/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/reducercommutativity/avg40-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 08:23:26,439 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 08:23:26,442 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 08:23:26,518 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 08:23:26,518 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 08:23:26,521 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 08:23:26,524 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 08:23:26,529 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 08:23:26,530 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 08:23:26,535 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 08:23:26,536 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 08:23:26,537 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 08:23:26,537 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 08:23:26,539 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 08:23:26,540 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 08:23:26,543 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 08:23:26,544 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 08:23:26,544 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 08:23:26,546 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 08:23:26,551 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 08:23:26,553 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 08:23:26,554 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 08:23:26,556 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 08:23:26,557 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 08:23:26,563 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 08:23:26,566 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 08:23:26,567 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 08:23:26,569 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 08:23:26,569 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 08:23:26,571 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 08:23:26,571 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 08:23:26,572 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 08:23:26,572 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 08:23:26,572 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 08:23:26,573 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 08:23:26,573 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 08:23:26,574 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 08:23:26,588 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 08:23:26,588 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 08:23:26,590 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 08:23:26,590 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 08:23:26,590 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 08:23:26,590 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 08:23:26,590 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 08:23:26,590 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 08:23:26,590 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 08:23:26,591 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 08:23:26,591 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 08:23:26,592 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 08:23:26,592 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 08:23:26,592 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 08:23:26,592 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 08:23:26,592 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 08:23:26,592 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 08:23:26,592 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 08:23:26,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:23:26,593 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 08:23:26,593 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 08:23:26,594 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 08:23:26,594 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 08:23:26,837 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 08:23:26,871 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 08:23:26,873 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 08:23:26,874 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 08:23:26,875 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 08:23:26,876 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/avg40-2.i [2022-01-31 08:23:26,933 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82d51dcd8/535bec65cb1c40aea5850e8144ff28e0/FLAG0ae5956ba [2022-01-31 08:23:27,363 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 08:23:27,364 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/avg40-2.i [2022-01-31 08:23:27,381 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82d51dcd8/535bec65cb1c40aea5850e8144ff28e0/FLAG0ae5956ba [2022-01-31 08:23:27,770 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82d51dcd8/535bec65cb1c40aea5850e8144ff28e0 [2022-01-31 08:23:27,772 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 08:23:27,773 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 08:23:27,775 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 08:23:27,775 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 08:23:27,778 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 08:23:27,779 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:23:27" (1/1) ... [2022-01-31 08:23:27,780 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f49c9af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:23:27, skipping insertion in model container [2022-01-31 08:23:27,780 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:23:27" (1/1) ... [2022-01-31 08:23:27,789 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 08:23:27,805 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 08:23:27,966 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/avg40-2.i[1282,1295] [2022-01-31 08:23:27,969 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:23:27,977 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 08:23:28,013 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/avg40-2.i[1282,1295] [2022-01-31 08:23:28,015 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:23:28,027 INFO L208 MainTranslator]: Completed translation [2022-01-31 08:23:28,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:23:28 WrapperNode [2022-01-31 08:23:28,028 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 08:23:28,029 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 08:23:28,029 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 08:23:28,029 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 08:23:28,040 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:23:28" (1/1) ... [2022-01-31 08:23:28,041 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:23:28" (1/1) ... [2022-01-31 08:23:28,055 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:23:28" (1/1) ... [2022-01-31 08:23:28,056 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:23:28" (1/1) ... [2022-01-31 08:23:28,068 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:23:28" (1/1) ... [2022-01-31 08:23:28,071 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:23:28" (1/1) ... [2022-01-31 08:23:28,072 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:23:28" (1/1) ... [2022-01-31 08:23:28,074 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 08:23:28,075 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 08:23:28,075 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 08:23:28,075 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 08:23:28,077 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:23:28" (1/1) ... [2022-01-31 08:23:28,083 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:23:28,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:23:28,106 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 08:23:28,111 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 08:23:28,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 08:23:28,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 08:23:28,142 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 08:23:28,142 INFO L138 BoogieDeclarations]: Found implementation of procedure avg [2022-01-31 08:23:28,142 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 08:23:28,142 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 08:23:28,142 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 08:23:28,142 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 08:23:28,143 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 08:23:28,143 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 08:23:28,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 08:23:28,143 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 08:23:28,143 INFO L130 BoogieDeclarations]: Found specification of procedure avg [2022-01-31 08:23:28,143 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 08:23:28,143 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 08:23:28,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 08:23:28,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 08:23:28,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 08:23:28,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 08:23:28,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 08:23:28,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 08:23:28,205 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 08:23:28,207 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 08:23:28,396 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 08:23:28,407 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 08:23:28,408 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 08:23:28,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:23:28 BoogieIcfgContainer [2022-01-31 08:23:28,409 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 08:23:28,410 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 08:23:28,410 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 08:23:28,411 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 08:23:28,414 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:23:28" (1/1) ... [2022-01-31 08:23:28,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:23:28 BasicIcfg [2022-01-31 08:23:28,441 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 08:23:28,442 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 08:23:28,443 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 08:23:28,445 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 08:23:28,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 08:23:27" (1/4) ... [2022-01-31 08:23:28,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ea94391 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:23:28, skipping insertion in model container [2022-01-31 08:23:28,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:23:28" (2/4) ... [2022-01-31 08:23:28,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ea94391 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:23:28, skipping insertion in model container [2022-01-31 08:23:28,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:23:28" (3/4) ... [2022-01-31 08:23:28,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ea94391 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 08:23:28, skipping insertion in model container [2022-01-31 08:23:28,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:23:28" (4/4) ... [2022-01-31 08:23:28,449 INFO L111 eAbstractionObserver]: Analyzing ICFG avg40-2.iJordan [2022-01-31 08:23:28,453 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 08:23:28,454 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 08:23:28,535 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 08:23:28,541 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 08:23:28,541 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 08:23:28,572 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 21 states have (on average 1.380952380952381) internal successors, (29), 22 states have internal predecessors, (29), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 08:23:28,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 08:23:28,579 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:23:28,580 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:23:28,581 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:23:28,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:23:28,585 INFO L85 PathProgramCache]: Analyzing trace with hash 142417289, now seen corresponding path program 1 times [2022-01-31 08:23:28,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:23:28,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283603641] [2022-01-31 08:23:28,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:23:28,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:23:28,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:28,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:23:28,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:28,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:23:28,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:28,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-31 08:23:28,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:28,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 08:23:28,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:28,873 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 08:23:28,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:23:28,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283603641] [2022-01-31 08:23:28,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283603641] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:23:28,874 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:23:28,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 08:23:28,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371922580] [2022-01-31 08:23:28,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:23:28,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 08:23:28,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:23:28,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 08:23:28,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 08:23:28,905 INFO L87 Difference]: Start difference. First operand has 31 states, 21 states have (on average 1.380952380952381) internal successors, (29), 22 states have internal predecessors, (29), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:23:28,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:23:28,960 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2022-01-31 08:23:28,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 08:23:28,963 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-01-31 08:23:28,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:23:28,972 INFO L225 Difference]: With dead ends: 31 [2022-01-31 08:23:28,972 INFO L226 Difference]: Without dead ends: 26 [2022-01-31 08:23:28,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 08:23:28,978 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 22 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:23:28,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 35 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:23:28,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-31 08:23:29,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-01-31 08:23:29,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:23:29,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-01-31 08:23:29,028 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 32 [2022-01-31 08:23:29,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:23:29,030 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-01-31 08:23:29,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:23:29,030 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-01-31 08:23:29,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 08:23:29,032 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:23:29,032 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:23:29,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 08:23:29,033 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:23:29,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:23:29,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1780278, now seen corresponding path program 1 times [2022-01-31 08:23:29,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:23:29,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343958290] [2022-01-31 08:23:29,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:23:29,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:23:29,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:29,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:23:29,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:29,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:23:29,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:29,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-31 08:23:29,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:29,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 08:23:29,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:29,137 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-31 08:23:29,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:23:29,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343958290] [2022-01-31 08:23:29,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343958290] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:23:29,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366249237] [2022-01-31 08:23:29,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:23:29,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:23:29,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:23:29,147 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 08:23:29,171 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 08:23:29,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:29,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-31 08:23:29,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:23:29,345 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 08:23:29,346 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 08:23:29,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366249237] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:23:29,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 08:23:29,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-31 08:23:29,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379580444] [2022-01-31 08:23:29,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:23:29,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 08:23:29,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:23:29,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 08:23:29,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:23:29,362 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:23:29,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:23:29,375 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2022-01-31 08:23:29,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 08:23:29,377 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-01-31 08:23:29,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:23:29,378 INFO L225 Difference]: With dead ends: 28 [2022-01-31 08:23:29,378 INFO L226 Difference]: Without dead ends: 28 [2022-01-31 08:23:29,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:23:29,379 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:23:29,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:23:29,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-31 08:23:29,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-01-31 08:23:29,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:23:29,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-01-31 08:23:29,391 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 32 [2022-01-31 08:23:29,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:23:29,392 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-01-31 08:23:29,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:23:29,392 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-01-31 08:23:29,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 08:23:29,393 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:23:29,393 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:23:29,422 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 08:23:29,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:23:29,608 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:23:29,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:23:29,609 INFO L85 PathProgramCache]: Analyzing trace with hash 561300940, now seen corresponding path program 1 times [2022-01-31 08:23:29,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:23:29,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374378281] [2022-01-31 08:23:29,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:23:29,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:23:29,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:29,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:23:29,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:29,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-31 08:23:29,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:29,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 08:23:29,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:29,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 08:23:29,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:29,751 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-31 08:23:29,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:23:29,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374378281] [2022-01-31 08:23:29,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374378281] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:23:29,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067253194] [2022-01-31 08:23:29,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:23:29,752 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:23:29,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:23:29,753 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 08:23:29,755 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 08:23:29,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:29,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-31 08:23:29,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:23:29,878 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 08:23:29,878 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 08:23:29,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067253194] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:23:29,879 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 08:23:29,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-01-31 08:23:29,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923289754] [2022-01-31 08:23:29,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:23:29,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 08:23:29,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:23:29,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 08:23:29,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:23:29,882 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:23:29,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:23:29,905 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2022-01-31 08:23:29,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 08:23:29,905 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2022-01-31 08:23:29,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:23:29,907 INFO L225 Difference]: With dead ends: 29 [2022-01-31 08:23:29,907 INFO L226 Difference]: Without dead ends: 29 [2022-01-31 08:23:29,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:23:29,910 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:23:29,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:23:29,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-31 08:23:29,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-01-31 08:23:29,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:23:29,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-01-31 08:23:29,920 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34 [2022-01-31 08:23:29,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:23:29,921 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-01-31 08:23:29,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:23:29,921 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-01-31 08:23:29,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 08:23:29,923 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:23:29,924 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:23:29,954 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 08:23:30,149 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,SelfDestructingSolverStorable2 [2022-01-31 08:23:30,150 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:23:30,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:23:30,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1061096375, now seen corresponding path program 1 times [2022-01-31 08:23:30,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:23:30,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5734586] [2022-01-31 08:23:30,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:23:30,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:23:30,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:30,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:23:30,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:30,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-31 08:23:30,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:30,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 08:23:30,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:30,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-31 08:23:30,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:30,254 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-31 08:23:30,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:23:30,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5734586] [2022-01-31 08:23:30,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5734586] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:23:30,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489340526] [2022-01-31 08:23:30,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:23:30,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:23:30,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:23:30,258 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 08:23:30,260 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 08:23:30,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:30,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-31 08:23:30,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:23:30,393 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-31 08:23:30,394 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 08:23:30,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489340526] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:23:30,394 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 08:23:30,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-01-31 08:23:30,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681930562] [2022-01-31 08:23:30,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:23:30,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 08:23:30,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:23:30,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 08:23:30,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:23:30,396 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:23:30,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:23:30,403 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2022-01-31 08:23:30,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 08:23:30,404 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2022-01-31 08:23:30,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:23:30,404 INFO L225 Difference]: With dead ends: 30 [2022-01-31 08:23:30,404 INFO L226 Difference]: Without dead ends: 30 [2022-01-31 08:23:30,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:23:30,405 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:23:30,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:23:30,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-31 08:23:30,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-01-31 08:23:30,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:23:30,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-01-31 08:23:30,410 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 40 [2022-01-31 08:23:30,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:23:30,411 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-01-31 08:23:30,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:23:30,411 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-01-31 08:23:30,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 08:23:30,412 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:23:30,412 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:23:30,440 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 08:23:30,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:23:30,638 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:23:30,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:23:30,638 INFO L85 PathProgramCache]: Analyzing trace with hash -619501722, now seen corresponding path program 1 times [2022-01-31 08:23:30,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:23:30,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758222721] [2022-01-31 08:23:30,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:23:30,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:23:30,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:30,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:23:30,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:30,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-31 08:23:30,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:30,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-01-31 08:23:30,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:30,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-31 08:23:30,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:30,701 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-31 08:23:30,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:23:30,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758222721] [2022-01-31 08:23:30,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758222721] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:23:30,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703092663] [2022-01-31 08:23:30,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:23:30,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:23:30,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:23:30,703 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 08:23:30,704 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 08:23:30,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:30,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 08:23:30,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:23:30,855 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-31 08:23:30,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:23:30,954 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-31 08:23:30,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703092663] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:23:30,955 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:23:30,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 08:23:30,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111022890] [2022-01-31 08:23:30,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:23:30,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 08:23:30,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:23:30,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 08:23:30,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 08:23:30,958 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:23:31,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:23:31,067 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2022-01-31 08:23:31,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 08:23:31,068 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 42 [2022-01-31 08:23:31,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:23:31,070 INFO L225 Difference]: With dead ends: 35 [2022-01-31 08:23:31,070 INFO L226 Difference]: Without dead ends: 35 [2022-01-31 08:23:31,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-01-31 08:23:31,072 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 28 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:23:31,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 37 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:23:31,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-31 08:23:31,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-01-31 08:23:31,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:23:31,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-01-31 08:23:31,084 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 42 [2022-01-31 08:23:31,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:23:31,084 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-01-31 08:23:31,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:23:31,085 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-01-31 08:23:31,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 08:23:31,086 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:23:31,086 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:23:31,116 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 08:23:31,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:23:31,300 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:23:31,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:23:31,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1074871916, now seen corresponding path program 2 times [2022-01-31 08:23:31,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:23:31,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456374020] [2022-01-31 08:23:31,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:23:31,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:23:31,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:31,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:23:31,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:31,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 08:23:31,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:31,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-31 08:23:31,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:31,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-31 08:23:31,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:31,391 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-31 08:23:31,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:23:31,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456374020] [2022-01-31 08:23:31,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456374020] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:23:31,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391836167] [2022-01-31 08:23:31,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:23:31,392 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:23:31,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:23:31,394 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 08:23:31,413 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 08:23:31,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:23:31,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:23:31,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 08:23:31,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:23:31,581 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-31 08:23:31,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:23:31,704 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-31 08:23:31,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391836167] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:23:31,705 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:23:31,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2022-01-31 08:23:31,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411040368] [2022-01-31 08:23:31,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:23:31,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 08:23:31,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:23:31,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 08:23:31,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-01-31 08:23:31,707 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-31 08:23:31,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:23:31,936 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2022-01-31 08:23:31,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 08:23:31,937 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 48 [2022-01-31 08:23:31,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:23:31,939 INFO L225 Difference]: With dead ends: 50 [2022-01-31 08:23:31,940 INFO L226 Difference]: Without dead ends: 50 [2022-01-31 08:23:31,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=489, Unknown=0, NotChecked=0, Total=702 [2022-01-31 08:23:31,943 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 47 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:23:31,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 50 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:23:31,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-31 08:23:31,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-01-31 08:23:31,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:23:31,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2022-01-31 08:23:31,955 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 48 [2022-01-31 08:23:31,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:23:31,955 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2022-01-31 08:23:31,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-31 08:23:31,956 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2022-01-31 08:23:31,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 08:23:31,956 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:23:31,957 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:23:31,975 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 08:23:32,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:23:32,164 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:23:32,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:23:32,164 INFO L85 PathProgramCache]: Analyzing trace with hash 859300597, now seen corresponding path program 3 times [2022-01-31 08:23:32,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:23:32,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018885781] [2022-01-31 08:23:32,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:23:32,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:23:32,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:32,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:23:32,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:32,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-31 08:23:32,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:32,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 08:23:32,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:32,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-31 08:23:32,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:32,252 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-01-31 08:23:32,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:23:32,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018885781] [2022-01-31 08:23:32,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018885781] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:23:32,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005438140] [2022-01-31 08:23:32,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:23:32,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:23:32,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:23:32,256 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 08:23:32,280 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 08:23:32,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 08:23:32,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:23:32,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 08:23:32,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:23:32,423 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2022-01-31 08:23:32,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:23:32,509 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-01-31 08:23:32,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005438140] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:23:32,510 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:23:32,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 08:23:32,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227766209] [2022-01-31 08:23:32,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:23:32,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 08:23:32,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:23:32,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 08:23:32,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 08:23:32,513 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 08:23:32,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:23:32,598 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2022-01-31 08:23:32,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 08:23:32,599 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 66 [2022-01-31 08:23:32,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:23:32,601 INFO L225 Difference]: With dead ends: 55 [2022-01-31 08:23:32,601 INFO L226 Difference]: Without dead ends: 55 [2022-01-31 08:23:32,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-01-31 08:23:32,602 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 28 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:23:32,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 37 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:23:32,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-31 08:23:32,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-01-31 08:23:32,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:23:32,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2022-01-31 08:23:32,615 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 66 [2022-01-31 08:23:32,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:23:32,615 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2022-01-31 08:23:32,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 08:23:32,616 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2022-01-31 08:23:32,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 08:23:32,618 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:23:32,619 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:23:32,650 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 08:23:32,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:23:32,844 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:23:32,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:23:32,844 INFO L85 PathProgramCache]: Analyzing trace with hash 49480076, now seen corresponding path program 4 times [2022-01-31 08:23:32,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:23:32,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483499414] [2022-01-31 08:23:32,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:23:32,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:23:32,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:32,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:23:32,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:32,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-31 08:23:32,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:32,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 08:23:33,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:33,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-31 08:23:33,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:33,011 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-01-31 08:23:33,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:23:33,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483499414] [2022-01-31 08:23:33,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483499414] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:23:33,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890490388] [2022-01-31 08:23:33,012 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 08:23:33,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:23:33,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:23:33,013 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 08:23:33,036 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 08:23:33,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 08:23:33,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:23:33,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 08:23:33,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:23:33,233 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-01-31 08:23:33,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:23:33,361 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-01-31 08:23:33,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890490388] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:23:33,362 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:23:33,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 20 [2022-01-31 08:23:33,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398262390] [2022-01-31 08:23:33,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:23:33,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 08:23:33,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:23:33,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 08:23:33,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2022-01-31 08:23:33,364 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:23:33,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:23:33,652 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2022-01-31 08:23:33,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 08:23:33,653 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 72 [2022-01-31 08:23:33,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:23:33,655 INFO L225 Difference]: With dead ends: 66 [2022-01-31 08:23:33,655 INFO L226 Difference]: Without dead ends: 66 [2022-01-31 08:23:33,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=315, Invalid=1017, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 08:23:33,656 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 55 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:23:33,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 40 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:23:33,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-31 08:23:33,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2022-01-31 08:23:33,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:23:33,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2022-01-31 08:23:33,661 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 72 [2022-01-31 08:23:33,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:23:33,661 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2022-01-31 08:23:33,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:23:33,661 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2022-01-31 08:23:33,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-01-31 08:23:33,662 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:23:33,662 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 11, 11, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:23:33,691 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 08:23:33,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:23:33,879 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:23:33,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:23:33,880 INFO L85 PathProgramCache]: Analyzing trace with hash -2077107966, now seen corresponding path program 5 times [2022-01-31 08:23:33,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:23:33,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292770332] [2022-01-31 08:23:33,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:23:33,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:23:33,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:34,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:23:34,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:34,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-01-31 08:23:34,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:34,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 08:23:34,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:34,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-01-31 08:23:34,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:34,058 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2022-01-31 08:23:34,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:23:34,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292770332] [2022-01-31 08:23:34,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292770332] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:23:34,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131473572] [2022-01-31 08:23:34,059 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 08:23:34,059 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:23:34,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:23:34,061 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 08:23:34,062 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 08:23:34,653 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-01-31 08:23:34,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:23:34,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 08:23:34,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:23:34,869 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2022-01-31 08:23:34,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:23:35,125 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-01-31 08:23:35,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131473572] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:23:35,126 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:23:35,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 29 [2022-01-31 08:23:35,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841966942] [2022-01-31 08:23:35,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:23:35,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 08:23:35,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:23:35,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 08:23:35,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2022-01-31 08:23:35,128 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 28 states have internal predecessors, (80), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:23:35,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:23:35,657 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2022-01-31 08:23:35,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 08:23:35,658 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 28 states have internal predecessors, (80), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 98 [2022-01-31 08:23:35,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:23:35,658 INFO L225 Difference]: With dead ends: 84 [2022-01-31 08:23:35,659 INFO L226 Difference]: Without dead ends: 84 [2022-01-31 08:23:35,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=2340, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 08:23:35,660 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 77 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:23:35,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 45 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 08:23:35,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-01-31 08:23:35,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2022-01-31 08:23:35,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 75 states have (on average 1.04) internal successors, (78), 75 states have internal predecessors, (78), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:23:35,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2022-01-31 08:23:35,665 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 98 [2022-01-31 08:23:35,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:23:35,666 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2022-01-31 08:23:35,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 28 states have internal predecessors, (80), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:23:35,666 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2022-01-31 08:23:35,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-01-31 08:23:35,667 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:23:35,667 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 12, 12, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:23:35,694 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 08:23:35,883 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,SelfDestructingSolverStorable8 [2022-01-31 08:23:35,884 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:23:35,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:23:35,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1610204012, now seen corresponding path program 6 times [2022-01-31 08:23:35,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:23:35,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614744157] [2022-01-31 08:23:35,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:23:35,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:23:35,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:36,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:23:36,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:36,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-31 08:23:36,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:36,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 08:23:36,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:36,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-01-31 08:23:36,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:36,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2023 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1879 trivial. 0 not checked. [2022-01-31 08:23:36,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:23:36,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614744157] [2022-01-31 08:23:36,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614744157] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:23:36,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765915704] [2022-01-31 08:23:36,139 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 08:23:36,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:23:36,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:23:36,140 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 08:23:36,166 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 08:23:36,524 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-01-31 08:23:36,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:23:36,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 08:23:36,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:23:36,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2023 backedges. 850 proven. 16 refuted. 0 times theorem prover too weak. 1157 trivial. 0 not checked. [2022-01-31 08:23:36,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:23:37,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2023 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2007 trivial. 0 not checked. [2022-01-31 08:23:37,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765915704] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:23:37,004 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:23:37,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 7, 7] total 26 [2022-01-31 08:23:37,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431417930] [2022-01-31 08:23:37,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:23:37,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 08:23:37,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:23:37,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 08:23:37,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=478, Unknown=0, NotChecked=0, Total=650 [2022-01-31 08:23:37,006 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:23:37,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:23:37,437 INFO L93 Difference]: Finished difference Result 98 states and 102 transitions. [2022-01-31 08:23:37,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 08:23:37,437 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 148 [2022-01-31 08:23:37,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:23:37,438 INFO L225 Difference]: With dead ends: 98 [2022-01-31 08:23:37,438 INFO L226 Difference]: Without dead ends: 98 [2022-01-31 08:23:37,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=510, Invalid=1842, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 08:23:37,439 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 69 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:23:37,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 55 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:23:37,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-01-31 08:23:37,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2022-01-31 08:23:37,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 89 states have (on average 1.0337078651685394) internal successors, (92), 89 states have internal predecessors, (92), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:23:37,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2022-01-31 08:23:37,444 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 148 [2022-01-31 08:23:37,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:23:37,445 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2022-01-31 08:23:37,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:23:37,445 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2022-01-31 08:23:37,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-01-31 08:23:37,446 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:23:37,446 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 13, 13, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:23:37,467 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 08:23:37,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-31 08:23:37,651 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:23:37,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:23:37,652 INFO L85 PathProgramCache]: Analyzing trace with hash -463648548, now seen corresponding path program 7 times [2022-01-31 08:23:37,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:23:37,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763036652] [2022-01-31 08:23:37,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:23:37,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:23:37,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:37,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:23:37,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:37,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-31 08:23:37,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:37,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 08:23:37,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:37,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-01-31 08:23:37,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:37,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2132 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2022-01-31 08:23:37,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:23:37,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763036652] [2022-01-31 08:23:37,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763036652] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:23:37,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971755181] [2022-01-31 08:23:37,876 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 08:23:37,876 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:23:37,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:23:37,877 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 08:23:37,907 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 08:23:38,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:38,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-31 08:23:38,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:23:38,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2132 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2022-01-31 08:23:38,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:23:38,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2132 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2022-01-31 08:23:38,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971755181] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:23:38,642 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:23:38,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-01-31 08:23:38,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778745092] [2022-01-31 08:23:38,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:23:38,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 08:23:38,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:23:38,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 08:23:38,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-01-31 08:23:38,645 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:23:39,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:23:39,180 INFO L93 Difference]: Finished difference Result 127 states and 131 transitions. [2022-01-31 08:23:39,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 08:23:39,180 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 162 [2022-01-31 08:23:39,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:23:39,181 INFO L225 Difference]: With dead ends: 127 [2022-01-31 08:23:39,181 INFO L226 Difference]: Without dead ends: 127 [2022-01-31 08:23:39,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1336, Invalid=2204, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 08:23:39,183 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 74 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:23:39,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 47 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:23:39,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-01-31 08:23:39,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-01-31 08:23:39,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 119 states have (on average 1.0252100840336134) internal successors, (122), 119 states have internal predecessors, (122), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:23:39,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 131 transitions. [2022-01-31 08:23:39,187 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 131 transitions. Word has length 162 [2022-01-31 08:23:39,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:23:39,188 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 131 transitions. [2022-01-31 08:23:39,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.59375) internal successors, (83), 31 states have internal predecessors, (83), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:23:39,188 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 131 transitions. [2022-01-31 08:23:39,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-01-31 08:23:39,189 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:23:39,190 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 28, 28, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:23:39,220 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 08:23:39,409 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,SelfDestructingSolverStorable10 [2022-01-31 08:23:39,410 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:23:39,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:23:39,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1903557882, now seen corresponding path program 8 times [2022-01-31 08:23:39,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:23:39,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010077510] [2022-01-31 08:23:39,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:23:39,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:23:39,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:39,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:23:39,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:39,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-01-31 08:23:39,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:39,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 08:23:39,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:39,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2022-01-31 08:23:39,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:39,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2747 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2022-01-31 08:23:39,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:23:39,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010077510] [2022-01-31 08:23:39,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010077510] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:23:39,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072006186] [2022-01-31 08:23:39,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:23:39,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:23:39,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:23:39,904 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 08:23:39,912 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 08:23:40,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:23:40,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:23:40,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-31 08:23:40,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:23:40,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2747 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2022-01-31 08:23:40,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:23:40,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2747 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2022-01-31 08:23:40,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072006186] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:23:40,953 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:23:40,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 44 [2022-01-31 08:23:40,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117138995] [2022-01-31 08:23:40,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:23:40,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 08:23:40,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:23:40,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 08:23:40,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 08:23:40,955 INFO L87 Difference]: Start difference. First operand 127 states and 131 transitions. Second operand has 44 states, 44 states have (on average 2.477272727272727) internal successors, (109), 43 states have internal predecessors, (109), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:23:41,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:23:41,872 INFO L93 Difference]: Finished difference Result 151 states and 155 transitions. [2022-01-31 08:23:41,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 08:23:41,873 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.477272727272727) internal successors, (109), 43 states have internal predecessors, (109), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 192 [2022-01-31 08:23:41,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:23:41,874 INFO L225 Difference]: With dead ends: 151 [2022-01-31 08:23:41,874 INFO L226 Difference]: Without dead ends: 151 [2022-01-31 08:23:41,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 379 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2626, Invalid=4346, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 08:23:41,876 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 98 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:23:41,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 42 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:23:41,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-01-31 08:23:41,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2022-01-31 08:23:41,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 143 states have (on average 1.020979020979021) internal successors, (146), 143 states have internal predecessors, (146), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:23:41,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 155 transitions. [2022-01-31 08:23:41,882 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 155 transitions. Word has length 192 [2022-01-31 08:23:41,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:23:41,882 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 155 transitions. [2022-01-31 08:23:41,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.477272727272727) internal successors, (109), 43 states have internal predecessors, (109), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:23:41,883 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 155 transitions. [2022-01-31 08:23:41,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-01-31 08:23:41,884 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:23:41,885 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 40, 40, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:23:41,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-31 08:23:42,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-31 08:23:42,100 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:23:42,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:23:42,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1135004690, now seen corresponding path program 9 times [2022-01-31 08:23:42,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:23:42,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962643263] [2022-01-31 08:23:42,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:23:42,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:23:42,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:42,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:23:42,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:42,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-01-31 08:23:42,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:42,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 08:23:42,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:42,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2022-01-31 08:23:42,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:42,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3563 backedges. 0 proven. 1044 refuted. 0 times theorem prover too weak. 2519 trivial. 0 not checked. [2022-01-31 08:23:42,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:23:42,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962643263] [2022-01-31 08:23:42,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962643263] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:23:42,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383971476] [2022-01-31 08:23:42,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:23:42,423 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:23:42,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:23:42,425 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:23:42,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-31 08:23:43,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-01-31 08:23:43,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:23:43,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-31 08:23:43,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:23:44,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3563 backedges. 850 proven. 100 refuted. 0 times theorem prover too weak. 2613 trivial. 0 not checked. [2022-01-31 08:23:44,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:23:44,519 INFO L134 CoverageAnalysis]: Checked inductivity of 3563 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 3463 trivial. 0 not checked. [2022-01-31 08:23:44,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383971476] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:23:44,520 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:23:44,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 13] total 40 [2022-01-31 08:23:44,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119557836] [2022-01-31 08:23:44,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:23:44,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 08:23:44,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:23:44,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 08:23:44,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=1147, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 08:23:44,522 INFO L87 Difference]: Start difference. First operand 151 states and 155 transitions. Second operand has 40 states, 40 states have (on average 2.575) internal successors, (103), 39 states have internal predecessors, (103), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:23:45,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:23:45,283 INFO L93 Difference]: Finished difference Result 178 states and 182 transitions. [2022-01-31 08:23:45,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 08:23:45,284 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.575) internal successors, (103), 39 states have internal predecessors, (103), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 216 [2022-01-31 08:23:45,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:23:45,287 INFO L225 Difference]: With dead ends: 178 [2022-01-31 08:23:45,287 INFO L226 Difference]: Without dead ends: 178 [2022-01-31 08:23:45,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 418 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1169 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1233, Invalid=4619, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 08:23:45,290 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 92 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:23:45,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 65 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 08:23:45,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-01-31 08:23:45,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2022-01-31 08:23:45,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 169 states have (on average 1.017751479289941) internal successors, (172), 169 states have internal predecessors, (172), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:23:45,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 181 transitions. [2022-01-31 08:23:45,298 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 181 transitions. Word has length 216 [2022-01-31 08:23:45,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:23:45,298 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 181 transitions. [2022-01-31 08:23:45,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.575) internal successors, (103), 39 states have internal predecessors, (103), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-31 08:23:45,298 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 181 transitions. [2022-01-31 08:23:45,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2022-01-31 08:23:45,302 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:23:45,302 INFO L514 BasicCegarLoop]: trace histogram [45, 45, 40, 40, 22, 22, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:23:45,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-31 08:23:45,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-31 08:23:45,511 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:23:45,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:23:45,512 INFO L85 PathProgramCache]: Analyzing trace with hash 880581611, now seen corresponding path program 10 times [2022-01-31 08:23:45,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:23:45,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773582991] [2022-01-31 08:23:45,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:23:45,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:23:45,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:45,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:23:45,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:45,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-01-31 08:23:45,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:45,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 08:23:45,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:45,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2022-01-31 08:23:45,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:45,826 INFO L134 CoverageAnalysis]: Checked inductivity of 4214 backedges. 0 proven. 1193 refuted. 0 times theorem prover too weak. 3021 trivial. 0 not checked. [2022-01-31 08:23:45,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:23:45,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773582991] [2022-01-31 08:23:45,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773582991] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:23:45,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395861428] [2022-01-31 08:23:45,827 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 08:23:45,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:23:45,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:23:45,828 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:23:45,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-31 08:23:46,046 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 08:23:46,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:23:46,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 884 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-31 08:23:46,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:23:46,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4214 backedges. 964 proven. 225 refuted. 0 times theorem prover too weak. 3025 trivial. 0 not checked. [2022-01-31 08:23:46,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:23:47,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4214 backedges. 0 proven. 1193 refuted. 0 times theorem prover too weak. 3021 trivial. 0 not checked. [2022-01-31 08:23:47,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395861428] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:23:47,054 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:23:47,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 35 [2022-01-31 08:23:47,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456073916] [2022-01-31 08:23:47,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:23:47,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 08:23:47,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:23:47,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 08:23:47,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 08:23:47,058 INFO L87 Difference]: Start difference. First operand 177 states and 181 transitions. Second operand has 35 states, 35 states have (on average 2.6285714285714286) internal successors, (92), 34 states have internal predecessors, (92), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 08:23:47,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:23:47,625 INFO L93 Difference]: Finished difference Result 211 states and 215 transitions. [2022-01-31 08:23:47,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 08:23:47,626 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.6285714285714286) internal successors, (92), 34 states have internal predecessors, (92), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 246 [2022-01-31 08:23:47,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:23:47,627 INFO L225 Difference]: With dead ends: 211 [2022-01-31 08:23:47,627 INFO L226 Difference]: Without dead ends: 211 [2022-01-31 08:23:47,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 484 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 08:23:47,635 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 82 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:23:47,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 57 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:23:47,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-01-31 08:23:47,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2022-01-31 08:23:47,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 203 states have (on average 1.0147783251231528) internal successors, (206), 203 states have internal predecessors, (206), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:23:47,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 215 transitions. [2022-01-31 08:23:47,643 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 215 transitions. Word has length 246 [2022-01-31 08:23:47,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:23:47,645 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 215 transitions. [2022-01-31 08:23:47,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.6285714285714286) internal successors, (92), 34 states have internal predecessors, (92), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 08:23:47,645 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 215 transitions. [2022-01-31 08:23:47,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2022-01-31 08:23:47,649 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:23:47,649 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 40, 40, 22, 22, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:23:47,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-31 08:23:47,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-31 08:23:47,863 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:23:47,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:23:47,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1241279480, now seen corresponding path program 11 times [2022-01-31 08:23:47,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:23:47,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436276247] [2022-01-31 08:23:47,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:23:47,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:23:47,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:48,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:23:48,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:48,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-01-31 08:23:48,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:48,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-01-31 08:23:48,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:48,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 275 [2022-01-31 08:23:48,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:23:48,618 INFO L134 CoverageAnalysis]: Checked inductivity of 11507 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 6251 trivial. 0 not checked. [2022-01-31 08:23:48,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:23:48,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436276247] [2022-01-31 08:23:48,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436276247] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:23:48,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232697292] [2022-01-31 08:23:48,619 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 08:23:48,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:23:48,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:23:48,624 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:23:48,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-31 08:30:56,775 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2022-01-31 08:30:56,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:30:57,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 1061 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-31 08:30:57,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:30:57,641 INFO L134 CoverageAnalysis]: Checked inductivity of 11507 backedges. 4228 proven. 1024 refuted. 0 times theorem prover too weak. 6255 trivial. 0 not checked. [2022-01-31 08:30:57,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:30:58,277 INFO L134 CoverageAnalysis]: Checked inductivity of 11507 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 6251 trivial. 0 not checked. [2022-01-31 08:30:58,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232697292] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:30:58,277 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:30:58,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 43 [2022-01-31 08:30:58,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967606726] [2022-01-31 08:30:58,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:30:58,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 08:30:58,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:30:58,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 08:30:58,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 08:30:58,280 INFO L87 Difference]: Start difference. First operand 211 states and 215 transitions. Second operand has 43 states, 43 states have (on average 2.558139534883721) internal successors, (110), 42 states have internal predecessors, (110), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 08:30:59,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:30:59,065 INFO L93 Difference]: Finished difference Result 227 states and 231 transitions. [2022-01-31 08:30:59,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 08:30:59,065 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.558139534883721) internal successors, (110), 42 states have internal predecessors, (110), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 348 [2022-01-31 08:30:59,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:30:59,067 INFO L225 Difference]: With dead ends: 227 [2022-01-31 08:30:59,067 INFO L226 Difference]: Without dead ends: 227 [2022-01-31 08:30:59,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 778 GetRequests, 696 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 08:30:59,069 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 98 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:30:59,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 42 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:30:59,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-01-31 08:30:59,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2022-01-31 08:30:59,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 219 states have (on average 1.0136986301369864) internal successors, (222), 219 states have internal predecessors, (222), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:30:59,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 231 transitions. [2022-01-31 08:30:59,075 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 231 transitions. Word has length 348 [2022-01-31 08:30:59,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:30:59,075 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 231 transitions. [2022-01-31 08:30:59,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.558139534883721) internal successors, (110), 42 states have internal predecessors, (110), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 08:30:59,076 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 231 transitions. [2022-01-31 08:30:59,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2022-01-31 08:30:59,081 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:30:59,081 INFO L514 BasicCegarLoop]: trace histogram [120, 120, 40, 40, 22, 22, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:30:59,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-31 08:30:59,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:30:59,295 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:30:59,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:30:59,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1758944992, now seen corresponding path program 12 times [2022-01-31 08:30:59,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:30:59,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723787063] [2022-01-31 08:30:59,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:30:59,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:30:59,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:30:59,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:30:59,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:30:59,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-01-31 08:30:59,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:30:59,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-01-31 08:30:59,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:30:59,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 307 [2022-01-31 08:30:59,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:30:59,830 INFO L134 CoverageAnalysis]: Checked inductivity of 16739 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 16255 trivial. 0 not checked. [2022-01-31 08:30:59,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:30:59,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723787063] [2022-01-31 08:30:59,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723787063] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:30:59,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221812006] [2022-01-31 08:30:59,831 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 08:30:59,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:30:59,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:30:59,832 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:30:59,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-31 08:31:39,265 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2022-01-31 08:31:39,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:31:39,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-31 08:31:39,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:31:39,896 INFO L134 CoverageAnalysis]: Checked inductivity of 16739 backedges. 6570 proven. 484 refuted. 0 times theorem prover too weak. 9685 trivial. 0 not checked. [2022-01-31 08:31:39,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:31:40,661 INFO L134 CoverageAnalysis]: Checked inductivity of 16739 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 16255 trivial. 0 not checked. [2022-01-31 08:31:40,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221812006] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:31:40,662 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:31:40,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 43 [2022-01-31 08:31:40,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803095884] [2022-01-31 08:31:40,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:31:40,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 08:31:40,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:31:40,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 08:31:40,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 08:31:40,665 INFO L87 Difference]: Start difference. First operand 227 states and 231 transitions. Second operand has 43 states, 43 states have (on average 2.488372093023256) internal successors, (107), 42 states have internal predecessors, (107), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 08:31:41,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:31:41,525 INFO L93 Difference]: Finished difference Result 261 states and 265 transitions. [2022-01-31 08:31:41,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 08:31:41,526 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.488372093023256) internal successors, (107), 42 states have internal predecessors, (107), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 396 [2022-01-31 08:31:41,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:31:41,528 INFO L225 Difference]: With dead ends: 261 [2022-01-31 08:31:41,528 INFO L226 Difference]: Without dead ends: 261 [2022-01-31 08:31:41,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 863 GetRequests, 782 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2502, Invalid=4140, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 08:31:41,530 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 96 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:31:41,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 62 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 08:31:41,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-01-31 08:31:41,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2022-01-31 08:31:41,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 253 states have (on average 1.0118577075098814) internal successors, (256), 253 states have internal predecessors, (256), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:31:41,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 265 transitions. [2022-01-31 08:31:41,537 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 265 transitions. Word has length 396 [2022-01-31 08:31:41,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:31:41,537 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 265 transitions. [2022-01-31 08:31:41,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.488372093023256) internal successors, (107), 42 states have internal predecessors, (107), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 08:31:41,538 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 265 transitions. [2022-01-31 08:31:41,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2022-01-31 08:31:41,540 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:31:41,540 INFO L514 BasicCegarLoop]: trace histogram [120, 120, 40, 40, 39, 39, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:31:41,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-31 08:31:41,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-31 08:31:41,751 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:31:41,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:31:41,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1997896691, now seen corresponding path program 13 times [2022-01-31 08:31:41,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:31:41,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922540190] [2022-01-31 08:31:41,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:31:41,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:32:07,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:34:48,947 WARN L228 SmtUtils]: Spent 14.80s on a formula simplification. DAG size of input: 225 DAG size of output: 218 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 08:35:38,994 WARN L228 SmtUtils]: Spent 14.80s on a formula simplification. DAG size of input: 206 DAG size of output: 201 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)