/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/loop-lit/gj2007.c.i.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 12:31:03,488 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 12:31:03,490 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 12:31:03,553 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 12:31:03,554 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 12:31:03,556 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 12:31:03,558 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 12:31:03,559 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 12:31:03,561 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 12:31:03,563 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 12:31:03,564 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 12:31:03,565 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 12:31:03,565 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 12:31:03,566 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 12:31:03,569 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 12:31:03,570 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 12:31:03,570 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 12:31:03,572 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 12:31:03,574 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 12:31:03,579 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 12:31:03,579 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 12:31:03,580 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 12:31:03,581 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 12:31:03,582 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 12:31:03,586 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 12:31:03,592 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 12:31:03,592 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 12:31:03,593 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 12:31:03,593 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 12:31:03,599 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 12:31:03,599 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 12:31:03,600 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 12:31:03,600 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 12:31:03,600 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 12:31:03,600 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 12:31:03,600 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 12:31:03,600 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 12:31:03,600 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 12:31:03,600 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 12:31:03,601 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 12:31:03,601 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 12:31:03,601 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 12:31:03,601 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 12:31:03,601 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 12:31:03,601 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 12:31:03,601 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 12:31:03,601 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 12:31:03,601 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 12:31:03,601 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 12:31:03,601 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 12:31:03,602 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 12:31:03,602 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 12:31:03,758 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 12:31:03,772 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 12:31:03,774 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 12:31:03,774 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 12:31:03,775 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 12:31:03,776 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007.c.i.p+lhb-reducer.c [2022-01-31 12:31:03,812 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab3d64201/cbe5dc1331e945febeb783e3fe82ae79/FLAGae370e446 [2022-01-31 12:31:04,190 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 12:31:04,191 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007.c.i.p+lhb-reducer.c [2022-01-31 12:31:04,200 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab3d64201/cbe5dc1331e945febeb783e3fe82ae79/FLAGae370e446 [2022-01-31 12:31:04,208 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab3d64201/cbe5dc1331e945febeb783e3fe82ae79 [2022-01-31 12:31:04,210 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 12:31:04,210 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 12:31:04,211 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 12:31:04,211 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 12:31:04,214 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 12:31:04,214 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 12:31:04" (1/1) ... [2022-01-31 12:31:04,215 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a56eced and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:31:04, skipping insertion in model container [2022-01-31 12:31:04,215 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 12:31:04" (1/1) ... [2022-01-31 12:31:04,219 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 12:31:04,231 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 12:31:04,382 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007.c.i.p+lhb-reducer.c[1613,1626] [2022-01-31 12:31:04,394 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 12:31:04,405 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 12:31:04,433 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007.c.i.p+lhb-reducer.c[1613,1626] [2022-01-31 12:31:04,436 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 12:31:04,447 INFO L208 MainTranslator]: Completed translation [2022-01-31 12:31:04,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:31:04 WrapperNode [2022-01-31 12:31:04,448 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 12:31:04,449 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 12:31:04,449 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 12:31:04,449 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 12:31:04,457 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:31:04" (1/1) ... [2022-01-31 12:31:04,457 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:31:04" (1/1) ... [2022-01-31 12:31:04,462 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:31:04" (1/1) ... [2022-01-31 12:31:04,463 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:31:04" (1/1) ... [2022-01-31 12:31:04,474 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:31:04" (1/1) ... [2022-01-31 12:31:04,478 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:31:04" (1/1) ... [2022-01-31 12:31:04,481 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:31:04" (1/1) ... [2022-01-31 12:31:04,484 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 12:31:04,485 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 12:31:04,485 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 12:31:04,485 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 12:31:04,486 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:31:04" (1/1) ... [2022-01-31 12:31:04,491 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 12:31:04,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:31:04,517 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 12:31:04,535 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 12:31:04,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 12:31:04,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 12:31:04,545 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 12:31:04,545 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 12:31:04,545 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 12:31:04,545 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 12:31:04,545 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 12:31:04,545 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 12:31:04,546 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 12:31:04,546 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 12:31:04,546 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 12:31:04,546 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 12:31:04,546 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 12:31:04,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 12:31:04,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 12:31:04,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 12:31:04,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 12:31:04,549 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 12:31:04,549 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 12:31:04,595 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 12:31:04,596 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 12:31:04,757 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 12:31:04,761 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 12:31:04,762 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-31 12:31:04,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 12:31:04 BoogieIcfgContainer [2022-01-31 12:31:04,763 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 12:31:04,763 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 12:31:04,763 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 12:31:04,764 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 12:31:04,766 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 12:31:04" (1/1) ... [2022-01-31 12:31:04,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 12:31:04 BasicIcfg [2022-01-31 12:31:04,780 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 12:31:04,781 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 12:31:04,781 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 12:31:04,784 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 12:31:04,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 12:31:04" (1/4) ... [2022-01-31 12:31:04,784 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71ab4c89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 12:31:04, skipping insertion in model container [2022-01-31 12:31:04,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:31:04" (2/4) ... [2022-01-31 12:31:04,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71ab4c89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 12:31:04, skipping insertion in model container [2022-01-31 12:31:04,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 12:31:04" (3/4) ... [2022-01-31 12:31:04,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71ab4c89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 12:31:04, skipping insertion in model container [2022-01-31 12:31:04,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 12:31:04" (4/4) ... [2022-01-31 12:31:04,786 INFO L111 eAbstractionObserver]: Analyzing ICFG gj2007.c.i.p+lhb-reducer.cJordan [2022-01-31 12:31:04,789 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 12:31:04,789 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 12:31:04,829 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 12:31:04,839 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 12:31:04,840 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 12:31:04,851 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 28 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 12:31:04,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 12:31:04,869 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:31:04,869 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:31:04,870 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:31:04,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:31:04,874 INFO L85 PathProgramCache]: Analyzing trace with hash 538022728, now seen corresponding path program 1 times [2022-01-31 12:31:04,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:31:04,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207789783] [2022-01-31 12:31:04,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:31:04,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:31:04,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:31:05,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:31:05,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:31:05,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 12:31:05,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:31:05,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207789783] [2022-01-31 12:31:05,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207789783] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 12:31:05,091 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 12:31:05,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 12:31:05,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863171226] [2022-01-31 12:31:05,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 12:31:05,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 12:31:05,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:31:05,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 12:31:05,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 12:31:05,122 INFO L87 Difference]: Start difference. First operand has 33 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 28 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:31:05,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:31:05,312 INFO L93 Difference]: Finished difference Result 53 states and 80 transitions. [2022-01-31 12:31:05,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 12:31:05,314 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-01-31 12:31:05,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:31:05,328 INFO L225 Difference]: With dead ends: 53 [2022-01-31 12:31:05,328 INFO L226 Difference]: Without dead ends: 47 [2022-01-31 12:31:05,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 12:31:05,332 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 60 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 12:31:05,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 22 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 12:31:05,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-01-31 12:31:05,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 30. [2022-01-31 12:31:05,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:31:05,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 40 transitions. [2022-01-31 12:31:05,372 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 40 transitions. Word has length 27 [2022-01-31 12:31:05,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:31:05,372 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 40 transitions. [2022-01-31 12:31:05,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:31:05,373 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 40 transitions. [2022-01-31 12:31:05,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 12:31:05,373 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:31:05,373 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:31:05,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 12:31:05,374 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:31:05,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:31:05,374 INFO L85 PathProgramCache]: Analyzing trace with hash 538052519, now seen corresponding path program 1 times [2022-01-31 12:31:05,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:31:05,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158531691] [2022-01-31 12:31:05,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:31:05,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:31:05,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:31:05,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:31:05,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:31:05,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 12:31:05,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:31:05,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158531691] [2022-01-31 12:31:05,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158531691] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 12:31:05,545 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 12:31:05,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 12:31:05,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600434112] [2022-01-31 12:31:05,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 12:31:05,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 12:31:05,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:31:05,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 12:31:05,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-01-31 12:31:05,547 INFO L87 Difference]: Start difference. First operand 30 states and 40 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:31:05,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:31:05,731 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2022-01-31 12:31:05,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 12:31:05,731 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-01-31 12:31:05,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:31:05,733 INFO L225 Difference]: With dead ends: 30 [2022-01-31 12:31:05,733 INFO L226 Difference]: Without dead ends: 30 [2022-01-31 12:31:05,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2022-01-31 12:31:05,739 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 27 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 12:31:05,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 39 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 12:31:05,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-31 12:31:05,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-01-31 12:31:05,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:31:05,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2022-01-31 12:31:05,747 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 27 [2022-01-31 12:31:05,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:31:05,748 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2022-01-31 12:31:05,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:31:05,748 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2022-01-31 12:31:05,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 12:31:05,750 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:31:05,751 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:31:05,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 12:31:05,755 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:31:05,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:31:05,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1642813573, now seen corresponding path program 1 times [2022-01-31 12:31:05,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:31:05,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193740467] [2022-01-31 12:31:05,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:31:05,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:31:05,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:31:05,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:31:05,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:31:05,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 12:31:05,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:31:05,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193740467] [2022-01-31 12:31:05,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193740467] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 12:31:05,878 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 12:31:05,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 12:31:05,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778158028] [2022-01-31 12:31:05,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 12:31:05,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 12:31:05,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:31:05,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 12:31:05,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-01-31 12:31:05,879 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:31:06,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:31:06,033 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2022-01-31 12:31:06,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 12:31:06,033 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-01-31 12:31:06,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:31:06,035 INFO L225 Difference]: With dead ends: 32 [2022-01-31 12:31:06,035 INFO L226 Difference]: Without dead ends: 32 [2022-01-31 12:31:06,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2022-01-31 12:31:06,040 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 38 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 12:31:06,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 22 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 12:31:06,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-31 12:31:06,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-01-31 12:31:06,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:31:06,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2022-01-31 12:31:06,053 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 29 [2022-01-31 12:31:06,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:31:06,053 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2022-01-31 12:31:06,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:31:06,053 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2022-01-31 12:31:06,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 12:31:06,055 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:31:06,055 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:31:06,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 12:31:06,055 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:31:06,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:31:06,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1833702941, now seen corresponding path program 1 times [2022-01-31 12:31:06,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:31:06,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031978367] [2022-01-31 12:31:06,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:31:06,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:31:06,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:31:06,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:31:06,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:31:06,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 12:31:06,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:31:06,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031978367] [2022-01-31 12:31:06,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031978367] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:31:06,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897551336] [2022-01-31 12:31:06,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:31:06,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:31:06,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:31:06,202 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 12:31:06,215 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 12:31:06,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:31:06,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 12:31:06,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:31:06,363 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 12:31:06,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 12:31:06,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 12:31:06,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897551336] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 12:31:06,637 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 12:31:06,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-01-31 12:31:06,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131715003] [2022-01-31 12:31:06,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 12:31:06,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 12:31:06,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:31:06,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 12:31:06,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 12:31:06,640 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:31:07,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:31:07,021 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2022-01-31 12:31:07,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 12:31:07,022 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-01-31 12:31:07,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:31:07,025 INFO L225 Difference]: With dead ends: 56 [2022-01-31 12:31:07,025 INFO L226 Difference]: Without dead ends: 56 [2022-01-31 12:31:07,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 12:31:07,028 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 92 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 12:31:07,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 17 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 12:31:07,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-01-31 12:31:07,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-01-31 12:31:07,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:31:07,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2022-01-31 12:31:07,032 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 31 [2022-01-31 12:31:07,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:31:07,032 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2022-01-31 12:31:07,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:31:07,032 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2022-01-31 12:31:07,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 12:31:07,033 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:31:07,033 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:31:07,057 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 12:31:07,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:31:07,252 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:31:07,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:31:07,252 INFO L85 PathProgramCache]: Analyzing trace with hash 171106635, now seen corresponding path program 2 times [2022-01-31 12:31:07,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:31:07,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947683931] [2022-01-31 12:31:07,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:31:07,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:31:07,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:31:07,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:31:07,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:31:07,530 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 12:31:07,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:31:07,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947683931] [2022-01-31 12:31:07,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947683931] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:31:07,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368331717] [2022-01-31 12:31:07,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 12:31:07,530 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:31:07,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:31:07,531 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 12:31:07,532 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 12:31:07,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 12:31:07,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 12:31:07,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-31 12:31:07,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:31:07,711 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 12:31:07,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 12:31:08,339 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 12:31:08,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368331717] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 12:31:08,339 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 12:31:08,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-01-31 12:31:08,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236124084] [2022-01-31 12:31:08,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 12:31:08,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 12:31:08,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:31:08,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 12:31:08,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 12:31:08,342 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 50 states, 50 states have (on average 2.06) internal successors, (103), 49 states have internal predecessors, (103), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:31:09,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:31:09,448 INFO L93 Difference]: Finished difference Result 104 states and 105 transitions. [2022-01-31 12:31:09,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 12:31:09,448 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.06) internal successors, (103), 49 states have internal predecessors, (103), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-01-31 12:31:09,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:31:09,449 INFO L225 Difference]: With dead ends: 104 [2022-01-31 12:31:09,449 INFO L226 Difference]: Without dead ends: 104 [2022-01-31 12:31:09,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3433, Invalid=5687, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 12:31:09,452 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 144 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 12:31:09,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 42 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 12:31:09,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-01-31 12:31:09,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-01-31 12:31:09,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 100 states have (on average 1.02) internal successors, (102), 100 states have internal predecessors, (102), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:31:09,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2022-01-31 12:31:09,456 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 55 [2022-01-31 12:31:09,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:31:09,457 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2022-01-31 12:31:09,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.06) internal successors, (103), 49 states have internal predecessors, (103), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:31:09,457 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2022-01-31 12:31:09,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-01-31 12:31:09,458 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:31:09,458 INFO L514 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:31:09,474 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 12:31:09,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:31:09,671 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:31:09,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:31:09,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1936218085, now seen corresponding path program 3 times [2022-01-31 12:31:09,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:31:09,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262236404] [2022-01-31 12:31:09,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:31:09,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:31:09,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:31:10,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:31:10,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:31:10,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 38 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 12:31:10,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:31:10,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262236404] [2022-01-31 12:31:10,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262236404] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:31:10,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71835562] [2022-01-31 12:31:10,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 12:31:10,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:31:10,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:31:10,437 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 12:31:10,438 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 12:31:10,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-31 12:31:10,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 12:31:10,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 12:31:10,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:31:10,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 111 proven. 1 refuted. 0 times theorem prover too weak. 1332 trivial. 0 not checked. [2022-01-31 12:31:10,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 12:31:10,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 111 proven. 1 refuted. 0 times theorem prover too weak. 1332 trivial. 0 not checked. [2022-01-31 12:31:10,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71835562] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 12:31:10,840 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 12:31:10,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 4, 4] total 54 [2022-01-31 12:31:10,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200762175] [2022-01-31 12:31:10,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 12:31:10,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 12:31:10,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:31:10,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 12:31:10,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 12:31:10,843 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand has 54 states, 54 states have (on average 2.4074074074074074) internal successors, (130), 53 states have internal predecessors, (130), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:31:12,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:31:12,116 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2022-01-31 12:31:12,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 12:31:12,117 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.4074074074074074) internal successors, (130), 53 states have internal predecessors, (130), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2022-01-31 12:31:12,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:31:12,118 INFO L225 Difference]: With dead ends: 112 [2022-01-31 12:31:12,118 INFO L226 Difference]: Without dead ends: 112 [2022-01-31 12:31:12,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1321 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 12:31:12,121 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 145 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 12:31:12,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 41 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 12:31:12,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-01-31 12:31:12,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2022-01-31 12:31:12,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 108 states have (on average 1.0462962962962963) internal successors, (113), 108 states have internal predecessors, (113), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:31:12,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2022-01-31 12:31:12,126 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 103 [2022-01-31 12:31:12,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:31:12,126 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2022-01-31 12:31:12,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.4074074074074074) internal successors, (130), 53 states have internal predecessors, (130), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:31:12,126 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2022-01-31 12:31:12,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-01-31 12:31:12,127 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:31:12,127 INFO L514 BasicCegarLoop]: trace histogram [42, 38, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:31:12,144 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 12:31:12,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:31:12,344 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:31:12,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:31:12,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1431719632, now seen corresponding path program 4 times [2022-01-31 12:31:12,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:31:12,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527125576] [2022-01-31 12:31:12,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:31:12,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:31:12,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:31:13,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:31:13,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:31:13,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 273 proven. 1482 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 12:31:13,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:31:13,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527125576] [2022-01-31 12:31:13,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527125576] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:31:13,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448366637] [2022-01-31 12:31:13,148 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 12:31:13,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:31:13,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:31:13,149 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 12:31:13,149 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 12:31:13,194 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 12:31:13,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 12:31:13,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-31 12:31:13,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:31:13,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 273 proven. 1482 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 12:31:13,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 12:31:13,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 273 proven. 1482 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 12:31:13,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448366637] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 12:31:13,671 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 12:31:13,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 54 [2022-01-31 12:31:13,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289672930] [2022-01-31 12:31:13,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 12:31:13,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 12:31:13,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:31:13,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 12:31:13,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 12:31:13,674 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand has 54 states, 54 states have (on average 2.4444444444444446) internal successors, (132), 53 states have internal predecessors, (132), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:31:14,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:31:14,880 INFO L93 Difference]: Finished difference Result 118 states and 122 transitions. [2022-01-31 12:31:14,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 12:31:14,881 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.4444444444444446) internal successors, (132), 53 states have internal predecessors, (132), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2022-01-31 12:31:14,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:31:14,882 INFO L225 Difference]: With dead ends: 118 [2022-01-31 12:31:14,882 INFO L226 Difference]: Without dead ends: 118 [2022-01-31 12:31:14,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 220 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4031, Invalid=6681, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 12:31:14,884 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 101 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 12:31:14,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 22 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 12:31:14,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-01-31 12:31:14,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2022-01-31 12:31:14,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 114 states have (on average 1.043859649122807) internal successors, (119), 114 states have internal predecessors, (119), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:31:14,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 122 transitions. [2022-01-31 12:31:14,889 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 122 transitions. Word has length 111 [2022-01-31 12:31:14,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:31:14,889 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 122 transitions. [2022-01-31 12:31:14,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.4444444444444446) internal successors, (132), 53 states have internal predecessors, (132), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:31:14,889 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 122 transitions. [2022-01-31 12:31:14,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-01-31 12:31:14,890 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:31:14,890 INFO L514 BasicCegarLoop]: trace histogram [45, 41, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:31:14,908 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 12:31:15,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:31:15,099 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:31:15,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:31:15,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1878629302, now seen corresponding path program 5 times [2022-01-31 12:31:15,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:31:15,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604697566] [2022-01-31 12:31:15,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:31:15,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:31:15,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:31:16,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:31:16,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:31:16,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 12:31:16,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:31:16,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604697566] [2022-01-31 12:31:16,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604697566] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:31:16,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015820661] [2022-01-31 12:31:16,069 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 12:31:16,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:31:16,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:31:16,070 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 12:31:16,071 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 12:31:16,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2022-01-31 12:31:16,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 12:31:16,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-31 12:31:16,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:31:16,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 484 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-01-31 12:31:16,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 12:31:18,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 1035 proven. 484 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-01-31 12:31:18,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015820661] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 12:31:18,119 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 12:31:18,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 25, 25] total 99 [2022-01-31 12:31:18,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431442182] [2022-01-31 12:31:18,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 12:31:18,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-01-31 12:31:18,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:31:18,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-01-31 12:31:18,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 12:31:18,124 INFO L87 Difference]: Start difference. First operand 118 states and 122 transitions. Second operand has 99 states, 99 states have (on average 2.2626262626262625) internal successors, (224), 98 states have internal predecessors, (224), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:31:21,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:31:21,952 INFO L93 Difference]: Finished difference Result 202 states and 248 transitions. [2022-01-31 12:31:21,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-31 12:31:21,952 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.2626262626262625) internal successors, (224), 98 states have internal predecessors, (224), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 117 [2022-01-31 12:31:21,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:31:21,954 INFO L225 Difference]: With dead ends: 202 [2022-01-31 12:31:21,954 INFO L226 Difference]: Without dead ends: 202 [2022-01-31 12:31:21,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 239 SyntacticMatches, 1 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4849 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=14259, Invalid=23571, Unknown=0, NotChecked=0, Total=37830 [2022-01-31 12:31:21,957 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 302 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 601 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 601 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 12:31:21,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 46 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [601 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 12:31:21,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-01-31 12:31:21,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2022-01-31 12:31:21,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 198 states have (on average 1.2373737373737375) internal successors, (245), 198 states have internal predecessors, (245), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:31:21,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 248 transitions. [2022-01-31 12:31:21,969 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 248 transitions. Word has length 117 [2022-01-31 12:31:21,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:31:21,970 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 248 transitions. [2022-01-31 12:31:21,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.2626262626262625) internal successors, (224), 98 states have internal predecessors, (224), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:31:21,970 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 248 transitions. [2022-01-31 12:31:21,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-01-31 12:31:21,972 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:31:21,972 INFO L514 BasicCegarLoop]: trace histogram [87, 46, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:31:21,988 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 12:31:22,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:31:22,179 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:31:22,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:31:22,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1130384116, now seen corresponding path program 6 times [2022-01-31 12:31:22,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:31:22,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975459677] [2022-01-31 12:31:22,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:31:22,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:31:22,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:31:24,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:31:24,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:31:24,883 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 12:31:24,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:31:24,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975459677] [2022-01-31 12:31:24,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975459677] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:31:24,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071924660] [2022-01-31 12:31:24,883 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 12:31:24,883 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:31:24,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:31:24,884 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 12:31:24,885 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 12:31:25,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 87 check-sat command(s) [2022-01-31 12:31:25,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 12:31:25,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-31 12:31:25,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:31:25,367 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 3813 proven. 2116 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2022-01-31 12:31:25,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 12:31:25,814 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 3813 proven. 2116 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2022-01-31 12:31:25,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071924660] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 12:31:25,815 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 12:31:25,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 49, 49] total 103 [2022-01-31 12:31:25,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011641652] [2022-01-31 12:31:25,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 12:31:25,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-01-31 12:31:25,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:31:25,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-01-31 12:31:25,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 12:31:25,818 INFO L87 Difference]: Start difference. First operand 202 states and 248 transitions. Second operand has 103 states, 103 states have (on average 2.2233009708737863) internal successors, (229), 102 states have internal predecessors, (229), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:31:30,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:31:30,157 INFO L93 Difference]: Finished difference Result 210 states and 260 transitions. [2022-01-31 12:31:30,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-31 12:31:30,157 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.2233009708737863) internal successors, (229), 102 states have internal predecessors, (229), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 201 [2022-01-31 12:31:30,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:31:30,158 INFO L225 Difference]: With dead ends: 210 [2022-01-31 12:31:30,158 INFO L226 Difference]: Without dead ends: 210 [2022-01-31 12:31:30,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 448 SyntacticMatches, 2 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5096 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=15453, Invalid=25553, Unknown=0, NotChecked=0, Total=41006 [2022-01-31 12:31:30,162 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 238 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 838 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 838 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 12:31:30,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 26 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [838 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 12:31:30,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-01-31 12:31:30,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2022-01-31 12:31:30,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 206 states have (on average 1.2475728155339805) internal successors, (257), 206 states have internal predecessors, (257), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:31:30,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 260 transitions. [2022-01-31 12:31:30,172 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 260 transitions. Word has length 201 [2022-01-31 12:31:30,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:31:30,172 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 260 transitions. [2022-01-31 12:31:30,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.2233009708737863) internal successors, (229), 102 states have internal predecessors, (229), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:31:30,172 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 260 transitions. [2022-01-31 12:31:30,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-01-31 12:31:30,174 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:31:30,174 INFO L514 BasicCegarLoop]: trace histogram [91, 50, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:31:30,193 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 12:31:30,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:31:30,392 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:31:30,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:31:30,392 INFO L85 PathProgramCache]: Analyzing trace with hash 604234368, now seen corresponding path program 7 times [2022-01-31 12:31:30,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:31:30,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036703871] [2022-01-31 12:31:30,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:31:30,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:31:30,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:31:31,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:31:31,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:31:31,582 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 6559 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2022-01-31 12:31:31,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:31:31,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036703871] [2022-01-31 12:31:31,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036703871] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:31:31,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905229846] [2022-01-31 12:31:31,583 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 12:31:31,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:31:31,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:31:31,596 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 12:31:31,597 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 12:31:31,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:31:31,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 105 conjunts are in the unsatisfiable core [2022-01-31 12:31:31,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:31:32,457 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 6559 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2022-01-31 12:31:32,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 12:31:33,281 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 6559 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2022-01-31 12:31:33,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905229846] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 12:31:33,281 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 12:31:33,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 56 [2022-01-31 12:31:33,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330217413] [2022-01-31 12:31:33,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 12:31:33,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 12:31:33,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:31:33,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 12:31:33,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=2970, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 12:31:33,283 INFO L87 Difference]: Start difference. First operand 210 states and 260 transitions. Second operand has 56 states, 56 states have (on average 2.2857142857142856) internal successors, (128), 55 states have internal predecessors, (128), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:31:37,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:31:37,007 INFO L93 Difference]: Finished difference Result 2862 states and 4237 transitions. [2022-01-31 12:31:37,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 12:31:37,011 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.2857142857142856) internal successors, (128), 55 states have internal predecessors, (128), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 209 [2022-01-31 12:31:37,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:31:37,019 INFO L225 Difference]: With dead ends: 2862 [2022-01-31 12:31:37,020 INFO L226 Difference]: Without dead ends: 2861 [2022-01-31 12:31:37,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 414 SyntacticMatches, 5 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1376 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=321, Invalid=11235, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 12:31:37,021 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 180 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 8982 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 9034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 8982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-01-31 12:31:37,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 390 Invalid, 9034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 8982 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-01-31 12:31:37,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2861 states. [2022-01-31 12:31:37,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2861 to 212. [2022-01-31 12:31:37,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 208 states have (on average 1.25) internal successors, (260), 208 states have internal predecessors, (260), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:31:37,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 263 transitions. [2022-01-31 12:31:37,036 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 263 transitions. Word has length 209 [2022-01-31 12:31:37,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:31:37,036 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 263 transitions. [2022-01-31 12:31:37,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.2857142857142856) internal successors, (128), 55 states have internal predecessors, (128), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:31:37,037 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 263 transitions. [2022-01-31 12:31:37,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-01-31 12:31:37,038 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:31:37,038 INFO L514 BasicCegarLoop]: trace histogram [92, 51, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:31:37,061 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 12:31:37,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:31:37,247 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:31:37,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:31:37,248 INFO L85 PathProgramCache]: Analyzing trace with hash 847690173, now seen corresponding path program 8 times [2022-01-31 12:31:37,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:31:37,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787392244] [2022-01-31 12:31:37,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:31:37,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:31:37,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:31:38,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:31:38,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:31:38,142 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 6742 proven. 0 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2022-01-31 12:31:38,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:31:38,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787392244] [2022-01-31 12:31:38,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787392244] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 12:31:38,142 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 12:31:38,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 12:31:38,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388766770] [2022-01-31 12:31:38,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 12:31:38,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 12:31:38,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:31:38,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 12:31:38,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 12:31:38,144 INFO L87 Difference]: Start difference. First operand 212 states and 263 transitions. Second operand has 53 states, 53 states have (on average 2.3962264150943398) internal successors, (127), 52 states have internal predecessors, (127), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:31:39,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:31:39,064 INFO L93 Difference]: Finished difference Result 207 states and 207 transitions. [2022-01-31 12:31:39,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 12:31:39,064 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.3962264150943398) internal successors, (127), 52 states have internal predecessors, (127), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 211 [2022-01-31 12:31:39,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:31:39,064 INFO L225 Difference]: With dead ends: 207 [2022-01-31 12:31:39,064 INFO L226 Difference]: Without dead ends: 0 [2022-01-31 12:31:39,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 12:31:39,066 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 22 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 12:31:39,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 39 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 12:31:39,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-01-31 12:31:39,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-01-31 12:31:39,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-31 12:31:39,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-01-31 12:31:39,067 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 211 [2022-01-31 12:31:39,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:31:39,067 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-01-31 12:31:39,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.3962264150943398) internal successors, (127), 52 states have internal predecessors, (127), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:31:39,067 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-01-31 12:31:39,067 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-01-31 12:31:39,069 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-31 12:31:39,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 12:31:39,071 INFO L732 BasicCegarLoop]: Path program histogram: [8, 1, 1, 1] [2022-01-31 12:31:39,072 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-31 12:31:39,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 12:31:39 BasicIcfg [2022-01-31 12:31:39,073 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-31 12:31:39,074 INFO L158 Benchmark]: Toolchain (without parser) took 34863.44ms. Allocated memory was 192.9MB in the beginning and 314.6MB in the end (delta: 121.6MB). Free memory was 138.4MB in the beginning and 160.8MB in the end (delta: -22.4MB). Peak memory consumption was 99.5MB. Max. memory is 8.0GB. [2022-01-31 12:31:39,074 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 192.9MB. Free memory is still 154.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 12:31:39,074 INFO L158 Benchmark]: CACSL2BoogieTranslator took 236.89ms. Allocated memory was 192.9MB in the beginning and 262.1MB in the end (delta: 69.2MB). Free memory was 138.1MB in the beginning and 232.0MB in the end (delta: -93.9MB). Peak memory consumption was 10.1MB. Max. memory is 8.0GB. [2022-01-31 12:31:39,074 INFO L158 Benchmark]: Boogie Preprocessor took 35.24ms. Allocated memory is still 262.1MB. Free memory was 232.0MB in the beginning and 230.5MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-31 12:31:39,074 INFO L158 Benchmark]: RCFGBuilder took 278.45ms. Allocated memory is still 262.1MB. Free memory was 230.5MB in the beginning and 217.9MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-01-31 12:31:39,075 INFO L158 Benchmark]: IcfgTransformer took 16.79ms. Allocated memory is still 262.1MB. Free memory was 217.9MB in the beginning and 216.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-31 12:31:39,075 INFO L158 Benchmark]: TraceAbstraction took 34292.13ms. Allocated memory was 262.1MB in the beginning and 314.6MB in the end (delta: 52.4MB). Free memory was 215.8MB in the beginning and 160.8MB in the end (delta: 55.0MB). Peak memory consumption was 108.5MB. Max. memory is 8.0GB. [2022-01-31 12:31:39,076 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 192.9MB. Free memory is still 154.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 236.89ms. Allocated memory was 192.9MB in the beginning and 262.1MB in the end (delta: 69.2MB). Free memory was 138.1MB in the beginning and 232.0MB in the end (delta: -93.9MB). Peak memory consumption was 10.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 35.24ms. Allocated memory is still 262.1MB. Free memory was 232.0MB in the beginning and 230.5MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 278.45ms. Allocated memory is still 262.1MB. Free memory was 230.5MB in the beginning and 217.9MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * IcfgTransformer took 16.79ms. Allocated memory is still 262.1MB. Free memory was 217.9MB in the beginning and 216.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 34292.13ms. Allocated memory was 262.1MB in the beginning and 314.6MB in the end (delta: 52.4MB). Free memory was 215.8MB in the beginning and 160.8MB in the end (delta: 55.0MB). Peak memory consumption was 108.5MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 96]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 34.2s, OverallIterations: 11, TraceHistogramMax: 92, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.0s, AutomataDifference: 17.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1349 SdHoareTripleChecker+Valid, 4.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1349 mSDsluCounter, 706 SdHoareTripleChecker+Invalid, 3.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 459 mSDsCounter, 2084 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 10837 IncrementalHoareTripleChecker+Invalid, 12921 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2084 mSolverCounterUnsat, 247 mSDtfsCounter, 10837 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2728 GetRequests, 1730 SyntacticMatches, 9 SemanticMatches, 989 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17151 ImplicationChecksByTransitivity, 21.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=212occurred in iteration=10, InterpolantAutomatonStates: 520, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 2666 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 14.2s InterpolantComputationTime, 1948 NumberOfCodeBlocks, 1876 NumberOfCodeBlocksAsserted, 154 NumberOfCheckSat, 2750 ConstructedInterpolants, 0 QuantifiedInterpolants, 9123 SizeOfPredicates, 2 NumberOfNonLiveVariables, 2053 ConjunctsInSsa, 268 ConjunctsInUnsatCore, 25 InterpolantComputations, 4 PerfectInterpolantSequences, 31437/72314 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-01-31 12:31:39,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...