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:36:50,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-19 04:36:50,607 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:36:50,608 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:36:50,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:36:50,608 INFO L85 PathProgramCache]: Analyzing trace with hash 376741854, now seen corresponding path program 1 times [2022-03-19 04:36:50,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:36:50,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [643613657] [2022-03-19 04:36:50,609 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:36:50,609 INFO L85 PathProgramCache]: Analyzing trace with hash 376741854, now seen corresponding path program 2 times [2022-03-19 04:36:50,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:36:50,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538296630] [2022-03-19 04:36:50,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:36:50,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:36:50,624 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:36:50,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [643661355] [2022-03-19 04:36:50,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:36:50,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:36:50,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:36:50,628 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:36:50,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 04:36:50,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:36:50,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:36:50,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-19 04:36:50,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:36:50,818 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-19 04:36:50,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:36:50,971 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-19 04:36:50,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:36:50,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538296630] [2022-03-19 04:36:50,971 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:36:50,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643661355] [2022-03-19 04:36:50,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643661355] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:36:50,972 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:36:50,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2022-03-19 04:36:50,972 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:36:50,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [643613657] [2022-03-19 04:36:50,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [643613657] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:36:50,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:36:50,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 04:36:50,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368540898] [2022-03-19 04:36:50,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:36:50,972 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 04:36:50,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:36:50,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 04:36:50,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-03-19 04:36:50,973 INFO L87 Difference]: Start difference. First operand 89 states and 122 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-19 04:36:51,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:36:51,112 INFO L93 Difference]: Finished difference Result 124 states and 173 transitions. [2022-03-19 04:36:51,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 04:36:51,112 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 75 [2022-03-19 04:36:51,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:36:51,113 INFO L225 Difference]: With dead ends: 124 [2022-03-19 04:36:51,113 INFO L226 Difference]: Without dead ends: 121 [2022-03-19 04:36:51,114 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-03-19 04:36:51,114 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 21 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:36:51,114 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 290 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:36:51,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-03-19 04:36:51,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2022-03-19 04:36:51,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 64 states have internal predecessors, (75), 47 states have call successors, (47), 9 states have call predecessors, (47), 8 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-03-19 04:36:51,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 166 transitions. [2022-03-19 04:36:51,130 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 166 transitions. Word has length 75 [2022-03-19 04:36:51,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:36:51,130 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 166 transitions. [2022-03-19 04:36:51,130 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-19 04:36:51,130 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 166 transitions. [2022-03-19 04:36:51,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-19 04:36:51,131 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:36:51,131 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:36:51,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-19 04:36:51,347 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-19 04:36:51,347 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:36:51,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:36:51,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1245952186, now seen corresponding path program 3 times [2022-03-19 04:36:51,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:36:51,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [985806440] [2022-03-19 04:36:51,348 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:36:51,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1245952186, now seen corresponding path program 4 times [2022-03-19 04:36:51,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:36:51,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546390144] [2022-03-19 04:36:51,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:36:51,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:36:51,356 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:36:51,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [88867341] [2022-03-19 04:36:51,356 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:36:51,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:36:51,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:36:51,363 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:36:51,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 04:36:51,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:36:51,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:36:51,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-19 04:36:51,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:36:51,812 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-03-19 04:36:51,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:36:52,061 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-03-19 04:36:52,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:36:52,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546390144] [2022-03-19 04:36:52,062 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:36:52,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88867341] [2022-03-19 04:36:52,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88867341] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:36:52,062 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:36:52,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2022-03-19 04:36:52,062 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:36:52,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [985806440] [2022-03-19 04:36:52,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [985806440] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:36:52,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:36:52,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 04:36:52,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276550736] [2022-03-19 04:36:52,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:36:52,063 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 04:36:52,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:36:52,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 04:36:52,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-03-19 04:36:52,063 INFO L87 Difference]: Start difference. First operand 118 states and 166 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-19 04:36:52,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:36:52,264 INFO L93 Difference]: Finished difference Result 130 states and 176 transitions. [2022-03-19 04:36:52,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 04:36:52,267 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 80 [2022-03-19 04:36:52,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:36:52,268 INFO L225 Difference]: With dead ends: 130 [2022-03-19 04:36:52,268 INFO L226 Difference]: Without dead ends: 128 [2022-03-19 04:36:52,269 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-03-19 04:36:52,269 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 30 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:36:52,269 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 296 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:36:52,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-19 04:36:52,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2022-03-19 04:36:52,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 68 states have (on average 1.1911764705882353) internal successors, (81), 70 states have internal predecessors, (81), 47 states have call successors, (47), 11 states have call predecessors, (47), 10 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-03-19 04:36:52,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 172 transitions. [2022-03-19 04:36:52,283 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 172 transitions. Word has length 80 [2022-03-19 04:36:52,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:36:52,283 INFO L478 AbstractCegarLoop]: Abstraction has 126 states and 172 transitions. [2022-03-19 04:36:52,283 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-19 04:36:52,283 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 172 transitions. [2022-03-19 04:36:52,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-19 04:36:52,284 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:36:52,284 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:36:52,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-19 04:36:52,500 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-19 04:36:52,500 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:36:52,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:36:52,500 INFO L85 PathProgramCache]: Analyzing trace with hash 901388446, now seen corresponding path program 5 times [2022-03-19 04:36:52,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:36:52,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [133523722] [2022-03-19 04:36:52,501 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:36:52,501 INFO L85 PathProgramCache]: Analyzing trace with hash 901388446, now seen corresponding path program 6 times [2022-03-19 04:36:52,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:36:52,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310381686] [2022-03-19 04:36:52,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:36:52,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:36:52,508 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:36:52,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1694767807] [2022-03-19 04:36:52,508 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:36:52,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:36:52,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:36:52,509 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:36:52,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-19 04:36:52,556 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 04:36:52,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:36:52,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-19 04:36:52,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:36:53,011 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-03-19 04:36:53,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:36:53,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:36:53,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310381686] [2022-03-19 04:36:53,122 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:36:53,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694767807] [2022-03-19 04:36:53,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694767807] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 04:36:53,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 04:36:53,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-19 04:36:53,122 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:36:53,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [133523722] [2022-03-19 04:36:53,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [133523722] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:36:53,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:36:53,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 04:36:53,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485967642] [2022-03-19 04:36:53,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:36:53,123 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 04:36:53,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:36:53,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 04:36:53,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-03-19 04:36:53,123 INFO L87 Difference]: Start difference. First operand 126 states and 172 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-19 04:36:53,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:36:53,348 INFO L93 Difference]: Finished difference Result 134 states and 179 transitions. [2022-03-19 04:36:53,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 04:36:53,349 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 85 [2022-03-19 04:36:53,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:36:53,350 INFO L225 Difference]: With dead ends: 134 [2022-03-19 04:36:53,350 INFO L226 Difference]: Without dead ends: 132 [2022-03-19 04:36:53,350 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-03-19 04:36:53,351 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 24 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 04:36:53,351 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 299 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 04:36:53,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-03-19 04:36:53,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2022-03-19 04:36:53,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 71 states have (on average 1.1830985915492958) internal successors, (84), 73 states have internal predecessors, (84), 47 states have call successors, (47), 12 states have call predecessors, (47), 11 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-03-19 04:36:53,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 175 transitions. [2022-03-19 04:36:53,365 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 175 transitions. Word has length 85 [2022-03-19 04:36:53,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:36:53,365 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 175 transitions. [2022-03-19 04:36:53,365 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-19 04:36:53,365 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 175 transitions. [2022-03-19 04:36:53,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-19 04:36:53,366 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:36:53,366 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:36:53,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-19 04:36:53,579 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-19 04:36:53,579 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:36:53,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:36:53,580 INFO L85 PathProgramCache]: Analyzing trace with hash -686534738, now seen corresponding path program 1 times [2022-03-19 04:36:53,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:36:53,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [85690989] [2022-03-19 04:36:53,580 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:36:53,580 INFO L85 PathProgramCache]: Analyzing trace with hash -686534738, now seen corresponding path program 2 times [2022-03-19 04:36:53,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:36:53,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704280409] [2022-03-19 04:36:53,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:36:53,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:36:53,587 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:36:53,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1715123412] [2022-03-19 04:36:53,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:36:53,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:36:53,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:36:53,591 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:36:53,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-19 04:36:53,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:36:53,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:36:53,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-19 04:36:53,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:36:53,999 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-03-19 04:36:53,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:36:54,282 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-03-19 04:36:54,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:36:54,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704280409] [2022-03-19 04:36:54,282 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:36:54,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715123412] [2022-03-19 04:36:54,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715123412] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:36:54,282 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:36:54,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-03-19 04:36:54,283 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:36:54,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [85690989] [2022-03-19 04:36:54,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [85690989] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:36:54,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:36:54,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 04:36:54,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390547772] [2022-03-19 04:36:54,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:36:54,283 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 04:36:54,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:36:54,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 04:36:54,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-03-19 04:36:54,284 INFO L87 Difference]: Start difference. First operand 130 states and 175 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-19 04:36:54,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:36:54,494 INFO L93 Difference]: Finished difference Result 157 states and 211 transitions. [2022-03-19 04:36:54,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 04:36:54,495 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 91 [2022-03-19 04:36:54,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:36:54,496 INFO L225 Difference]: With dead ends: 157 [2022-03-19 04:36:54,496 INFO L226 Difference]: Without dead ends: 154 [2022-03-19 04:36:54,496 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-03-19 04:36:54,497 INFO L912 BasicCegarLoop]: 57 mSDtfsCounter, 19 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:36:54,497 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 378 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:36:54,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-03-19 04:36:54,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2022-03-19 04:36:54,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 84 states have (on average 1.1785714285714286) internal successors, (99), 86 states have internal predecessors, (99), 55 states have call successors, (55), 14 states have call predecessors, (55), 13 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-03-19 04:36:54,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 206 transitions. [2022-03-19 04:36:54,517 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 206 transitions. Word has length 91 [2022-03-19 04:36:54,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:36:54,517 INFO L478 AbstractCegarLoop]: Abstraction has 153 states and 206 transitions. [2022-03-19 04:36:54,517 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-19 04:36:54,517 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 206 transitions. [2022-03-19 04:36:54,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-03-19 04:36:54,518 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:36:54,518 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:36:54,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-19 04:36:54,731 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-19 04:36:54,732 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:36:54,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:36:54,732 INFO L85 PathProgramCache]: Analyzing trace with hash -663071842, now seen corresponding path program 7 times [2022-03-19 04:36:54,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:36:54,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [21567685] [2022-03-19 04:36:54,732 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:36:54,733 INFO L85 PathProgramCache]: Analyzing trace with hash -663071842, now seen corresponding path program 8 times [2022-03-19 04:36:54,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:36:54,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384431881] [2022-03-19 04:36:54,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:36:54,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:36:54,744 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:36:54,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [855634307] [2022-03-19 04:36:54,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:36:54,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:36:54,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:36:54,745 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:36:54,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-19 04:36:54,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:36:54,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:36:54,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-19 04:36:54,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:36:54,895 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2022-03-19 04:36:54,896 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 04:36:54,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:36:54,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384431881] [2022-03-19 04:36:54,896 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:36:54,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855634307] [2022-03-19 04:36:54,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855634307] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:36:54,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:36:54,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 04:36:54,897 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:36:54,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [21567685] [2022-03-19 04:36:54,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [21567685] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:36:54,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:36:54,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 04:36:54,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671378112] [2022-03-19 04:36:54,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:36:54,897 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 04:36:54,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:36:54,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 04:36:54,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 04:36:54,898 INFO L87 Difference]: Start difference. First operand 153 states and 206 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-03-19 04:36:54,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:36:54,952 INFO L93 Difference]: Finished difference Result 201 states and 280 transitions. [2022-03-19 04:36:54,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 04:36:54,952 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 100 [2022-03-19 04:36:54,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:36:54,953 INFO L225 Difference]: With dead ends: 201 [2022-03-19 04:36:54,953 INFO L226 Difference]: Without dead ends: 156 [2022-03-19 04:36:54,954 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-19 04:36:54,954 INFO L912 BasicCegarLoop]: 58 mSDtfsCounter, 6 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:36:54,955 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 188 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:36:54,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-03-19 04:36:54,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 147. [2022-03-19 04:36:54,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 78 states have (on average 1.1282051282051282) internal successors, (88), 80 states have internal predecessors, (88), 55 states have call successors, (55), 14 states have call predecessors, (55), 13 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-03-19 04:36:54,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 195 transitions. [2022-03-19 04:36:54,970 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 195 transitions. Word has length 100 [2022-03-19 04:36:54,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:36:54,971 INFO L478 AbstractCegarLoop]: Abstraction has 147 states and 195 transitions. [2022-03-19 04:36:54,971 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-03-19 04:36:54,971 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 195 transitions. [2022-03-19 04:36:54,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-19 04:36:54,971 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:36:54,972 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:36:54,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-19 04:36:55,188 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-19 04:36:55,188 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:36:55,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:36:55,188 INFO L85 PathProgramCache]: Analyzing trace with hash -428114403, now seen corresponding path program 1 times [2022-03-19 04:36:55,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:36:55,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1513864452] [2022-03-19 04:36:55,189 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:36:55,189 INFO L85 PathProgramCache]: Analyzing trace with hash -428114403, now seen corresponding path program 2 times [2022-03-19 04:36:55,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:36:55,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242959994] [2022-03-19 04:36:55,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:36:55,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:36:55,196 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:36:55,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1349004182] [2022-03-19 04:36:55,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:36:55,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:36:55,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:36:55,198 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:36:55,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-19 04:36:55,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:36:55,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:36:55,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 66 conjunts are in the unsatisfiable core [2022-03-19 04:36:55,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:36:56,189 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 87 proven. 52 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-03-19 04:36:56,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:37:13,228 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 81 proven. 43 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-03-19 04:37:13,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:37:13,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242959994] [2022-03-19 04:37:13,229 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:37:13,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349004182] [2022-03-19 04:37:13,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349004182] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:37:13,229 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:37:13,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2022-03-19 04:37:13,229 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:37:13,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1513864452] [2022-03-19 04:37:13,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1513864452] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:37:13,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:37:13,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 04:37:13,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260944542] [2022-03-19 04:37:13,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:37:13,230 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 04:37:13,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:37:13,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 04:37:13,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=474, Unknown=1, NotChecked=0, Total=600 [2022-03-19 04:37:13,231 INFO L87 Difference]: Start difference. First operand 147 states and 195 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-19 04:37:18,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:37:18,315 INFO L93 Difference]: Finished difference Result 154 states and 201 transitions. [2022-03-19 04:37:18,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 04:37:18,316 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) Word has length 107 [2022-03-19 04:37:18,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:37:18,317 INFO L225 Difference]: With dead ends: 154 [2022-03-19 04:37:18,317 INFO L226 Difference]: Without dead ends: 152 [2022-03-19 04:37:18,317 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 188 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=158, Invalid=653, Unknown=1, NotChecked=0, Total=812 [2022-03-19 04:37:18,318 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 34 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:37:18,318 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 396 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-19 04:37:18,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-03-19 04:37:18,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 128. [2022-03-19 04:37:18,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 68 states have (on average 1.1323529411764706) internal successors, (77), 70 states have internal predecessors, (77), 47 states have call successors, (47), 13 states have call predecessors, (47), 12 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-03-19 04:37:18,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 168 transitions. [2022-03-19 04:37:18,335 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 168 transitions. Word has length 107 [2022-03-19 04:37:18,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:37:18,336 INFO L478 AbstractCegarLoop]: Abstraction has 128 states and 168 transitions. [2022-03-19 04:37:18,336 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-19 04:37:18,336 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 168 transitions. [2022-03-19 04:37:18,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-19 04:37:18,337 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:37:18,337 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:37:18,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-19 04:37:18,555 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-19 04:37:18,555 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:37:18,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:37:18,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1185765869, now seen corresponding path program 3 times [2022-03-19 04:37:18,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:37:18,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1463565679] [2022-03-19 04:37:18,556 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:37:18,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1185765869, now seen corresponding path program 4 times [2022-03-19 04:37:18,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:37:18,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069143697] [2022-03-19 04:37:18,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:37:18,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:37:18,563 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:37:18,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1634157375] [2022-03-19 04:37:18,563 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:37:18,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:37:18,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:37:18,564 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:37:18,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-19 04:37:18,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:37:18,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:37:18,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-19 04:37:18,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:37:19,268 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 70 proven. 34 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-19 04:37:19,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:37:21,592 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 70 proven. 34 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-19 04:37:21,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:37:21,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069143697] [2022-03-19 04:37:21,592 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:37:21,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634157375] [2022-03-19 04:37:21,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634157375] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:37:21,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:37:21,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 24 [2022-03-19 04:37:21,593 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:37:21,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1463565679] [2022-03-19 04:37:21,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1463565679] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:37:21,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:37:21,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 04:37:21,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529250630] [2022-03-19 04:37:21,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:37:21,594 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 04:37:21,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:37:21,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 04:37:21,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2022-03-19 04:37:21,594 INFO L87 Difference]: Start difference. First operand 128 states and 168 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-19 04:37:22,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:37:22,502 INFO L93 Difference]: Finished difference Result 162 states and 215 transitions. [2022-03-19 04:37:22,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 04:37:22,507 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 113 [2022-03-19 04:37:22,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:37:22,508 INFO L225 Difference]: With dead ends: 162 [2022-03-19 04:37:22,508 INFO L226 Difference]: Without dead ends: 159 [2022-03-19 04:37:22,509 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 201 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=149, Invalid=607, Unknown=0, NotChecked=0, Total=756 [2022-03-19 04:37:22,509 INFO L912 BasicCegarLoop]: 51 mSDtfsCounter, 27 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 04:37:22,509 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 549 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 04:37:22,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-03-19 04:37:22,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 157. [2022-03-19 04:37:22,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 83 states have (on average 1.1325301204819278) internal successors, (94), 85 states have internal predecessors, (94), 59 states have call successors, (59), 15 states have call predecessors, (59), 14 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2022-03-19 04:37:22,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 209 transitions. [2022-03-19 04:37:22,526 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 209 transitions. Word has length 113 [2022-03-19 04:37:22,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:37:22,527 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 209 transitions. [2022-03-19 04:37:22,527 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-19 04:37:22,527 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 209 transitions. [2022-03-19 04:37:22,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-19 04:37:22,528 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:37:22,528 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:37:22,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-19 04:37:22,744 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:37:22,744 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:37:22,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:37:22,744 INFO L85 PathProgramCache]: Analyzing trace with hash 884638574, now seen corresponding path program 5 times [2022-03-19 04:37:22,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:37:22,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1656866242] [2022-03-19 04:37:22,745 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:37:22,745 INFO L85 PathProgramCache]: Analyzing trace with hash 884638574, now seen corresponding path program 6 times [2022-03-19 04:37:22,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:37:22,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407505659] [2022-03-19 04:37:22,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:37:22,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:37:22,752 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:37:22,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1754374401] [2022-03-19 04:37:22,752 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:37:22,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:37:22,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:37:22,753 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:37:22,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-19 04:37:22,799 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 04:37:22,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:37:22,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 04:37:22,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:37:22,944 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-03-19 04:37:22,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:37:23,081 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-03-19 04:37:23,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:37:23,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407505659] [2022-03-19 04:37:23,081 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:37:23,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754374401] [2022-03-19 04:37:23,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754374401] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:37:23,081 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:37:23,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2022-03-19 04:37:23,082 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:37:23,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1656866242] [2022-03-19 04:37:23,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1656866242] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:37:23,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:37:23,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 04:37:23,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591139072] [2022-03-19 04:37:23,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:37:23,082 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 04:37:23,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:37:23,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 04:37:23,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-19 04:37:23,083 INFO L87 Difference]: Start difference. First operand 157 states and 209 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-03-19 04:37:23,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:37:23,239 INFO L93 Difference]: Finished difference Result 211 states and 298 transitions. [2022-03-19 04:37:23,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 04:37:23,240 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 116 [2022-03-19 04:37:23,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:37:23,241 INFO L225 Difference]: With dead ends: 211 [2022-03-19 04:37:23,241 INFO L226 Difference]: Without dead ends: 203 [2022-03-19 04:37:23,242 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 227 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-03-19 04:37:23,242 INFO L912 BasicCegarLoop]: 85 mSDtfsCounter, 14 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:37:23,242 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 359 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:37:23,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-03-19 04:37:23,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 184. [2022-03-19 04:37:23,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 94 states have (on average 1.1595744680851063) internal successors, (109), 96 states have internal predecessors, (109), 75 states have call successors, (75), 15 states have call predecessors, (75), 14 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2022-03-19 04:37:23,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 256 transitions. [2022-03-19 04:37:23,264 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 256 transitions. Word has length 116 [2022-03-19 04:37:23,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:37:23,264 INFO L478 AbstractCegarLoop]: Abstraction has 184 states and 256 transitions. [2022-03-19 04:37:23,264 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-03-19 04:37:23,264 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 256 transitions. [2022-03-19 04:37:23,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-03-19 04:37:23,265 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:37:23,265 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:37:23,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-19 04:37:23,471 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-19 04:37:23,471 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:37:23,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:37:23,472 INFO L85 PathProgramCache]: Analyzing trace with hash -743412771, now seen corresponding path program 3 times [2022-03-19 04:37:23,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:37:23,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1099355216] [2022-03-19 04:37:23,472 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:37:23,472 INFO L85 PathProgramCache]: Analyzing trace with hash -743412771, now seen corresponding path program 4 times [2022-03-19 04:37:23,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:37:23,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524599355] [2022-03-19 04:37:23,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:37:23,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:37:23,479 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:37:23,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [608992092] [2022-03-19 04:37:23,480 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:37:23,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:37:23,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:37:23,481 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:37:23,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-19 04:37:23,522 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:37:23,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:37:23,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-19 04:37:23,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:37:23,673 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 73 proven. 7 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2022-03-19 04:37:23,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:37:23,855 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 73 proven. 7 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2022-03-19 04:37:23,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:37:23,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524599355] [2022-03-19 04:37:23,856 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:37:23,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608992092] [2022-03-19 04:37:23,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608992092] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:37:23,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:37:23,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-19 04:37:23,856 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:37:23,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1099355216] [2022-03-19 04:37:23,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1099355216] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:37:23,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:37:23,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 04:37:23,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283364118] [2022-03-19 04:37:23,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:37:23,857 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 04:37:23,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:37:23,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 04:37:23,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-19 04:37:23,857 INFO L87 Difference]: Start difference. First operand 184 states and 256 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-03-19 04:37:24,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:37:24,047 INFO L93 Difference]: Finished difference Result 198 states and 267 transitions. [2022-03-19 04:37:24,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 04:37:24,047 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 122 [2022-03-19 04:37:24,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:37:24,048 INFO L225 Difference]: With dead ends: 198 [2022-03-19 04:37:24,048 INFO L226 Difference]: Without dead ends: 195 [2022-03-19 04:37:24,048 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 235 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-19 04:37:24,049 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 17 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:37:24,049 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 182 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:37:24,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-03-19 04:37:24,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2022-03-19 04:37:24,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 103 states have (on average 1.145631067961165) internal successors, (118), 104 states have internal predecessors, (118), 73 states have call successors, (73), 18 states have call predecessors, (73), 17 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) [2022-03-19 04:37:24,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 262 transitions. [2022-03-19 04:37:24,074 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 262 transitions. Word has length 122 [2022-03-19 04:37:24,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:37:24,074 INFO L478 AbstractCegarLoop]: Abstraction has 194 states and 262 transitions. [2022-03-19 04:37:24,074 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-03-19 04:37:24,074 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 262 transitions. [2022-03-19 04:37:24,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-19 04:37:24,076 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:37:24,076 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:37:24,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-19 04:37:24,291 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-19 04:37:24,291 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:37:24,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:37:24,292 INFO L85 PathProgramCache]: Analyzing trace with hash 541794983, now seen corresponding path program 5 times [2022-03-19 04:37:24,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:37:24,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1801150417] [2022-03-19 04:37:24,292 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:37:24,292 INFO L85 PathProgramCache]: Analyzing trace with hash 541794983, now seen corresponding path program 6 times [2022-03-19 04:37:24,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:37:24,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912106150] [2022-03-19 04:37:24,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:37:24,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:37:24,300 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:37:24,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [15369369] [2022-03-19 04:37:24,301 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:37:24,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:37:24,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:37:24,304 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:37:24,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-19 04:37:24,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 04:37:24,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:37:24,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 82 conjunts are in the unsatisfiable core [2022-03-19 04:37:24,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:37:25,050 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 99 proven. 86 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2022-03-19 04:37:25,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:37:25,573 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 130 proven. 29 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-03-19 04:37:25,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:37:25,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912106150] [2022-03-19 04:37:25,573 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:37:25,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15369369] [2022-03-19 04:37:25,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15369369] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:37:25,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:37:25,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 22 [2022-03-19 04:37:25,574 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:37:25,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1801150417] [2022-03-19 04:37:25,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1801150417] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:37:25,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:37:25,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 04:37:25,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515433524] [2022-03-19 04:37:25,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:37:25,575 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 04:37:25,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:37:25,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 04:37:25,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-03-19 04:37:25,575 INFO L87 Difference]: Start difference. First operand 194 states and 262 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 10 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 9 states have call predecessors, (21), 9 states have call successors, (21) [2022-03-19 04:37:26,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:37:26,095 INFO L93 Difference]: Finished difference Result 265 states and 355 transitions. [2022-03-19 04:37:26,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 04:37:26,095 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 10 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 9 states have call predecessors, (21), 9 states have call successors, (21) Word has length 127 [2022-03-19 04:37:26,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:37:26,097 INFO L225 Difference]: With dead ends: 265 [2022-03-19 04:37:26,097 INFO L226 Difference]: Without dead ends: 263 [2022-03-19 04:37:26,097 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 230 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2022-03-19 04:37:26,098 INFO L912 BasicCegarLoop]: 50 mSDtfsCounter, 32 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 04:37:26,098 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 582 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 04:37:26,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-03-19 04:37:26,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 260. [2022-03-19 04:37:26,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 139 states have (on average 1.1366906474820144) internal successors, (158), 140 states have internal predecessors, (158), 97 states have call successors, (97), 24 states have call predecessors, (97), 23 states have return successors, (95), 95 states have call predecessors, (95), 95 states have call successors, (95) [2022-03-19 04:37:26,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 350 transitions. [2022-03-19 04:37:26,130 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 350 transitions. Word has length 127 [2022-03-19 04:37:26,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:37:26,130 INFO L478 AbstractCegarLoop]: Abstraction has 260 states and 350 transitions. [2022-03-19 04:37:26,130 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 10 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 9 states have call predecessors, (21), 9 states have call successors, (21) [2022-03-19 04:37:26,130 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 350 transitions. [2022-03-19 04:37:26,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-03-19 04:37:26,131 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:37:26,131 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:37:26,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-19 04:37:26,344 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-19 04:37:26,345 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:37:26,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:37:26,345 INFO L85 PathProgramCache]: Analyzing trace with hash -2138166692, now seen corresponding path program 7 times [2022-03-19 04:37:26,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:37:26,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1117111366] [2022-03-19 04:37:26,346 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:37:26,346 INFO L85 PathProgramCache]: Analyzing trace with hash -2138166692, now seen corresponding path program 8 times [2022-03-19 04:37:26,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:37:26,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273466233] [2022-03-19 04:37:26,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:37:26,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:37:26,360 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:37:26,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1207287596] [2022-03-19 04:37:26,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:37:26,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:37:26,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:37:26,363 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:37:26,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-19 04:37:26,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:37:26,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:37:26,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-19 04:37:26,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:37:27,603 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 142 proven. 88 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2022-03-19 04:37:27,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:37:28,822 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:37:30,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:37:30,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273466233] [2022-03-19 04:37:30,010 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:37:30,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207287596] [2022-03-19 04:37:30,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207287596] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 04:37:30,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 04:37:30,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-19 04:37:30,011 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:37:30,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1117111366] [2022-03-19 04:37:30,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1117111366] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:37:30,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:37:30,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 04:37:30,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864831715] [2022-03-19 04:37:30,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:37:30,011 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 04:37:30,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:37:30,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 04:37:30,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2022-03-19 04:37:30,012 INFO L87 Difference]: Start difference. First operand 260 states and 350 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) [2022-03-19 04:37:34,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:37:34,371 INFO L93 Difference]: Finished difference Result 268 states and 357 transitions. [2022-03-19 04:37:34,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 04:37:34,371 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) Word has length 129 [2022-03-19 04:37:34,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:37:34,372 INFO L225 Difference]: With dead ends: 268 [2022-03-19 04:37:34,373 INFO L226 Difference]: Without dead ends: 266 [2022-03-19 04:37:34,373 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 141 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=159, Invalid=652, Unknown=1, NotChecked=0, Total=812 [2022-03-19 04:37:34,373 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 38 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-19 04:37:34,373 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 428 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-19 04:37:34,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-03-19 04:37:34,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 264. [2022-03-19 04:37:34,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 142 states have (on average 1.1338028169014085) internal successors, (161), 143 states have internal predecessors, (161), 97 states have call successors, (97), 25 states have call predecessors, (97), 24 states have return successors, (95), 95 states have call predecessors, (95), 95 states have call successors, (95) [2022-03-19 04:37:34,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 353 transitions. [2022-03-19 04:37:34,407 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 353 transitions. Word has length 129 [2022-03-19 04:37:34,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:37:34,407 INFO L478 AbstractCegarLoop]: Abstraction has 264 states and 353 transitions. [2022-03-19 04:37:34,407 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) [2022-03-19 04:37:34,407 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 353 transitions. [2022-03-19 04:37:34,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-03-19 04:37:34,408 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:37:34,408 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:37:34,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-19 04:37:34,624 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:37:34,625 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:37:34,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:37:34,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1899875875, now seen corresponding path program 9 times [2022-03-19 04:37:34,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:37:34,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [611985060] [2022-03-19 04:37:34,626 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:37:34,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1899875875, now seen corresponding path program 10 times [2022-03-19 04:37:34,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:37:34,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045264685] [2022-03-19 04:37:34,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:37:34,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:37:34,632 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:37:34,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1891380782] [2022-03-19 04:37:34,632 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:37:34,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:37:34,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:37:34,633 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:37:34,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-19 04:37:34,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:37:34,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:37:34,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-19 04:37:34,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:37:35,839 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 103 proven. 117 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-03-19 04:37:35,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:38:24,983 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 112 proven. 88 refuted. 2 times theorem prover too weak. 348 trivial. 0 not checked. [2022-03-19 04:38:24,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:38:24,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045264685] [2022-03-19 04:38:24,984 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:38:24,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891380782] [2022-03-19 04:38:24,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891380782] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:38:24,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:38:24,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 29 [2022-03-19 04:38:24,984 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:38:24,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [611985060] [2022-03-19 04:38:24,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [611985060] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:38:24,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:38:24,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 04:38:24,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961209222] [2022-03-19 04:38:24,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:38:24,985 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 04:38:24,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:38:24,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 04:38:24,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=629, Unknown=4, NotChecked=0, Total=812 [2022-03-19 04:38:24,986 INFO L87 Difference]: Start difference. First operand 264 states and 353 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2022-03-19 04:38:27,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:38:27,904 INFO L93 Difference]: Finished difference Result 281 states and 367 transitions. [2022-03-19 04:38:27,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 04:38:27,907 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) Word has length 132 [2022-03-19 04:38:27,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:38:27,908 INFO L225 Difference]: With dead ends: 281 [2022-03-19 04:38:27,908 INFO L226 Difference]: Without dead ends: 279 [2022-03-19 04:38:27,908 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 232 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 24.1s TimeCoverageRelationStatistics Valid=258, Invalid=928, Unknown=4, NotChecked=0, Total=1190 [2022-03-19 04:38:27,909 INFO L912 BasicCegarLoop]: 50 mSDtfsCounter, 30 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 04:38:27,909 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 467 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 04:38:27,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-03-19 04:38:27,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 243. [2022-03-19 04:38:27,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 133 states have (on average 1.1278195488721805) internal successors, (150), 134 states have internal predecessors, (150), 85 states have call successors, (85), 25 states have call predecessors, (85), 24 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2022-03-19 04:38:27,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 318 transitions. [2022-03-19 04:38:27,941 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 318 transitions. Word has length 132 [2022-03-19 04:38:27,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:38:27,942 INFO L478 AbstractCegarLoop]: Abstraction has 243 states and 318 transitions. [2022-03-19 04:38:27,942 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2022-03-19 04:38:27,942 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 318 transitions. [2022-03-19 04:38:27,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-19 04:38:27,943 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:38:27,943 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:38:27,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-19 04:38:28,161 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:38:28,161 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:38:28,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:38:28,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1068997356, now seen corresponding path program 7 times [2022-03-19 04:38:28,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:38:28,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [425815950] [2022-03-19 04:38:28,162 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:38:28,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1068997356, now seen corresponding path program 8 times [2022-03-19 04:38:28,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:38:28,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752352110] [2022-03-19 04:38:28,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:38:28,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:38:28,167 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:38:28,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [429971442] [2022-03-19 04:38:28,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:38:28,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:38:28,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:38:28,171 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:38:28,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-19 04:38:28,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:38:28,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:38:28,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-19 04:38:28,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:38:28,955 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 102 proven. 52 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2022-03-19 04:38:28,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:38:31,277 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 102 proven. 52 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2022-03-19 04:38:31,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:38:31,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752352110] [2022-03-19 04:38:31,278 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:38:31,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429971442] [2022-03-19 04:38:31,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429971442] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:38:31,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:38:31,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 26 [2022-03-19 04:38:31,278 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:38:31,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [425815950] [2022-03-19 04:38:31,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [425815950] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:38:31,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:38:31,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 04:38:31,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724537611] [2022-03-19 04:38:31,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:38:31,279 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 04:38:31,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:38:31,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 04:38:31,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2022-03-19 04:38:31,279 INFO L87 Difference]: Start difference. First operand 243 states and 318 transitions. Second operand has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2022-03-19 04:38:32,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:38:32,327 INFO L93 Difference]: Finished difference Result 288 states and 380 transitions. [2022-03-19 04:38:32,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 04:38:32,328 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) Word has length 135 [2022-03-19 04:38:32,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:38:32,329 INFO L225 Difference]: With dead ends: 288 [2022-03-19 04:38:32,329 INFO L226 Difference]: Without dead ends: 285 [2022-03-19 04:38:32,330 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 243 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2022-03-19 04:38:32,330 INFO L912 BasicCegarLoop]: 55 mSDtfsCounter, 30 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 04:38:32,330 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 607 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 04:38:32,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-03-19 04:38:32,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 282. [2022-03-19 04:38:32,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 153 states have (on average 1.130718954248366) internal successors, (173), 154 states have internal predecessors, (173), 101 states have call successors, (101), 28 states have call predecessors, (101), 27 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) [2022-03-19 04:38:32,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 373 transitions. [2022-03-19 04:38:32,379 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 373 transitions. Word has length 135 [2022-03-19 04:38:32,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:38:32,379 INFO L478 AbstractCegarLoop]: Abstraction has 282 states and 373 transitions. [2022-03-19 04:38:32,379 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2022-03-19 04:38:32,379 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 373 transitions. [2022-03-19 04:38:32,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-19 04:38:32,380 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:38:32,380 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:38:32,399 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-03-19 04:38:32,595 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-19 04:38:32,595 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:38:32,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:38:32,596 INFO L85 PathProgramCache]: Analyzing trace with hash -896647763, now seen corresponding path program 9 times [2022-03-19 04:38:32,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:38:32,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1257244448] [2022-03-19 04:38:32,596 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:38:32,596 INFO L85 PathProgramCache]: Analyzing trace with hash -896647763, now seen corresponding path program 10 times [2022-03-19 04:38:32,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:38:32,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794125225] [2022-03-19 04:38:32,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:38:32,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:38:32,602 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:38:32,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [247605899] [2022-03-19 04:38:32,602 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:38:32,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:38:32,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:38:32,608 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:38:32,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-19 04:38:32,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:38:32,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:38:32,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 87 conjunts are in the unsatisfiable core [2022-03-19 04:38:32,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:38:33,987 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:38:34,572 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:38:34,575 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:38:34,580 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:38:34,587 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:38:34,590 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:38:34,601 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:38:34,605 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:38:34,607 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:38:34,609 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:38:57,147 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 144 proven. 111 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-03-19 04:38:57,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:39:04,099 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 169 proven. 21 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2022-03-19 04:39:04,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:39:04,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794125225] [2022-03-19 04:39:04,099 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:39:04,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247605899] [2022-03-19 04:39:04,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247605899] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:39:04,099 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:39:04,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 15] total 33 [2022-03-19 04:39:04,100 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:39:04,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1257244448] [2022-03-19 04:39:04,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1257244448] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:39:04,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:39:04,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-19 04:39:04,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238505765] [2022-03-19 04:39:04,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:39:04,100 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-19 04:39:04,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:39:04,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-19 04:39:04,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=871, Unknown=0, NotChecked=0, Total=1056 [2022-03-19 04:39:04,101 INFO L87 Difference]: Start difference. First operand 282 states and 373 transitions. Second operand has 23 states, 20 states have (on average 1.8) internal successors, (36), 17 states have internal predecessors, (36), 10 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 11 states have call predecessors, (23), 9 states have call successors, (23) [2022-03-19 04:39:12,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:39:12,504 INFO L93 Difference]: Finished difference Result 331 states and 438 transitions. [2022-03-19 04:39:12,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-19 04:39:12,507 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 1.8) internal successors, (36), 17 states have internal predecessors, (36), 10 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 11 states have call predecessors, (23), 9 states have call successors, (23) Word has length 138 [2022-03-19 04:39:12,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:39:12,508 INFO L225 Difference]: With dead ends: 331 [2022-03-19 04:39:12,508 INFO L226 Difference]: Without dead ends: 328 [2022-03-19 04:39:12,509 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 243 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=294, Invalid=1428, Unknown=0, NotChecked=0, Total=1722 [2022-03-19 04:39:12,509 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 61 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 1050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-03-19 04:39:12,509 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 351 Invalid, 1050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 973 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2022-03-19 04:39:12,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-03-19 04:39:12,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 325. [2022-03-19 04:39:12,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 176 states have (on average 1.1306818181818181) internal successors, (199), 177 states have internal predecessors, (199), 117 states have call successors, (117), 32 states have call predecessors, (117), 31 states have return successors, (115), 115 states have call predecessors, (115), 115 states have call successors, (115) [2022-03-19 04:39:12,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 431 transitions. [2022-03-19 04:39:12,561 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 431 transitions. Word has length 138 [2022-03-19 04:39:12,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:39:12,561 INFO L478 AbstractCegarLoop]: Abstraction has 325 states and 431 transitions. [2022-03-19 04:39:12,561 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 1.8) internal successors, (36), 17 states have internal predecessors, (36), 10 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 11 states have call predecessors, (23), 9 states have call successors, (23) [2022-03-19 04:39:12,561 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 431 transitions. [2022-03-19 04:39:12,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-19 04:39:12,563 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:39:12,563 INFO L500 BasicCegarLoop]: trace histogram [19, 18, 18, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:39:12,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-19 04:39:12,775 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-19 04:39:12,775 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:39:12,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:39:12,776 INFO L85 PathProgramCache]: Analyzing trace with hash -604751514, now seen corresponding path program 11 times [2022-03-19 04:39:12,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:39:12,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1149114387] [2022-03-19 04:39:12,776 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:39:12,776 INFO L85 PathProgramCache]: Analyzing trace with hash -604751514, now seen corresponding path program 12 times [2022-03-19 04:39:12,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:39:12,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138904036] [2022-03-19 04:39:12,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:39:12,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:39:12,782 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:39:12,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1720907878] [2022-03-19 04:39:12,782 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:39:12,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:39:12,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:39:12,784 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:39:12,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-19 04:39:12,856 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 04:39:12,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:39:12,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-19 04:39:12,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:39:13,311 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 109 proven. 76 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2022-03-19 04:39:13,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:39:13,728 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 149 proven. 31 refuted. 0 times theorem prover too weak. 587 trivial. 0 not checked. [2022-03-19 04:39:13,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:39:13,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138904036] [2022-03-19 04:39:13,728 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:39:13,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720907878] [2022-03-19 04:39:13,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720907878] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:39:13,728 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:39:13,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 17 [2022-03-19 04:39:13,729 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:39:13,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1149114387] [2022-03-19 04:39:13,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1149114387] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:39:13,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:39:13,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 04:39:13,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150149535] [2022-03-19 04:39:13,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:39:13,729 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 04:39:13,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:39:13,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 04:39:13,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-03-19 04:39:13,730 INFO L87 Difference]: Start difference. First operand 325 states and 431 transitions. Second operand has 13 states, 12 states have (on average 2.75) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-19 04:39:14,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:39:14,253 INFO L93 Difference]: Finished difference Result 364 states and 481 transitions. [2022-03-19 04:39:14,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 04:39:14,253 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) Word has length 149 [2022-03-19 04:39:14,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:39:14,255 INFO L225 Difference]: With dead ends: 364 [2022-03-19 04:39:14,255 INFO L226 Difference]: Without dead ends: 362 [2022-03-19 04:39:14,256 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 279 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-03-19 04:39:14,256 INFO L912 BasicCegarLoop]: 54 mSDtfsCounter, 39 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 04:39:14,256 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 444 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 04:39:14,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-03-19 04:39:14,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 358. [2022-03-19 04:39:14,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 194 states have (on average 1.1288659793814433) internal successors, (219), 195 states have internal predecessors, (219), 129 states have call successors, (129), 35 states have call predecessors, (129), 34 states have return successors, (127), 127 states have call predecessors, (127), 127 states have call successors, (127) [2022-03-19 04:39:14,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 475 transitions. [2022-03-19 04:39:14,319 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 475 transitions. Word has length 149 [2022-03-19 04:39:14,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:39:14,320 INFO L478 AbstractCegarLoop]: Abstraction has 358 states and 475 transitions. [2022-03-19 04:39:14,320 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-19 04:39:14,320 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 475 transitions. [2022-03-19 04:39:14,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-03-19 04:39:14,321 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:39:14,321 INFO L500 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:39:14,339 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-03-19 04:39:14,538 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:39:14,539 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:39:14,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:39:14,539 INFO L85 PathProgramCache]: Analyzing trace with hash -162755237, now seen corresponding path program 13 times [2022-03-19 04:39:14,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:39:14,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1339348527] [2022-03-19 04:39:14,540 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:39:14,540 INFO L85 PathProgramCache]: Analyzing trace with hash -162755237, now seen corresponding path program 14 times [2022-03-19 04:39:14,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:39:14,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646271045] [2022-03-19 04:39:14,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:39:14,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:39:14,548 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:39:14,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [511159361] [2022-03-19 04:39:14,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:39:14,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:39:14,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:39:14,549 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:39:14,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-19 04:39:14,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:39:14,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:39:14,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 54 conjunts are in the unsatisfiable core [2022-03-19 04:39:14,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:39:15,347 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 131 proven. 109 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2022-03-19 04:39:15,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:39:16,388 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:39:16,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:39:16,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646271045] [2022-03-19 04:39:16,718 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:39:16,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511159361] [2022-03-19 04:39:16,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511159361] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 04:39:16,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 04:39:16,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-03-19 04:39:16,718 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:39:16,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1339348527] [2022-03-19 04:39:16,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1339348527] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:39:16,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:39:16,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 04:39:16,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300409292] [2022-03-19 04:39:16,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:39:16,719 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 04:39:16,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:39:16,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 04:39:16,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2022-03-19 04:39:16,719 INFO L87 Difference]: Start difference. First operand 358 states and 475 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 8 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 7 states have call successors, (26) [2022-03-19 04:39:17,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:39:17,543 INFO L93 Difference]: Finished difference Result 367 states and 483 transitions. [2022-03-19 04:39:17,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 04:39:17,544 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 8 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 7 states have call successors, (26) Word has length 151 [2022-03-19 04:39:17,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:39:17,545 INFO L225 Difference]: With dead ends: 367 [2022-03-19 04:39:17,545 INFO L226 Difference]: Without dead ends: 365 [2022-03-19 04:39:17,546 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-03-19 04:39:17,546 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 28 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 04:39:17,546 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 639 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 04:39:17,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-03-19 04:39:17,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 329. [2022-03-19 04:39:17,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 179 states have (on average 1.1284916201117319) internal successors, (202), 180 states have internal predecessors, (202), 117 states have call successors, (117), 33 states have call predecessors, (117), 32 states have return successors, (115), 115 states have call predecessors, (115), 115 states have call successors, (115) [2022-03-19 04:39:17,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 434 transitions. [2022-03-19 04:39:17,604 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 434 transitions. Word has length 151 [2022-03-19 04:39:17,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:39:17,605 INFO L478 AbstractCegarLoop]: Abstraction has 329 states and 434 transitions. [2022-03-19 04:39:17,605 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 8 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 7 states have call successors, (26) [2022-03-19 04:39:17,605 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 434 transitions. [2022-03-19 04:39:17,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-03-19 04:39:17,606 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:39:17,607 INFO L500 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:39:17,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-19 04:39:17,823 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:39:17,823 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:39:17,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:39:17,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1672449564, now seen corresponding path program 15 times [2022-03-19 04:39:17,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:39:17,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [376782726] [2022-03-19 04:39:17,824 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:39:17,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1672449564, now seen corresponding path program 16 times [2022-03-19 04:39:17,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:39:17,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298177996] [2022-03-19 04:39:17,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:39:17,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:39:17,830 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:39:17,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [357172139] [2022-03-19 04:39:17,830 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:39:17,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:39:17,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:39:17,831 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:39:17,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-19 04:39:17,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:39:17,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:39:17,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 111 conjunts are in the unsatisfiable core [2022-03-19 04:39:17,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:39:19,979 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 161 proven. 225 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2022-03-19 04:39:19,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:39:26,055 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:39:38,863 WARN L232 SmtUtils]: Spent 9.50s on a formula simplification. DAG size of input: 74 DAG size of output: 51 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 04:41:32,836 WARN L855 $PredicateComparison]: unable to prove that (forall ((v_main_~k~0_BEFORE_CALL_221 Int) (v_main_~yy~0_BEFORE_CALL_154 Int) (v_main_~s~0_BEFORE_CALL_349 Int) (v_main_~p~0_BEFORE_CALL_284 Int) (v_main_~q~0_BEFORE_CALL_346 Int) (v_main_~xy~0_BEFORE_CALL_182 Int) (v_main_~y~0_BEFORE_CALL_371 Int) (v_main_~x~0_BEFORE_CALL_363 Int) (v_main_~r~0_BEFORE_CALL_304 Int)) (let ((.cse7 (* v_main_~x~0_BEFORE_CALL_363 v_main_~q~0_BEFORE_CALL_346)) (.cse8 (* v_main_~y~0_BEFORE_CALL_371 v_main_~s~0_BEFORE_CALL_349)) (.cse9 (+ (* (- 1) v_main_~k~0_BEFORE_CALL_221 v_main_~q~0_BEFORE_CALL_346) v_main_~p~0_BEFORE_CALL_284)) (.cse10 (+ (* (- 1) (* v_main_~k~0_BEFORE_CALL_221 v_main_~s~0_BEFORE_CALL_349)) v_main_~r~0_BEFORE_CALL_304)) (.cse3 (* v_main_~p~0_BEFORE_CALL_284 v_main_~x~0_BEFORE_CALL_363)) (.cse4 (* v_main_~y~0_BEFORE_CALL_371 v_main_~r~0_BEFORE_CALL_304))) (let ((.cse6 (+ .cse3 .cse4)) (.cse0 (* .cse10 v_main_~y~0_BEFORE_CALL_371)) (.cse2 (* .cse9 v_main_~x~0_BEFORE_CALL_363)) (.cse5 (+ .cse7 .cse8))) (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (= (let ((.cse1 (div (+ .cse3 (* .cse0 (- 1)) (* (- 1) .cse2) .cse4) .cse5))) (+ .cse0 (* .cse1 v_main_~x~0_BEFORE_CALL_363 v_main_~q~0_BEFORE_CALL_346) (* .cse1 v_main_~y~0_BEFORE_CALL_371 v_main_~s~0_BEFORE_CALL_349) .cse2)) .cse6) (<= (+ .cse7 (* v_main_~k~0_BEFORE_CALL_221 v_main_~x~0_BEFORE_CALL_363 v_main_~q~0_BEFORE_CALL_346) .cse8 (* v_main_~k~0_BEFORE_CALL_221 v_main_~y~0_BEFORE_CALL_371 v_main_~s~0_BEFORE_CALL_349)) .cse6) (= (+ .cse0 .cse2 (* v_main_~y~0_BEFORE_CALL_371 (+ .cse0 .cse2))) (+ .cse0 (* .cse9 v_main_~xy~0_BEFORE_CALL_182) (* .cse10 v_main_~yy~0_BEFORE_CALL_154) .cse2)) (not (= (+ .cse7 (* v_main_~y~0_BEFORE_CALL_371 .cse5) .cse8) (+ .cse7 (* v_main_~xy~0_BEFORE_CALL_182 v_main_~q~0_BEFORE_CALL_346) .cse8 (* v_main_~s~0_BEFORE_CALL_349 v_main_~yy~0_BEFORE_CALL_154)))))))) is different from true [2022-03-19 04:42:09,217 WARN L855 $PredicateComparison]: unable to prove that (or (forall ((v_main_~k~0_BEFORE_CALL_221 Int) (v_main_~yy~0_BEFORE_CALL_154 Int) (v_main_~s~0_BEFORE_CALL_349 Int) (v_main_~p~0_BEFORE_CALL_284 Int) (v_main_~q~0_BEFORE_CALL_346 Int) (v_main_~xy~0_BEFORE_CALL_182 Int) (v_main_~y~0_BEFORE_CALL_371 Int) (v_main_~x~0_BEFORE_CALL_363 Int) (v_main_~r~0_BEFORE_CALL_304 Int)) (let ((.cse7 (* v_main_~x~0_BEFORE_CALL_363 v_main_~q~0_BEFORE_CALL_346)) (.cse8 (* v_main_~y~0_BEFORE_CALL_371 v_main_~s~0_BEFORE_CALL_349)) (.cse9 (+ (* (- 1) v_main_~k~0_BEFORE_CALL_221 v_main_~q~0_BEFORE_CALL_346) v_main_~p~0_BEFORE_CALL_284)) (.cse10 (+ (* (- 1) (* v_main_~k~0_BEFORE_CALL_221 v_main_~s~0_BEFORE_CALL_349)) v_main_~r~0_BEFORE_CALL_304)) (.cse3 (* v_main_~p~0_BEFORE_CALL_284 v_main_~x~0_BEFORE_CALL_363)) (.cse4 (* v_main_~y~0_BEFORE_CALL_371 v_main_~r~0_BEFORE_CALL_304))) (let ((.cse6 (+ .cse3 .cse4)) (.cse0 (* .cse10 v_main_~y~0_BEFORE_CALL_371)) (.cse2 (* .cse9 v_main_~x~0_BEFORE_CALL_363)) (.cse5 (+ .cse7 .cse8))) (or (= (let ((.cse1 (div (+ .cse3 (* .cse0 (- 1)) (* (- 1) .cse2) .cse4) .cse5))) (+ .cse0 (* .cse1 v_main_~x~0_BEFORE_CALL_363 v_main_~q~0_BEFORE_CALL_346) (* .cse1 v_main_~y~0_BEFORE_CALL_371 v_main_~s~0_BEFORE_CALL_349) .cse2)) .cse6) (<= (+ .cse7 (* v_main_~k~0_BEFORE_CALL_221 v_main_~x~0_BEFORE_CALL_363 v_main_~q~0_BEFORE_CALL_346) .cse8 (* v_main_~k~0_BEFORE_CALL_221 v_main_~y~0_BEFORE_CALL_371 v_main_~s~0_BEFORE_CALL_349)) .cse6) (= (+ .cse0 .cse2 (* v_main_~y~0_BEFORE_CALL_371 (+ .cse0 .cse2))) (+ .cse0 (* .cse9 v_main_~xy~0_BEFORE_CALL_182) (* .cse10 v_main_~yy~0_BEFORE_CALL_154) .cse2)) (not (= (+ .cse7 (* v_main_~y~0_BEFORE_CALL_371 .cse5) .cse8) (+ .cse7 (* v_main_~xy~0_BEFORE_CALL_182 v_main_~q~0_BEFORE_CALL_346) .cse8 (* v_main_~s~0_BEFORE_CALL_349 v_main_~yy~0_BEFORE_CALL_154)))))))) (not (= |c___VERIFIER_assert_#in~cond| 1))) is different from true [2022-03-19 04:42:45,610 WARN L855 $PredicateComparison]: unable to prove that (or (forall ((v_main_~k~0_BEFORE_CALL_221 Int) (v_main_~yy~0_BEFORE_CALL_154 Int) (v_main_~s~0_BEFORE_CALL_349 Int) (v_main_~p~0_BEFORE_CALL_284 Int) (v_main_~q~0_BEFORE_CALL_346 Int) (v_main_~xy~0_BEFORE_CALL_182 Int) (v_main_~y~0_BEFORE_CALL_371 Int) (v_main_~x~0_BEFORE_CALL_363 Int) (v_main_~r~0_BEFORE_CALL_304 Int)) (let ((.cse7 (* v_main_~x~0_BEFORE_CALL_363 v_main_~q~0_BEFORE_CALL_346)) (.cse8 (* v_main_~y~0_BEFORE_CALL_371 v_main_~s~0_BEFORE_CALL_349)) (.cse9 (+ (* (- 1) v_main_~k~0_BEFORE_CALL_221 v_main_~q~0_BEFORE_CALL_346) v_main_~p~0_BEFORE_CALL_284)) (.cse10 (+ (* (- 1) (* v_main_~k~0_BEFORE_CALL_221 v_main_~s~0_BEFORE_CALL_349)) v_main_~r~0_BEFORE_CALL_304)) (.cse3 (* v_main_~p~0_BEFORE_CALL_284 v_main_~x~0_BEFORE_CALL_363)) (.cse4 (* v_main_~y~0_BEFORE_CALL_371 v_main_~r~0_BEFORE_CALL_304))) (let ((.cse6 (+ .cse3 .cse4)) (.cse0 (* .cse10 v_main_~y~0_BEFORE_CALL_371)) (.cse2 (* .cse9 v_main_~x~0_BEFORE_CALL_363)) (.cse5 (+ .cse7 .cse8))) (or (= (let ((.cse1 (div (+ .cse3 (* .cse0 (- 1)) (* (- 1) .cse2) .cse4) .cse5))) (+ .cse0 (* .cse1 v_main_~x~0_BEFORE_CALL_363 v_main_~q~0_BEFORE_CALL_346) (* .cse1 v_main_~y~0_BEFORE_CALL_371 v_main_~s~0_BEFORE_CALL_349) .cse2)) .cse6) (<= (+ .cse7 (* v_main_~k~0_BEFORE_CALL_221 v_main_~x~0_BEFORE_CALL_363 v_main_~q~0_BEFORE_CALL_346) .cse8 (* v_main_~k~0_BEFORE_CALL_221 v_main_~y~0_BEFORE_CALL_371 v_main_~s~0_BEFORE_CALL_349)) .cse6) (= (+ .cse0 .cse2 (* v_main_~y~0_BEFORE_CALL_371 (+ .cse0 .cse2))) (+ .cse0 (* .cse9 v_main_~xy~0_BEFORE_CALL_182) (* .cse10 v_main_~yy~0_BEFORE_CALL_154) .cse2)) (not (= (+ .cse7 (* v_main_~y~0_BEFORE_CALL_371 .cse5) .cse8) (+ .cse7 (* v_main_~xy~0_BEFORE_CALL_182 v_main_~q~0_BEFORE_CALL_346) .cse8 (* v_main_~s~0_BEFORE_CALL_349 v_main_~yy~0_BEFORE_CALL_154)))))))) (not (= |c___VERIFIER_assert_#in~cond| 1)) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-03-19 04:44:16,285 WARN L232 SmtUtils]: Spent 8.43s on a formula simplification that was a NOOP. DAG size: 10 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-03-19 04:45:05,025 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse8 (* c_main_~q~0 c_main_~x~0)) (.cse9 (* c_main_~s~0 c_main_~y~0)) (.cse2 (+ c_main_~p~0 (* (- 1) c_main_~q~0 c_main_~k~0))) (.cse3 (+ c_main_~r~0 (* (- 1) (* c_main_~s~0 c_main_~k~0))))) (let ((.cse0 (* .cse3 c_main_~y~0)) (.cse1 (* .cse2 c_main_~x~0)) (.cse4 (* c_main_~q~0 c_main_~xy~0)) (.cse5 (* c_main_~yy~0 c_main_~s~0)) (.cse7 (+ .cse8 .cse9))) (or (not (= (+ .cse0 .cse1 (* c_main_~c~0 c_main_~y~0)) (+ (* c_main_~xy~0 .cse2) c_main_~c~0 (* c_main_~yy~0 .cse3)))) (not (= c_main_~c~0 (+ .cse0 .cse1))) (let ((.cse6 (div (* 2 c_main_~c~0) c_main_~c~0))) (= (+ .cse4 .cse5 (* .cse6 .cse3 c_main_~y~0 c_main_~y~0) (* .cse6 .cse2 c_main_~x~0 c_main_~y~0)) (+ (* c_main_~yy~0 .cse6 .cse3) (* c_main_~q~0 c_main_~x~0 c_main_~y~0) (* c_main_~xy~0 .cse6 .cse2) (* c_main_~s~0 c_main_~y~0 c_main_~y~0)))) (<= (* 3 c_main_~c~0) .cse7) (not (= (+ .cse8 .cse9 (* c_main_~b~0 c_main_~y~0)) (+ .cse4 .cse5 c_main_~b~0))) (<= c_main_~b~0 c_main_~c~0) (not (= c_main_~b~0 .cse7))))) is different from true [2022-03-19 04:45:31,483 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse4 (* c_main_~q~0 c_main_~x~0)) (.cse5 (* c_main_~s~0 c_main_~y~0))) (let ((.cse1 (* c_main_~q~0 c_main_~xy~0)) (.cse2 (* c_main_~yy~0 c_main_~s~0)) (.cse3 (+ .cse4 .cse5)) (.cse8 (* c_main_~p~0 c_main_~x~0)) (.cse9 (* c_main_~r~0 c_main_~y~0)) (.cse6 (* c_main_~q~0 c_main_~x~0 c_main_~k~0)) (.cse7 (* c_main_~s~0 c_main_~y~0 c_main_~k~0))) (or (let ((.cse0 (div (* 2 c_main_~c~0) c_main_~c~0))) (= (+ (* c_main_~p~0 .cse0 c_main_~x~0 c_main_~y~0) .cse1 (* c_main_~q~0 c_main_~xy~0 .cse0 c_main_~k~0) .cse2 (* c_main_~yy~0 c_main_~s~0 .cse0 c_main_~k~0) (* .cse0 c_main_~r~0 c_main_~y~0 c_main_~y~0)) (+ (* c_main_~yy~0 .cse0 c_main_~r~0) (* c_main_~s~0 .cse0 c_main_~y~0 c_main_~y~0 c_main_~k~0) (* c_main_~q~0 .cse0 c_main_~x~0 c_main_~y~0 c_main_~k~0) (* c_main_~q~0 c_main_~x~0 c_main_~y~0) (* c_main_~xy~0 c_main_~p~0 .cse0) (* c_main_~s~0 c_main_~y~0 c_main_~y~0)))) (<= (* 3 c_main_~c~0) .cse3) (not (= (+ .cse4 .cse5 (* c_main_~b~0 c_main_~y~0)) (+ .cse1 .cse2 c_main_~b~0))) (<= c_main_~b~0 c_main_~c~0) (not (= c_main_~b~0 .cse3)) (not (= (+ (* c_main_~yy~0 c_main_~r~0) .cse6 c_main_~c~0 .cse7 (* c_main_~xy~0 c_main_~p~0)) (+ (* c_main_~q~0 c_main_~xy~0 c_main_~k~0) (* c_main_~yy~0 c_main_~s~0 c_main_~k~0) .cse8 .cse9 (* c_main_~c~0 c_main_~y~0)))) (not (= (+ .cse8 .cse9) (+ .cse6 c_main_~c~0 .cse7)))))) is different from true [2022-03-19 04:46:01,594 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse9 (* c_main_~p~0 c_main_~x~0)) (.cse10 (* c_main_~r~0 c_main_~y~0)) (.cse5 (* c_main_~q~0 c_main_~x~0)) (.cse6 (* c_main_~s~0 c_main_~y~0))) (let ((.cse1 (* c_main_~q~0 c_main_~xy~0)) (.cse2 (* c_main_~yy~0 c_main_~s~0)) (.cse4 (+ .cse5 .cse6)) (.cse3 (+ .cse9 .cse10)) (.cse7 (* c_main_~q~0 c_main_~x~0 c_main_~k~0)) (.cse8 (* c_main_~s~0 c_main_~y~0 c_main_~k~0))) (or (let ((.cse0 (div (* 2 c_main_~c~0) c_main_~c~0))) (= (+ (* c_main_~p~0 .cse0 c_main_~x~0 c_main_~y~0) .cse1 (* c_main_~q~0 c_main_~xy~0 .cse0 c_main_~k~0) .cse2 (* c_main_~yy~0 c_main_~s~0 .cse0 c_main_~k~0) (* .cse0 c_main_~r~0 c_main_~y~0 c_main_~y~0)) (+ (* c_main_~yy~0 .cse0 c_main_~r~0) (* c_main_~s~0 .cse0 c_main_~y~0 c_main_~y~0 c_main_~k~0) (* c_main_~q~0 .cse0 c_main_~x~0 c_main_~y~0 c_main_~k~0) (* c_main_~q~0 c_main_~x~0 c_main_~y~0) (* c_main_~xy~0 c_main_~p~0 .cse0) (* c_main_~s~0 c_main_~y~0 c_main_~y~0)))) (not (= .cse3 c_main_~a~0)) (<= (* 3 c_main_~c~0) .cse4) (not (= (+ .cse5 .cse6 (* c_main_~b~0 c_main_~y~0)) (+ .cse1 .cse2 c_main_~b~0))) (<= c_main_~b~0 c_main_~c~0) (not (= c_main_~b~0 .cse4)) (not (= (+ (* c_main_~yy~0 c_main_~r~0) .cse7 c_main_~c~0 .cse8 (* c_main_~xy~0 c_main_~p~0)) (+ (* c_main_~q~0 c_main_~xy~0 c_main_~k~0) (* c_main_~yy~0 c_main_~s~0 c_main_~k~0) .cse9 .cse10 (* c_main_~c~0 c_main_~y~0)))) (not (= .cse3 (+ .cse7 c_main_~c~0 .cse8)))))) is different from true [2022-03-19 04:46:38,391 WARN L855 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((v_main_~yy~0_BEFORE_CALL_165 Int) (v_main_~p~0_BEFORE_CALL_295 Int) (v_main_~q~0_BEFORE_CALL_357 Int) (v_main_~s~0_BEFORE_CALL_360 Int) (v_main_~k~0_BEFORE_CALL_224 Int) (v_main_~xy~0_BEFORE_CALL_193 Int) (v_main_~y~0_BEFORE_CALL_382 Int) (v_main_~x~0_BEFORE_CALL_374 Int) (v_main_~r~0_BEFORE_CALL_315 Int)) (let ((.cse0 (* v_main_~y~0_BEFORE_CALL_382 v_main_~r~0_BEFORE_CALL_315)) (.cse9 (* (- 1) v_main_~k~0_BEFORE_CALL_224 v_main_~x~0_BEFORE_CALL_374 v_main_~q~0_BEFORE_CALL_357)) (.cse10 (* (- 1) v_main_~k~0_BEFORE_CALL_224 v_main_~y~0_BEFORE_CALL_382 v_main_~s~0_BEFORE_CALL_360)) (.cse1 (* v_main_~p~0_BEFORE_CALL_295 v_main_~x~0_BEFORE_CALL_374))) (let ((.cse11 (+ .cse0 .cse9 .cse10 .cse1)) (.cse7 (* v_main_~xy~0_BEFORE_CALL_193 v_main_~q~0_BEFORE_CALL_357)) (.cse8 (* v_main_~s~0_BEFORE_CALL_360 v_main_~yy~0_BEFORE_CALL_165)) (.cse2 (* v_main_~k~0_BEFORE_CALL_224 v_main_~x~0_BEFORE_CALL_374 v_main_~q~0_BEFORE_CALL_357)) (.cse4 (* v_main_~x~0_BEFORE_CALL_374 v_main_~q~0_BEFORE_CALL_357)) (.cse5 (* v_main_~y~0_BEFORE_CALL_382 v_main_~s~0_BEFORE_CALL_360)) (.cse3 (* v_main_~k~0_BEFORE_CALL_224 v_main_~y~0_BEFORE_CALL_382 v_main_~s~0_BEFORE_CALL_360))) (or (<= (+ (* .cse0 3) (* 3 .cse1)) (+ (* .cse2 3) (* 3 .cse3) .cse4 .cse5)) (let ((.cse6 (div (+ (* 2 .cse9) (* .cse0 2) (* 2 .cse1) (* 2 .cse10)) .cse11))) (= (+ (* v_main_~y~0_BEFORE_CALL_382 v_main_~y~0_BEFORE_CALL_382 .cse6 v_main_~r~0_BEFORE_CALL_315) (* v_main_~k~0_BEFORE_CALL_224 .cse6 v_main_~s~0_BEFORE_CALL_360 v_main_~yy~0_BEFORE_CALL_165) .cse7 .cse8 (* v_main_~k~0_BEFORE_CALL_224 .cse6 v_main_~xy~0_BEFORE_CALL_193 v_main_~q~0_BEFORE_CALL_357) (* v_main_~p~0_BEFORE_CALL_295 v_main_~y~0_BEFORE_CALL_382 .cse6 v_main_~x~0_BEFORE_CALL_374)) (+ (* v_main_~p~0_BEFORE_CALL_295 .cse6 v_main_~xy~0_BEFORE_CALL_193) (* v_main_~y~0_BEFORE_CALL_382 v_main_~y~0_BEFORE_CALL_382 v_main_~s~0_BEFORE_CALL_360) (* v_main_~k~0_BEFORE_CALL_224 v_main_~y~0_BEFORE_CALL_382 .cse6 v_main_~x~0_BEFORE_CALL_374 v_main_~q~0_BEFORE_CALL_357) (* .cse6 v_main_~yy~0_BEFORE_CALL_165 v_main_~r~0_BEFORE_CALL_315) (* v_main_~y~0_BEFORE_CALL_382 v_main_~x~0_BEFORE_CALL_374 v_main_~q~0_BEFORE_CALL_357) (* v_main_~k~0_BEFORE_CALL_224 v_main_~y~0_BEFORE_CALL_382 v_main_~y~0_BEFORE_CALL_382 .cse6 v_main_~s~0_BEFORE_CALL_360)))) (not (= (+ .cse0 (* v_main_~k~0_BEFORE_CALL_224 v_main_~s~0_BEFORE_CALL_360 v_main_~yy~0_BEFORE_CALL_165) (* v_main_~y~0_BEFORE_CALL_382 .cse11) .cse1 (* v_main_~k~0_BEFORE_CALL_224 v_main_~xy~0_BEFORE_CALL_193 v_main_~q~0_BEFORE_CALL_357)) (+ (* v_main_~yy~0_BEFORE_CALL_165 v_main_~r~0_BEFORE_CALL_315) .cse0 .cse2 .cse9 (* v_main_~p~0_BEFORE_CALL_295 v_main_~xy~0_BEFORE_CALL_193) .cse10 .cse1 .cse3))) (not (= (+ .cse7 .cse8 .cse4 .cse5) (+ (* v_main_~y~0_BEFORE_CALL_382 (+ .cse4 .cse5)) .cse4 .cse5))) (<= (+ .cse2 .cse4 .cse5 .cse3) (+ .cse0 .cse1))))))) is different from true [2022-03-19 04:47:57,032 WARN L855 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((v_main_~yy~0_BEFORE_CALL_165 Int) (v_main_~p~0_BEFORE_CALL_295 Int) (v_main_~q~0_BEFORE_CALL_357 Int) (v_main_~s~0_BEFORE_CALL_360 Int) (v_main_~k~0_BEFORE_CALL_224 Int) (v_main_~xy~0_BEFORE_CALL_193 Int) (v_main_~y~0_BEFORE_CALL_382 Int) (v_main_~x~0_BEFORE_CALL_374 Int) (v_main_~r~0_BEFORE_CALL_315 Int)) (let ((.cse0 (* v_main_~y~0_BEFORE_CALL_382 v_main_~r~0_BEFORE_CALL_315)) (.cse9 (* (- 1) v_main_~k~0_BEFORE_CALL_224 v_main_~x~0_BEFORE_CALL_374 v_main_~q~0_BEFORE_CALL_357)) (.cse10 (* (- 1) v_main_~k~0_BEFORE_CALL_224 v_main_~y~0_BEFORE_CALL_382 v_main_~s~0_BEFORE_CALL_360)) (.cse1 (* v_main_~p~0_BEFORE_CALL_295 v_main_~x~0_BEFORE_CALL_374))) (let ((.cse11 (+ .cse0 .cse9 .cse10 .cse1)) (.cse7 (* v_main_~xy~0_BEFORE_CALL_193 v_main_~q~0_BEFORE_CALL_357)) (.cse8 (* v_main_~s~0_BEFORE_CALL_360 v_main_~yy~0_BEFORE_CALL_165)) (.cse2 (* v_main_~k~0_BEFORE_CALL_224 v_main_~x~0_BEFORE_CALL_374 v_main_~q~0_BEFORE_CALL_357)) (.cse4 (* v_main_~x~0_BEFORE_CALL_374 v_main_~q~0_BEFORE_CALL_357)) (.cse5 (* v_main_~y~0_BEFORE_CALL_382 v_main_~s~0_BEFORE_CALL_360)) (.cse3 (* v_main_~k~0_BEFORE_CALL_224 v_main_~y~0_BEFORE_CALL_382 v_main_~s~0_BEFORE_CALL_360))) (or (<= (+ (* .cse0 3) (* 3 .cse1)) (+ (* .cse2 3) (* 3 .cse3) .cse4 .cse5)) (let ((.cse6 (div (+ (* 2 .cse9) (* .cse0 2) (* 2 .cse1) (* 2 .cse10)) .cse11))) (= (+ (* v_main_~y~0_BEFORE_CALL_382 v_main_~y~0_BEFORE_CALL_382 .cse6 v_main_~r~0_BEFORE_CALL_315) (* v_main_~k~0_BEFORE_CALL_224 .cse6 v_main_~s~0_BEFORE_CALL_360 v_main_~yy~0_BEFORE_CALL_165) .cse7 .cse8 (* v_main_~k~0_BEFORE_CALL_224 .cse6 v_main_~xy~0_BEFORE_CALL_193 v_main_~q~0_BEFORE_CALL_357) (* v_main_~p~0_BEFORE_CALL_295 v_main_~y~0_BEFORE_CALL_382 .cse6 v_main_~x~0_BEFORE_CALL_374)) (+ (* v_main_~p~0_BEFORE_CALL_295 .cse6 v_main_~xy~0_BEFORE_CALL_193) (* v_main_~y~0_BEFORE_CALL_382 v_main_~y~0_BEFORE_CALL_382 v_main_~s~0_BEFORE_CALL_360) (* v_main_~k~0_BEFORE_CALL_224 v_main_~y~0_BEFORE_CALL_382 .cse6 v_main_~x~0_BEFORE_CALL_374 v_main_~q~0_BEFORE_CALL_357) (* .cse6 v_main_~yy~0_BEFORE_CALL_165 v_main_~r~0_BEFORE_CALL_315) (* v_main_~y~0_BEFORE_CALL_382 v_main_~x~0_BEFORE_CALL_374 v_main_~q~0_BEFORE_CALL_357) (* v_main_~k~0_BEFORE_CALL_224 v_main_~y~0_BEFORE_CALL_382 v_main_~y~0_BEFORE_CALL_382 .cse6 v_main_~s~0_BEFORE_CALL_360)))) (not (= (+ .cse0 (* v_main_~k~0_BEFORE_CALL_224 v_main_~s~0_BEFORE_CALL_360 v_main_~yy~0_BEFORE_CALL_165) (* v_main_~y~0_BEFORE_CALL_382 .cse11) .cse1 (* v_main_~k~0_BEFORE_CALL_224 v_main_~xy~0_BEFORE_CALL_193 v_main_~q~0_BEFORE_CALL_357)) (+ (* v_main_~yy~0_BEFORE_CALL_165 v_main_~r~0_BEFORE_CALL_315) .cse0 .cse2 .cse9 (* v_main_~p~0_BEFORE_CALL_295 v_main_~xy~0_BEFORE_CALL_193) .cse10 .cse1 .cse3))) (not (= (+ .cse7 .cse8 .cse4 .cse5) (+ (* v_main_~y~0_BEFORE_CALL_382 (+ .cse4 .cse5)) .cse4 .cse5))) (<= (+ .cse2 .cse4 .cse5 .cse3) (+ .cse0 .cse1)))))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-03-19 04:48:26,554 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse6 (* c_main_~q~0 c_main_~x~0)) (.cse7 (* c_main_~s~0 c_main_~y~0))) (let ((.cse1 (* c_main_~q~0 c_main_~xy~0)) (.cse2 (* c_main_~yy~0 c_main_~s~0)) (.cse5 (+ .cse6 .cse7)) (.cse3 (* c_main_~p~0 c_main_~x~0)) (.cse4 (* c_main_~r~0 c_main_~y~0))) (or (let ((.cse0 (div (* 2 c_main_~c~0) c_main_~c~0))) (= (+ (* c_main_~p~0 .cse0 c_main_~x~0 c_main_~y~0) .cse1 (* c_main_~q~0 c_main_~xy~0 .cse0 c_main_~k~0) .cse2 (* c_main_~yy~0 c_main_~s~0 .cse0 c_main_~k~0) (* .cse0 c_main_~r~0 c_main_~y~0 c_main_~y~0)) (+ (* c_main_~yy~0 .cse0 c_main_~r~0) (* c_main_~s~0 .cse0 c_main_~y~0 c_main_~y~0 c_main_~k~0) (* c_main_~q~0 .cse0 c_main_~x~0 c_main_~y~0 c_main_~k~0) (* c_main_~q~0 c_main_~x~0 c_main_~y~0) (* c_main_~xy~0 c_main_~p~0 .cse0) (* c_main_~s~0 c_main_~y~0 c_main_~y~0)))) (not (= (+ .cse3 .cse4) c_main_~a~0)) (not (= (+ (* c_main_~b~0 c_main_~k~0) c_main_~c~0) c_main_~a~0)) (<= (* 3 c_main_~c~0) .cse5) (not (= (+ .cse6 .cse7 (* c_main_~b~0 c_main_~y~0)) (+ .cse1 .cse2 c_main_~b~0))) (<= c_main_~b~0 c_main_~c~0) (not (= c_main_~b~0 .cse5)) (not (= (+ (* c_main_~yy~0 c_main_~r~0) (* c_main_~q~0 c_main_~x~0 c_main_~k~0) c_main_~c~0 (* c_main_~s~0 c_main_~y~0 c_main_~k~0) (* c_main_~xy~0 c_main_~p~0)) (+ (* c_main_~q~0 c_main_~xy~0 c_main_~k~0) (* c_main_~yy~0 c_main_~s~0 c_main_~k~0) .cse3 .cse4 (* c_main_~c~0 c_main_~y~0))))))) is different from true [2022-03-19 04:49:20,819 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse6 (* c_main_~q~0 c_main_~x~0)) (.cse7 (* c_main_~s~0 c_main_~y~0))) (let ((.cse4 (* c_main_~q~0 c_main_~xy~0)) (.cse5 (* c_main_~yy~0 c_main_~s~0)) (.cse2 (+ .cse6 .cse7)) (.cse0 (* c_main_~p~0 c_main_~x~0)) (.cse1 (* c_main_~r~0 c_main_~y~0))) (or (not (= (+ .cse0 .cse1) c_main_~a~0)) (<= (* 3 c_main_~a~0) .cse2) (let ((.cse3 (div (* 2 c_main_~a~0) c_main_~a~0))) (= (+ (* c_main_~s~0 .cse3 c_main_~y~0 c_main_~y~0 0) (* c_main_~xy~0 c_main_~p~0 .cse3) (* c_main_~q~0 c_main_~x~0 c_main_~y~0) (* c_main_~q~0 .cse3 c_main_~x~0 c_main_~y~0 0) (* c_main_~s~0 c_main_~y~0 c_main_~y~0) (* c_main_~yy~0 c_main_~r~0 .cse3)) (+ .cse4 .cse5 (* c_main_~q~0 c_main_~xy~0 .cse3 0) (* c_main_~p~0 .cse3 c_main_~x~0 c_main_~y~0) (* c_main_~yy~0 c_main_~s~0 .cse3 0) (* c_main_~r~0 .cse3 c_main_~y~0 c_main_~y~0)))) (not (= (+ .cse6 .cse7 (* c_main_~b~0 c_main_~y~0)) (+ .cse4 .cse5 c_main_~b~0))) (not (= c_main_~b~0 .cse2)) (not (= (+ (* c_main_~yy~0 c_main_~s~0 0) .cse0 .cse1 (* c_main_~y~0 c_main_~a~0) (* c_main_~q~0 c_main_~xy~0 0)) (+ (* c_main_~q~0 c_main_~x~0 0) (* c_main_~yy~0 c_main_~r~0) (* c_main_~s~0 c_main_~y~0 0) c_main_~a~0 (* c_main_~xy~0 c_main_~p~0)))) (<= c_main_~b~0 c_main_~a~0)))) is different from true [2022-03-19 04:50:30,319 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 207 proven. 81 refuted. 56 times theorem prover too weak. 441 trivial. 60 not checked. [2022-03-19 04:50:30,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:50:30,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298177996] [2022-03-19 04:50:30,320 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:50:30,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357172139] [2022-03-19 04:50:30,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357172139] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:50:30,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:50:30,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 29] total 45 [2022-03-19 04:50:30,320 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:50:30,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [376782726] [2022-03-19 04:50:30,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [376782726] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:50:30,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:50:30,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 04:50:30,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635552157] [2022-03-19 04:50:30,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:50:30,321 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 04:50:30,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:30,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 04:50:30,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=928, Unknown=23, NotChecked=750, Total=1980 [2022-03-19 04:50:30,321 INFO L87 Difference]: Start difference. First operand 329 states and 434 transitions. Second operand has 21 states, 20 states have (on average 1.85) internal successors, (37), 16 states have internal predecessors, (37), 11 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 10 states have call predecessors, (26), 11 states have call successors, (26) [2022-03-19 04:50:35,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:50:35,215 INFO L93 Difference]: Finished difference Result 342 states and 445 transitions. [2022-03-19 04:50:35,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-19 04:50:35,216 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.85) internal successors, (37), 16 states have internal predecessors, (37), 11 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 10 states have call predecessors, (26), 11 states have call successors, (26) Word has length 154 [2022-03-19 04:50:35,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:50:35,223 INFO L225 Difference]: With dead ends: 342 [2022-03-19 04:50:35,224 INFO L226 Difference]: Without dead ends: 340 [2022-03-19 04:50:35,224 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 258 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 10 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 83.2s TimeCoverageRelationStatistics Valid=337, Invalid=1239, Unknown=24, NotChecked=850, Total=2450 [2022-03-19 04:50:35,225 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 53 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-19 04:50:35,225 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 438 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 890 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-19 04:50:35,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-03-19 04:50:35,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 337. [2022-03-19 04:50:35,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 185 states have (on average 1.1243243243243244) internal successors, (208), 186 states have internal predecessors, (208), 117 states have call successors, (117), 35 states have call predecessors, (117), 34 states have return successors, (115), 115 states have call predecessors, (115), 115 states have call successors, (115) [2022-03-19 04:50:35,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 440 transitions. [2022-03-19 04:50:35,284 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 440 transitions. Word has length 154 [2022-03-19 04:50:35,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:50:35,284 INFO L478 AbstractCegarLoop]: Abstraction has 337 states and 440 transitions. [2022-03-19 04:50:35,284 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.85) internal successors, (37), 16 states have internal predecessors, (37), 11 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 10 states have call predecessors, (26), 11 states have call successors, (26) [2022-03-19 04:50:35,284 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 440 transitions. [2022-03-19 04:50:35,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-03-19 04:50:35,285 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:50:35,285 INFO L500 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:50:35,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-19 04:50:35,491 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-19 04:50:35,491 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:50:35,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:50:35,491 INFO L85 PathProgramCache]: Analyzing trace with hash -2059109762, now seen corresponding path program 17 times [2022-03-19 04:50:35,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:50:35,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1752977249] [2022-03-19 04:50:35,492 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:50:35,492 INFO L85 PathProgramCache]: Analyzing trace with hash -2059109762, now seen corresponding path program 18 times [2022-03-19 04:50:35,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:50:35,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12209928] [2022-03-19 04:50:35,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:50:35,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:50:35,500 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:50:35,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [258799446] [2022-03-19 04:50:35,500 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:50:35,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:50:35,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:50:35,501 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 04:50:35,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-19 04:50:35,935 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 04:50:35,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:50:35,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-19 04:50:35,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:50:36,598 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:50:38,132 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 04:50:39,135 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 132 proven. 80 refuted. 0 times theorem prover too weak. 633 trivial. 0 not checked. [2022-03-19 04:50:39,136 INFO L328 TraceCheckSpWp]: Computing backward predicates...