/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/hard-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 04:59:28,105 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 04:59:28,107 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 04:59:28,143 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 04:59:28,154 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-19 04:59:28,163 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-19 04:59:28,164 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-19 04:59:28,166 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-19 04:59:28,167 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-19 04:59:28,169 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-19 04:59:28,173 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-19 04:59:28,174 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-19 04:59:28,175 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-19 04:59:28,181 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-19 04:59:28,182 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-19 04:59:28,183 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-19 04:59:28,183 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-19 04:59:28,186 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-19 04:59:28,191 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 04:59:28,192 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 04:59:28,200 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 04:59:28,200 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 04:59:28,214 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 04:59:28,215 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 04:59:28,217 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 04:59:28,217 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 04:59:28,217 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 04:59:28,217 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 04:59:28,217 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 04:59:28,217 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 04:59:28,217 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 04:59:28,218 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 04:59:28,218 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 04:59:28,218 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 04:59:28,218 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 04:59:28,219 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 04:59:28,219 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 04:59:28,219 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 04:59:28,219 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 04:59:28,219 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 04:59:28,219 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 04:59:28,219 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 04:59:28,220 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 04:59:28,220 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 04:59:28,220 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 04:59:28,220 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 04:59:28,220 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-19 04:59:28,220 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 04:59:28,404 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 04:59:28,420 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 04:59:28,422 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 04:59:28,422 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 04:59:28,423 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 04:59:28,424 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound10.c [2022-03-19 04:59:28,482 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d25931c9/92cb7d0cb2fb46188f1cb1cf0a260ec7/FLAG285cdb80c [2022-03-19 04:59:28,853 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 04:59:28,854 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound10.c [2022-03-19 04:59:28,860 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d25931c9/92cb7d0cb2fb46188f1cb1cf0a260ec7/FLAG285cdb80c [2022-03-19 04:59:28,870 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d25931c9/92cb7d0cb2fb46188f1cb1cf0a260ec7 [2022-03-19 04:59:28,872 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 04:59:28,873 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 04:59:28,876 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 04:59:28,877 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 04:59:28,879 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 04:59:28,880 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 04:59:28" (1/1) ... [2022-03-19 04:59:28,880 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73058f31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:59:28, skipping insertion in model container [2022-03-19 04:59:28,881 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 04:59:28" (1/1) ... [2022-03-19 04:59:28,887 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 04:59:28,902 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 04:59:29,101 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/hard-ll_valuebound10.c[538,551] [2022-03-19 04:59:29,127 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 04:59:29,133 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 04:59:29,140 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/hard-ll_valuebound10.c[538,551] [2022-03-19 04:59:29,146 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 04:59:29,155 INFO L208 MainTranslator]: Completed translation [2022-03-19 04:59:29,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:59:29 WrapperNode [2022-03-19 04:59:29,155 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 04:59:29,156 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 04:59:29,156 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 04:59:29,157 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 04:59:29,165 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:59:29" (1/1) ... [2022-03-19 04:59:29,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:59:29" (1/1) ... [2022-03-19 04:59:29,170 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:59:29" (1/1) ... [2022-03-19 04:59:29,170 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:59:29" (1/1) ... [2022-03-19 04:59:29,174 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:59:29" (1/1) ... [2022-03-19 04:59:29,177 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:59:29" (1/1) ... [2022-03-19 04:59:29,178 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:59:29" (1/1) ... [2022-03-19 04:59:29,179 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 04:59:29,180 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 04:59:29,180 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 04:59:29,180 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 04:59:29,186 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:59:29" (1/1) ... [2022-03-19 04:59:29,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 04:59:29,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:59:29,208 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 04:59:29,223 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 04:59:29,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 04:59:29,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 04:59:29,243 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 04:59:29,243 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 04:59:29,243 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 04:59:29,244 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 04:59:29,244 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 04:59:29,244 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 04:59:29,244 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 04:59:29,244 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 04:59:29,244 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-19 04:59:29,244 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 04:59:29,245 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 04:59:29,245 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 04:59:29,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 04:59:29,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 04:59:29,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 04:59:29,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 04:59:29,245 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 04:59:29,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 04:59:29,295 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 04:59:29,296 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 04:59:29,390 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 04:59:29,396 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 04:59:29,396 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-19 04:59:29,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 04:59:29 BoogieIcfgContainer [2022-03-19 04:59:29,397 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 04:59:29,400 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 04:59:29,400 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 04:59:29,409 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 04:59:29,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 04:59:28" (1/3) ... [2022-03-19 04:59:29,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3363291e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 04:59:29, skipping insertion in model container [2022-03-19 04:59:29,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 04:59:29" (2/3) ... [2022-03-19 04:59:29,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3363291e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 04:59:29, skipping insertion in model container [2022-03-19 04:59:29,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 04:59:29" (3/3) ... [2022-03-19 04:59:29,411 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound10.c [2022-03-19 04:59:29,415 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 04:59:29,415 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 04:59:29,444 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 04:59:29,450 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 04:59:29,450 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 04:59:29,462 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 04:59:29,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-19 04:59:29,468 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:59:29,469 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:59:29,469 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:59:29,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:59:29,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1784424332, now seen corresponding path program 1 times [2022-03-19 04:59:29,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:59:29,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1677207756] [2022-03-19 04:59:29,493 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:59:29,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1784424332, now seen corresponding path program 2 times [2022-03-19 04:59:29,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:59:29,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529061288] [2022-03-19 04:59:29,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:59:29,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:59:29,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 04:59:29,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 04:59:29,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 04:59:29,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 04:59:29,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 04:59:29,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 04:59:29,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 04:59:29,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 04:59:29,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 04:59:29,704 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 04:59:29,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:59:29,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529061288] [2022-03-19 04:59:29,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529061288] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:59:29,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:59:29,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 04:59:29,722 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:59:29,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1677207756] [2022-03-19 04:59:29,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1677207756] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:59:29,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:59:29,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 04:59:29,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939489896] [2022-03-19 04:59:29,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:59:29,726 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 04:59:29,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:59:29,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 04:59:29,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 04:59:29,778 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 04:59:29,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:59:29,903 INFO L93 Difference]: Finished difference Result 69 states and 110 transitions. [2022-03-19 04:59:29,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 04:59:29,906 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-03-19 04:59:29,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:59:29,913 INFO L225 Difference]: With dead ends: 69 [2022-03-19 04:59:29,913 INFO L226 Difference]: Without dead ends: 33 [2022-03-19 04:59:29,915 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 04:59:29,918 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:59:29,921 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:59:29,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-19 04:59:29,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-03-19 04:59:29,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 04:59:29,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-03-19 04:59:29,969 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2022-03-19 04:59:29,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:59:29,969 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-03-19 04:59:29,970 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 04:59:29,970 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-03-19 04:59:29,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-19 04:59:29,972 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:59:29,972 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:59:29,973 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 04:59:29,973 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:59:29,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:59:29,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1361835634, now seen corresponding path program 1 times [2022-03-19 04:59:29,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:59:29,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [802976002] [2022-03-19 04:59:29,981 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:59:29,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1361835634, now seen corresponding path program 2 times [2022-03-19 04:59:29,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:59:29,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469043711] [2022-03-19 04:59:29,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:59:29,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:59:30,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 04:59:30,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 04:59:30,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 04:59:30,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 04:59:30,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 04:59:30,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 04:59:30,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 04:59:30,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 04:59:30,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 04:59:30,142 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 04:59:30,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:59:30,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469043711] [2022-03-19 04:59:30,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469043711] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:59:30,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:59:30,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 04:59:30,143 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:59:30,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [802976002] [2022-03-19 04:59:30,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [802976002] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:59:30,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:59:30,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 04:59:30,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102131749] [2022-03-19 04:59:30,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:59:30,145 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 04:59:30,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:59:30,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 04:59:30,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 04:59:30,146 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-19 04:59:30,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:59:30,342 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2022-03-19 04:59:30,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 04:59:30,342 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-03-19 04:59:30,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:59:30,346 INFO L225 Difference]: With dead ends: 46 [2022-03-19 04:59:30,346 INFO L226 Difference]: Without dead ends: 44 [2022-03-19 04:59:30,346 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-19 04:59:30,349 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 38 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:59:30,349 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 48 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:59:30,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-19 04:59:30,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-03-19 04:59:30,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 04:59:30,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-03-19 04:59:30,373 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2022-03-19 04:59:30,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:59:30,374 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-03-19 04:59:30,374 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-19 04:59:30,374 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-03-19 04:59:30,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-19 04:59:30,375 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:59:30,375 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:59:30,376 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 04:59:30,376 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:59:30,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:59:30,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1382067636, now seen corresponding path program 1 times [2022-03-19 04:59:30,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:59:30,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1979445696] [2022-03-19 04:59:30,381 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:59:30,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1382067636, now seen corresponding path program 2 times [2022-03-19 04:59:30,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:59:30,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041009185] [2022-03-19 04:59:30,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:59:30,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:59:30,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 04:59:30,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 04:59:30,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 04:59:30,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 04:59:30,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 04:59:30,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 04:59:30,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 04:59:30,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 04:59:30,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 04:59:30,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-19 04:59:30,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 04:59:30,509 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 04:59:30,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:59:30,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041009185] [2022-03-19 04:59:30,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041009185] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:59:30,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:59:30,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 04:59:30,510 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:59:30,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1979445696] [2022-03-19 04:59:30,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1979445696] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:59:30,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:59:30,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 04:59:30,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851961441] [2022-03-19 04:59:30,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:59:30,511 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 04:59:30,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:59:30,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 04:59:30,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 04:59:30,512 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 04:59:30,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:59:30,697 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2022-03-19 04:59:30,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 04:59:30,698 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-03-19 04:59:30,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:59:30,700 INFO L225 Difference]: With dead ends: 50 [2022-03-19 04:59:30,700 INFO L226 Difference]: Without dead ends: 48 [2022-03-19 04:59:30,701 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-19 04:59:30,704 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:59:30,710 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 48 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:59:30,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-19 04:59:30,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2022-03-19 04:59:30,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 04:59:30,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-03-19 04:59:30,726 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2022-03-19 04:59:30,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:59:30,727 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-03-19 04:59:30,727 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 04:59:30,727 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-03-19 04:59:30,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-19 04:59:30,728 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:59:30,728 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:59:30,728 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-19 04:59:30,728 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:59:30,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:59:30,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1455208590, now seen corresponding path program 1 times [2022-03-19 04:59:30,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:59:30,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1113030260] [2022-03-19 04:59:30,729 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:59:30,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1455208590, now seen corresponding path program 2 times [2022-03-19 04:59:30,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:59:30,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048105956] [2022-03-19 04:59:30,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:59:30,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:59:30,744 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:59:30,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1935013909] [2022-03-19 04:59:30,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:59:30,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:59:30,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:59:30,747 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 04:59:30,783 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 04:59:30,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:59:30,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:59:30,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 04:59:30,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:59:31,036 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 04:59:31,036 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 04:59:31,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:59:31,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048105956] [2022-03-19 04:59:31,037 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:59:31,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935013909] [2022-03-19 04:59:31,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935013909] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:59:31,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:59:31,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 04:59:31,038 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:59:31,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1113030260] [2022-03-19 04:59:31,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1113030260] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:59:31,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:59:31,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 04:59:31,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813464711] [2022-03-19 04:59:31,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:59:31,039 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 04:59:31,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:59:31,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 04:59:31,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 04:59:31,040 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-19 04:59:31,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:59:31,096 INFO L93 Difference]: Finished difference Result 69 states and 89 transitions. [2022-03-19 04:59:31,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 04:59:31,096 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2022-03-19 04:59:31,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:59:31,097 INFO L225 Difference]: With dead ends: 69 [2022-03-19 04:59:31,098 INFO L226 Difference]: Without dead ends: 55 [2022-03-19 04:59:31,098 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 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 04:59:31,099 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 8 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:59:31,099 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 157 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:59:31,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-19 04:59:31,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-03-19 04:59:31,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-19 04:59:31,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2022-03-19 04:59:31,111 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 38 [2022-03-19 04:59:31,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:59:31,111 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2022-03-19 04:59:31,111 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-19 04:59:31,111 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2022-03-19 04:59:31,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-19 04:59:31,112 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:59:31,112 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:59:31,131 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 04:59:31,319 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:59:31,320 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:59:31,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:59:31,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1688067263, now seen corresponding path program 1 times [2022-03-19 04:59:31,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:59:31,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1652334040] [2022-03-19 04:59:31,321 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:59:31,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1688067263, now seen corresponding path program 2 times [2022-03-19 04:59:31,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:59:31,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412799664] [2022-03-19 04:59:31,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:59:31,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:59:31,332 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:59:31,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1842200105] [2022-03-19 04:59:31,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:59:31,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:59:31,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:59:31,336 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 04:59:31,358 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 04:59:31,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:59:31,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:59:31,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-19 04:59:31,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:59:31,696 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-19 04:59:31,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:59:31,880 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 04:59:31,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:59:31,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412799664] [2022-03-19 04:59:31,881 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:59:31,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842200105] [2022-03-19 04:59:31,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842200105] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-19 04:59:31,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 04:59:31,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-03-19 04:59:31,882 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:59:31,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1652334040] [2022-03-19 04:59:31,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1652334040] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:59:31,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:59:31,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 04:59:31,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624808357] [2022-03-19 04:59:31,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:59:31,882 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 04:59:31,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:59:31,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 04:59:31,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-19 04:59:31,883 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 04:59:31,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:59:31,945 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2022-03-19 04:59:31,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 04:59:31,945 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2022-03-19 04:59:31,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:59:31,947 INFO L225 Difference]: With dead ends: 68 [2022-03-19 04:59:31,947 INFO L226 Difference]: Without dead ends: 66 [2022-03-19 04:59:31,947 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-19 04:59:31,948 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 12 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:59:31,948 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 178 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:59:31,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-19 04:59:31,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2022-03-19 04:59:31,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 38 states have internal predecessors, (43), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-19 04:59:31,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2022-03-19 04:59:31,960 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 45 [2022-03-19 04:59:31,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:59:31,961 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2022-03-19 04:59:31,961 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 04:59:31,961 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2022-03-19 04:59:31,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-19 04:59:31,962 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:59:31,962 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:59:31,988 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 04:59:32,183 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:59:32,184 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:59:32,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:59:32,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1471734606, now seen corresponding path program 1 times [2022-03-19 04:59:32,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:59:32,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1974659592] [2022-03-19 04:59:32,185 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:59:32,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1471734606, now seen corresponding path program 2 times [2022-03-19 04:59:32,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:59:32,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311563599] [2022-03-19 04:59:32,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:59:32,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:59:32,194 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:59:32,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1022526199] [2022-03-19 04:59:32,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:59:32,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:59:32,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:59:32,196 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 04:59:32,203 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 04:59:32,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:59:32,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:59:32,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-19 04:59:32,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:59:32,490 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-03-19 04:59:32,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:59:32,658 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-19 04:59:32,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:59:32,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311563599] [2022-03-19 04:59:32,659 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:59:32,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022526199] [2022-03-19 04:59:32,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022526199] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-19 04:59:32,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 04:59:32,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-03-19 04:59:32,665 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:59:32,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1974659592] [2022-03-19 04:59:32,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1974659592] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:59:32,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:59:32,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 04:59:32,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3483241] [2022-03-19 04:59:32,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:59:32,667 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 04:59:32,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:59:32,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 04:59:32,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-19 04:59:32,668 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 04:59:32,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:59:32,748 INFO L93 Difference]: Finished difference Result 76 states and 95 transitions. [2022-03-19 04:59:32,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 04:59:32,748 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 55 [2022-03-19 04:59:32,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:59:32,749 INFO L225 Difference]: With dead ends: 76 [2022-03-19 04:59:32,750 INFO L226 Difference]: Without dead ends: 74 [2022-03-19 04:59:32,750 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-19 04:59:32,750 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:59:32,751 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 141 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:59:32,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-19 04:59:32,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 71. [2022-03-19 04:59:32,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 40 states have (on average 1.175) internal successors, (47), 43 states have internal predecessors, (47), 22 states have call successors, (22), 9 states have call predecessors, (22), 8 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-19 04:59:32,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2022-03-19 04:59:32,768 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 55 [2022-03-19 04:59:32,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:59:32,769 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2022-03-19 04:59:32,769 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 04:59:32,769 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2022-03-19 04:59:32,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-19 04:59:32,770 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:59:32,770 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 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] [2022-03-19 04:59:32,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 04:59:32,983 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:59:32,983 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:59:32,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:59:32,984 INFO L85 PathProgramCache]: Analyzing trace with hash -682689219, now seen corresponding path program 1 times [2022-03-19 04:59:32,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:59:32,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [669119230] [2022-03-19 04:59:32,984 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:59:32,985 INFO L85 PathProgramCache]: Analyzing trace with hash -682689219, now seen corresponding path program 2 times [2022-03-19 04:59:32,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:59:32,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151740990] [2022-03-19 04:59:32,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:59:32,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:59:33,005 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:59:33,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [245471300] [2022-03-19 04:59:33,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:59:33,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:59:33,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:59:33,007 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 04:59:33,020 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 04:59:33,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:59:33,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:59:33,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 04:59:33,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:59:33,217 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-19 04:59:33,217 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 04:59:33,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:59:33,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151740990] [2022-03-19 04:59:33,218 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:59:33,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245471300] [2022-03-19 04:59:33,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245471300] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:59:33,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:59:33,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 04:59:33,218 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:59:33,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [669119230] [2022-03-19 04:59:33,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [669119230] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:59:33,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:59:33,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 04:59:33,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833634924] [2022-03-19 04:59:33,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:59:33,219 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 04:59:33,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:59:33,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 04:59:33,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 04:59:33,220 INFO L87 Difference]: Start difference. First operand 71 states and 88 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, (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 04:59:33,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:59:33,269 INFO L93 Difference]: Finished difference Result 79 states and 96 transitions. [2022-03-19 04:59:33,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 04:59:33,269 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, (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 56 [2022-03-19 04:59:33,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:59:33,271 INFO L225 Difference]: With dead ends: 79 [2022-03-19 04:59:33,272 INFO L226 Difference]: Without dead ends: 72 [2022-03-19 04:59:33,272 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 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 04:59:33,272 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 8 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 04:59:33,273 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 132 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 04:59:33,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-19 04:59:33,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2022-03-19 04:59:33,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 41 states have (on average 1.146341463414634) internal successors, (47), 44 states have internal predecessors, (47), 20 states have call successors, (20), 10 states have call predecessors, (20), 9 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-19 04:59:33,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2022-03-19 04:59:33,285 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 56 [2022-03-19 04:59:33,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:59:33,286 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2022-03-19 04:59:33,286 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, (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 04:59:33,286 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2022-03-19 04:59:33,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-19 04:59:33,287 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:59:33,287 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:59:33,316 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 04:59:33,504 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:59:33,505 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:59:33,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:59:33,505 INFO L85 PathProgramCache]: Analyzing trace with hash 680531353, now seen corresponding path program 1 times [2022-03-19 04:59:33,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:59:33,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1051319209] [2022-03-19 04:59:33,506 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:59:33,506 INFO L85 PathProgramCache]: Analyzing trace with hash 680531353, now seen corresponding path program 2 times [2022-03-19 04:59:33,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:59:33,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324379982] [2022-03-19 04:59:33,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:59:33,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:59:33,525 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:59:33,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1427991048] [2022-03-19 04:59:33,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:59:33,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:59:33,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:59:33,528 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 04:59:33,530 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 04:59:33,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:59:33,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:59:33,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-19 04:59:33,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:59:34,320 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-03-19 04:59:34,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:59:36,798 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-03-19 04:59:36,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:59:36,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324379982] [2022-03-19 04:59:36,798 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:59:36,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427991048] [2022-03-19 04:59:36,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427991048] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:59:36,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:59:36,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-03-19 04:59:36,799 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:59:36,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1051319209] [2022-03-19 04:59:36,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1051319209] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:59:36,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:59:36,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 04:59:36,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367653602] [2022-03-19 04:59:36,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:59:36,800 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 04:59:36,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:59:36,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 04:59:36,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-19 04:59:36,801 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-19 04:59:37,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:59:37,039 INFO L93 Difference]: Finished difference Result 135 states and 165 transitions. [2022-03-19 04:59:37,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 04:59:37,040 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 75 [2022-03-19 04:59:37,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:59:37,042 INFO L225 Difference]: With dead ends: 135 [2022-03-19 04:59:37,042 INFO L226 Difference]: Without dead ends: 108 [2022-03-19 04:59:37,042 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-03-19 04:59:37,044 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 10 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 04:59:37,045 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 326 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 04:59:37,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-19 04:59:37,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2022-03-19 04:59:37,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 64 states have (on average 1.140625) internal successors, (73), 67 states have internal predecessors, (73), 27 states have call successors, (27), 15 states have call predecessors, (27), 14 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-19 04:59:37,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 125 transitions. [2022-03-19 04:59:37,070 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 125 transitions. Word has length 75 [2022-03-19 04:59:37,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:59:37,070 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 125 transitions. [2022-03-19 04:59:37,070 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-19 04:59:37,071 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 125 transitions. [2022-03-19 04:59:37,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-19 04:59:37,073 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:59:37,073 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:59:37,100 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 04:59:37,274 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:59:37,274 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:59:37,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:59:37,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1566820819, now seen corresponding path program 3 times [2022-03-19 04:59:37,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:59:37,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1402325400] [2022-03-19 04:59:37,275 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:59:37,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1566820819, now seen corresponding path program 4 times [2022-03-19 04:59:37,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:59:37,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406374920] [2022-03-19 04:59:37,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:59:37,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:59:37,284 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:59:37,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [453674687] [2022-03-19 04:59:37,284 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 04:59:37,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:59:37,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:59:37,285 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 04:59:37,286 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 04:59:37,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 04:59:37,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:59:37,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-19 04:59:37,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:59:37,617 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-03-19 04:59:37,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:59:39,791 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-03-19 04:59:39,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:59:39,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406374920] [2022-03-19 04:59:39,791 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:59:39,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453674687] [2022-03-19 04:59:39,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453674687] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:59:39,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:59:39,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2022-03-19 04:59:39,792 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:59:39,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1402325400] [2022-03-19 04:59:39,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1402325400] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:59:39,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:59:39,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 04:59:39,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423144826] [2022-03-19 04:59:39,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:59:39,793 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 04:59:39,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:59:39,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 04:59:39,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-19 04:59:39,794 INFO L87 Difference]: Start difference. First operand 106 states and 125 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-19 04:59:39,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:59:39,956 INFO L93 Difference]: Finished difference Result 133 states and 159 transitions. [2022-03-19 04:59:39,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 04:59:39,957 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 80 [2022-03-19 04:59:39,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:59:39,960 INFO L225 Difference]: With dead ends: 133 [2022-03-19 04:59:39,960 INFO L226 Difference]: Without dead ends: 110 [2022-03-19 04:59:39,960 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-03-19 04:59:39,961 INFO L912 BasicCegarLoop]: 53 mSDtfsCounter, 11 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 04:59:39,961 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 265 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 04:59:39,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-19 04:59:39,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-03-19 04:59:39,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 66 states have (on average 1.106060606060606) internal successors, (73), 70 states have internal predecessors, (73), 28 states have call successors, (28), 16 states have call predecessors, (28), 15 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-19 04:59:39,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 126 transitions. [2022-03-19 04:59:39,983 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 126 transitions. Word has length 80 [2022-03-19 04:59:39,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:59:39,983 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 126 transitions. [2022-03-19 04:59:39,983 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-19 04:59:39,984 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 126 transitions. [2022-03-19 04:59:39,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-19 04:59:39,984 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:59:39,985 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:59:40,010 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 04:59:40,207 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:59:40,208 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:59:40,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:59:40,208 INFO L85 PathProgramCache]: Analyzing trace with hash -815356955, now seen corresponding path program 1 times [2022-03-19 04:59:40,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:59:40,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [379260664] [2022-03-19 04:59:40,209 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:59:40,209 INFO L85 PathProgramCache]: Analyzing trace with hash -815356955, now seen corresponding path program 2 times [2022-03-19 04:59:40,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:59:40,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319741418] [2022-03-19 04:59:40,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:59:40,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:59:40,217 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:59:40,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [736353647] [2022-03-19 04:59:40,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 04:59:40,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:59:40,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:59:40,219 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 04:59:40,220 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 04:59:40,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 04:59:40,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:59:40,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-19 04:59:40,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 04:59:41,422 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 45 proven. 32 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-19 04:59:41,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 04:59:56,688 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 45 proven. 32 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-19 04:59:56,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 04:59:56,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319741418] [2022-03-19 04:59:56,689 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 04:59:56,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736353647] [2022-03-19 04:59:56,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736353647] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 04:59:56,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 04:59:56,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2022-03-19 04:59:56,689 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 04:59:56,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [379260664] [2022-03-19 04:59:56,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [379260664] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 04:59:56,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 04:59:56,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 04:59:56,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971588959] [2022-03-19 04:59:56,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 04:59:56,690 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 04:59:56,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 04:59:56,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 04:59:56,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-03-19 04:59:56,691 INFO L87 Difference]: Start difference. First operand 110 states and 126 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-19 04:59:57,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 04:59:57,892 INFO L93 Difference]: Finished difference Result 116 states and 131 transitions. [2022-03-19 04:59:57,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 04:59:57,893 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 86 [2022-03-19 04:59:57,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 04:59:57,894 INFO L225 Difference]: With dead ends: 116 [2022-03-19 04:59:57,894 INFO L226 Difference]: Without dead ends: 88 [2022-03-19 04:59:57,895 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 149 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2022-03-19 04:59:57,895 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 17 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 04:59:57,895 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 342 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 04:59:57,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-19 04:59:57,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-03-19 04:59:57,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 55 states have internal predecessors, (58), 23 states have call successors, (23), 13 states have call predecessors, (23), 12 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-19 04:59:57,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 102 transitions. [2022-03-19 04:59:57,903 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 102 transitions. Word has length 86 [2022-03-19 04:59:57,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 04:59:57,903 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 102 transitions. [2022-03-19 04:59:57,904 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-19 04:59:57,904 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 102 transitions. [2022-03-19 04:59:57,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-19 04:59:57,904 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 04:59:57,905 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 04:59:57,924 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 04:59:58,109 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:59:58,109 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 04:59:58,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 04:59:58,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1885636697, now seen corresponding path program 5 times [2022-03-19 04:59:58,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 04:59:58,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1662974614] [2022-03-19 04:59:58,110 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 04:59:58,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1885636697, now seen corresponding path program 6 times [2022-03-19 04:59:58,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 04:59:58,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132269285] [2022-03-19 04:59:58,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 04:59:58,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 04:59:58,118 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 04:59:58,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [30909141] [2022-03-19 04:59:58,118 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 04:59:58,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 04:59:58,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 04:59:58,119 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 04:59:58,139 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 04:59:58,175 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-19 04:59:58,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 04:59:58,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-19 04:59:58,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:00:13,033 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 55 proven. 9 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-03-19 05:00:13,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:01:00,730 WARN L232 SmtUtils]: Spent 29.08s on a formula simplification that was a NOOP. DAG size: 51 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 05:02:03,474 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 45 proven. 19 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-03-19 05:02:03,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:02:03,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132269285] [2022-03-19 05:02:03,474 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:02:03,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30909141] [2022-03-19 05:02:03,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30909141] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:02:03,475 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:02:03,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2022-03-19 05:02:03,475 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:02:03,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1662974614] [2022-03-19 05:02:03,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1662974614] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:02:03,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:02:03,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 05:02:03,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771053811] [2022-03-19 05:02:03,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:02:03,476 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 05:02:03,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:02:03,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 05:02:03,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=162, Unknown=2, NotChecked=0, Total=210 [2022-03-19 05:02:03,476 INFO L87 Difference]: Start difference. First operand 88 states and 102 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-19 05:02:05,488 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 05:02:07,775 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 05:02:09,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:02:09,086 INFO L93 Difference]: Finished difference Result 112 states and 130 transitions. [2022-03-19 05:02:09,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 05:02:09,087 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 92 [2022-03-19 05:02:09,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:02:09,088 INFO L225 Difference]: With dead ends: 112 [2022-03-19 05:02:09,088 INFO L226 Difference]: Without dead ends: 100 [2022-03-19 05:02:09,088 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 167 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 37.8s TimeCoverageRelationStatistics Valid=59, Invalid=211, Unknown=2, NotChecked=0, Total=272 [2022-03-19 05:02:09,089 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 25 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 24 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-03-19 05:02:09,089 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 260 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 210 Invalid, 2 Unknown, 0 Unchecked, 4.5s Time] [2022-03-19 05:02:09,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-19 05:02:09,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2022-03-19 05:02:09,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 59 states have (on average 1.11864406779661) internal successors, (66), 63 states have internal predecessors, (66), 26 states have call successors, (26), 14 states have call predecessors, (26), 13 states have return successors, (24), 21 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-19 05:02:09,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 116 transitions. [2022-03-19 05:02:09,101 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 116 transitions. Word has length 92 [2022-03-19 05:02:09,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:02:09,102 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 116 transitions. [2022-03-19 05:02:09,102 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-19 05:02:09,102 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 116 transitions. [2022-03-19 05:02:09,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-19 05:02:09,103 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:02:09,103 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:02:09,124 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 05:02:09,315 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,SelfDestructingSolverStorable10 [2022-03-19 05:02:09,316 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:02:09,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:02:09,316 INFO L85 PathProgramCache]: Analyzing trace with hash -278824083, now seen corresponding path program 7 times [2022-03-19 05:02:09,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:02:09,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [582399592] [2022-03-19 05:02:09,332 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:02:09,333 INFO L85 PathProgramCache]: Analyzing trace with hash -278824083, now seen corresponding path program 8 times [2022-03-19 05:02:09,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:02:09,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768658478] [2022-03-19 05:02:09,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:02:09,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:02:09,355 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:02:09,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1500878395] [2022-03-19 05:02:09,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 05:02:09,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:02:09,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:02:09,367 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 05:02:09,369 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 05:02:09,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 05:02:09,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:02:09,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-19 05:02:09,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:02:09,908 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 24 proven. 18 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-03-19 05:02:09,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:02:12,439 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 24 proven. 18 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-03-19 05:02:12,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:02:12,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768658478] [2022-03-19 05:02:12,439 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:02:12,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500878395] [2022-03-19 05:02:12,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500878395] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:02:12,439 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:02:12,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-03-19 05:02:12,440 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:02:12,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [582399592] [2022-03-19 05:02:12,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [582399592] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:02:12,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:02:12,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 05:02:12,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737846278] [2022-03-19 05:02:12,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:02:12,440 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 05:02:12,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:02:12,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 05:02:12,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-03-19 05:02:12,441 INFO L87 Difference]: Start difference. First operand 99 states and 116 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-19 05:02:12,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:02:12,674 INFO L93 Difference]: Finished difference Result 177 states and 223 transitions. [2022-03-19 05:02:12,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 05:02:12,674 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 97 [2022-03-19 05:02:12,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:02:12,675 INFO L225 Difference]: With dead ends: 177 [2022-03-19 05:02:12,675 INFO L226 Difference]: Without dead ends: 138 [2022-03-19 05:02:12,676 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 180 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-03-19 05:02:12,677 INFO L912 BasicCegarLoop]: 62 mSDtfsCounter, 13 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 05:02:12,679 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 400 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 05:02:12,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-03-19 05:02:12,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2022-03-19 05:02:12,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 82 states have (on average 1.1219512195121952) internal successors, (92), 88 states have internal predecessors, (92), 39 states have call successors, (39), 17 states have call predecessors, (39), 16 states have return successors, (36), 32 states have call predecessors, (36), 36 states have call successors, (36) [2022-03-19 05:02:12,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 167 transitions. [2022-03-19 05:02:12,697 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 167 transitions. Word has length 97 [2022-03-19 05:02:12,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:02:12,698 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 167 transitions. [2022-03-19 05:02:12,698 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-19 05:02:12,698 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 167 transitions. [2022-03-19 05:02:12,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-19 05:02:12,699 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:02:12,699 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:02:12,716 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 05:02:12,903 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:02:12,903 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:02:12,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:02:12,904 INFO L85 PathProgramCache]: Analyzing trace with hash -367001023, now seen corresponding path program 9 times [2022-03-19 05:02:12,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:02:12,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1797212529] [2022-03-19 05:02:12,904 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:02:12,904 INFO L85 PathProgramCache]: Analyzing trace with hash -367001023, now seen corresponding path program 10 times [2022-03-19 05:02:12,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:02:12,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143589596] [2022-03-19 05:02:12,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:02:12,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:02:12,912 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:02:12,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [278464276] [2022-03-19 05:02:12,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 05:02:12,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:02:12,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:02:12,916 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 05:02:12,918 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 05:02:12,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 05:02:12,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:02:12,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-19 05:02:12,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:02:14,461 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 58 proven. 28 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-03-19 05:02:14,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:03:02,056 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 58 proven. 28 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-03-19 05:03:02,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:03:02,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143589596] [2022-03-19 05:03:02,056 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:03:02,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278464276] [2022-03-19 05:03:02,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278464276] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:03:02,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:03:02,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2022-03-19 05:03:02,057 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:03:02,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1797212529] [2022-03-19 05:03:02,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1797212529] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:03:02,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:03:02,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 05:03:02,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989353177] [2022-03-19 05:03:02,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:03:02,057 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 05:03:02,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:03:02,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 05:03:02,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2022-03-19 05:03:02,058 INFO L87 Difference]: Start difference. First operand 138 states and 167 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) [2022-03-19 05:03:03,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:03:03,476 INFO L93 Difference]: Finished difference Result 184 states and 208 transitions. [2022-03-19 05:03:03,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 05:03:03,476 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) Word has length 105 [2022-03-19 05:03:03,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:03:03,477 INFO L225 Difference]: With dead ends: 184 [2022-03-19 05:03:03,477 INFO L226 Difference]: Without dead ends: 147 [2022-03-19 05:03:03,478 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 185 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2022-03-19 05:03:03,479 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 17 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 05:03:03,479 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 511 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 05:03:03,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-03-19 05:03:03,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2022-03-19 05:03:03,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 90 states have (on average 1.0888888888888888) internal successors, (98), 95 states have internal predecessors, (98), 36 states have call successors, (36), 21 states have call predecessors, (36), 20 states have return successors, (33), 30 states have call predecessors, (33), 33 states have call successors, (33) [2022-03-19 05:03:03,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 167 transitions. [2022-03-19 05:03:03,499 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 167 transitions. Word has length 105 [2022-03-19 05:03:03,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:03:03,499 INFO L478 AbstractCegarLoop]: Abstraction has 147 states and 167 transitions. [2022-03-19 05:03:03,499 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) [2022-03-19 05:03:03,499 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 167 transitions. [2022-03-19 05:03:03,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-03-19 05:03:03,500 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:03:03,500 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:03:03,519 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 05:03:03,707 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,SelfDestructingSolverStorable12 [2022-03-19 05:03:03,707 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:03:03,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:03:03,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1683530195, now seen corresponding path program 11 times [2022-03-19 05:03:03,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:03:03,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1355203691] [2022-03-19 05:03:03,708 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:03:03,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1683530195, now seen corresponding path program 12 times [2022-03-19 05:03:03,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:03:03,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749304125] [2022-03-19 05:03:03,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:03:03,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:03:03,716 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:03:03,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [351477360] [2022-03-19 05:03:03,716 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 05:03:03,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:03:03,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:03:03,718 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 05:03:03,719 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 05:03:03,785 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 05:03:03,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:03:03,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-19 05:03:03,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:03:04,254 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 96 proven. 4 refuted. 0 times theorem prover too weak. 395 trivial. 0 not checked. [2022-03-19 05:03:04,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:03:04,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:03:04,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749304125] [2022-03-19 05:03:04,623 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:03:04,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351477360] [2022-03-19 05:03:04,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351477360] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 05:03:04,623 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 05:03:04,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-19 05:03:04,623 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:03:04,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1355203691] [2022-03-19 05:03:04,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1355203691] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:03:04,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:03:04,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 05:03:04,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758765327] [2022-03-19 05:03:04,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:03:04,624 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 05:03:04,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:03:04,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 05:03:04,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-03-19 05:03:04,625 INFO L87 Difference]: Start difference. First operand 147 states and 167 transitions. Second operand has 11 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-03-19 05:03:05,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:03:05,137 INFO L93 Difference]: Finished difference Result 168 states and 190 transitions. [2022-03-19 05:03:05,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 05:03:05,138 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 114 [2022-03-19 05:03:05,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:03:05,139 INFO L225 Difference]: With dead ends: 168 [2022-03-19 05:03:05,139 INFO L226 Difference]: Without dead ends: 156 [2022-03-19 05:03:05,140 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 105 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-03-19 05:03:05,140 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 20 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 05:03:05,141 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 288 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 215 Invalid, 0 Unknown, 39 Unchecked, 0.4s Time] [2022-03-19 05:03:05,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-03-19 05:03:05,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2022-03-19 05:03:05,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 95 states have (on average 1.0842105263157895) internal successors, (103), 100 states have internal predecessors, (103), 38 states have call successors, (38), 22 states have call predecessors, (38), 21 states have return successors, (35), 32 states have call predecessors, (35), 35 states have call successors, (35) [2022-03-19 05:03:05,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 176 transitions. [2022-03-19 05:03:05,166 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 176 transitions. Word has length 114 [2022-03-19 05:03:05,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:03:05,167 INFO L478 AbstractCegarLoop]: Abstraction has 155 states and 176 transitions. [2022-03-19 05:03:05,168 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-03-19 05:03:05,168 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 176 transitions. [2022-03-19 05:03:05,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-19 05:03:05,170 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:03:05,170 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:03:05,197 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 05:03:05,387 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,SelfDestructingSolverStorable13 [2022-03-19 05:03:05,387 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:03:05,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:03:05,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1619018179, now seen corresponding path program 3 times [2022-03-19 05:03:05,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:03:05,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [734244134] [2022-03-19 05:03:05,388 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:03:05,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1619018179, now seen corresponding path program 4 times [2022-03-19 05:03:05,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:03:05,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881519696] [2022-03-19 05:03:05,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:03:05,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:03:05,395 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:03:05,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [405570810] [2022-03-19 05:03:05,396 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 05:03:05,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:03:05,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:03:05,397 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 05:03:05,400 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 05:03:05,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 05:03:05,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:03:05,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-19 05:03:05,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:03:06,232 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 05:03:06,358 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 71 proven. 29 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2022-03-19 05:03:06,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:03:06,451 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 05:03:16,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:03:16,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881519696] [2022-03-19 05:03:16,737 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:03:16,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405570810] [2022-03-19 05:03:16,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405570810] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 05:03:16,737 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 05:03:16,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-03-19 05:03:16,737 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:03:16,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [734244134] [2022-03-19 05:03:16,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [734244134] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:03:16,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:03:16,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 05:03:16,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694533128] [2022-03-19 05:03:16,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:03:16,738 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 05:03:16,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:03:16,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 05:03:16,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2022-03-19 05:03:16,739 INFO L87 Difference]: Start difference. First operand 155 states and 176 transitions. Second operand has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-19 05:03:18,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:03:18,037 INFO L93 Difference]: Finished difference Result 161 states and 181 transitions. [2022-03-19 05:03:18,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 05:03:18,038 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) Word has length 116 [2022-03-19 05:03:18,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:03:18,039 INFO L225 Difference]: With dead ends: 161 [2022-03-19 05:03:18,039 INFO L226 Difference]: Without dead ends: 124 [2022-03-19 05:03:18,040 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=160, Invalid=596, Unknown=0, NotChecked=0, Total=756 [2022-03-19 05:03:18,040 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 15 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-19 05:03:18,041 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 438 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-19 05:03:18,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-03-19 05:03:18,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-03-19 05:03:18,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 75 states have (on average 1.0933333333333333) internal successors, (82), 79 states have internal predecessors, (82), 31 states have call successors, (31), 18 states have call predecessors, (31), 17 states have return successors, (29), 26 states have call predecessors, (29), 29 states have call successors, (29) [2022-03-19 05:03:18,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 142 transitions. [2022-03-19 05:03:18,057 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 142 transitions. Word has length 116 [2022-03-19 05:03:18,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:03:18,057 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 142 transitions. [2022-03-19 05:03:18,057 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-19 05:03:18,057 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 142 transitions. [2022-03-19 05:03:18,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-03-19 05:03:18,058 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:03:18,058 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:03:18,083 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 05:03:18,275 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,SelfDestructingSolverStorable14 [2022-03-19 05:03:18,275 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:03:18,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:03:18,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1921791003, now seen corresponding path program 5 times [2022-03-19 05:03:18,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:03:18,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1474400993] [2022-03-19 05:03:18,276 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:03:18,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1921791003, now seen corresponding path program 6 times [2022-03-19 05:03:18,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:03:18,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121698080] [2022-03-19 05:03:18,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:03:18,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:03:18,291 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:03:18,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [19415542] [2022-03-19 05:03:18,291 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 05:03:18,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:03:18,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:03:18,295 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 05:03:18,297 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 05:03:18,364 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 05:03:18,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:03:18,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 05:03:18,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:03:18,654 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 62 proven. 4 refuted. 0 times theorem prover too weak. 492 trivial. 0 not checked. [2022-03-19 05:03:18,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:03:18,912 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 57 proven. 4 refuted. 0 times theorem prover too weak. 497 trivial. 0 not checked. [2022-03-19 05:03:18,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:03:18,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121698080] [2022-03-19 05:03:18,913 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:03:18,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19415542] [2022-03-19 05:03:18,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19415542] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:03:18,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:03:18,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2022-03-19 05:03:18,913 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:03:18,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1474400993] [2022-03-19 05:03:18,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1474400993] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:03:18,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:03:18,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 05:03:18,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581794904] [2022-03-19 05:03:18,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:03:18,914 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 05:03:18,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:03:18,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 05:03:18,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-03-19 05:03:18,914 INFO L87 Difference]: Start difference. First operand 124 states and 142 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2022-03-19 05:03:19,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:03:19,021 INFO L93 Difference]: Finished difference Result 150 states and 178 transitions. [2022-03-19 05:03:19,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 05:03:19,021 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) Word has length 120 [2022-03-19 05:03:19,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:03:19,023 INFO L225 Difference]: With dead ends: 150 [2022-03-19 05:03:19,023 INFO L226 Difference]: Without dead ends: 137 [2022-03-19 05:03:19,023 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 230 SyntacticMatches, 5 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-03-19 05:03:19,023 INFO L912 BasicCegarLoop]: 66 mSDtfsCounter, 20 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 05:03:19,024 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 112 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 05:03:19,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-03-19 05:03:19,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-03-19 05:03:19,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 83 states have (on average 1.108433734939759) internal successors, (92), 87 states have internal predecessors, (92), 36 states have call successors, (36), 18 states have call predecessors, (36), 17 states have return successors, (34), 31 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-19 05:03:19,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 162 transitions. [2022-03-19 05:03:19,041 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 162 transitions. Word has length 120 [2022-03-19 05:03:19,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:03:19,041 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 162 transitions. [2022-03-19 05:03:19,041 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2022-03-19 05:03:19,041 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 162 transitions. [2022-03-19 05:03:19,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-03-19 05:03:19,042 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:03:19,042 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:03:19,066 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 05:03:19,259 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,SelfDestructingSolverStorable15 [2022-03-19 05:03:19,260 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:03:19,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:03:19,260 INFO L85 PathProgramCache]: Analyzing trace with hash 515319041, now seen corresponding path program 13 times [2022-03-19 05:03:19,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:03:19,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [179634131] [2022-03-19 05:03:19,260 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:03:19,261 INFO L85 PathProgramCache]: Analyzing trace with hash 515319041, now seen corresponding path program 14 times [2022-03-19 05:03:19,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:03:19,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797930404] [2022-03-19 05:03:19,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:03:19,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:03:19,274 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:03:19,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [712025318] [2022-03-19 05:03:19,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 05:03:19,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:03:19,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:03:19,276 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 05:03:19,277 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 05:03:19,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 05:03:19,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:03:19,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-19 05:03:19,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:03:20,458 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 32 proven. 45 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2022-03-19 05:03:20,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:04:10,527 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 32 proven. 39 refuted. 0 times theorem prover too weak. 492 trivial. 0 not checked. [2022-03-19 05:04:10,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:04:10,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797930404] [2022-03-19 05:04:10,527 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:04:10,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712025318] [2022-03-19 05:04:10,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712025318] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:04:10,528 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:04:10,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 25 [2022-03-19 05:04:10,528 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:04:10,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [179634131] [2022-03-19 05:04:10,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [179634131] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:04:10,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:04:10,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 05:04:10,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174756027] [2022-03-19 05:04:10,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:04:10,528 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 05:04:10,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:04:10,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 05:04:10,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2022-03-19 05:04:10,529 INFO L87 Difference]: Start difference. First operand 137 states and 162 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2022-03-19 05:04:11,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:04:11,446 INFO L93 Difference]: Finished difference Result 241 states and 293 transitions. [2022-03-19 05:04:11,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 05:04:11,447 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) Word has length 122 [2022-03-19 05:04:11,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:04:11,449 INFO L225 Difference]: With dead ends: 241 [2022-03-19 05:04:11,449 INFO L226 Difference]: Without dead ends: 195 [2022-03-19 05:04:11,450 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 219 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2022-03-19 05:04:11,450 INFO L912 BasicCegarLoop]: 55 mSDtfsCounter, 30 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 05:04:11,450 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 519 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 05:04:11,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-03-19 05:04:11,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 192. [2022-03-19 05:04:11,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 118 states have (on average 1.1101694915254237) internal successors, (131), 123 states have internal predecessors, (131), 49 states have call successors, (49), 25 states have call predecessors, (49), 24 states have return successors, (47), 43 states have call predecessors, (47), 47 states have call successors, (47) [2022-03-19 05:04:11,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 227 transitions. [2022-03-19 05:04:11,477 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 227 transitions. Word has length 122 [2022-03-19 05:04:11,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:04:11,477 INFO L478 AbstractCegarLoop]: Abstraction has 192 states and 227 transitions. [2022-03-19 05:04:11,477 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2022-03-19 05:04:11,477 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 227 transitions. [2022-03-19 05:04:11,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-19 05:04:11,478 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:04:11,479 INFO L500 BasicCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 4, 4, 4, 4, 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] [2022-03-19 05:04:11,512 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 05:04:11,707 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:04:11,708 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:04:11,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:04:11,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1224833083, now seen corresponding path program 15 times [2022-03-19 05:04:11,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:04:11,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [169230107] [2022-03-19 05:04:11,708 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:04:11,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1224833083, now seen corresponding path program 16 times [2022-03-19 05:04:11,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:04:11,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002885657] [2022-03-19 05:04:11,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:04:11,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:04:11,715 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:04:11,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2008636721] [2022-03-19 05:04:11,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 05:04:11,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:04:11,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:04:11,717 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 05:04:11,717 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 05:04:11,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 05:04:11,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:04:11,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-19 05:04:11,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:04:12,656 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 34 proven. 47 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2022-03-19 05:04:12,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:04:32,687 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 34 proven. 41 refuted. 0 times theorem prover too weak. 556 trivial. 0 not checked. [2022-03-19 05:04:32,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:04:32,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002885657] [2022-03-19 05:04:32,688 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:04:32,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008636721] [2022-03-19 05:04:32,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008636721] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:04:32,688 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:04:32,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 25 [2022-03-19 05:04:32,688 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:04:32,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [169230107] [2022-03-19 05:04:32,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [169230107] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:04:32,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:04:32,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 05:04:32,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764037975] [2022-03-19 05:04:32,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:04:32,688 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 05:04:32,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:04:32,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 05:04:32,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2022-03-19 05:04:32,689 INFO L87 Difference]: Start difference. First operand 192 states and 227 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 9 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 05:04:33,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:04:33,697 INFO L93 Difference]: Finished difference Result 238 states and 285 transitions. [2022-03-19 05:04:33,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 05:04:33,698 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 9 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 05:04:33,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:04:33,699 INFO L225 Difference]: With dead ends: 238 [2022-03-19 05:04:33,699 INFO L226 Difference]: Without dead ends: 209 [2022-03-19 05:04:33,700 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 229 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=255, Invalid=1005, Unknown=0, NotChecked=0, Total=1260 [2022-03-19 05:04:33,700 INFO L912 BasicCegarLoop]: 68 mSDtfsCounter, 33 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 05:04:33,701 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 699 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 05:04:33,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-03-19 05:04:33,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 207. [2022-03-19 05:04:33,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 128 states have (on average 1.1015625) internal successors, (141), 135 states have internal predecessors, (141), 52 states have call successors, (52), 27 states have call predecessors, (52), 26 states have return successors, (49), 44 states have call predecessors, (49), 49 states have call successors, (49) [2022-03-19 05:04:33,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 242 transitions. [2022-03-19 05:04:33,730 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 242 transitions. Word has length 127 [2022-03-19 05:04:33,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:04:33,730 INFO L478 AbstractCegarLoop]: Abstraction has 207 states and 242 transitions. [2022-03-19 05:04:33,730 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 9 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 05:04:33,730 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 242 transitions. [2022-03-19 05:04:33,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-19 05:04:33,731 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:04:33,731 INFO L500 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:04:33,758 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 05:04:33,953 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,SelfDestructingSolverStorable17 [2022-03-19 05:04:33,953 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:04:33,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:04:33,954 INFO L85 PathProgramCache]: Analyzing trace with hash -243845479, now seen corresponding path program 17 times [2022-03-19 05:04:33,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:04:33,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1567557348] [2022-03-19 05:04:33,954 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:04:33,954 INFO L85 PathProgramCache]: Analyzing trace with hash -243845479, now seen corresponding path program 18 times [2022-03-19 05:04:33,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:04:33,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274212249] [2022-03-19 05:04:33,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:04:33,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:04:33,966 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:04:33,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [618739179] [2022-03-19 05:04:33,966 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 05:04:33,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:04:33,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:04:33,967 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 05:04:33,968 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 05:04:34,231 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-19 05:04:34,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:04:34,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-19 05:04:34,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:05:24,340 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 134 proven. 50 refuted. 0 times theorem prover too weak. 527 trivial. 0 not checked. [2022-03-19 05:05:24,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:06:14,124 WARN L232 SmtUtils]: Spent 23.87s on a formula simplification that was a NOOP. DAG size: 59 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 05:07:27,467 WARN L232 SmtUtils]: Spent 24.08s on a formula simplification that was a NOOP. DAG size: 61 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 05:09:01,216 WARN L232 SmtUtils]: Spent 46.99s on a formula simplification that was a NOOP. DAG size: 133 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 05:10:50,644 WARN L833 $PredicateComparison]: unable to prove that (or (= c_main_~p~0 1) (let ((.cse16 (mod c_main_~B~0 4294967296)) (.cse19 (div c_main_~p~0 2)) (.cse22 (< c_main_~d~0 0)) (.cse4 (= (mod c_main_~d~0 2) 0)) (.cse2 (div c_main_~d~0 2))) (let ((.cse3 (+ .cse2 1)) (.cse0 (and .cse22 (not .cse4))) (.cse6 (mod c_main_~A~0 4294967296)) (.cse9 (* (- 1) c_main_~d~0)) (.cse17 (* .cse16 .cse19)) (.cse5 (= (mod c_main_~p~0 2) 0)) (.cse21 (< c_main_~p~0 0))) (and (let ((.cse20 (+ .cse19 1))) (let ((.cse1 (* .cse20 .cse16))) (or (and (or .cse0 (not (= .cse1 .cse2))) (or (not (= .cse3 .cse1)) .cse4)) .cse5 (let ((.cse18 (div .cse20 2)) (.cse11 (= (mod .cse20 2) 0))) (let ((.cse12 (not .cse11)) (.cse13 (* (+ c_main_~q~0 .cse18 c_main_~p~0 .cse19 1) .cse16)) (.cse7 (* (- 1) (div .cse1 2))) (.cse8 (* (+ c_main_~q~0 .cse18 2 c_main_~p~0 .cse19) .cse16)) (.cse10 (* (- 1) .cse1)) (.cse15 (div (+ .cse16 .cse17) 2)) (.cse14 (= (mod .cse1 2) 0))) (and (or (and (or (= .cse6 (+ .cse7 .cse8 .cse9 c_main_~r~0 .cse10)) .cse11) (or .cse12 (= (+ .cse7 .cse13 .cse9 c_main_~r~0 .cse10) .cse6))) (not .cse14) (not (<= (+ c_main_~d~0 .cse15 .cse16 .cse17) c_main_~r~0))) (or (and (or .cse12 (= .cse6 (+ (- 1) .cse7 .cse13 .cse9 c_main_~r~0 .cse10))) (or (= (+ (- 1) .cse7 .cse8 .cse9 c_main_~r~0 .cse10) .cse6) .cse11)) (not (<= (+ c_main_~d~0 .cse15 .cse16 .cse17 1) c_main_~r~0)) .cse14)))) (not .cse21)))) (or (= .cse19 1) (and (or (not (= .cse3 .cse17)) .cse4 (not .cse22)) (or .cse0 (not (= .cse2 .cse17)))) (let ((.cse30 (div .cse17 2)) (.cse33 (div .cse19 2)) (.cse24 (= (mod .cse19 2) 0))) (let ((.cse23 (= (mod .cse17 2) 0)) (.cse31 (< .cse17 0)) (.cse29 (not .cse24)) (.cse28 (* (+ c_main_~q~0 c_main_~p~0 .cse19 .cse33) .cse16)) (.cse25 (* (- 1) .cse30)) (.cse26 (* (- 1) .cse17)) (.cse27 (* .cse16 (+ c_main_~q~0 c_main_~p~0 .cse19 .cse33 1)))) (and (or .cse23 (and (or .cse24 (= (+ (- 1) .cse25 .cse26 .cse9 c_main_~r~0 .cse27) .cse6)) (or (= .cse6 (+ (- 1) .cse25 .cse26 .cse9 .cse28 c_main_~r~0)) .cse29)) (not (<= (+ c_main_~d~0 .cse17 1 .cse30) c_main_~r~0)) (not .cse31)) (or (and (not .cse23) .cse31) (let ((.cse32 (< .cse19 0))) (and (or (and .cse29 .cse32) (= .cse6 (+ .cse25 .cse26 .cse9 .cse28 c_main_~r~0))) (or (not .cse32) (= .cse6 (+ .cse25 .cse26 .cse9 c_main_~r~0 .cse27)) .cse24))) (not (<= (+ c_main_~d~0 .cse17 .cse30) c_main_~r~0)))))) (and (not .cse5) .cse21)))))) is different from false