/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+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 16:07:08,681 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 16:07:08,682 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 16:07:08,705 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-23 16:07:08,706 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-23 16:07:08,706 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-23 16:07:08,708 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-23 16:07:08,709 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-23 16:07:08,710 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-23 16:07:08,711 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-23 16:07:08,712 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-23 16:07:08,712 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-23 16:07:08,713 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 16:07:08,713 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 16:07:08,714 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 16:07:08,715 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 16:07:08,715 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 16:07:08,716 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 16:07:08,717 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 16:07:08,718 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 16:07:08,719 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 16:07:08,720 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 16:07:08,721 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 16:07:08,721 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 16:07:08,723 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-23 16:07:08,728 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 16:07:08,729 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 16:07:08,729 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 16:07:08,730 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-23 16:07:08,735 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 16:07:08,736 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 16:07:08,736 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 16:07:08,736 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-23 16:07:08,737 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 16:07:08,737 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-23 16:07:08,737 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 16:07:08,737 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 16:07:08,737 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 16:07:08,737 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 16:07:08,737 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-23 16:07:08,737 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 16:07:08,737 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 16:07:08,738 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 16:07:08,738 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 16:07:08,738 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 16:07:08,738 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-23 16:07:08,738 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 16:07:08,738 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 16:07:08,738 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 16:07:08,738 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 16:07:08,739 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 16:07:08,739 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 16:07:08,882 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 16:07:08,897 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 16:07:08,899 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 16:07:08,899 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 16:07:08,900 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 16:07:08,900 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007.c.i.p+nlh-reducer.c [2022-02-23 16:07:08,942 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40ddc057e/6019b23b944b4c7f82374ef2d5a9e386/FLAG5672473d2 [2022-02-23 16:07:09,293 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 16:07:09,293 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007.c.i.p+nlh-reducer.c [2022-02-23 16:07:09,301 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40ddc057e/6019b23b944b4c7f82374ef2d5a9e386/FLAG5672473d2 [2022-02-23 16:07:09,724 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40ddc057e/6019b23b944b4c7f82374ef2d5a9e386 [2022-02-23 16:07:09,725 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 16:07:09,726 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 16:07:09,727 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 16:07:09,727 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 16:07:09,739 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 16:07:09,739 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 04:07:09" (1/1) ... [2022-02-23 16:07:09,740 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74d574ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:07:09, skipping insertion in model container [2022-02-23 16:07:09,740 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 04:07:09" (1/1) ... [2022-02-23 16:07:09,747 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 16:07:09,777 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 16:07:09,982 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+nlh-reducer.c[6448,6461] [2022-02-23 16:07:10,047 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 16:07:10,053 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 16:07:10,097 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+nlh-reducer.c[6448,6461] [2022-02-23 16:07:10,148 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 16:07:10,161 INFO L208 MainTranslator]: Completed translation [2022-02-23 16:07:10,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:07:10 WrapperNode [2022-02-23 16:07:10,162 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 16:07:10,163 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 16:07:10,163 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 16:07:10,163 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 16:07:10,184 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:07:10" (1/1) ... [2022-02-23 16:07:10,185 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:07:10" (1/1) ... [2022-02-23 16:07:10,192 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:07:10" (1/1) ... [2022-02-23 16:07:10,193 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:07:10" (1/1) ... [2022-02-23 16:07:10,214 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:07:10" (1/1) ... [2022-02-23 16:07:10,220 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:07:10" (1/1) ... [2022-02-23 16:07:10,222 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:07:10" (1/1) ... [2022-02-23 16:07:10,224 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 16:07:10,225 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 16:07:10,225 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 16:07:10,225 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 16:07:10,226 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:07:10" (1/1) ... [2022-02-23 16:07:10,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 16:07:10,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:07:10,249 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) [2022-02-23 16:07:10,251 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 [2022-02-23 16:07:10,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 16:07:10,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 16:07:10,275 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 16:07:10,275 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 16:07:10,275 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 16:07:10,275 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 16:07:10,275 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 16:07:10,276 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 16:07:10,276 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 16:07:10,276 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 16:07:10,276 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 16:07:10,276 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-23 16:07:10,276 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 16:07:10,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 16:07:10,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 16:07:10,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 16:07:10,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 16:07:10,276 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 16:07:10,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 16:07:10,318 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 16:07:10,319 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 16:07:10,785 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 16:07:10,791 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 16:07:10,791 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-23 16:07:10,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 04:07:10 BoogieIcfgContainer [2022-02-23 16:07:10,793 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 16:07:10,793 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 16:07:10,793 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 16:07:10,794 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 16:07:10,796 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 04:07:10" (1/1) ... [2022-02-23 16:07:10,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 04:07:10 BasicIcfg [2022-02-23 16:07:10,843 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 16:07:10,844 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 16:07:10,844 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 16:07:10,849 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 16:07:10,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 04:07:09" (1/4) ... [2022-02-23 16:07:10,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@659dc0d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 04:07:10, skipping insertion in model container [2022-02-23 16:07:10,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 04:07:10" (2/4) ... [2022-02-23 16:07:10,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@659dc0d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 04:07:10, skipping insertion in model container [2022-02-23 16:07:10,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 04:07:10" (3/4) ... [2022-02-23 16:07:10,851 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@659dc0d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 04:07:10, skipping insertion in model container [2022-02-23 16:07:10,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 04:07:10" (4/4) ... [2022-02-23 16:07:10,852 INFO L111 eAbstractionObserver]: Analyzing ICFG gj2007.c.i.p+nlh-reducer.cJordan [2022-02-23 16:07:10,855 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-23 16:07:10,855 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 16:07:10,893 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 16:07:10,898 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 [2022-02-23 16:07:10,898 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 16:07:10,910 INFO L276 IsEmpty]: Start isEmpty. Operand has 149 states, 143 states have (on average 1.965034965034965) internal successors, (281), 144 states have internal predecessors, (281), 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) [2022-02-23 16:07:10,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-23 16:07:10,921 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:07:10,921 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:07:10,922 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:07:10,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:07:10,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1525673560, now seen corresponding path program 1 times [2022-02-23 16:07:10,938 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:07:10,938 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100883765] [2022-02-23 16:07:10,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:07:10,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:07:11,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:07:11,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:07:11,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:07:11,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:07:11,170 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:07:11,170 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100883765] [2022-02-23 16:07:11,170 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100883765] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 16:07:11,170 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 16:07:11,171 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 16:07:11,172 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714552136] [2022-02-23 16:07:11,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 16:07:11,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 16:07:11,176 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:07:11,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 16:07:11,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 16:07:11,196 INFO L87 Difference]: Start difference. First operand has 149 states, 143 states have (on average 1.965034965034965) internal successors, (281), 144 states have internal predecessors, (281), 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 35.0) internal successors, (140), 3 states have internal predecessors, (140), 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) [2022-02-23 16:07:11,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:07:11,866 INFO L93 Difference]: Finished difference Result 285 states and 486 transitions. [2022-02-23 16:07:11,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 16:07:11,868 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 3 states have internal predecessors, (140), 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 143 [2022-02-23 16:07:11,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:07:11,875 INFO L225 Difference]: With dead ends: 285 [2022-02-23 16:07:11,876 INFO L226 Difference]: Without dead ends: 279 [2022-02-23 16:07:11,877 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 [2022-02-23 16:07:11,879 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 408 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 338 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 338 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-23 16:07:11,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [408 Valid, 22 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [338 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-23 16:07:11,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-02-23 16:07:11,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 146. [2022-02-23 16:07:11,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 142 states have (on average 1.4859154929577465) internal successors, (211), 142 states have internal predecessors, (211), 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) [2022-02-23 16:07:11,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 214 transitions. [2022-02-23 16:07:11,910 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 214 transitions. Word has length 143 [2022-02-23 16:07:11,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:07:11,911 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 214 transitions. [2022-02-23 16:07:11,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 3 states have internal predecessors, (140), 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) [2022-02-23 16:07:11,911 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 214 transitions. [2022-02-23 16:07:11,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-23 16:07:11,912 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:07:11,912 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:07:11,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 16:07:11,913 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:07:11,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:07:11,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1525703351, now seen corresponding path program 1 times [2022-02-23 16:07:11,914 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:07:11,914 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105345867] [2022-02-23 16:07:11,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:07:11,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:07:11,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:07:12,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:07:12,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:07:12,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:07:12,099 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:07:12,099 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105345867] [2022-02-23 16:07:12,099 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105345867] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 16:07:12,100 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 16:07:12,100 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 16:07:12,100 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958644414] [2022-02-23 16:07:12,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 16:07:12,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 16:07:12,101 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:07:12,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 16:07:12,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-23 16:07:12,102 INFO L87 Difference]: Start difference. First operand 146 states and 214 transitions. Second operand has 5 states, 5 states have (on average 28.0) internal successors, (140), 4 states have internal predecessors, (140), 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) [2022-02-23 16:07:12,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:07:12,824 INFO L93 Difference]: Finished difference Result 411 states and 612 transitions. [2022-02-23 16:07:12,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 16:07:12,825 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 4 states have internal predecessors, (140), 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 143 [2022-02-23 16:07:12,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:07:12,830 INFO L225 Difference]: With dead ends: 411 [2022-02-23 16:07:12,830 INFO L226 Difference]: Without dead ends: 411 [2022-02-23 16:07:12,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-23 16:07:12,835 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 539 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 739 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 1215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 739 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-23 16:07:12,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [539 Valid, 16 Invalid, 1215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [739 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-23 16:07:12,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2022-02-23 16:07:12,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 150. [2022-02-23 16:07:12,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 146 states have (on average 1.4863013698630136) internal successors, (217), 146 states have internal predecessors, (217), 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) [2022-02-23 16:07:12,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 220 transitions. [2022-02-23 16:07:12,848 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 220 transitions. Word has length 143 [2022-02-23 16:07:12,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:07:12,850 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 220 transitions. [2022-02-23 16:07:12,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 4 states have internal predecessors, (140), 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) [2022-02-23 16:07:12,850 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 220 transitions. [2022-02-23 16:07:12,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-23 16:07:12,857 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:07:12,857 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:07:12,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-23 16:07:12,857 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:07:12,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:07:12,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1554332502, now seen corresponding path program 1 times [2022-02-23 16:07:12,858 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:07:12,858 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428278383] [2022-02-23 16:07:12,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:07:12,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:07:12,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:07:12,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:07:12,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:07:12,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:07:12,970 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:07:12,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428278383] [2022-02-23 16:07:12,970 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428278383] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 16:07:12,970 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 16:07:12,970 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-23 16:07:12,970 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703414616] [2022-02-23 16:07:12,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 16:07:12,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 16:07:12,971 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:07:12,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 16:07:12,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-23 16:07:12,972 INFO L87 Difference]: Start difference. First operand 150 states and 220 transitions. Second operand has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 5 states have internal predecessors, (140), 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) [2022-02-23 16:07:13,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:07:13,587 INFO L93 Difference]: Finished difference Result 541 states and 807 transitions. [2022-02-23 16:07:13,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 16:07:13,587 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 5 states have internal predecessors, (140), 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 143 [2022-02-23 16:07:13,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:07:13,589 INFO L225 Difference]: With dead ends: 541 [2022-02-23 16:07:13,589 INFO L226 Difference]: Without dead ends: 541 [2022-02-23 16:07:13,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-02-23 16:07:13,590 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 601 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 804 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 601 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 1417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 804 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-23 16:07:13,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [601 Valid, 26 Invalid, 1417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [804 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-23 16:07:13,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2022-02-23 16:07:13,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 156. [2022-02-23 16:07:13,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 152 states have (on average 1.486842105263158) internal successors, (226), 152 states have internal predecessors, (226), 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) [2022-02-23 16:07:13,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 229 transitions. [2022-02-23 16:07:13,605 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 229 transitions. Word has length 143 [2022-02-23 16:07:13,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:07:13,605 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 229 transitions. [2022-02-23 16:07:13,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 5 states have internal predecessors, (140), 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) [2022-02-23 16:07:13,606 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 229 transitions. [2022-02-23 16:07:13,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-23 16:07:13,607 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:07:13,607 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:07:13,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-23 16:07:13,607 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:07:13,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:07:13,607 INFO L85 PathProgramCache]: Analyzing trace with hash -997824459, now seen corresponding path program 1 times [2022-02-23 16:07:13,608 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:07:13,608 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483348044] [2022-02-23 16:07:13,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:07:13,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:07:13,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:07:13,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:07:13,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:07:13,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:07:13,712 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:07:13,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483348044] [2022-02-23 16:07:13,713 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483348044] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 16:07:13,713 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 16:07:13,713 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-23 16:07:13,713 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738475149] [2022-02-23 16:07:13,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 16:07:13,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-23 16:07:13,716 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:07:13,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-23 16:07:13,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-23 16:07:13,717 INFO L87 Difference]: Start difference. First operand 156 states and 229 transitions. Second operand has 7 states, 7 states have (on average 20.0) internal successors, (140), 6 states have internal predecessors, (140), 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) [2022-02-23 16:07:14,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:07:14,533 INFO L93 Difference]: Finished difference Result 669 states and 999 transitions. [2022-02-23 16:07:14,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-23 16:07:14,534 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 6 states have internal predecessors, (140), 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 143 [2022-02-23 16:07:14,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:07:14,536 INFO L225 Difference]: With dead ends: 669 [2022-02-23 16:07:14,536 INFO L226 Difference]: Without dead ends: 669 [2022-02-23 16:07:14,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-02-23 16:07:14,537 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 861 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 1201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 861 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 1940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1201 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-23 16:07:14,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [861 Valid, 21 Invalid, 1940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1201 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-23 16:07:14,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2022-02-23 16:07:14,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 164. [2022-02-23 16:07:14,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 160 states have (on average 1.4875) internal successors, (238), 160 states have internal predecessors, (238), 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) [2022-02-23 16:07:14,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 241 transitions. [2022-02-23 16:07:14,549 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 241 transitions. Word has length 143 [2022-02-23 16:07:14,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:07:14,549 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 241 transitions. [2022-02-23 16:07:14,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.0) internal successors, (140), 6 states have internal predecessors, (140), 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) [2022-02-23 16:07:14,549 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 241 transitions. [2022-02-23 16:07:14,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-23 16:07:14,564 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:07:14,565 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:07:14,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-23 16:07:14,566 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:07:14,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:07:14,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1194337964, now seen corresponding path program 1 times [2022-02-23 16:07:14,566 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:07:14,567 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618510546] [2022-02-23 16:07:14,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:07:14,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:07:14,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:07:14,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:07:14,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:07:14,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:07:14,641 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:07:14,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618510546] [2022-02-23 16:07:14,642 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618510546] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 16:07:14,642 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 16:07:14,642 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-23 16:07:14,642 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263426748] [2022-02-23 16:07:14,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 16:07:14,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-23 16:07:14,643 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:07:14,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-23 16:07:14,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-02-23 16:07:14,643 INFO L87 Difference]: Start difference. First operand 164 states and 241 transitions. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 7 states have internal predecessors, (140), 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) [2022-02-23 16:07:16,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:07:16,007 INFO L93 Difference]: Finished difference Result 795 states and 1188 transitions. [2022-02-23 16:07:16,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-23 16:07:16,008 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 7 states have internal predecessors, (140), 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 143 [2022-02-23 16:07:16,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:07:16,011 INFO L225 Difference]: With dead ends: 795 [2022-02-23 16:07:16,011 INFO L226 Difference]: Without dead ends: 795 [2022-02-23 16:07:16,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-02-23 16:07:16,012 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 1315 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 2121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1315 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 2984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2121 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-23 16:07:16,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1315 Valid, 16 Invalid, 2984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2121 Valid, 863 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-23 16:07:16,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2022-02-23 16:07:16,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 174. [2022-02-23 16:07:16,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 170 states have (on average 1.488235294117647) internal successors, (253), 170 states have internal predecessors, (253), 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) [2022-02-23 16:07:16,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 256 transitions. [2022-02-23 16:07:16,028 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 256 transitions. Word has length 143 [2022-02-23 16:07:16,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:07:16,028 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 256 transitions. [2022-02-23 16:07:16,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 7 states have internal predecessors, (140), 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) [2022-02-23 16:07:16,028 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 256 transitions. [2022-02-23 16:07:16,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-23 16:07:16,029 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:07:16,029 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:07:16,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-23 16:07:16,029 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:07:16,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:07:16,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1065255245, now seen corresponding path program 1 times [2022-02-23 16:07:16,030 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:07:16,030 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864783538] [2022-02-23 16:07:16,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:07:16,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:07:16,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:07:16,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:07:16,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:07:16,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:07:16,129 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:07:16,130 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864783538] [2022-02-23 16:07:16,130 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864783538] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 16:07:16,130 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 16:07:16,130 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-23 16:07:16,130 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715049086] [2022-02-23 16:07:16,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 16:07:16,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-23 16:07:16,131 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:07:16,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-23 16:07:16,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-02-23 16:07:16,131 INFO L87 Difference]: Start difference. First operand 174 states and 256 transitions. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 8 states have internal predecessors, (140), 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) [2022-02-23 16:07:17,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:07:17,479 INFO L93 Difference]: Finished difference Result 919 states and 1374 transitions. [2022-02-23 16:07:17,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 16:07:17,480 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 8 states have internal predecessors, (140), 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 143 [2022-02-23 16:07:17,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:07:17,483 INFO L225 Difference]: With dead ends: 919 [2022-02-23 16:07:17,483 INFO L226 Difference]: Without dead ends: 919 [2022-02-23 16:07:17,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2022-02-23 16:07:17,484 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 1369 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 988 mSolverCounterSat, 2354 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1369 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 3342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2354 IncrementalHoareTripleChecker+Valid, 988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-23 16:07:17,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1369 Valid, 16 Invalid, 3342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2354 Valid, 988 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-23 16:07:17,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2022-02-23 16:07:17,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 186. [2022-02-23 16:07:17,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 182 states have (on average 1.489010989010989) internal successors, (271), 182 states have internal predecessors, (271), 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) [2022-02-23 16:07:17,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 274 transitions. [2022-02-23 16:07:17,490 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 274 transitions. Word has length 143 [2022-02-23 16:07:17,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:07:17,490 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 274 transitions. [2022-02-23 16:07:17,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 8 states have internal predecessors, (140), 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) [2022-02-23 16:07:17,491 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 274 transitions. [2022-02-23 16:07:17,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-23 16:07:17,495 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:07:17,495 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:07:17,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-23 16:07:17,495 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:07:17,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:07:17,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1570813870, now seen corresponding path program 1 times [2022-02-23 16:07:17,495 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:07:17,495 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683940042] [2022-02-23 16:07:17,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:07:17,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:07:17,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:07:17,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:07:17,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:07:17,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:07:17,618 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:07:17,618 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683940042] [2022-02-23 16:07:17,618 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683940042] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 16:07:17,618 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 16:07:17,618 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-23 16:07:17,618 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423364046] [2022-02-23 16:07:17,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 16:07:17,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-23 16:07:17,619 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:07:17,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-23 16:07:17,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-02-23 16:07:17,619 INFO L87 Difference]: Start difference. First operand 186 states and 274 transitions. Second operand has 10 states, 10 states have (on average 14.0) internal successors, (140), 9 states have internal predecessors, (140), 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) [2022-02-23 16:07:19,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:07:19,440 INFO L93 Difference]: Finished difference Result 1041 states and 1557 transitions. [2022-02-23 16:07:19,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-23 16:07:19,441 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 14.0) internal successors, (140), 9 states have internal predecessors, (140), 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 143 [2022-02-23 16:07:19,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:07:19,444 INFO L225 Difference]: With dead ends: 1041 [2022-02-23 16:07:19,444 INFO L226 Difference]: Without dead ends: 1041 [2022-02-23 16:07:19,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2022-02-23 16:07:19,445 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 1426 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1117 mSolverCounterSat, 3042 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1426 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 4159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3042 IncrementalHoareTripleChecker+Valid, 1117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-23 16:07:19,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1426 Valid, 26 Invalid, 4159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3042 Valid, 1117 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-23 16:07:19,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2022-02-23 16:07:19,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 200. [2022-02-23 16:07:19,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 196 states have (on average 1.489795918367347) internal successors, (292), 196 states have internal predecessors, (292), 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) [2022-02-23 16:07:19,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 295 transitions. [2022-02-23 16:07:19,453 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 295 transitions. Word has length 143 [2022-02-23 16:07:19,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:07:19,453 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 295 transitions. [2022-02-23 16:07:19,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.0) internal successors, (140), 9 states have internal predecessors, (140), 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) [2022-02-23 16:07:19,453 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 295 transitions. [2022-02-23 16:07:19,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-23 16:07:19,454 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:07:19,454 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:07:19,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-23 16:07:19,455 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:07:19,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:07:19,455 INFO L85 PathProgramCache]: Analyzing trace with hash -2081348047, now seen corresponding path program 1 times [2022-02-23 16:07:19,455 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:07:19,455 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282924060] [2022-02-23 16:07:19,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:07:19,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:07:19,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:07:19,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:07:19,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:07:19,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:07:19,540 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:07:19,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282924060] [2022-02-23 16:07:19,540 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282924060] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 16:07:19,540 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 16:07:19,540 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-23 16:07:19,540 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019370355] [2022-02-23 16:07:19,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 16:07:19,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-23 16:07:19,541 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:07:19,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-23 16:07:19,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-02-23 16:07:19,542 INFO L87 Difference]: Start difference. First operand 200 states and 295 transitions. Second operand has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 10 states have internal predecessors, (140), 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) [2022-02-23 16:07:21,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:07:21,558 INFO L93 Difference]: Finished difference Result 1161 states and 1737 transitions. [2022-02-23 16:07:21,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-23 16:07:21,559 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 10 states have internal predecessors, (140), 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 143 [2022-02-23 16:07:21,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:07:21,563 INFO L225 Difference]: With dead ends: 1161 [2022-02-23 16:07:21,564 INFO L226 Difference]: Without dead ends: 1161 [2022-02-23 16:07:21,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2022-02-23 16:07:21,564 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 1609 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 3470 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1609 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 4708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3470 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-23 16:07:21,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1609 Valid, 26 Invalid, 4708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3470 Valid, 1238 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-23 16:07:21,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2022-02-23 16:07:21,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 216. [2022-02-23 16:07:21,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 212 states have (on average 1.490566037735849) internal successors, (316), 212 states have internal predecessors, (316), 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) [2022-02-23 16:07:21,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 319 transitions. [2022-02-23 16:07:21,571 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 319 transitions. Word has length 143 [2022-02-23 16:07:21,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:07:21,571 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 319 transitions. [2022-02-23 16:07:21,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.727272727272727) internal successors, (140), 10 states have internal predecessors, (140), 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) [2022-02-23 16:07:21,571 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 319 transitions. [2022-02-23 16:07:21,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-23 16:07:21,572 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:07:21,572 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:07:21,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-23 16:07:21,572 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:07:21,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:07:21,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1216546896, now seen corresponding path program 1 times [2022-02-23 16:07:21,573 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:07:21,573 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701960193] [2022-02-23 16:07:21,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:07:21,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:07:21,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:07:21,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:07:21,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:07:21,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:07:21,662 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:07:21,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701960193] [2022-02-23 16:07:21,662 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701960193] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 16:07:21,662 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 16:07:21,663 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-23 16:07:21,663 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021598583] [2022-02-23 16:07:21,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 16:07:21,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-23 16:07:21,664 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:07:21,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-23 16:07:21,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-02-23 16:07:21,664 INFO L87 Difference]: Start difference. First operand 216 states and 319 transitions. Second operand has 12 states, 12 states have (on average 11.666666666666666) internal successors, (140), 11 states have internal predecessors, (140), 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) [2022-02-23 16:07:23,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:07:23,581 INFO L93 Difference]: Finished difference Result 1279 states and 1914 transitions. [2022-02-23 16:07:23,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-23 16:07:23,581 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 11.666666666666666) internal successors, (140), 11 states have internal predecessors, (140), 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 143 [2022-02-23 16:07:23,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:07:23,585 INFO L225 Difference]: With dead ends: 1279 [2022-02-23 16:07:23,585 INFO L226 Difference]: Without dead ends: 1279 [2022-02-23 16:07:23,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2022-02-23 16:07:23,587 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 1843 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1357 mSolverCounterSat, 2829 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1843 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 4186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2829 IncrementalHoareTripleChecker+Valid, 1357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-02-23 16:07:23,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1843 Valid, 26 Invalid, 4186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2829 Valid, 1357 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-23 16:07:23,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2022-02-23 16:07:23,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 234. [2022-02-23 16:07:23,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 230 states have (on average 1.491304347826087) internal successors, (343), 230 states have internal predecessors, (343), 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) [2022-02-23 16:07:23,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 346 transitions. [2022-02-23 16:07:23,597 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 346 transitions. Word has length 143 [2022-02-23 16:07:23,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:07:23,597 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 346 transitions. [2022-02-23 16:07:23,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.666666666666666) internal successors, (140), 11 states have internal predecessors, (140), 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) [2022-02-23 16:07:23,597 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 346 transitions. [2022-02-23 16:07:23,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-23 16:07:23,598 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:07:23,598 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:07:23,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-23 16:07:23,599 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:07:23,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:07:23,599 INFO L85 PathProgramCache]: Analyzing trace with hash 807722671, now seen corresponding path program 1 times [2022-02-23 16:07:23,599 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:07:23,599 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160197380] [2022-02-23 16:07:23,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:07:23,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:07:23,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:07:23,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:07:23,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:07:23,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:07:23,708 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:07:23,708 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160197380] [2022-02-23 16:07:23,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160197380] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 16:07:23,709 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 16:07:23,709 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-23 16:07:23,709 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849176539] [2022-02-23 16:07:23,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 16:07:23,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-23 16:07:23,709 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:07:23,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-23 16:07:23,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-02-23 16:07:23,710 INFO L87 Difference]: Start difference. First operand 234 states and 346 transitions. Second operand has 13 states, 13 states have (on average 10.76923076923077) internal successors, (140), 12 states have internal predecessors, (140), 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) [2022-02-23 16:07:25,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:07:25,379 INFO L93 Difference]: Finished difference Result 1395 states and 2088 transitions. [2022-02-23 16:07:25,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-23 16:07:25,379 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 10.76923076923077) internal successors, (140), 12 states have internal predecessors, (140), 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 143 [2022-02-23 16:07:25,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:07:25,408 INFO L225 Difference]: With dead ends: 1395 [2022-02-23 16:07:25,408 INFO L226 Difference]: Without dead ends: 1395 [2022-02-23 16:07:25,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2022-02-23 16:07:25,409 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 2275 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1474 mSolverCounterSat, 3994 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2275 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 5468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3994 IncrementalHoareTripleChecker+Valid, 1474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-23 16:07:25,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2275 Valid, 26 Invalid, 5468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3994 Valid, 1474 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-23 16:07:25,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1395 states. [2022-02-23 16:07:25,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1395 to 254. [2022-02-23 16:07:25,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 250 states have (on average 1.492) internal successors, (373), 250 states have internal predecessors, (373), 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) [2022-02-23 16:07:25,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 376 transitions. [2022-02-23 16:07:25,416 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 376 transitions. Word has length 143 [2022-02-23 16:07:25,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:07:25,416 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 376 transitions. [2022-02-23 16:07:25,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.76923076923077) internal successors, (140), 12 states have internal predecessors, (140), 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) [2022-02-23 16:07:25,416 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 376 transitions. [2022-02-23 16:07:25,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-23 16:07:25,417 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:07:25,417 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:07:25,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-23 16:07:25,417 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:07:25,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:07:25,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1230333618, now seen corresponding path program 1 times [2022-02-23 16:07:25,418 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:07:25,418 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835503499] [2022-02-23 16:07:25,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:07:25,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:07:25,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:07:25,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:07:25,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:07:25,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:07:25,535 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:07:25,535 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835503499] [2022-02-23 16:07:25,535 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835503499] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 16:07:25,535 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 16:07:25,536 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-23 16:07:25,536 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330772427] [2022-02-23 16:07:25,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 16:07:25,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-23 16:07:25,537 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:07:25,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-23 16:07:25,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-02-23 16:07:25,537 INFO L87 Difference]: Start difference. First operand 254 states and 376 transitions. Second operand has 14 states, 14 states have (on average 10.0) internal successors, (140), 13 states have internal predecessors, (140), 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) [2022-02-23 16:07:27,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:07:27,744 INFO L93 Difference]: Finished difference Result 1509 states and 2259 transitions. [2022-02-23 16:07:27,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-23 16:07:27,745 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 10.0) internal successors, (140), 13 states have internal predecessors, (140), 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 143 [2022-02-23 16:07:27,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:07:27,748 INFO L225 Difference]: With dead ends: 1509 [2022-02-23 16:07:27,748 INFO L226 Difference]: Without dead ends: 1509 [2022-02-23 16:07:27,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2022-02-23 16:07:27,749 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 2184 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1592 mSolverCounterSat, 3422 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2184 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 5014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3422 IncrementalHoareTripleChecker+Valid, 1592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-02-23 16:07:27,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2184 Valid, 31 Invalid, 5014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3422 Valid, 1592 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-02-23 16:07:27,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1509 states. [2022-02-23 16:07:27,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1509 to 276. [2022-02-23 16:07:27,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 272 states have (on average 1.4926470588235294) internal successors, (406), 272 states have internal predecessors, (406), 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) [2022-02-23 16:07:27,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 409 transitions. [2022-02-23 16:07:27,755 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 409 transitions. Word has length 143 [2022-02-23 16:07:27,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:07:27,756 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 409 transitions. [2022-02-23 16:07:27,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.0) internal successors, (140), 13 states have internal predecessors, (140), 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) [2022-02-23 16:07:27,756 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 409 transitions. [2022-02-23 16:07:27,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-23 16:07:27,757 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:07:27,757 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:07:27,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-23 16:07:27,757 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:07:27,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:07:27,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1297340371, now seen corresponding path program 1 times [2022-02-23 16:07:27,757 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:07:27,757 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656018657] [2022-02-23 16:07:27,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:07:27,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:07:27,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:07:27,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:07:27,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:07:27,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:07:27,879 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:07:27,879 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656018657] [2022-02-23 16:07:27,879 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656018657] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 16:07:27,879 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 16:07:27,879 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-23 16:07:27,879 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723086100] [2022-02-23 16:07:27,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 16:07:27,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-23 16:07:27,880 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:07:27,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-23 16:07:27,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2022-02-23 16:07:27,880 INFO L87 Difference]: Start difference. First operand 276 states and 409 transitions. Second operand has 15 states, 15 states have (on average 9.333333333333334) internal successors, (140), 14 states have internal predecessors, (140), 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) [2022-02-23 16:07:30,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:07:30,568 INFO L93 Difference]: Finished difference Result 1621 states and 2427 transitions. [2022-02-23 16:07:30,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-23 16:07:30,568 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 9.333333333333334) internal successors, (140), 14 states have internal predecessors, (140), 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 143 [2022-02-23 16:07:30,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:07:30,572 INFO L225 Difference]: With dead ends: 1621 [2022-02-23 16:07:30,572 INFO L226 Difference]: Without dead ends: 1621 [2022-02-23 16:07:30,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2022-02-23 16:07:30,573 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 2699 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1702 mSolverCounterSat, 6259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2699 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 7961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6259 IncrementalHoareTripleChecker+Valid, 1702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-02-23 16:07:30,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2699 Valid, 26 Invalid, 7961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6259 Valid, 1702 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-02-23 16:07:30,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2022-02-23 16:07:30,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 300. [2022-02-23 16:07:30,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 296 states have (on average 1.4932432432432432) internal successors, (442), 296 states have internal predecessors, (442), 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) [2022-02-23 16:07:30,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 445 transitions. [2022-02-23 16:07:30,580 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 445 transitions. Word has length 143 [2022-02-23 16:07:30,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:07:30,580 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 445 transitions. [2022-02-23 16:07:30,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 9.333333333333334) internal successors, (140), 14 states have internal predecessors, (140), 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) [2022-02-23 16:07:30,581 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 445 transitions. [2022-02-23 16:07:30,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-23 16:07:30,581 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:07:30,582 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:07:30,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-23 16:07:30,582 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:07:30,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:07:30,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1266320564, now seen corresponding path program 1 times [2022-02-23 16:07:30,582 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:07:30,582 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89617343] [2022-02-23 16:07:30,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:07:30,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:07:30,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:07:30,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:07:30,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:07:30,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:07:30,679 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:07:30,679 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89617343] [2022-02-23 16:07:30,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89617343] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 16:07:30,679 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 16:07:30,679 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-23 16:07:30,679 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320313437] [2022-02-23 16:07:30,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 16:07:30,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-23 16:07:30,679 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:07:30,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-23 16:07:30,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-02-23 16:07:30,680 INFO L87 Difference]: Start difference. First operand 300 states and 445 transitions. Second operand has 16 states, 16 states have (on average 8.75) internal successors, (140), 15 states have internal predecessors, (140), 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) [2022-02-23 16:07:32,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:07:32,657 INFO L93 Difference]: Finished difference Result 1731 states and 2592 transitions. [2022-02-23 16:07:32,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-23 16:07:32,658 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.75) internal successors, (140), 15 states have internal predecessors, (140), 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 143 [2022-02-23 16:07:32,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:07:32,662 INFO L225 Difference]: With dead ends: 1731 [2022-02-23 16:07:32,662 INFO L226 Difference]: Without dead ends: 1731 [2022-02-23 16:07:32,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2022-02-23 16:07:32,668 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 2599 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1816 mSolverCounterSat, 4847 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2599 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 6663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4847 IncrementalHoareTripleChecker+Valid, 1816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-02-23 16:07:32,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2599 Valid, 31 Invalid, 6663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4847 Valid, 1816 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-23 16:07:32,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1731 states. [2022-02-23 16:07:32,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1731 to 326. [2022-02-23 16:07:32,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 322 states have (on average 1.4937888198757765) internal successors, (481), 322 states have internal predecessors, (481), 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) [2022-02-23 16:07:32,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 484 transitions. [2022-02-23 16:07:32,705 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 484 transitions. Word has length 143 [2022-02-23 16:07:32,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:07:32,706 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 484 transitions. [2022-02-23 16:07:32,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.75) internal successors, (140), 15 states have internal predecessors, (140), 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) [2022-02-23 16:07:32,706 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 484 transitions. [2022-02-23 16:07:32,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-23 16:07:32,707 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:07:32,707 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:07:32,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-23 16:07:32,708 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:07:32,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:07:32,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1521057109, now seen corresponding path program 1 times [2022-02-23 16:07:32,708 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:07:32,708 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242032099] [2022-02-23 16:07:32,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:07:32,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:07:32,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:07:32,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:07:32,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:07:32,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:07:32,856 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:07:32,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242032099] [2022-02-23 16:07:32,856 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242032099] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 16:07:32,856 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 16:07:32,856 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-23 16:07:32,856 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6480807] [2022-02-23 16:07:32,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 16:07:32,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-23 16:07:32,857 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:07:32,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-23 16:07:32,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2022-02-23 16:07:32,858 INFO L87 Difference]: Start difference. First operand 326 states and 484 transitions. Second operand has 17 states, 17 states have (on average 8.235294117647058) internal successors, (140), 16 states have internal predecessors, (140), 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) [2022-02-23 16:07:35,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:07:35,290 INFO L93 Difference]: Finished difference Result 1839 states and 2754 transitions. [2022-02-23 16:07:35,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-23 16:07:35,291 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 8.235294117647058) internal successors, (140), 16 states have internal predecessors, (140), 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 143 [2022-02-23 16:07:35,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:07:35,295 INFO L225 Difference]: With dead ends: 1839 [2022-02-23 16:07:35,295 INFO L226 Difference]: Without dead ends: 1839 [2022-02-23 16:07:35,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2022-02-23 16:07:35,297 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 2839 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1928 mSolverCounterSat, 6940 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2839 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 8868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6940 IncrementalHoareTripleChecker+Valid, 1928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-02-23 16:07:35,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2839 Valid, 36 Invalid, 8868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6940 Valid, 1928 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-02-23 16:07:35,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1839 states. [2022-02-23 16:07:35,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1839 to 354. [2022-02-23 16:07:35,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 350 states have (on average 1.4942857142857142) internal successors, (523), 350 states have internal predecessors, (523), 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) [2022-02-23 16:07:35,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 526 transitions. [2022-02-23 16:07:35,328 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 526 transitions. Word has length 143 [2022-02-23 16:07:35,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:07:35,328 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 526 transitions. [2022-02-23 16:07:35,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 8.235294117647058) internal successors, (140), 16 states have internal predecessors, (140), 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) [2022-02-23 16:07:35,329 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 526 transitions. [2022-02-23 16:07:35,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-23 16:07:35,330 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:07:35,330 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:07:35,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-23 16:07:35,330 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:07:35,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:07:35,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1509740982, now seen corresponding path program 1 times [2022-02-23 16:07:35,331 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:07:35,331 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714014231] [2022-02-23 16:07:35,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:07:35,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:07:35,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:07:35,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:07:35,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:07:35,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:07:35,501 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:07:35,502 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714014231] [2022-02-23 16:07:35,502 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714014231] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 16:07:35,502 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 16:07:35,502 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-23 16:07:35,502 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147459390] [2022-02-23 16:07:35,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 16:07:35,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-23 16:07:35,502 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:07:35,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-23 16:07:35,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-02-23 16:07:35,503 INFO L87 Difference]: Start difference. First operand 354 states and 526 transitions. Second operand has 18 states, 18 states have (on average 7.777777777777778) internal successors, (140), 17 states have internal predecessors, (140), 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) [2022-02-23 16:07:38,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:07:38,652 INFO L93 Difference]: Finished difference Result 1945 states and 2913 transitions. [2022-02-23 16:07:38,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-23 16:07:38,652 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 7.777777777777778) internal successors, (140), 17 states have internal predecessors, (140), 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 143 [2022-02-23 16:07:38,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:07:38,656 INFO L225 Difference]: With dead ends: 1945 [2022-02-23 16:07:38,656 INFO L226 Difference]: Without dead ends: 1945 [2022-02-23 16:07:38,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2022-02-23 16:07:38,659 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 2802 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 2032 mSolverCounterSat, 5396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2802 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 7428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5396 IncrementalHoareTripleChecker+Valid, 2032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-02-23 16:07:38,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2802 Valid, 31 Invalid, 7428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5396 Valid, 2032 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-02-23 16:07:38,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1945 states. [2022-02-23 16:07:38,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1945 to 384. [2022-02-23 16:07:38,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 380 states have (on average 1.4947368421052631) internal successors, (568), 380 states have internal predecessors, (568), 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) [2022-02-23 16:07:38,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 571 transitions. [2022-02-23 16:07:38,688 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 571 transitions. Word has length 143 [2022-02-23 16:07:38,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:07:38,689 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 571 transitions. [2022-02-23 16:07:38,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.777777777777778) internal successors, (140), 17 states have internal predecessors, (140), 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) [2022-02-23 16:07:38,689 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 571 transitions. [2022-02-23 16:07:38,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-23 16:07:38,690 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:07:38,690 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:07:38,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-23 16:07:38,690 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:07:38,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:07:38,690 INFO L85 PathProgramCache]: Analyzing trace with hash 775122473, now seen corresponding path program 1 times [2022-02-23 16:07:38,690 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:07:38,691 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576067825] [2022-02-23 16:07:38,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:07:38,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:07:38,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:07:38,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:07:38,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:07:38,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:07:38,890 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:07:38,890 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576067825] [2022-02-23 16:07:38,891 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576067825] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 16:07:38,891 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 16:07:38,891 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-23 16:07:38,891 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192948480] [2022-02-23 16:07:38,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 16:07:38,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-23 16:07:38,892 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:07:38,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-23 16:07:38,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2022-02-23 16:07:38,893 INFO L87 Difference]: Start difference. First operand 384 states and 571 transitions. Second operand has 19 states, 19 states have (on average 7.368421052631579) internal successors, (140), 18 states have internal predecessors, (140), 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) [2022-02-23 16:07:41,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:07:41,590 INFO L93 Difference]: Finished difference Result 2049 states and 3069 transitions. [2022-02-23 16:07:41,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-23 16:07:41,590 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 7.368421052631579) internal successors, (140), 18 states have internal predecessors, (140), 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 143 [2022-02-23 16:07:41,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:07:41,594 INFO L225 Difference]: With dead ends: 2049 [2022-02-23 16:07:41,594 INFO L226 Difference]: Without dead ends: 2049 [2022-02-23 16:07:41,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2022-02-23 16:07:41,596 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 3463 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 2134 mSolverCounterSat, 6229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3463 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 8363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6229 IncrementalHoareTripleChecker+Valid, 2134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-02-23 16:07:41,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3463 Valid, 26 Invalid, 8363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6229 Valid, 2134 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-02-23 16:07:41,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2049 states. [2022-02-23 16:07:41,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2049 to 416. [2022-02-23 16:07:41,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 412 states have (on average 1.4951456310679612) internal successors, (616), 412 states have internal predecessors, (616), 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) [2022-02-23 16:07:41,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 619 transitions. [2022-02-23 16:07:41,604 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 619 transitions. Word has length 143 [2022-02-23 16:07:41,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:07:41,604 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 619 transitions. [2022-02-23 16:07:41,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.368421052631579) internal successors, (140), 18 states have internal predecessors, (140), 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) [2022-02-23 16:07:41,604 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 619 transitions. [2022-02-23 16:07:41,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-23 16:07:41,605 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:07:41,605 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:07:41,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-23 16:07:41,605 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:07:41,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:07:41,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1800614472, now seen corresponding path program 1 times [2022-02-23 16:07:41,606 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:07:41,606 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103868332] [2022-02-23 16:07:41,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:07:41,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:07:41,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:07:42,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:07:42,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:07:42,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:07:42,500 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:07:42,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103868332] [2022-02-23 16:07:42,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103868332] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 16:07:42,500 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 16:07:42,501 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-02-23 16:07:42,501 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608123771] [2022-02-23 16:07:42,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 16:07:42,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-23 16:07:42,501 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:07:42,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-23 16:07:42,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1330, Invalid=1532, Unknown=0, NotChecked=0, Total=2862 [2022-02-23 16:07:42,502 INFO L87 Difference]: Start difference. First operand 416 states and 619 transitions. Second operand has 54 states, 54 states have (on average 2.5925925925925926) internal successors, (140), 53 states have internal predecessors, (140), 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) [2022-02-23 16:07:43,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:07:43,523 INFO L93 Difference]: Finished difference Result 241 states and 290 transitions. [2022-02-23 16:07:43,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-23 16:07:43,523 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.5925925925925926) internal successors, (140), 53 states have internal predecessors, (140), 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 143 [2022-02-23 16:07:43,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:07:43,524 INFO L225 Difference]: With dead ends: 241 [2022-02-23 16:07:43,524 INFO L226 Difference]: Without dead ends: 241 [2022-02-23 16:07:43,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1371 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3984, Invalid=6936, Unknown=0, NotChecked=0, Total=10920 [2022-02-23 16:07:43,527 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 559 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 886 mSolverCounterSat, 724 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 1610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 724 IncrementalHoareTripleChecker+Valid, 886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-23 16:07:43,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [559 Valid, 30 Invalid, 1610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [724 Valid, 886 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-23 16:07:43,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-02-23 16:07:43,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2022-02-23 16:07:43,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 237 states have (on average 1.2109704641350212) internal successors, (287), 237 states have internal predecessors, (287), 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) [2022-02-23 16:07:43,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 290 transitions. [2022-02-23 16:07:43,532 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 290 transitions. Word has length 143 [2022-02-23 16:07:43,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:07:43,532 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 290 transitions. [2022-02-23 16:07:43,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.5925925925925926) internal successors, (140), 53 states have internal predecessors, (140), 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) [2022-02-23 16:07:43,532 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 290 transitions. [2022-02-23 16:07:43,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-23 16:07:43,533 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:07:43,533 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:07:43,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-23 16:07:43,534 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:07:43,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:07:43,534 INFO L85 PathProgramCache]: Analyzing trace with hash -544052569, now seen corresponding path program 1 times [2022-02-23 16:07:43,534 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:07:43,534 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904444578] [2022-02-23 16:07:43,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:07:43,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:07:43,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:07:44,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:07:44,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:07:44,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:07:44,864 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:07:44,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904444578] [2022-02-23 16:07:44,864 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904444578] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 16:07:44,864 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 16:07:44,864 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-02-23 16:07:44,864 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133579795] [2022-02-23 16:07:44,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 16:07:44,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-02-23 16:07:44,866 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:07:44,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-02-23 16:07:44,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2022-02-23 16:07:44,867 INFO L87 Difference]: Start difference. First operand 241 states and 290 transitions. Second operand has 71 states, 71 states have (on average 1.971830985915493) internal successors, (140), 70 states have internal predecessors, (140), 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) [2022-02-23 16:07:46,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:07:46,429 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2022-02-23 16:07:46,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-02-23 16:07:46,430 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.971830985915493) internal successors, (140), 70 states have internal predecessors, (140), 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 143 [2022-02-23 16:07:46,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:07:46,430 INFO L225 Difference]: With dead ends: 147 [2022-02-23 16:07:46,430 INFO L226 Difference]: Without dead ends: 147 [2022-02-23 16:07:46,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=7245, Invalid=11937, Unknown=0, NotChecked=0, Total=19182 [2022-02-23 16:07:46,434 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 337 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 380 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 16:07:46,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 31 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 16:07:46,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-02-23 16:07:46,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2022-02-23 16:07:46,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 142 states have (on average 1.0070422535211268) internal successors, (143), 142 states have internal predecessors, (143), 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) [2022-02-23 16:07:46,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2022-02-23 16:07:46,436 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 143 [2022-02-23 16:07:46,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:07:46,436 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2022-02-23 16:07:46,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.971830985915493) internal successors, (140), 70 states have internal predecessors, (140), 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) [2022-02-23 16:07:46,436 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2022-02-23 16:07:46,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-02-23 16:07:46,437 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:07:46,437 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:07:46,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-23 16:07:46,437 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:07:46,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:07:46,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1150564772, now seen corresponding path program 1 times [2022-02-23 16:07:46,438 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:07:46,438 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750251813] [2022-02-23 16:07:46,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:07:46,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:07:46,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:07:47,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:07:47,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:07:47,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:07:47,405 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:07:47,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750251813] [2022-02-23 16:07:47,405 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750251813] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:07:47,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722230344] [2022-02-23 16:07:47,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:07:47,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:07:47,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:07:47,407 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) [2022-02-23 16:07:47,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 16:07:47,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:07:47,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 70 conjunts are in the unsatisfiable core [2022-02-23 16:07:47,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:07:47,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:07:47,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:07:49,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:07:49,717 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722230344] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:07:49,717 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:07:49,717 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 71, 71] total 104 [2022-02-23 16:07:49,717 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070443851] [2022-02-23 16:07:49,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:07:49,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-02-23 16:07:49,718 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:07:49,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-02-23 16:07:49,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-02-23 16:07:49,721 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand has 104 states, 104 states have (on average 2.730769230769231) internal successors, (284), 103 states have internal predecessors, (284), 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) [2022-02-23 16:07:53,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:07:53,656 INFO L93 Difference]: Finished difference Result 210 states and 210 transitions. [2022-02-23 16:07:53,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-02-23 16:07:53,656 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.730769230769231) internal successors, (284), 103 states have internal predecessors, (284), 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 145 [2022-02-23 16:07:53,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:07:53,657 INFO L225 Difference]: With dead ends: 210 [2022-02-23 16:07:53,657 INFO L226 Difference]: Without dead ends: 210 [2022-02-23 16:07:53,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 259 SyntacticMatches, 1 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5780 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=15556, Invalid=25856, Unknown=0, NotChecked=0, Total=41412 [2022-02-23 16:07:53,660 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 526 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 521 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 1183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 521 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-23 16:07:53,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [526 Valid, 26 Invalid, 1183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [521 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-23 16:07:53,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-02-23 16:07:53,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2022-02-23 16:07:53,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 206 states have (on average 1.0048543689320388) internal successors, (207), 206 states have internal predecessors, (207), 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) [2022-02-23 16:07:53,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 210 transitions. [2022-02-23 16:07:53,663 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 210 transitions. Word has length 145 [2022-02-23 16:07:53,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:07:53,663 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 210 transitions. [2022-02-23 16:07:53,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.730769230769231) internal successors, (284), 103 states have internal predecessors, (284), 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) [2022-02-23 16:07:53,663 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 210 transitions. [2022-02-23 16:07:53,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-02-23 16:07:53,664 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:07:53,664 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:07:53,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-23 16:07:53,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:07:53,881 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:07:53,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:07:53,881 INFO L85 PathProgramCache]: Analyzing trace with hash 163308868, now seen corresponding path program 2 times [2022-02-23 16:07:53,882 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:07:53,882 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430055966] [2022-02-23 16:07:53,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:07:53,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:07:53,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:07:55,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:07:55,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:07:55,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:07:55,105 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:07:55,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430055966] [2022-02-23 16:07:55,105 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430055966] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 16:07:55,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074436239] [2022-02-23 16:07:55,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 16:07:55,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 16:07:55,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 16:07:55,106 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) [2022-02-23 16:07:55,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 16:07:55,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 16:07:55,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 16:07:55,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 105 conjunts are in the unsatisfiable core [2022-02-23 16:07:55,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 16:07:55,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:07:55,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 16:07:56,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:07:56,438 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074436239] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 16:07:56,438 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 16:07:56,438 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 56 [2022-02-23 16:07:56,438 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809606181] [2022-02-23 16:07:56,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 16:07:56,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-02-23 16:07:56,440 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:07:56,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-02-23 16:07:56,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=2970, Unknown=0, NotChecked=0, Total=3080 [2022-02-23 16:07:56,440 INFO L87 Difference]: Start difference. First operand 210 states and 210 transitions. Second operand has 56 states, 56 states have (on average 3.732142857142857) internal successors, (209), 55 states have internal predecessors, (209), 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) [2022-02-23 16:07:59,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:07:59,895 INFO L93 Difference]: Finished difference Result 214 states and 214 transitions. [2022-02-23 16:07:59,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-23 16:07:59,896 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.732142857142857) internal successors, (209), 55 states have internal predecessors, (209), 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 [2022-02-23 16:07:59,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:07:59,904 INFO L225 Difference]: With dead ends: 214 [2022-02-23 16:07:59,904 INFO L226 Difference]: Without dead ends: 213 [2022-02-23 16:07:59,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 414 SyntacticMatches, 5 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1376 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=321, Invalid=11235, Unknown=0, NotChecked=0, Total=11556 [2022-02-23 16:07:59,906 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 160 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 10769 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 10821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 10769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-02-23 16:07:59,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 426 Invalid, 10821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 10769 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-02-23 16:07:59,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-02-23 16:07:59,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 212. [2022-02-23 16:07:59,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 208 states have (on average 1.0048076923076923) internal successors, (209), 208 states have internal predecessors, (209), 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) [2022-02-23 16:07:59,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 212 transitions. [2022-02-23 16:07:59,919 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 212 transitions. Word has length 209 [2022-02-23 16:07:59,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:07:59,919 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 212 transitions. [2022-02-23 16:07:59,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.732142857142857) internal successors, (209), 55 states have internal predecessors, (209), 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) [2022-02-23 16:07:59,919 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 212 transitions. [2022-02-23 16:07:59,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-02-23 16:07:59,921 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 16:07:59,921 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:07:59,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-23 16:08:00,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2022-02-23 16:08:00,140 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 16:08:00,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 16:08:00,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1974894335, now seen corresponding path program 3 times [2022-02-23 16:08:00,140 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 16:08:00,140 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986015852] [2022-02-23 16:08:00,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 16:08:00,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 16:08:00,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:08:01,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 16:08:01,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 16:08:01,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 1156 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 16:08:01,041 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 16:08:01,041 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986015852] [2022-02-23 16:08:01,041 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986015852] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 16:08:01,041 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 16:08:01,041 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-02-23 16:08:01,041 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104236582] [2022-02-23 16:08:01,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 16:08:01,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-23 16:08:01,041 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 16:08:01,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-23 16:08:01,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-02-23 16:08:01,042 INFO L87 Difference]: Start difference. First operand 212 states and 212 transitions. Second operand has 53 states, 53 states have (on average 3.9245283018867925) internal successors, (208), 52 states have internal predecessors, (208), 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) [2022-02-23 16:08:01,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 16:08:01,981 INFO L93 Difference]: Finished difference Result 207 states and 206 transitions. [2022-02-23 16:08:01,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-23 16:08:01,982 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.9245283018867925) internal successors, (208), 52 states have internal predecessors, (208), 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 [2022-02-23 16:08:01,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 16:08:01,982 INFO L225 Difference]: With dead ends: 207 [2022-02-23 16:08:01,982 INFO L226 Difference]: Without dead ends: 0 [2022-02-23 16:08:01,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2022-02-23 16:08:01,984 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 179 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-23 16:08:01,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 125 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-23 16:08:01,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-23 16:08:01,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-23 16:08:01,985 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) [2022-02-23 16:08:01,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-23 16:08:01,985 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 211 [2022-02-23 16:08:01,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 16:08:01,985 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-23 16:08:01,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.9245283018867925) internal successors, (208), 52 states have internal predecessors, (208), 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) [2022-02-23 16:08:01,985 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-23 16:08:01,985 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-23 16:08:01,987 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-23 16:08:01,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-23 16:08:01,990 INFO L732 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 16:08:01,991 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-23 16:08:01,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 04:08:01 BasicIcfg [2022-02-23 16:08:01,997 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-23 16:08:01,997 INFO L158 Benchmark]: Toolchain (without parser) took 52270.97ms. Allocated memory was 210.8MB in the beginning and 398.5MB in the end (delta: 187.7MB). Free memory was 184.4MB in the beginning and 305.2MB in the end (delta: -120.8MB). Peak memory consumption was 66.7MB. Max. memory is 8.0GB. [2022-02-23 16:08:01,997 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 210.8MB. Free memory is still 171.6MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-23 16:08:01,998 INFO L158 Benchmark]: CACSL2BoogieTranslator took 435.23ms. Allocated memory is still 210.8MB. Free memory was 184.2MB in the beginning and 174.8MB in the end (delta: 9.4MB). Peak memory consumption was 12.0MB. Max. memory is 8.0GB. [2022-02-23 16:08:01,998 INFO L158 Benchmark]: Boogie Preprocessor took 61.69ms. Allocated memory is still 210.8MB. Free memory was 174.8MB in the beginning and 172.1MB in the end (delta: 2.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2022-02-23 16:08:01,998 INFO L158 Benchmark]: RCFGBuilder took 567.82ms. Allocated memory is still 210.8MB. Free memory was 172.1MB in the beginning and 133.3MB in the end (delta: 38.8MB). Peak memory consumption was 38.8MB. Max. memory is 8.0GB. [2022-02-23 16:08:01,998 INFO L158 Benchmark]: IcfgTransformer took 49.87ms. Allocated memory is still 210.8MB. Free memory was 133.3MB in the beginning and 128.1MB in the end (delta: 5.2MB). Peak memory consumption was 5.2MB. Max. memory is 8.0GB. [2022-02-23 16:08:01,998 INFO L158 Benchmark]: TraceAbstraction took 51152.81ms. Allocated memory was 210.8MB in the beginning and 398.5MB in the end (delta: 187.7MB). Free memory was 127.6MB in the beginning and 305.2MB in the end (delta: -177.6MB). Peak memory consumption was 11.7MB. Max. memory is 8.0GB. [2022-02-23 16:08:02,001 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 210.8MB. Free memory is still 171.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 435.23ms. Allocated memory is still 210.8MB. Free memory was 184.2MB in the beginning and 174.8MB in the end (delta: 9.4MB). Peak memory consumption was 12.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 61.69ms. Allocated memory is still 210.8MB. Free memory was 174.8MB in the beginning and 172.1MB in the end (delta: 2.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * RCFGBuilder took 567.82ms. Allocated memory is still 210.8MB. Free memory was 172.1MB in the beginning and 133.3MB in the end (delta: 38.8MB). Peak memory consumption was 38.8MB. Max. memory is 8.0GB. * IcfgTransformer took 49.87ms. Allocated memory is still 210.8MB. Free memory was 133.3MB in the beginning and 128.1MB in the end (delta: 5.2MB). Peak memory consumption was 5.2MB. Max. memory is 8.0GB. * TraceAbstraction took 51152.81ms. Allocated memory was 210.8MB in the beginning and 398.5MB in the end (delta: 187.7MB). Free memory was 127.6MB in the beginning and 305.2MB in the end (delta: -177.6MB). Peak memory consumption was 11.7MB. 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: 444]: 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, 149 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 51.1s, OverallIterations: 21, TraceHistogramMax: 34, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.1s, AutomataDifference: 39.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 30593 SdHoareTripleChecker+Valid, 29.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 30593 mSDsluCounter, 1040 SdHoareTripleChecker+Invalid, 24.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 599 mSDsCounter, 55746 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 34166 IncrementalHoareTripleChecker+Invalid, 89912 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 55746 mSolverCounterUnsat, 441 mSDtfsCounter, 34166 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1809 GetRequests, 866 SyntacticMatches, 6 SemanticMatches, 937 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12897 ImplicationChecksByTransitivity, 15.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=416occurred in iteration=16, 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: 0.2s AutomataMinimizationTime, 21 MinimizatonAttempts, 15250 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 10.1s InterpolantComputationTime, 3493 NumberOfCodeBlocks, 3493 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 3822 ConstructedInterpolants, 0 QuantifiedInterpolants, 9705 SizeOfPredicates, 2 NumberOfNonLiveVariables, 938 ConjunctsInSsa, 175 ConjunctsInUnsatCore, 25 InterpolantComputations, 19 PerfectInterpolantSequences, 1156/4426 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! [2022-02-23 16:08:02,033 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...