/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-invgen/SpamAssassin-loop.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-14 20:49:39,456 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-14 20:49:39,457 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-14 20:49:39,485 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-14 20:49:39,503 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-14 20:49:39,504 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-14 20:49:39,504 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-14 20:49:39,505 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-14 20:49:39,505 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-14 20:49:39,506 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-14 20:49:39,507 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-14 20:49:39,508 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-14 20:49:39,509 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-14 20:49:39,511 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-14 20:49:39,513 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-14 20:49:39,514 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-14 20:49:39,522 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-14 20:49:39,526 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-14 20:49:39,527 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-14 20:49:39,527 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-14 20:49:39,531 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-14 20:49:39,541 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-14 20:49:39,541 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-14 20:49:39,542 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-14 20:49:39,542 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-14 20:49:39,542 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-14 20:49:39,542 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-14 20:49:39,542 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-14 20:49:39,542 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-14 20:49:39,542 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-14 20:49:39,542 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-14 20:49:39,543 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-14 20:49:39,543 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-14 20:49:39,543 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-14 20:49:39,543 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-14 20:49:39,543 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-14 20:49:39,543 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-14 20:49:39,543 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-14 20:49:39,543 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-14 20:49:39,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 20:49:39,543 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-14 20:49:39,543 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-14 20:49:39,544 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-14 20:49:39,544 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-14 20:49:39,753 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-14 20:49:39,768 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-14 20:49:39,770 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-14 20:49:39,771 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-14 20:49:39,781 INFO L275 PluginConnector]: CDTParser initialized [2022-02-14 20:49:39,782 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i [2022-02-14 20:49:39,826 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9d590f30/32200a7f7b44449f8d0f7a24cf781e6c/FLAG552630255 [2022-02-14 20:49:40,189 INFO L306 CDTParser]: Found 1 translation units. [2022-02-14 20:49:40,189 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i [2022-02-14 20:49:40,194 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9d590f30/32200a7f7b44449f8d0f7a24cf781e6c/FLAG552630255 [2022-02-14 20:49:40,205 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9d590f30/32200a7f7b44449f8d0f7a24cf781e6c [2022-02-14 20:49:40,206 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-14 20:49:40,207 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-14 20:49:40,210 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-14 20:49:40,211 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-14 20:49:40,213 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-14 20:49:40,214 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 08:49:40" (1/1) ... [2022-02-14 20:49:40,215 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@471c4438 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:49:40, skipping insertion in model container [2022-02-14 20:49:40,215 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 08:49:40" (1/1) ... [2022-02-14 20:49:40,220 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-14 20:49:40,233 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-14 20:49:40,383 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-invgen/SpamAssassin-loop.i[893,906] [2022-02-14 20:49:40,403 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 20:49:40,408 INFO L203 MainTranslator]: Completed pre-run [2022-02-14 20:49:40,422 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-invgen/SpamAssassin-loop.i[893,906] [2022-02-14 20:49:40,436 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 20:49:40,444 INFO L208 MainTranslator]: Completed translation [2022-02-14 20:49:40,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:49:40 WrapperNode [2022-02-14 20:49:40,445 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-14 20:49:40,445 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-14 20:49:40,446 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-14 20:49:40,446 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-14 20:49:40,457 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:49:40" (1/1) ... [2022-02-14 20:49:40,457 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:49:40" (1/1) ... [2022-02-14 20:49:40,463 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:49:40" (1/1) ... [2022-02-14 20:49:40,463 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:49:40" (1/1) ... [2022-02-14 20:49:40,478 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:49:40" (1/1) ... [2022-02-14 20:49:40,481 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:49:40" (1/1) ... [2022-02-14 20:49:40,482 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:49:40" (1/1) ... [2022-02-14 20:49:40,483 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-14 20:49:40,484 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-14 20:49:40,484 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-14 20:49:40,484 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-14 20:49:40,496 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:49:40" (1/1) ... [2022-02-14 20:49:40,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 20:49:40,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 20:49:40,542 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) [2022-02-14 20:49:40,557 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 [2022-02-14 20:49:40,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-14 20:49:40,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-14 20:49:40,593 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-14 20:49:40,593 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-14 20:49:40,593 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-14 20:49:40,593 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-14 20:49:40,593 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-14 20:49:40,593 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-14 20:49:40,593 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-14 20:49:40,593 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-14 20:49:40,594 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-14 20:49:40,594 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-14 20:49:40,594 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-14 20:49:40,594 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-14 20:49:40,594 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-14 20:49:40,594 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-14 20:49:40,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-14 20:49:40,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-14 20:49:40,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-14 20:49:40,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-14 20:49:40,594 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-14 20:49:40,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-14 20:49:40,676 INFO L234 CfgBuilder]: Building ICFG [2022-02-14 20:49:40,678 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-14 20:49:40,830 INFO L275 CfgBuilder]: Performing block encoding [2022-02-14 20:49:40,835 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-14 20:49:40,835 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-14 20:49:40,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 08:49:40 BoogieIcfgContainer [2022-02-14 20:49:40,836 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-14 20:49:40,837 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-14 20:49:40,837 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-14 20:49:40,852 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-14 20:49:40,854 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 08:49:40" (1/1) ... [2022-02-14 20:49:40,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 08:49:40 BasicIcfg [2022-02-14 20:49:40,870 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-14 20:49:40,871 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-14 20:49:40,871 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-14 20:49:40,873 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-14 20:49:40,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 08:49:40" (1/4) ... [2022-02-14 20:49:40,873 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@583ed88a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 08:49:40, skipping insertion in model container [2022-02-14 20:49:40,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 08:49:40" (2/4) ... [2022-02-14 20:49:40,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@583ed88a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 08:49:40, skipping insertion in model container [2022-02-14 20:49:40,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 08:49:40" (3/4) ... [2022-02-14 20:49:40,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@583ed88a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 08:49:40, skipping insertion in model container [2022-02-14 20:49:40,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 08:49:40" (4/4) ... [2022-02-14 20:49:40,878 INFO L111 eAbstractionObserver]: Analyzing ICFG SpamAssassin-loop.iJordan [2022-02-14 20:49:40,885 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-14 20:49:40,885 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-14 20:49:40,929 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-14 20:49:40,936 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 [2022-02-14 20:49:40,936 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-14 20:49:40,947 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-14 20:49:40,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-14 20:49:40,963 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:49:40,964 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:49:40,964 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:49:40,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:49:40,968 INFO L85 PathProgramCache]: Analyzing trace with hash -868390563, now seen corresponding path program 1 times [2022-02-14 20:49:40,974 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:49:40,974 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998260665] [2022-02-14 20:49:40,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:49:40,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:49:41,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:41,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:49:41,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:41,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:49:41,186 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:49:41,186 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998260665] [2022-02-14 20:49:41,186 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998260665] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 20:49:41,186 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 20:49:41,186 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-14 20:49:41,187 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317824216] [2022-02-14 20:49:41,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 20:49:41,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-14 20:49:41,190 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:49:41,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-14 20:49:41,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-14 20:49:41,213 INFO L87 Difference]: Start difference. First operand has 43 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:49:41,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:49:41,455 INFO L93 Difference]: Finished difference Result 52 states and 74 transitions. [2022-02-14 20:49:41,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-14 20:49:41,457 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-02-14 20:49:41,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:49:41,485 INFO L225 Difference]: With dead ends: 52 [2022-02-14 20:49:41,486 INFO L226 Difference]: Without dead ends: 47 [2022-02-14 20:49:41,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-14 20:49:41,498 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 34 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 20:49:41,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 68 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 20:49:41,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-02-14 20:49:41,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2022-02-14 20:49:41,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 19 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-14 20:49:41,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 61 transitions. [2022-02-14 20:49:41,552 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 61 transitions. Word has length 14 [2022-02-14 20:49:41,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:49:41,552 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 61 transitions. [2022-02-14 20:49:41,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:49:41,553 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 61 transitions. [2022-02-14 20:49:41,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-14 20:49:41,554 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:49:41,554 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:49:41,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-14 20:49:41,555 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:49:41,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:49:41,558 INFO L85 PathProgramCache]: Analyzing trace with hash -867437251, now seen corresponding path program 1 times [2022-02-14 20:49:41,558 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:49:41,559 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920634744] [2022-02-14 20:49:41,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:49:41,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:49:41,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:41,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:49:41,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:41,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:49:41,657 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:49:41,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920634744] [2022-02-14 20:49:41,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920634744] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 20:49:41,658 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 20:49:41,658 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-14 20:49:41,658 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560622710] [2022-02-14 20:49:41,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 20:49:41,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-14 20:49:41,659 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:49:41,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-14 20:49:41,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-14 20:49:41,660 INFO L87 Difference]: Start difference. First operand 43 states and 61 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:49:41,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:49:41,883 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2022-02-14 20:49:41,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-14 20:49:41,884 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-02-14 20:49:41,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:49:41,887 INFO L225 Difference]: With dead ends: 53 [2022-02-14 20:49:41,888 INFO L226 Difference]: Without dead ends: 53 [2022-02-14 20:49:41,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-14 20:49:41,893 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 28 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 20:49:41,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 52 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 20:49:41,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-02-14 20:49:41,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2022-02-14 20:49:41,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-14 20:49:41,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 67 transitions. [2022-02-14 20:49:41,910 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 67 transitions. Word has length 14 [2022-02-14 20:49:41,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:49:41,912 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 67 transitions. [2022-02-14 20:49:41,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 20:49:41,915 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 67 transitions. [2022-02-14 20:49:41,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-14 20:49:41,915 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:49:41,916 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:49:41,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-14 20:49:41,916 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:49:41,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:49:41,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1607544442, now seen corresponding path program 1 times [2022-02-14 20:49:41,917 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:49:41,917 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879572538] [2022-02-14 20:49:41,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:49:41,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:49:41,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:41,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:49:41,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:41,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-02-14 20:49:41,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:41,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 20:49:41,980 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:49:41,980 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879572538] [2022-02-14 20:49:41,980 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879572538] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 20:49:41,980 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 20:49:41,980 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-14 20:49:41,980 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961210579] [2022-02-14 20:49:41,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 20:49:41,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-14 20:49:41,981 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:49:41,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-14 20:49:41,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-14 20:49:41,981 INFO L87 Difference]: Start difference. First operand 51 states and 67 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-14 20:49:42,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:49:42,128 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2022-02-14 20:49:42,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-14 20:49:42,129 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2022-02-14 20:49:42,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:49:42,131 INFO L225 Difference]: With dead ends: 55 [2022-02-14 20:49:42,131 INFO L226 Difference]: Without dead ends: 55 [2022-02-14 20:49:42,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-14 20:49:42,132 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 26 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 20:49:42,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 50 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 20:49:42,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-02-14 20:49:42,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-02-14 20:49:42,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 19 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-14 20:49:42,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 70 transitions. [2022-02-14 20:49:42,137 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 70 transitions. Word has length 19 [2022-02-14 20:49:42,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:49:42,137 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 70 transitions. [2022-02-14 20:49:42,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-14 20:49:42,137 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 70 transitions. [2022-02-14 20:49:42,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-14 20:49:42,138 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:49:42,138 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:49:42,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-14 20:49:42,138 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:49:42,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:49:42,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1153064602, now seen corresponding path program 1 times [2022-02-14 20:49:42,139 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:49:42,139 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858304920] [2022-02-14 20:49:42,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:49:42,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:49:42,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:42,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:49:42,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:42,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-02-14 20:49:42,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:42,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-14 20:49:42,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:42,206 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 20:49:42,206 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:49:42,206 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858304920] [2022-02-14 20:49:42,206 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858304920] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 20:49:42,207 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 20:49:42,207 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-14 20:49:42,207 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088165906] [2022-02-14 20:49:42,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 20:49:42,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-14 20:49:42,207 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:49:42,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-14 20:49:42,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-14 20:49:42,208 INFO L87 Difference]: Start difference. First operand 55 states and 70 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-14 20:49:42,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:49:42,377 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2022-02-14 20:49:42,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-14 20:49:42,378 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-02-14 20:49:42,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:49:42,379 INFO L225 Difference]: With dead ends: 59 [2022-02-14 20:49:42,379 INFO L226 Difference]: Without dead ends: 59 [2022-02-14 20:49:42,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-02-14 20:49:42,380 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 34 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 20:49:42,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 59 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 20:49:42,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-02-14 20:49:42,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-02-14 20:49:42,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-14 20:49:42,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2022-02-14 20:49:42,385 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 24 [2022-02-14 20:49:42,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:49:42,386 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2022-02-14 20:49:42,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-14 20:49:42,386 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2022-02-14 20:49:42,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-14 20:49:42,387 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:49:42,387 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:49:42,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-14 20:49:42,387 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:49:42,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:49:42,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1359459551, now seen corresponding path program 1 times [2022-02-14 20:49:42,388 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:49:42,388 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377345395] [2022-02-14 20:49:42,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:49:42,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:49:42,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:42,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:49:42,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:42,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-02-14 20:49:42,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:42,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-14 20:49:42,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:42,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-02-14 20:49:42,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:42,444 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-14 20:49:42,451 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:49:42,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377345395] [2022-02-14 20:49:42,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377345395] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 20:49:42,451 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 20:49:42,452 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-14 20:49:42,452 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060606568] [2022-02-14 20:49:42,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 20:49:42,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-14 20:49:42,452 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:49:42,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-14 20:49:42,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-14 20:49:42,453 INFO L87 Difference]: Start difference. First operand 59 states and 73 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-14 20:49:42,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:49:42,583 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2022-02-14 20:49:42,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-14 20:49:42,583 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-02-14 20:49:42,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:49:42,586 INFO L225 Difference]: With dead ends: 64 [2022-02-14 20:49:42,586 INFO L226 Difference]: Without dead ends: 64 [2022-02-14 20:49:42,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-14 20:49:42,588 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 24 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 20:49:42,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 53 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 20:49:42,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-02-14 20:49:42,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-02-14 20:49:42,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 36 states have internal predecessors, (39), 19 states have call successors, (19), 9 states have call predecessors, (19), 8 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-14 20:49:42,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2022-02-14 20:49:42,606 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 29 [2022-02-14 20:49:42,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:49:42,606 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2022-02-14 20:49:42,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-14 20:49:42,606 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2022-02-14 20:49:42,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-14 20:49:42,607 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:49:42,607 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:49:42,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-14 20:49:42,608 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:49:42,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:49:42,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1056918318, now seen corresponding path program 1 times [2022-02-14 20:49:42,608 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:49:42,608 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932600780] [2022-02-14 20:49:42,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:49:42,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:49:42,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:42,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:49:42,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:42,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-02-14 20:49:42,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:42,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-14 20:49:42,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:42,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-02-14 20:49:42,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:42,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-14 20:49:42,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:42,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-14 20:49:42,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:42,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-14 20:49:42,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:42,735 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-02-14 20:49:42,736 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:49:42,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932600780] [2022-02-14 20:49:42,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932600780] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 20:49:42,736 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 20:49:42,736 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-14 20:49:42,736 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005928957] [2022-02-14 20:49:42,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 20:49:42,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-14 20:49:42,737 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:49:42,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-14 20:49:42,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-02-14 20:49:42,737 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-14 20:49:42,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:49:42,898 INFO L93 Difference]: Finished difference Result 73 states and 89 transitions. [2022-02-14 20:49:42,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-14 20:49:42,899 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-02-14 20:49:42,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:49:42,900 INFO L225 Difference]: With dead ends: 73 [2022-02-14 20:49:42,900 INFO L226 Difference]: Without dead ends: 73 [2022-02-14 20:49:42,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-02-14 20:49:42,902 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 34 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 20:49:42,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 57 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 20:49:42,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-02-14 20:49:42,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 67. [2022-02-14 20:49:42,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 38 states have (on average 1.105263157894737) internal successors, (42), 39 states have internal predecessors, (42), 19 states have call successors, (19), 10 states have call predecessors, (19), 9 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-14 20:49:42,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2022-02-14 20:49:42,910 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 47 [2022-02-14 20:49:42,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:49:42,911 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2022-02-14 20:49:42,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-14 20:49:42,911 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2022-02-14 20:49:42,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-02-14 20:49:42,912 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:49:42,912 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:49:42,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-14 20:49:42,912 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:49:42,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:49:42,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1366093938, now seen corresponding path program 1 times [2022-02-14 20:49:42,913 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:49:42,913 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725155015] [2022-02-14 20:49:42,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:49:42,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:49:42,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:42,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:49:42,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:42,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-02-14 20:49:42,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:42,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-14 20:49:42,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:42,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-02-14 20:49:42,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:42,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-14 20:49:42,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:42,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-14 20:49:43,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:43,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-14 20:49:43,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:43,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-14 20:49:43,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:43,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-14 20:49:43,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:43,033 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-02-14 20:49:43,033 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:49:43,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725155015] [2022-02-14 20:49:43,033 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725155015] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 20:49:43,034 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 20:49:43,034 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-14 20:49:43,034 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549232017] [2022-02-14 20:49:43,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 20:49:43,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-14 20:49:43,034 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:49:43,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-14 20:49:43,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-02-14 20:49:43,035 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-02-14 20:49:43,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:49:43,198 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2022-02-14 20:49:43,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-14 20:49:43,199 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 57 [2022-02-14 20:49:43,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:49:43,200 INFO L225 Difference]: With dead ends: 73 [2022-02-14 20:49:43,200 INFO L226 Difference]: Without dead ends: 73 [2022-02-14 20:49:43,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-02-14 20:49:43,201 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 34 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 20:49:43,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 64 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 20:49:43,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-02-14 20:49:43,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2022-02-14 20:49:43,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 42 states have internal predecessors, (45), 19 states have call successors, (19), 11 states have call predecessors, (19), 10 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-14 20:49:43,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 82 transitions. [2022-02-14 20:49:43,205 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 82 transitions. Word has length 57 [2022-02-14 20:49:43,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:49:43,205 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 82 transitions. [2022-02-14 20:49:43,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-02-14 20:49:43,205 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 82 transitions. [2022-02-14 20:49:43,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-14 20:49:43,206 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 20:49:43,206 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:49:43,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-14 20:49:43,207 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 20:49:43,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 20:49:43,207 INFO L85 PathProgramCache]: Analyzing trace with hash -430516171, now seen corresponding path program 1 times [2022-02-14 20:49:43,207 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 20:49:43,207 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870493247] [2022-02-14 20:49:43,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 20:49:43,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 20:49:43,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:43,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 20:49:43,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:43,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-02-14 20:49:43,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:43,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-14 20:49:43,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:43,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-02-14 20:49:43,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:43,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-14 20:49:43,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:43,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-02-14 20:49:43,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:43,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-02-14 20:49:43,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:43,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-02-14 20:49:43,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:43,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-02-14 20:49:43,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:43,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-02-14 20:49:43,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:43,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-02-14 20:49:43,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 20:49:43,304 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-02-14 20:49:43,304 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 20:49:43,304 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870493247] [2022-02-14 20:49:43,305 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870493247] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 20:49:43,305 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 20:49:43,305 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-14 20:49:43,305 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510194134] [2022-02-14 20:49:43,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 20:49:43,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-14 20:49:43,305 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 20:49:43,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-14 20:49:43,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-02-14 20:49:43,306 INFO L87 Difference]: Start difference. First operand 71 states and 82 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-02-14 20:49:43,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 20:49:43,468 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2022-02-14 20:49:43,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-14 20:49:43,470 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 68 [2022-02-14 20:49:43,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 20:49:43,471 INFO L225 Difference]: With dead ends: 71 [2022-02-14 20:49:43,471 INFO L226 Difference]: Without dead ends: 0 [2022-02-14 20:49:43,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-02-14 20:49:43,471 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 36 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 20:49:43,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 56 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 20:49:43,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-14 20:49:43,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-14 20:49:43,472 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) [2022-02-14 20:49:43,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-14 20:49:43,472 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 68 [2022-02-14 20:49:43,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 20:49:43,472 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-14 20:49:43,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-02-14 20:49:43,473 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-14 20:49:43,473 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-14 20:49:43,474 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-14 20:49:43,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-14 20:49:43,477 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 20:49:43,478 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-14 20:49:43,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 08:49:43 BasicIcfg [2022-02-14 20:49:43,480 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-14 20:49:43,480 INFO L158 Benchmark]: Toolchain (without parser) took 3273.18ms. Allocated memory was 240.1MB in the beginning and 293.6MB in the end (delta: 53.5MB). Free memory was 188.4MB in the beginning and 206.8MB in the end (delta: -18.3MB). Peak memory consumption was 35.2MB. Max. memory is 8.0GB. [2022-02-14 20:49:43,481 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 240.1MB. Free memory is still 204.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-14 20:49:43,481 INFO L158 Benchmark]: CACSL2BoogieTranslator took 234.53ms. Allocated memory is still 240.1MB. Free memory was 188.2MB in the beginning and 213.5MB in the end (delta: -25.3MB). Peak memory consumption was 7.0MB. Max. memory is 8.0GB. [2022-02-14 20:49:43,481 INFO L158 Benchmark]: Boogie Preprocessor took 37.82ms. Allocated memory is still 240.1MB. Free memory was 213.5MB in the beginning and 212.1MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-14 20:49:43,481 INFO L158 Benchmark]: RCFGBuilder took 352.46ms. Allocated memory is still 240.1MB. Free memory was 212.1MB in the beginning and 199.5MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-02-14 20:49:43,481 INFO L158 Benchmark]: IcfgTransformer took 33.08ms. Allocated memory is still 240.1MB. Free memory was 199.5MB in the beginning and 198.1MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-14 20:49:43,481 INFO L158 Benchmark]: TraceAbstraction took 2609.24ms. Allocated memory was 240.1MB in the beginning and 293.6MB in the end (delta: 53.5MB). Free memory was 197.8MB in the beginning and 206.8MB in the end (delta: -9.0MB). Peak memory consumption was 46.0MB. Max. memory is 8.0GB. [2022-02-14 20:49:43,482 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 240.1MB. Free memory is still 204.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 234.53ms. Allocated memory is still 240.1MB. Free memory was 188.2MB in the beginning and 213.5MB in the end (delta: -25.3MB). Peak memory consumption was 7.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 37.82ms. Allocated memory is still 240.1MB. Free memory was 213.5MB in the beginning and 212.1MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 352.46ms. Allocated memory is still 240.1MB. Free memory was 212.1MB in the beginning and 199.5MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * IcfgTransformer took 33.08ms. Allocated memory is still 240.1MB. Free memory was 199.5MB in the beginning and 198.1MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 2609.24ms. Allocated memory was 240.1MB in the beginning and 293.6MB in the end (delta: 53.5MB). Free memory was 197.8MB in the beginning and 206.8MB in the end (delta: -9.0MB). Peak memory consumption was 46.0MB. 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: 19]: 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 4 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.6s, OverallIterations: 8, TraceHistogramMax: 11, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 268 SdHoareTripleChecker+Valid, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 250 mSDsluCounter, 459 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 165 mSDsCounter, 489 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1489 IncrementalHoareTripleChecker+Invalid, 1978 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 489 mSolverCounterUnsat, 294 mSDtfsCounter, 1489 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 169 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=71occurred in iteration=7, InterpolantAutomatonStates: 63, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 15 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 272 NumberOfCodeBlocks, 272 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 264 ConstructedInterpolants, 0 QuantifiedInterpolants, 592 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 428/428 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! [2022-02-14 20:49:43,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...