/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/array-programs/partial_mod_count_2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 09:18:20,155 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 09:18:20,156 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 09:18:20,196 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 09:18:20,213 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 09:18:20,214 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 09:18:20,214 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 09:18:20,215 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 09:18:20,215 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 09:18:20,216 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 09:18:20,217 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 09:18:20,218 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 09:18:20,219 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 09:18:20,225 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 09:18:20,227 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 09:18:20,228 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 09:18:20,235 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 09:18:20,241 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 09:18:20,242 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 09:18:20,242 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 09:18:20,243 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 09:18:20,254 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 09:18:20,254 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 09:18:20,255 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 09:18:20,256 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 09:18:20,256 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 09:18:20,256 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 09:18:20,256 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 09:18:20,256 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 09:18:20,256 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 09:18:20,256 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 09:18:20,257 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 09:18:20,257 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 09:18:20,257 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 09:18:20,257 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 09:18:20,257 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 09:18:20,257 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 09:18:20,257 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 09:18:20,257 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 09:18:20,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 09:18:20,257 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 09:18:20,258 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 09:18:20,258 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 09:18:20,258 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 09:18:20,462 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 09:18:20,484 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 09:18:20,486 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 09:18:20,487 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 09:18:20,487 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 09:18:20,488 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-programs/partial_mod_count_2.c [2022-01-31 09:18:20,536 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a28312db9/24ce9f32070442d98d9cd2f465115a43/FLAG4539eb5f6 [2022-01-31 09:18:20,837 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 09:18:20,837 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-programs/partial_mod_count_2.c [2022-01-31 09:18:20,850 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a28312db9/24ce9f32070442d98d9cd2f465115a43/FLAG4539eb5f6 [2022-01-31 09:18:21,267 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a28312db9/24ce9f32070442d98d9cd2f465115a43 [2022-01-31 09:18:21,269 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 09:18:21,270 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 09:18:21,276 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 09:18:21,276 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 09:18:21,281 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 09:18:21,281 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:18:21" (1/1) ... [2022-01-31 09:18:21,282 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15bcd741 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:18:21, skipping insertion in model container [2022-01-31 09:18:21,282 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:18:21" (1/1) ... [2022-01-31 09:18:21,287 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 09:18:21,297 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 09:18:21,407 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-programs/partial_mod_count_2.c[323,336] [2022-01-31 09:18:21,439 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 09:18:21,445 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 09:18:21,453 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-programs/partial_mod_count_2.c[323,336] [2022-01-31 09:18:21,461 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 09:18:21,470 INFO L208 MainTranslator]: Completed translation [2022-01-31 09:18:21,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:18:21 WrapperNode [2022-01-31 09:18:21,471 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 09:18:21,472 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 09:18:21,472 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 09:18:21,472 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 09:18:21,479 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:18:21" (1/1) ... [2022-01-31 09:18:21,480 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:18:21" (1/1) ... [2022-01-31 09:18:21,484 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:18:21" (1/1) ... [2022-01-31 09:18:21,484 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:18:21" (1/1) ... [2022-01-31 09:18:21,494 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:18:21" (1/1) ... [2022-01-31 09:18:21,497 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:18:21" (1/1) ... [2022-01-31 09:18:21,502 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:18:21" (1/1) ... [2022-01-31 09:18:21,504 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 09:18:21,505 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 09:18:21,505 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 09:18:21,505 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 09:18:21,506 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:18:21" (1/1) ... [2022-01-31 09:18:21,510 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 09:18:21,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:18:21,539 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) [2022-01-31 09:18:21,548 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 [2022-01-31 09:18:21,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 09:18:21,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 09:18:21,565 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 09:18:21,565 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 09:18:21,565 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 09:18:21,565 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 09:18:21,565 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 09:18:21,566 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 09:18:21,566 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 09:18:21,566 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 09:18:21,566 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 09:18:21,566 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 09:18:21,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 09:18:21,566 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 09:18:21,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 09:18:21,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 09:18:21,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 09:18:21,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 09:18:21,607 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 09:18:21,608 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 09:18:21,767 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 09:18:21,770 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 09:18:21,771 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 09:18:21,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:18:21 BoogieIcfgContainer [2022-01-31 09:18:21,772 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 09:18:21,772 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 09:18:21,772 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 09:18:21,788 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 09:18:21,790 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:18:21" (1/1) ... [2022-01-31 09:18:21,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 09:18:21 BasicIcfg [2022-01-31 09:18:21,800 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 09:18:21,801 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 09:18:21,801 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 09:18:21,806 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 09:18:21,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 09:18:21" (1/4) ... [2022-01-31 09:18:21,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b239bc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:18:21, skipping insertion in model container [2022-01-31 09:18:21,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:18:21" (2/4) ... [2022-01-31 09:18:21,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b239bc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:18:21, skipping insertion in model container [2022-01-31 09:18:21,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:18:21" (3/4) ... [2022-01-31 09:18:21,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b239bc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 09:18:21, skipping insertion in model container [2022-01-31 09:18:21,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 09:18:21" (4/4) ... [2022-01-31 09:18:21,821 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_mod_count_2.cJordan [2022-01-31 09:18:21,824 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 09:18:21,824 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 09:18:21,881 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 09:18:21,885 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, 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, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 09:18:21,886 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 09:18:21,896 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 18 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 09:18:21,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 09:18:21,905 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:18:21,905 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:18:21,906 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:18:21,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:18:21,912 INFO L85 PathProgramCache]: Analyzing trace with hash 2081050055, now seen corresponding path program 1 times [2022-01-31 09:18:21,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:18:21,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436826179] [2022-01-31 09:18:21,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:18:21,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:18:21,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:18:22,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:18:22,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:18:22,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:18:22,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:18:22,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436826179] [2022-01-31 09:18:22,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436826179] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:18:22,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:18:22,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 09:18:22,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013129650] [2022-01-31 09:18:22,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:18:22,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 09:18:22,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:18:22,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 09:18:22,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 09:18:22,113 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 18 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:18:22,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:18:22,147 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2022-01-31 09:18:22,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 09:18:22,150 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-01-31 09:18:22,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:18:22,155 INFO L225 Difference]: With dead ends: 25 [2022-01-31 09:18:22,155 INFO L226 Difference]: Without dead ends: 20 [2022-01-31 09:18:22,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 09:18:22,159 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:18:22,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 23 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:18:22,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-01-31 09:18:22,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-01-31 09:18:22,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 09:18:22,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-01-31 09:18:22,180 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2022-01-31 09:18:22,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:18:22,180 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-01-31 09:18:22,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:18:22,181 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-01-31 09:18:22,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 09:18:22,181 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:18:22,181 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:18:22,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 09:18:22,182 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:18:22,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:18:22,182 INFO L85 PathProgramCache]: Analyzing trace with hash -471106906, now seen corresponding path program 1 times [2022-01-31 09:18:22,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:18:22,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769485579] [2022-01-31 09:18:22,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:18:22,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:18:22,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:18:22,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:18:22,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:18:22,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:18:22,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:18:22,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769485579] [2022-01-31 09:18:22,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769485579] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:18:22,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:18:22,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 09:18:22,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821311402] [2022-01-31 09:18:22,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:18:22,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 09:18:22,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:18:22,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 09:18:22,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 09:18:22,241 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:18:22,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:18:22,360 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2022-01-31 09:18:22,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 09:18:22,360 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-01-31 09:18:22,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:18:22,362 INFO L225 Difference]: With dead ends: 27 [2022-01-31 09:18:22,362 INFO L226 Difference]: Without dead ends: 27 [2022-01-31 09:18:22,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 09:18:22,379 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 41 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:18:22,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 18 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:18:22,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-31 09:18:22,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2022-01-31 09:18:22,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 09:18:22,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-01-31 09:18:22,385 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2022-01-31 09:18:22,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:18:22,385 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-01-31 09:18:22,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:18:22,385 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-01-31 09:18:22,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 09:18:22,386 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:18:22,386 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:18:22,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 09:18:22,386 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:18:22,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:18:22,387 INFO L85 PathProgramCache]: Analyzing trace with hash -150654790, now seen corresponding path program 1 times [2022-01-31 09:18:22,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:18:22,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973276613] [2022-01-31 09:18:22,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:18:22,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:18:22,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:18:22,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:18:22,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:18:22,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:18:22,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:18:22,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973276613] [2022-01-31 09:18:22,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973276613] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:18:22,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373848308] [2022-01-31 09:18:22,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:18:22,475 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:18:22,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:18:22,496 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) [2022-01-31 09:18:22,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 09:18:22,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:18:22,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 09:18:22,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:18:22,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:18:22,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:18:22,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:18:22,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373848308] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:18:22,720 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:18:22,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-01-31 09:18:22,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433523382] [2022-01-31 09:18:22,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:18:22,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 09:18:22,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:18:22,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 09:18:22,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-01-31 09:18:22,721 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 9 states have internal predecessors, (26), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 09:18:22,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:18:22,875 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2022-01-31 09:18:22,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 09:18:22,875 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 9 states have internal predecessors, (26), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-01-31 09:18:22,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:18:22,877 INFO L225 Difference]: With dead ends: 43 [2022-01-31 09:18:22,877 INFO L226 Difference]: Without dead ends: 43 [2022-01-31 09:18:22,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2022-01-31 09:18:22,881 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 73 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:18:22,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 27 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:18:22,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-31 09:18:22,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2022-01-31 09:18:22,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 09:18:22,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-01-31 09:18:22,893 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 17 [2022-01-31 09:18:22,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:18:22,894 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-01-31 09:18:22,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 9 states have internal predecessors, (26), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 09:18:22,894 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-01-31 09:18:22,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 09:18:22,895 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:18:22,896 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:18:22,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 09:18:23,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:18:23,119 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:18:23,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:18:23,120 INFO L85 PathProgramCache]: Analyzing trace with hash -487976442, now seen corresponding path program 1 times [2022-01-31 09:18:23,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:18:23,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449166199] [2022-01-31 09:18:23,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:18:23,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:18:23,159 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:18:23,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [300278130] [2022-01-31 09:18:23,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:18:23,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:18:23,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:18:23,161 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) [2022-01-31 09:18:23,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 09:18:23,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:18:23,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 09:18:23,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:18:23,318 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:18:23,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:18:23,408 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:18:23,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:18:23,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449166199] [2022-01-31 09:18:23,409 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:18:23,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300278130] [2022-01-31 09:18:23,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300278130] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:18:23,409 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:18:23,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-01-31 09:18:23,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978742016] [2022-01-31 09:18:23,409 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:18:23,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 09:18:23,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:18:23,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 09:18:23,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2022-01-31 09:18:23,410 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 09:18:23,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:18:23,594 INFO L93 Difference]: Finished difference Result 87 states and 112 transitions. [2022-01-31 09:18:23,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 09:18:23,595 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2022-01-31 09:18:23,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:18:23,599 INFO L225 Difference]: With dead ends: 87 [2022-01-31 09:18:23,600 INFO L226 Difference]: Without dead ends: 87 [2022-01-31 09:18:23,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2022-01-31 09:18:23,604 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 164 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:18:23,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 68 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:18:23,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-01-31 09:18:23,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 48. [2022-01-31 09:18:23,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 09:18:23,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2022-01-31 09:18:23,623 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 26 [2022-01-31 09:18:23,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:18:23,624 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2022-01-31 09:18:23,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 09:18:23,624 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2022-01-31 09:18:23,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 09:18:23,625 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:18:23,625 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:18:23,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 09:18:23,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-31 09:18:23,842 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:18:23,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:18:23,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1464565319, now seen corresponding path program 2 times [2022-01-31 09:18:23,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:18:23,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166613073] [2022-01-31 09:18:23,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:18:23,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:18:23,877 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:18:23,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [467324101] [2022-01-31 09:18:23,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:18:23,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:18:23,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:18:23,888 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) [2022-01-31 09:18:23,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 09:18:23,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-31 09:18:23,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:18:23,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 09:18:23,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:18:24,191 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-01-31 09:18:24,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 09:18:24,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:18:24,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166613073] [2022-01-31 09:18:24,191 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:18:24,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467324101] [2022-01-31 09:18:24,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467324101] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:18:24,192 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:18:24,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 09:18:24,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069302415] [2022-01-31 09:18:24,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:18:24,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 09:18:24,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:18:24,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 09:18:24,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-31 09:18:24,193 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:18:24,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:18:24,239 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2022-01-31 09:18:24,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 09:18:24,239 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-01-31 09:18:24,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:18:24,240 INFO L225 Difference]: With dead ends: 60 [2022-01-31 09:18:24,240 INFO L226 Difference]: Without dead ends: 60 [2022-01-31 09:18:24,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-01-31 09:18:24,241 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 32 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:18:24,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 56 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:18:24,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-01-31 09:18:24,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-01-31 09:18:24,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 51 states have (on average 1.196078431372549) internal successors, (61), 51 states have internal predecessors, (61), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:18:24,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2022-01-31 09:18:24,244 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 44 [2022-01-31 09:18:24,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:18:24,245 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2022-01-31 09:18:24,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:18:24,245 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2022-01-31 09:18:24,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 09:18:24,246 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:18:24,246 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:18:24,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 09:18:24,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:18:24,464 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:18:24,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:18:24,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1118259974, now seen corresponding path program 1 times [2022-01-31 09:18:24,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:18:24,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982076282] [2022-01-31 09:18:24,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:18:24,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:18:24,482 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:18:24,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1347518602] [2022-01-31 09:18:24,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:18:24,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:18:24,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:18:24,492 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) [2022-01-31 09:18:24,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 09:18:24,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:18:24,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-31 09:18:24,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:18:24,758 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 09:18:24,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:18:24,945 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 2 proven. 145 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 09:18:24,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:18:24,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982076282] [2022-01-31 09:18:24,945 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:18:24,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347518602] [2022-01-31 09:18:24,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347518602] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:18:24,945 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:18:24,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-01-31 09:18:24,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572884090] [2022-01-31 09:18:24,946 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:18:24,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 09:18:24,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:18:24,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 09:18:24,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2022-01-31 09:18:24,947 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 26 states, 26 states have (on average 3.076923076923077) internal successors, (80), 26 states have internal predecessors, (80), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 09:18:25,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:18:25,430 INFO L93 Difference]: Finished difference Result 354 states and 495 transitions. [2022-01-31 09:18:25,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 09:18:25,430 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.076923076923077) internal successors, (80), 26 states have internal predecessors, (80), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2022-01-31 09:18:25,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:18:25,432 INFO L225 Difference]: With dead ends: 354 [2022-01-31 09:18:25,432 INFO L226 Difference]: Without dead ends: 354 [2022-01-31 09:18:25,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 09:18:25,433 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 374 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 09:18:25,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 92 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 09:18:25,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-01-31 09:18:25,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 96. [2022-01-31 09:18:25,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 87 states have internal predecessors, (103), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:18:25,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 112 transitions. [2022-01-31 09:18:25,448 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 112 transitions. Word has length 52 [2022-01-31 09:18:25,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:18:25,448 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 112 transitions. [2022-01-31 09:18:25,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.076923076923077) internal successors, (80), 26 states have internal predecessors, (80), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 09:18:25,448 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 112 transitions. [2022-01-31 09:18:25,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-01-31 09:18:25,449 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:18:25,449 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 11, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:18:25,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 09:18:25,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:18:25,664 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:18:25,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:18:25,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1260735770, now seen corresponding path program 2 times [2022-01-31 09:18:25,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:18:25,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619948015] [2022-01-31 09:18:25,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:18:25,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:18:25,689 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:18:25,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1455898380] [2022-01-31 09:18:25,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:18:25,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:18:25,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:18:25,690 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) [2022-01-31 09:18:25,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 09:18:25,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:18:25,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:18:25,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-31 09:18:25,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:18:26,273 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 09:18:26,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:18:26,905 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 2 proven. 715 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 09:18:26,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:18:26,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619948015] [2022-01-31 09:18:26,906 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:18:26,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455898380] [2022-01-31 09:18:26,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455898380] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:18:26,906 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:18:26,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-01-31 09:18:26,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716015659] [2022-01-31 09:18:26,906 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:18:26,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 09:18:26,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:18:26,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 09:18:26,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 09:18:26,909 INFO L87 Difference]: Start difference. First operand 96 states and 112 transitions. Second operand has 50 states, 50 states have (on average 3.04) internal successors, (152), 50 states have internal predecessors, (152), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 09:18:28,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:18:28,336 INFO L93 Difference]: Finished difference Result 732 states and 1035 transitions. [2022-01-31 09:18:28,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 09:18:28,337 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.04) internal successors, (152), 50 states have internal predecessors, (152), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 88 [2022-01-31 09:18:28,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:18:28,340 INFO L225 Difference]: With dead ends: 732 [2022-01-31 09:18:28,340 INFO L226 Difference]: Without dead ends: 732 [2022-01-31 09:18:28,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2329, Invalid=2927, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 09:18:28,342 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 931 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 630 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 954 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 1140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 630 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 09:18:28,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [954 Valid, 147 Invalid, 1140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [630 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 09:18:28,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2022-01-31 09:18:28,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 168. [2022-01-31 09:18:28,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 159 states have (on average 1.1761006289308176) internal successors, (187), 159 states have internal predecessors, (187), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:18:28,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 196 transitions. [2022-01-31 09:18:28,357 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 196 transitions. Word has length 88 [2022-01-31 09:18:28,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:18:28,357 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 196 transitions. [2022-01-31 09:18:28,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.04) internal successors, (152), 50 states have internal predecessors, (152), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 09:18:28,357 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 196 transitions. [2022-01-31 09:18:28,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-01-31 09:18:28,359 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:18:28,359 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 23, 23, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:18:28,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 09:18:28,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:18:28,576 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:18:28,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:18:28,577 INFO L85 PathProgramCache]: Analyzing trace with hash -2038883674, now seen corresponding path program 3 times [2022-01-31 09:18:28,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:18:28,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399372969] [2022-01-31 09:18:28,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:18:28,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:18:28,619 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:18:28,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [242504009] [2022-01-31 09:18:28,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 09:18:28,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:18:28,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:18:28,626 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) [2022-01-31 09:18:28,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 09:18:28,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-31 09:18:28,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:18:28,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 09:18:28,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:18:29,180 INFO L134 CoverageAnalysis]: Checked inductivity of 3156 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2022-01-31 09:18:29,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:18:30,872 INFO L134 CoverageAnalysis]: Checked inductivity of 3156 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2022-01-31 09:18:30,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:18:30,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399372969] [2022-01-31 09:18:30,872 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:18:30,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242504009] [2022-01-31 09:18:30,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242504009] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:18:30,872 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:18:30,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2022-01-31 09:18:30,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486815927] [2022-01-31 09:18:30,873 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:18:30,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 09:18:30,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:18:30,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 09:18:30,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2022-01-31 09:18:30,874 INFO L87 Difference]: Start difference. First operand 168 states and 196 transitions. Second operand has 12 states, 10 states have (on average 3.7) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 09:18:30,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:18:30,980 INFO L93 Difference]: Finished difference Result 188 states and 223 transitions. [2022-01-31 09:18:30,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 09:18:30,981 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.7) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 160 [2022-01-31 09:18:30,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:18:30,986 INFO L225 Difference]: With dead ends: 188 [2022-01-31 09:18:30,986 INFO L226 Difference]: Without dead ends: 188 [2022-01-31 09:18:30,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 309 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2022-01-31 09:18:30,987 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 62 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:18:30,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 75 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 09:18:30,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-01-31 09:18:31,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2022-01-31 09:18:31,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 174 states have (on average 1.1839080459770115) internal successors, (206), 174 states have internal predecessors, (206), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 09:18:31,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 223 transitions. [2022-01-31 09:18:31,011 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 223 transitions. Word has length 160 [2022-01-31 09:18:31,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:18:31,011 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 223 transitions. [2022-01-31 09:18:31,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.7) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 09:18:31,012 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 223 transitions. [2022-01-31 09:18:31,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-01-31 09:18:31,013 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:18:31,013 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 23, 23, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:18:31,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-31 09:18:31,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:18:31,214 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:18:31,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:18:31,216 INFO L85 PathProgramCache]: Analyzing trace with hash -132909150, now seen corresponding path program 4 times [2022-01-31 09:18:31,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:18:31,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109381588] [2022-01-31 09:18:31,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:18:31,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:18:31,263 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:18:31,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1118054193] [2022-01-31 09:18:31,263 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 09:18:31,264 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:18:31,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:18:31,265 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) [2022-01-31 09:18:31,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 09:18:31,388 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 09:18:31,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:18:31,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 57 conjunts are in the unsatisfiable core [2022-01-31 09:18:31,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:18:33,060 INFO L134 CoverageAnalysis]: Checked inductivity of 3256 backedges. 3015 proven. 201 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 09:18:33,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:18:37,826 INFO L134 CoverageAnalysis]: Checked inductivity of 3256 backedges. 3025 proven. 191 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 09:18:37,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:18:37,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109381588] [2022-01-31 09:18:37,826 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:18:37,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118054193] [2022-01-31 09:18:37,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118054193] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:18:37,827 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:18:37,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57] total 111 [2022-01-31 09:18:37,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000965228] [2022-01-31 09:18:37,827 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:18:37,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-01-31 09:18:37,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:18:37,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-01-31 09:18:37,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4122, Invalid=8088, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 09:18:37,835 INFO L87 Difference]: Start difference. First operand 188 states and 223 transitions. Second operand has 111 states, 109 states have (on average 3.0) internal successors, (327), 110 states have internal predecessors, (327), 13 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-31 09:20:38,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:20:38,020 INFO L93 Difference]: Finished difference Result 2745 states and 3924 transitions. [2022-01-31 09:20:38,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 485 states. [2022-01-31 09:20:38,033 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 109 states have (on average 3.0) internal successors, (327), 110 states have internal predecessors, (327), 13 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 192 [2022-01-31 09:20:38,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:20:38,060 INFO L225 Difference]: With dead ends: 2745 [2022-01-31 09:20:38,060 INFO L226 Difference]: Without dead ends: 2745 [2022-01-31 09:20:38,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 863 GetRequests, 274 SyntacticMatches, 1 SemanticMatches, 588 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181460 ImplicationChecksByTransitivity, 106.1s TimeCoverageRelationStatistics Valid=101493, Invalid=246017, Unknown=0, NotChecked=0, Total=347510 [2022-01-31 09:20:38,087 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 1092 mSDsluCounter, 1689 mSDsCounter, 0 mSdLazyCounter, 11717 mSolverCounterSat, 3246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1093 SdHoareTripleChecker+Valid, 1792 SdHoareTripleChecker+Invalid, 14963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3246 IncrementalHoareTripleChecker+Valid, 11717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2022-01-31 09:20:38,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1093 Valid, 1792 Invalid, 14963 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3246 Valid, 11717 Invalid, 0 Unknown, 0 Unchecked, 12.3s Time] [2022-01-31 09:20:38,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2745 states. [2022-01-31 09:20:38,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2745 to 1871. [2022-01-31 09:20:38,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1871 states, 1436 states have (on average 1.3147632311977715) internal successors, (1888), 1437 states have internal predecessors, (1888), 429 states have call successors, (429), 6 states have call predecessors, (429), 5 states have return successors, (428), 427 states have call predecessors, (428), 428 states have call successors, (428) [2022-01-31 09:20:38,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 2745 transitions. [2022-01-31 09:20:38,136 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 2745 transitions. Word has length 192 [2022-01-31 09:20:38,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:20:38,136 INFO L470 AbstractCegarLoop]: Abstraction has 1871 states and 2745 transitions. [2022-01-31 09:20:38,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 109 states have (on average 3.0) internal successors, (327), 110 states have internal predecessors, (327), 13 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-31 09:20:38,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 2745 transitions. [2022-01-31 09:20:38,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-01-31 09:20:38,140 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:20:38,140 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 23, 23, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:20:38,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-31 09:20:38,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:20:38,359 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:20:38,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:20:38,359 INFO L85 PathProgramCache]: Analyzing trace with hash 175336029, now seen corresponding path program 5 times [2022-01-31 09:20:38,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:20:38,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286854205] [2022-01-31 09:20:38,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:20:38,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:20:38,394 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:20:38,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [184999904] [2022-01-31 09:20:38,395 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 09:20:38,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:20:38,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:20:38,413 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) [2022-01-31 09:20:38,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-31 09:24:30,594 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2022-01-31 09:24:30,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:24:30,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 726 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-31 09:24:30,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:24:32,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3561 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 410 trivial. 0 not checked. [2022-01-31 09:24:32,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:24:35,053 INFO L134 CoverageAnalysis]: Checked inductivity of 3561 backedges. 20 proven. 3151 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2022-01-31 09:24:35,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:24:35,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286854205] [2022-01-31 09:24:35,054 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:24:35,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184999904] [2022-01-31 09:24:35,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184999904] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:24:35,054 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:24:35,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2022-01-31 09:24:35,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039758489] [2022-01-31 09:24:35,054 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:24:35,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 09:24:35,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:24:35,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 09:24:35,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4659, Invalid=4847, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 09:24:35,057 INFO L87 Difference]: Start difference. First operand 1871 states and 2745 transitions. Second operand has 98 states, 98 states have (on average 3.020408163265306) internal successors, (296), 98 states have internal predecessors, (296), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 09:24:43,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:24:43,534 INFO L93 Difference]: Finished difference Result 43196 states and 64563 transitions. [2022-01-31 09:24:43,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 09:24:43,556 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 3.020408163265306) internal successors, (296), 98 states have internal predecessors, (296), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 232 [2022-01-31 09:24:43,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:24:43,688 INFO L225 Difference]: With dead ends: 43196 [2022-01-31 09:24:43,689 INFO L226 Difference]: Without dead ends: 43196 [2022-01-31 09:24:43,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 367 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4465 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=9265, Invalid=11615, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 09:24:43,690 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 1887 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 975 mSolverCounterSat, 1138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1934 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 2113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1138 IncrementalHoareTripleChecker+Valid, 975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-01-31 09:24:43,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1934 Valid, 230 Invalid, 2113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1138 Valid, 975 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-01-31 09:24:43,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43196 states. [2022-01-31 09:24:44,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43196 to 2015. [2022-01-31 09:24:44,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2015 states, 1580 states have (on average 1.3012658227848102) internal successors, (2056), 1581 states have internal predecessors, (2056), 429 states have call successors, (429), 6 states have call predecessors, (429), 5 states have return successors, (428), 427 states have call predecessors, (428), 428 states have call successors, (428) [2022-01-31 09:24:44,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2015 states to 2015 states and 2913 transitions. [2022-01-31 09:24:44,467 INFO L78 Accepts]: Start accepts. Automaton has 2015 states and 2913 transitions. Word has length 232 [2022-01-31 09:24:44,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:24:44,467 INFO L470 AbstractCegarLoop]: Abstraction has 2015 states and 2913 transitions. [2022-01-31 09:24:44,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 3.020408163265306) internal successors, (296), 98 states have internal predecessors, (296), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 09:24:44,468 INFO L276 IsEmpty]: Start isEmpty. Operand 2015 states and 2913 transitions. [2022-01-31 09:24:44,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2022-01-31 09:24:44,471 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:24:44,471 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 47, 47, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:24:44,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-31 09:24:44,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-31 09:24:44,696 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:24:44,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:24:44,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1911757277, now seen corresponding path program 6 times [2022-01-31 09:24:44,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:24:44,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339778923] [2022-01-31 09:24:44,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:24:44,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:24:44,773 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:24:44,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [974668805] [2022-01-31 09:24:44,773 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 09:24:44,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:24:44,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:24:44,784 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) [2022-01-31 09:24:44,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-31 09:24:48,154 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2022-01-31 09:24:48,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:24:48,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-31 09:24:48,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:24:49,487 INFO L134 CoverageAnalysis]: Checked inductivity of 13617 backedges. 0 proven. 230 refuted. 0 times theorem prover too weak. 13387 trivial. 0 not checked. [2022-01-31 09:24:49,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:24:55,585 INFO L134 CoverageAnalysis]: Checked inductivity of 13617 backedges. 20 proven. 210 refuted. 0 times theorem prover too weak. 13387 trivial. 0 not checked. [2022-01-31 09:24:55,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:24:55,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339778923] [2022-01-31 09:24:55,586 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:24:55,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974668805] [2022-01-31 09:24:55,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974668805] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:24:55,586 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:24:55,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 30 [2022-01-31 09:24:55,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841661949] [2022-01-31 09:24:55,587 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:24:55,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 09:24:55,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:24:55,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 09:24:55,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=512, Unknown=0, NotChecked=0, Total=870 [2022-01-31 09:24:55,588 INFO L87 Difference]: Start difference. First operand 2015 states and 2913 transitions. Second operand has 30 states, 28 states have (on average 3.25) internal successors, (91), 29 states have internal predecessors, (91), 25 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (22), 22 states have call predecessors, (22), 21 states have call successors, (22) [2022-01-31 09:24:56,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:24:56,371 INFO L93 Difference]: Finished difference Result 7392 states and 10979 transitions. [2022-01-31 09:24:56,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 09:24:56,372 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 3.25) internal successors, (91), 29 states have internal predecessors, (91), 25 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (22), 22 states have call predecessors, (22), 21 states have call successors, (22) Word has length 376 [2022-01-31 09:24:56,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:24:56,386 INFO L225 Difference]: With dead ends: 7392 [2022-01-31 09:24:56,386 INFO L226 Difference]: Without dead ends: 7392 [2022-01-31 09:24:56,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 766 GetRequests, 723 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=706, Invalid=1186, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 09:24:56,387 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 299 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 09:24:56,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 115 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 09:24:56,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7392 states. [2022-01-31 09:24:56,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7392 to 7392. [2022-01-31 09:24:56,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7392 states, 5603 states have (on average 1.323933606996252) internal successors, (7418), 5617 states have internal predecessors, (7418), 1781 states have call successors, (1781), 8 states have call predecessors, (1781), 7 states have return successors, (1780), 1766 states have call predecessors, (1780), 1780 states have call successors, (1780) [2022-01-31 09:24:56,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7392 states to 7392 states and 10979 transitions. [2022-01-31 09:24:56,523 INFO L78 Accepts]: Start accepts. Automaton has 7392 states and 10979 transitions. Word has length 376 [2022-01-31 09:24:56,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:24:56,524 INFO L470 AbstractCegarLoop]: Abstraction has 7392 states and 10979 transitions. [2022-01-31 09:24:56,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 3.25) internal successors, (91), 29 states have internal predecessors, (91), 25 states have call successors, (25), 4 states have call predecessors, (25), 3 states have return successors, (22), 22 states have call predecessors, (22), 21 states have call successors, (22) [2022-01-31 09:24:56,524 INFO L276 IsEmpty]: Start isEmpty. Operand 7392 states and 10979 transitions. [2022-01-31 09:24:56,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2022-01-31 09:24:56,530 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:24:56,531 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 47, 47, 24, 24, 24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:24:56,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-31 09:24:56,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:24:56,744 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:24:56,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:24:56,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1883549584, now seen corresponding path program 7 times [2022-01-31 09:24:56,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:24:56,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87377879] [2022-01-31 09:24:56,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:24:56,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:24:56,822 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:24:56,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1876920288] [2022-01-31 09:24:56,823 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 09:24:56,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:24:56,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:24:56,827 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) [2022-01-31 09:24:56,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-31 09:24:57,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:24:57,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 1440 conjuncts, 97 conjunts are in the unsatisfiable core [2022-01-31 09:24:57,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:25:01,135 INFO L134 CoverageAnalysis]: Checked inductivity of 15346 backedges. 0 proven. 13207 refuted. 0 times theorem prover too weak. 2139 trivial. 0 not checked. [2022-01-31 09:25:01,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:25:21,934 INFO L134 CoverageAnalysis]: Checked inductivity of 15346 backedges. 46 proven. 13207 refuted. 0 times theorem prover too weak. 2093 trivial. 0 not checked. [2022-01-31 09:25:21,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:25:21,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87377879] [2022-01-31 09:25:21,935 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:25:21,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876920288] [2022-01-31 09:25:21,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876920288] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:25:21,935 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:25:21,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 194 [2022-01-31 09:25:21,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962675187] [2022-01-31 09:25:21,935 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:25:21,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2022-01-31 09:25:21,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:25:21,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2022-01-31 09:25:21,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18531, Invalid=18911, Unknown=0, NotChecked=0, Total=37442 [2022-01-31 09:25:21,943 INFO L87 Difference]: Start difference. First operand 7392 states and 10979 transitions. Second operand has 194 states, 194 states have (on average 3.0103092783505154) internal successors, (584), 194 states have internal predecessors, (584), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 09:28:04,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:28:04,783 INFO L93 Difference]: Finished difference Result 517101 states and 775109 transitions. [2022-01-31 09:28:04,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2022-01-31 09:28:04,799 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 3.0103092783505154) internal successors, (584), 194 states have internal predecessors, (584), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 480 [2022-01-31 09:28:04,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:28:06,450 INFO L225 Difference]: With dead ends: 517101 [2022-01-31 09:28:06,451 INFO L226 Difference]: Without dead ends: 517101 [2022-01-31 09:28:06,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1054 GetRequests, 767 SyntacticMatches, 0 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18145 ImplicationChecksByTransitivity, 156.8s TimeCoverageRelationStatistics Valid=36961, Invalid=46271, Unknown=0, NotChecked=0, Total=83232 [2022-01-31 09:28:06,455 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 5378 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 1979 mSolverCounterSat, 3518 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5473 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 5497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3518 IncrementalHoareTripleChecker+Valid, 1979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2022-01-31 09:28:06,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5473 Valid, 436 Invalid, 5497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3518 Valid, 1979 Invalid, 0 Unknown, 0 Unchecked, 11.5s Time] [2022-01-31 09:28:06,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517101 states. [2022-01-31 09:28:15,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517101 to 7680. [2022-01-31 09:28:15,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7680 states, 5891 states have (on average 1.3162451196740792) internal successors, (7754), 5905 states have internal predecessors, (7754), 1781 states have call successors, (1781), 8 states have call predecessors, (1781), 7 states have return successors, (1780), 1766 states have call predecessors, (1780), 1780 states have call successors, (1780) [2022-01-31 09:28:15,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7680 states to 7680 states and 11315 transitions. [2022-01-31 09:28:15,572 INFO L78 Accepts]: Start accepts. Automaton has 7680 states and 11315 transitions. Word has length 480 [2022-01-31 09:28:15,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:28:15,572 INFO L470 AbstractCegarLoop]: Abstraction has 7680 states and 11315 transitions. [2022-01-31 09:28:15,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 3.0103092783505154) internal successors, (584), 194 states have internal predecessors, (584), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 09:28:15,572 INFO L276 IsEmpty]: Start isEmpty. Operand 7680 states and 11315 transitions. [2022-01-31 09:28:15,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 769 [2022-01-31 09:28:15,583 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:28:15,583 INFO L514 BasicCegarLoop]: trace histogram [190, 190, 95, 95, 24, 24, 24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:28:15,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-31 09:28:15,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-31 09:28:15,800 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:28:15,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:28:15,801 INFO L85 PathProgramCache]: Analyzing trace with hash 614108816, now seen corresponding path program 8 times [2022-01-31 09:28:15,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:28:15,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358387011] [2022-01-31 09:28:15,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:28:15,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:28:15,896 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:28:15,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1778647338] [2022-01-31 09:28:15,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:28:15,897 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:28:15,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:28:15,898 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) [2022-01-31 09:28:15,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-31 09:28:16,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:28:16,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:28:16,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 2400 conjuncts, 193 conjunts are in the unsatisfiable core [2022-01-31 09:28:16,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:28:25,995 INFO L134 CoverageAnalysis]: Checked inductivity of 56194 backedges. 0 proven. 54055 refuted. 0 times theorem prover too weak. 2139 trivial. 0 not checked. [2022-01-31 09:28:25,995 INFO L328 TraceCheckSpWp]: Computing backward predicates...