/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/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 05:59:48,977 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 05:59:48,978 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 05:59:49,004 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-05 05:59:49,014 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 05:59:49,020 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 05:59:49,020 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 05:59:49,022 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 05:59:49,023 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 05:59:49,025 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 05:59:49,025 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 05:59:49,026 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 05:59:49,027 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 05:59:49,029 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 05:59:49,030 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 05:59:49,031 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 05:59:49,031 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 05:59:49,033 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-05 05:59:49,042 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 05:59:49,043 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 05:59:49,045 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 05:59:49,045 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-05 05:59:49,069 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 05:59:49,069 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 05:59:49,070 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-05 05:59:49,070 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-05 05:59:49,071 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-05 05:59:49,071 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-05 05:59:49,071 INFO L138 SettingsManager]: * Use SBE=true [2022-04-05 05:59:49,071 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 05:59:49,072 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 05:59:49,072 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 05:59:49,072 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 05:59:49,072 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 05:59:49,072 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 05:59:49,073 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 05:59:49,073 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 05:59:49,073 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 05:59:49,073 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 05:59:49,073 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 05:59:49,073 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 05:59:49,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 05:59:49,073 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 05:59:49,073 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-05 05:59:49,073 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-05 05:59:49,073 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 05:59:49,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-05 05:59:49,074 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-05 05:59:49,074 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-05 05:59:49,074 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-05 05:59:49,076 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 05:59:49,076 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 05:59:49,252 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 05:59:49,275 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 05:59:49,277 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 05:59:49,277 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 05:59:49,279 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 05:59:49,280 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_3.c [2022-04-05 05:59:49,318 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aca848c5f/d670c4565f9a4919b964733a1b6e06dd/FLAG067e69fa2 [2022-04-05 05:59:49,618 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 05:59:49,618 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_3.c [2022-04-05 05:59:49,622 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aca848c5f/d670c4565f9a4919b964733a1b6e06dd/FLAG067e69fa2 [2022-04-05 05:59:50,062 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aca848c5f/d670c4565f9a4919b964733a1b6e06dd [2022-04-05 05:59:50,063 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 05:59:50,064 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 05:59:50,065 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 05:59:50,065 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 05:59:50,067 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 05:59:50,068 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 05:59:50" (1/1) ... [2022-04-05 05:59:50,069 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f2d7ad4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:59:50, skipping insertion in model container [2022-04-05 05:59:50,069 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 05:59:50" (1/1) ... [2022-04-05 05:59:50,085 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 05:59:50,092 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 05:59:50,190 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_3.c[318,331] [2022-04-05 05:59:50,217 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 05:59:50,224 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 05:59:50,231 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_3.c[318,331] [2022-04-05 05:59:50,233 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 05:59:50,241 INFO L208 MainTranslator]: Completed translation [2022-04-05 05:59:50,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:59:50 WrapperNode [2022-04-05 05:59:50,241 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 05:59:50,242 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 05:59:50,242 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 05:59:50,242 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 05:59:50,249 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:59:50" (1/1) ... [2022-04-05 05:59:50,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:59:50" (1/1) ... [2022-04-05 05:59:50,252 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:59:50" (1/1) ... [2022-04-05 05:59:50,253 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:59:50" (1/1) ... [2022-04-05 05:59:50,255 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:59:50" (1/1) ... [2022-04-05 05:59:50,258 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:59:50" (1/1) ... [2022-04-05 05:59:50,258 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:59:50" (1/1) ... [2022-04-05 05:59:50,259 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 05:59:50,260 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 05:59:50,260 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 05:59:50,260 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 05:59:50,261 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:59:50" (1/1) ... [2022-04-05 05:59:50,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 05:59:50,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:59:50,280 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) [2022-04-05 05:59:50,281 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 [2022-04-05 05:59:50,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 05:59:50,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 05:59:50,315 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 05:59:50,315 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 05:59:50,315 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 05:59:50,315 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 05:59:50,315 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 05:59:50,316 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 05:59:50,316 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 05:59:50,317 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 05:59:50,317 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 05:59:50,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 05:59:50,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 05:59:50,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 05:59:50,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 05:59:50,317 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 05:59:50,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 05:59:50,365 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 05:59:50,366 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 05:59:50,471 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 05:59:50,475 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 05:59:50,475 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-05 05:59:50,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 05:59:50 BoogieIcfgContainer [2022-04-05 05:59:50,476 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 05:59:50,477 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 05:59:50,477 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 05:59:50,487 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 05:59:50,490 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 05:59:50" (1/1) ... [2022-04-05 05:59:50,491 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-05 05:59:50,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 05:59:50 BasicIcfg [2022-04-05 05:59:50,500 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 05:59:50,502 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 05:59:50,502 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 05:59:50,504 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 05:59:50,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 05:59:50" (1/4) ... [2022-04-05 05:59:50,504 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1efc0edc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 05:59:50, skipping insertion in model container [2022-04-05 05:59:50,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:59:50" (2/4) ... [2022-04-05 05:59:50,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1efc0edc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 05:59:50, skipping insertion in model container [2022-04-05 05:59:50,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 05:59:50" (3/4) ... [2022-04-05 05:59:50,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1efc0edc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 05:59:50, skipping insertion in model container [2022-04-05 05:59:50,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 05:59:50" (4/4) ... [2022-04-05 05:59:50,506 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_3.cqvasr [2022-04-05 05:59:50,509 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-05 05:59:50,509 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 05:59:50,538 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 05:59:50,543 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 [2022-04-05 05:59:50,543 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 05:59:50,570 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 05:59:50,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-05 05:59:50,573 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:59:50,573 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:59:50,574 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:59:50,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:59:50,579 INFO L85 PathProgramCache]: Analyzing trace with hash 164364990, now seen corresponding path program 1 times [2022-04-05 05:59:50,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:59:50,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024329040] [2022-04-05 05:59:50,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:59:50,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:59:50,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:59:50,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:59:50,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:59:50,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:59:50,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:59:50,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024329040] [2022-04-05 05:59:50,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024329040] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 05:59:50,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 05:59:50,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 05:59:50,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719973203] [2022-04-05 05:59:50,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 05:59:50,748 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 05:59:50,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:59:50,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 05:59:50,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 05:59:50,777 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2022-04-05 05:59:50,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:59:50,828 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2022-04-05 05:59:50,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 05:59:50,831 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 12 [2022-04-05 05:59:50,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:59:50,835 INFO L225 Difference]: With dead ends: 34 [2022-04-05 05:59:50,835 INFO L226 Difference]: Without dead ends: 14 [2022-04-05 05:59:50,837 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 05:59:50,840 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 14 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 05:59:50,840 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 25 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 05:59:50,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-04-05 05:59:50,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-04-05 05:59:50,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:59:50,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-04-05 05:59:50,876 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 12 [2022-04-05 05:59:50,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:59:50,877 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-04-05 05:59:50,878 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2022-04-05 05:59:50,878 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-04-05 05:59:50,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-05 05:59:50,878 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:59:50,879 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:59:50,879 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 05:59:50,879 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:59:50,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:59:50,881 INFO L85 PathProgramCache]: Analyzing trace with hash 165288511, now seen corresponding path program 1 times [2022-04-05 05:59:50,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:59:50,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491202679] [2022-04-05 05:59:50,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:59:50,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:59:50,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:59:50,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:59:50,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:59:50,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:59:50,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:59:50,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491202679] [2022-04-05 05:59:50,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491202679] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 05:59:50,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 05:59:50,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 05:59:50,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485358189] [2022-04-05 05:59:50,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 05:59:50,985 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 05:59:50,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:59:50,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 05:59:50,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 05:59:50,986 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-04-05 05:59:51,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:59:51,016 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2022-04-05 05:59:51,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 05:59:51,017 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 12 [2022-04-05 05:59:51,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:59:51,018 INFO L225 Difference]: With dead ends: 24 [2022-04-05 05:59:51,018 INFO L226 Difference]: Without dead ends: 16 [2022-04-05 05:59:51,021 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-05 05:59:51,023 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 05:59:51,024 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 21 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 05:59:51,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-04-05 05:59:51,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-04-05 05:59:51,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:59:51,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-04-05 05:59:51,038 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2022-04-05 05:59:51,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:59:51,039 INFO L478 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-04-05 05:59:51,039 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-04-05 05:59:51,039 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-04-05 05:59:51,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-04-05 05:59:51,039 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:59:51,039 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:59:51,039 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-05 05:59:51,040 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:59:51,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:59:51,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1054746269, now seen corresponding path program 1 times [2022-04-05 05:59:51,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:59:51,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410744348] [2022-04-05 05:59:51,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:59:51,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:59:51,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:59:51,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:59:51,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:59:51,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 05:59:51,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:59:51,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410744348] [2022-04-05 05:59:51,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410744348] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 05:59:51,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 05:59:51,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 05:59:51,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101290711] [2022-04-05 05:59:51,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 05:59:51,102 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 05:59:51,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:59:51,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 05:59:51,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 05:59:51,102 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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) [2022-04-05 05:59:51,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:59:51,127 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2022-04-05 05:59:51,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 05:59:51,127 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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 [2022-04-05 05:59:51,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:59:51,128 INFO L225 Difference]: With dead ends: 22 [2022-04-05 05:59:51,128 INFO L226 Difference]: Without dead ends: 17 [2022-04-05 05:59:51,128 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-05 05:59:51,129 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 9 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 05:59:51,129 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 21 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 05:59:51,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-04-05 05:59:51,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-04-05 05:59:51,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:59:51,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-04-05 05:59:51,134 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2022-04-05 05:59:51,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:59:51,134 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-04-05 05:59:51,134 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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) [2022-04-05 05:59:51,134 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-04-05 05:59:51,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-04-05 05:59:51,135 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:59:51,135 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:59:51,135 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-05 05:59:51,135 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:59:51,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:59:51,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1687477607, now seen corresponding path program 1 times [2022-04-05 05:59:51,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:59:51,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763177621] [2022-04-05 05:59:51,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:59:51,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:59:51,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:59:51,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:59:51,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:59:51,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 05:59:51,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:59:51,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763177621] [2022-04-05 05:59:51,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763177621] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:59:51,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401368975] [2022-04-05 05:59:51,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:59:51,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:59:51,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:59:51,175 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:59:51,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-05 05:59:51,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:59:51,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2022-04-05 05:59:51,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:59:51,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 05:59:51,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:59:51,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 05:59:51,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401368975] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:59:51,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:59:51,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-04-05 05:59:51,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343046358] [2022-04-05 05:59:51,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:59:51,315 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-05 05:59:51,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:59:51,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-05 05:59:51,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-04-05 05:59:51,316 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:59:51,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:59:51,394 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2022-04-05 05:59:51,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-05 05:59:51,395 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-04-05 05:59:51,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:59:51,397 INFO L225 Difference]: With dead ends: 31 [2022-04-05 05:59:51,397 INFO L226 Difference]: Without dead ends: 22 [2022-04-05 05:59:51,401 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-04-05 05:59:51,407 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 18 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 05:59:51,408 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 30 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 05:59:51,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-04-05 05:59:51,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-04-05 05:59:51,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:59:51,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-04-05 05:59:51,417 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 15 [2022-04-05 05:59:51,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:59:51,417 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-04-05 05:59:51,417 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:59:51,417 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-04-05 05:59:51,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-05 05:59:51,418 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:59:51,418 INFO L499 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:59:51,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-05 05:59:51,634 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:59:51,634 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:59:51,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:59:51,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1507884679, now seen corresponding path program 1 times [2022-04-05 05:59:51,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:59:51,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069536470] [2022-04-05 05:59:51,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:59:51,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:59:51,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:59:51,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:59:51,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:59:51,685 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 05:59:51,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:59:51,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069536470] [2022-04-05 05:59:51,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069536470] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:59:51,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027421098] [2022-04-05 05:59:51,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:59:51,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:59:51,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:59:51,689 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:59:51,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-05 05:59:51,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:59:51,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-05 05:59:51,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:59:51,766 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 05:59:51,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:59:51,816 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 05:59:51,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027421098] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:59:51,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:59:51,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-04-05 05:59:51,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090079258] [2022-04-05 05:59:51,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:59:51,817 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-05 05:59:51,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:59:51,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-05 05:59:51,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-05 05:59:51,817 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:59:51,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:59:51,888 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2022-04-05 05:59:51,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-05 05:59:51,889 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-04-05 05:59:51,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:59:51,889 INFO L225 Difference]: With dead ends: 42 [2022-04-05 05:59:51,889 INFO L226 Difference]: Without dead ends: 30 [2022-04-05 05:59:51,890 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-04-05 05:59:51,890 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 16 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 05:59:51,890 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 36 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 05:59:51,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-04-05 05:59:51,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-04-05 05:59:51,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:59:51,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-04-05 05:59:51,894 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 21 [2022-04-05 05:59:51,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:59:51,894 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-04-05 05:59:51,894 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:59:51,894 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-04-05 05:59:51,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-05 05:59:51,895 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:59:51,895 INFO L499 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:59:51,911 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-04-05 05:59:52,111 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:59:52,111 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:59:52,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:59:52,112 INFO L85 PathProgramCache]: Analyzing trace with hash 163921129, now seen corresponding path program 2 times [2022-04-05 05:59:52,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:59:52,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024832586] [2022-04-05 05:59:52,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:59:52,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:59:52,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:59:52,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:59:52,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:59:52,190 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 05:59:52,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:59:52,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024832586] [2022-04-05 05:59:52,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024832586] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:59:52,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909829210] [2022-04-05 05:59:52,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 05:59:52,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:59:52,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:59:52,192 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:59:52,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-05 05:59:52,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 05:59:52,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:59:52,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-05 05:59:52,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:59:52,267 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 05:59:52,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:59:52,386 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 05:59:52,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909829210] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:59:52,387 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:59:52,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-04-05 05:59:52,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436013603] [2022-04-05 05:59:52,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:59:52,387 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-05 05:59:52,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:59:52,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-05 05:59:52,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-04-05 05:59:52,388 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:59:52,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:59:52,552 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2022-04-05 05:59:52,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-05 05:59:52,553 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-04-05 05:59:52,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:59:52,553 INFO L225 Difference]: With dead ends: 58 [2022-04-05 05:59:52,553 INFO L226 Difference]: Without dead ends: 46 [2022-04-05 05:59:52,554 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=377, Invalid=615, Unknown=0, NotChecked=0, Total=992 [2022-04-05 05:59:52,554 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 24 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 05:59:52,554 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 31 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 05:59:52,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-04-05 05:59:52,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-04-05 05:59:52,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:59:52,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2022-04-05 05:59:52,559 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 29 [2022-04-05 05:59:52,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:59:52,559 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2022-04-05 05:59:52,560 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:59:52,560 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2022-04-05 05:59:52,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-05 05:59:52,560 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:59:52,560 INFO L499 BasicCegarLoop]: trace histogram [16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:59:52,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-05 05:59:52,775 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:59:52,776 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:59:52,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:59:52,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1399757879, now seen corresponding path program 3 times [2022-04-05 05:59:52,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:59:52,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474432134] [2022-04-05 05:59:52,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:59:52,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:59:52,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:59:52,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:59:52,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:59:52,928 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 05:59:52,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:59:52,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474432134] [2022-04-05 05:59:52,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474432134] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:59:52,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319851108] [2022-04-05 05:59:52,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 05:59:52,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:59:52,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:59:52,929 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:59:52,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-05 05:59:52,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-04-05 05:59:52,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:59:52,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-05 05:59:52,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:59:53,056 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 46 proven. 1 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-05 05:59:53,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:59:53,136 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 46 proven. 1 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-05 05:59:53,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319851108] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:59:53,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:59:53,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 5, 5] total 24 [2022-04-05 05:59:53,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686816854] [2022-04-05 05:59:53,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:59:53,137 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-05 05:59:53,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:59:53,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-05 05:59:53,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2022-04-05 05:59:53,138 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:59:53,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:59:53,444 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2022-04-05 05:59:53,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-05 05:59:53,444 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-04-05 05:59:53,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:59:53,445 INFO L225 Difference]: With dead ends: 69 [2022-04-05 05:59:53,445 INFO L226 Difference]: Without dead ends: 57 [2022-04-05 05:59:53,445 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=584, Invalid=1308, Unknown=0, NotChecked=0, Total=1892 [2022-04-05 05:59:53,446 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 47 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 05:59:53,446 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 38 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 05:59:53,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-04-05 05:59:53,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2022-04-05 05:59:53,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:59:53,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2022-04-05 05:59:53,450 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 45 [2022-04-05 05:59:53,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:59:53,451 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2022-04-05 05:59:53,451 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:59:53,451 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2022-04-05 05:59:53,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-05 05:59:53,452 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:59:53,452 INFO L499 BasicCegarLoop]: trace histogram [17, 15, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:59:53,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-05 05:59:53,666 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:59:53,666 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:59:53,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:59:53,666 INFO L85 PathProgramCache]: Analyzing trace with hash -2054357531, now seen corresponding path program 4 times [2022-04-05 05:59:53,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:59:53,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483642893] [2022-04-05 05:59:53,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:59:53,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:59:53,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:59:53,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:59:53,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:59:53,823 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-05 05:59:53,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:59:53,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483642893] [2022-04-05 05:59:53,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483642893] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:59:53,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77632067] [2022-04-05 05:59:53,824 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 05:59:53,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:59:53,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:59:53,825 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:59:53,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-05 05:59:53,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 05:59:53,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:59:53,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-05 05:59:53,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:59:53,949 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-05 05:59:53,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:59:54,293 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-05 05:59:54,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77632067] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:59:54,293 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:59:54,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-04-05 05:59:54,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225628681] [2022-04-05 05:59:54,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:59:54,294 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-05 05:59:54,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:59:54,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-05 05:59:54,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-04-05 05:59:54,296 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:59:54,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:59:54,819 INFO L93 Difference]: Finished difference Result 100 states and 123 transitions. [2022-04-05 05:59:54,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-05 05:59:54,819 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-04-05 05:59:54,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:59:54,820 INFO L225 Difference]: With dead ends: 100 [2022-04-05 05:59:54,820 INFO L226 Difference]: Without dead ends: 85 [2022-04-05 05:59:54,821 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1718, Invalid=2838, Unknown=0, NotChecked=0, Total=4556 [2022-04-05 05:59:54,822 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 42 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 05:59:54,822 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 26 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 05:59:54,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-04-05 05:59:54,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-04-05 05:59:54,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.05) internal successors, (84), 80 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:59:54,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2022-04-05 05:59:54,828 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 50 [2022-04-05 05:59:54,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:59:54,828 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2022-04-05 05:59:54,829 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:59:54,829 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2022-04-05 05:59:54,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-04-05 05:59:54,829 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:59:54,829 INFO L499 BasicCegarLoop]: trace histogram [34, 32, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:59:54,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-05 05:59:55,045 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:59:55,046 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:59:55,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:59:55,046 INFO L85 PathProgramCache]: Analyzing trace with hash -65127351, now seen corresponding path program 5 times [2022-04-05 05:59:55,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:59:55,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591762412] [2022-04-05 05:59:55,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:59:55,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:59:55,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:59:55,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:59:55,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:59:55,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1166 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-05 05:59:55,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:59:55,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591762412] [2022-04-05 05:59:55,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591762412] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:59:55,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464021809] [2022-04-05 05:59:55,481 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 05:59:55,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:59:55,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:59:55,481 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:59:55,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-05 05:59:55,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2022-04-05 05:59:55,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:59:55,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-05 05:59:55,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:59:55,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1166 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-05 05:59:55,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:59:56,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1166 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-05 05:59:56,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464021809] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:59:56,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:59:56,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2022-04-05 05:59:56,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285389392] [2022-04-05 05:59:56,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:59:56,778 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-04-05 05:59:56,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:59:56,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-04-05 05:59:56,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-04-05 05:59:56,780 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:59:58,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:59:58,383 INFO L93 Difference]: Finished difference Result 168 states and 208 transitions. [2022-04-05 05:59:58,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-04-05 05:59:58,383 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2022-04-05 05:59:58,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:59:58,384 INFO L225 Difference]: With dead ends: 168 [2022-04-05 05:59:58,384 INFO L226 Difference]: Without dead ends: 153 [2022-04-05 05:59:58,387 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2865 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6903, Invalid=11457, Unknown=0, NotChecked=0, Total=18360 [2022-04-05 05:59:58,388 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 76 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 05:59:58,388 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 51 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 05:59:58,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-04-05 05:59:58,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2022-04-05 05:59:58,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.027027027027027) internal successors, (152), 148 states have internal predecessors, (152), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:59:58,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 156 transitions. [2022-04-05 05:59:58,399 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 156 transitions. Word has length 84 [2022-04-05 05:59:58,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:59:58,399 INFO L478 AbstractCegarLoop]: Abstraction has 153 states and 156 transitions. [2022-04-05 05:59:58,399 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 69 states have internal predecessors, (148), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:59:58,400 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 156 transitions. [2022-04-05 05:59:58,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-04-05 05:59:58,401 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:59:58,401 INFO L499 BasicCegarLoop]: trace histogram [68, 66, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:59:58,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-05 05:59:58,615 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:59:58,616 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:59:58,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:59:58,616 INFO L85 PathProgramCache]: Analyzing trace with hash -63361519, now seen corresponding path program 6 times [2022-04-05 05:59:58,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:59:58,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384911133] [2022-04-05 05:59:58,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:59:58,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:59:58,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:59:59,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:59:59,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:59:59,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4634 backedges. 201 proven. 4422 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-05 05:59:59,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:59:59,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384911133] [2022-04-05 05:59:59,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384911133] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:59:59,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088318736] [2022-04-05 05:59:59,961 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 05:59:59,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:59:59,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:59:59,962 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:59:59,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-05 05:59:59,996 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-05 05:59:59,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:59:59,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-05 05:59:59,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:00:00,366 INFO L134 CoverageAnalysis]: Checked inductivity of 4634 backedges. 202 proven. 10 refuted. 0 times theorem prover too weak. 4422 trivial. 0 not checked. [2022-04-05 06:00:00,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:00:00,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4634 backedges. 202 proven. 10 refuted. 0 times theorem prover too weak. 4422 trivial. 0 not checked. [2022-04-05 06:00:00,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088318736] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:00:00,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:00:00,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 8, 8] total 82 [2022-04-05 06:00:00,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864195955] [2022-04-05 06:00:00,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:00:00,725 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-04-05 06:00:00,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:00:00,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-04-05 06:00:00,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2438, Invalid=4204, Unknown=0, NotChecked=0, Total=6642 [2022-04-05 06:00:00,727 INFO L87 Difference]: Start difference. First operand 153 states and 156 transitions. Second operand has 82 states, 82 states have (on average 2.073170731707317) internal successors, (170), 81 states have internal predecessors, (170), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 06:00:03,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:00:03,105 INFO L93 Difference]: Finished difference Result 182 states and 198 transitions. [2022-04-05 06:00:03,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-04-05 06:00:03,105 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.073170731707317) internal successors, (170), 81 states have internal predecessors, (170), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 152 [2022-04-05 06:00:03,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:00:03,106 INFO L225 Difference]: With dead ends: 182 [2022-04-05 06:00:03,106 INFO L226 Difference]: Without dead ends: 167 [2022-04-05 06:00:03,110 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4003 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=8562, Invalid=16878, Unknown=0, NotChecked=0, Total=25440 [2022-04-05 06:00:03,110 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 151 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 06:00:03,111 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 68 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 06:00:03,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-04-05 06:00:03,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 161. [2022-04-05 06:00:03,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 156 states have (on average 1.0256410256410255) internal successors, (160), 156 states have internal predecessors, (160), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 06:00:03,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 164 transitions. [2022-04-05 06:00:03,121 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 164 transitions. Word has length 152 [2022-04-05 06:00:03,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:00:03,121 INFO L478 AbstractCegarLoop]: Abstraction has 161 states and 164 transitions. [2022-04-05 06:00:03,121 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.073170731707317) internal successors, (170), 81 states have internal predecessors, (170), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 06:00:03,121 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 164 transitions. [2022-04-05 06:00:03,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-04-05 06:00:03,123 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:00:03,123 INFO L499 BasicCegarLoop]: trace histogram [69, 67, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:00:03,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-05 06:00:03,340 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:00:03,341 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:00:03,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:00:03,341 INFO L85 PathProgramCache]: Analyzing trace with hash -769977547, now seen corresponding path program 7 times [2022-04-05 06:00:03,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:00:03,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199859852] [2022-04-05 06:00:03,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:00:03,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:00:03,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:00:04,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:00:04,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:00:04,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4816 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-05 06:00:04,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:00:04,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199859852] [2022-04-05 06:00:04,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199859852] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:00:04,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650339297] [2022-04-05 06:00:04,706 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 06:00:04,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:00:04,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:00:04,708 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:00:04,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-05 06:00:04,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:00:04,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 69 conjunts are in the unsatisfiable core [2022-04-05 06:00:04,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:00:05,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4816 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-05 06:00:05,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:00:08,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4816 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-05 06:00:08,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650339297] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:00:08,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:00:08,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70, 70] total 140 [2022-04-05 06:00:08,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730626029] [2022-04-05 06:00:08,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:00:08,928 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-04-05 06:00:08,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:00:08,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-04-05 06:00:08,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2022-04-05 06:00:08,932 INFO L87 Difference]: Start difference. First operand 161 states and 164 transitions. Second operand has 140 states, 140 states have (on average 2.057142857142857) internal successors, (288), 139 states have internal predecessors, (288), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 06:00:14,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:00:14,732 INFO L93 Difference]: Finished difference Result 320 states and 395 transitions. [2022-04-05 06:00:14,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-04-05 06:00:14,732 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 2.057142857142857) internal successors, (288), 139 states have internal predecessors, (288), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 160 [2022-04-05 06:00:14,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:00:14,733 INFO L225 Difference]: With dead ends: 320 [2022-04-05 06:00:14,733 INFO L226 Difference]: Without dead ends: 299 [2022-04-05 06:00:14,738 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11860 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=28498, Invalid=47402, Unknown=0, NotChecked=0, Total=75900 [2022-04-05 06:00:14,739 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 146 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 06:00:14,739 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 36 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 06:00:14,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-04-05 06:00:14,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2022-04-05 06:00:14,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 294 states have (on average 1.0136054421768708) internal successors, (298), 294 states have internal predecessors, (298), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 06:00:14,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 302 transitions. [2022-04-05 06:00:14,788 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 302 transitions. Word has length 160 [2022-04-05 06:00:14,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:00:14,788 INFO L478 AbstractCegarLoop]: Abstraction has 299 states and 302 transitions. [2022-04-05 06:00:14,789 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 2.057142857142857) internal successors, (288), 139 states have internal predecessors, (288), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 06:00:14,789 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 302 transitions. [2022-04-05 06:00:14,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2022-04-05 06:00:14,792 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:00:14,793 INFO L499 BasicCegarLoop]: trace histogram [138, 136, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:00:14,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-05 06:00:14,997 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-05 06:00:14,997 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:00:14,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:00:14,998 INFO L85 PathProgramCache]: Analyzing trace with hash 396106729, now seen corresponding path program 8 times [2022-04-05 06:00:14,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:00:14,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603599998] [2022-04-05 06:00:14,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:00:14,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:00:15,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:00:20,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:00:20,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:00:20,278 INFO L134 CoverageAnalysis]: Checked inductivity of 19099 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-05 06:00:20,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:00:20,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603599998] [2022-04-05 06:00:20,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603599998] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:00:20,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748128618] [2022-04-05 06:00:20,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 06:00:20,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:00:20,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:00:20,279 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:00:20,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-05 06:00:20,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:00:20,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:00:20,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 682 conjuncts, 138 conjunts are in the unsatisfiable core [2022-04-05 06:00:20,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:00:20,882 INFO L134 CoverageAnalysis]: Checked inductivity of 19099 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-05 06:00:20,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:00:36,067 INFO L134 CoverageAnalysis]: Checked inductivity of 19099 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-05 06:00:36,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748128618] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:00:36,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:00:36,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [140, 139, 139] total 278 [2022-04-05 06:00:36,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364448002] [2022-04-05 06:00:36,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:00:36,068 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 278 states [2022-04-05 06:00:36,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:00:36,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 278 interpolants. [2022-04-05 06:00:36,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38228, Invalid=38778, Unknown=0, NotChecked=0, Total=77006 [2022-04-05 06:00:36,077 INFO L87 Difference]: Start difference. First operand 299 states and 302 transitions. Second operand has 278 states, 278 states have (on average 2.028776978417266) internal successors, (564), 277 states have internal predecessors, (564), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 06:00:58,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:00:58,065 INFO L93 Difference]: Finished difference Result 596 states and 740 transitions. [2022-04-05 06:00:58,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 277 states. [2022-04-05 06:00:58,066 INFO L78 Accepts]: Start accepts. Automaton has has 278 states, 278 states have (on average 2.028776978417266) internal successors, (564), 277 states have internal predecessors, (564), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 298 [2022-04-05 06:00:58,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:00:58,076 INFO L225 Difference]: With dead ends: 596 [2022-04-05 06:00:58,076 INFO L226 Difference]: Without dead ends: 575 [2022-04-05 06:00:58,087 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1010 GetRequests, 460 SyntacticMatches, 0 SemanticMatches, 550 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47533 ImplicationChecksByTransitivity, 40.0s TimeCoverageRelationStatistics Valid=114127, Invalid=190025, Unknown=0, NotChecked=0, Total=304152 [2022-04-05 06:00:58,094 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 284 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-05 06:00:58,095 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 46 Invalid, 1019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-05 06:00:58,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-04-05 06:00:58,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2022-04-05 06:00:58,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 570 states have (on average 1.0070175438596491) internal successors, (574), 570 states have internal predecessors, (574), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 06:00:58,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 578 transitions. [2022-04-05 06:00:58,127 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 578 transitions. Word has length 298 [2022-04-05 06:00:58,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:00:58,128 INFO L478 AbstractCegarLoop]: Abstraction has 575 states and 578 transitions. [2022-04-05 06:00:58,129 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 278 states, 278 states have (on average 2.028776978417266) internal successors, (564), 277 states have internal predecessors, (564), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 06:00:58,129 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 578 transitions. [2022-04-05 06:00:58,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 575 [2022-04-05 06:00:58,135 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:00:58,135 INFO L499 BasicCegarLoop]: trace histogram [276, 274, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:00:58,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-05 06:00:58,351 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:00:58,351 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:00:58,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:00:58,352 INFO L85 PathProgramCache]: Analyzing trace with hash 2081208913, now seen corresponding path program 9 times [2022-04-05 06:00:58,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:00:58,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145366284] [2022-04-05 06:00:58,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:00:58,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:00:58,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:01:18,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:01:18,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:01:18,555 INFO L134 CoverageAnalysis]: Checked inductivity of 76231 backedges. 825 proven. 75350 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-05 06:01:18,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:01:18,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145366284] [2022-04-05 06:01:18,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145366284] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:01:18,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029709577] [2022-04-05 06:01:18,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 06:01:18,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:01:18,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:01:18,556 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:01:18,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-05 06:01:18,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-04-05 06:01:18,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:01:18,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-05 06:01:18,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:01:20,325 INFO L134 CoverageAnalysis]: Checked inductivity of 76231 backedges. 826 proven. 55 refuted. 0 times theorem prover too weak. 75350 trivial. 0 not checked. [2022-04-05 06:01:20,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:01:22,063 INFO L134 CoverageAnalysis]: Checked inductivity of 76231 backedges. 826 proven. 55 refuted. 0 times theorem prover too weak. 75350 trivial. 0 not checked. [2022-04-05 06:01:22,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029709577] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:01:22,063 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:01:22,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [278, 14, 14] total 302 [2022-04-05 06:01:22,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645880595] [2022-04-05 06:01:22,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:01:22,064 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 302 states [2022-04-05 06:01:22,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:01:22,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 302 interpolants. [2022-04-05 06:01:22,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38552, Invalid=52350, Unknown=0, NotChecked=0, Total=90902 [2022-04-05 06:01:22,072 INFO L87 Difference]: Start difference. First operand 575 states and 578 transitions. Second operand has 302 states, 302 states have (on average 1.9801324503311257) internal successors, (598), 301 states have internal predecessors, (598), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 06:01:53,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:01:53,674 INFO L93 Difference]: Finished difference Result 616 states and 638 transitions. [2022-04-05 06:01:53,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 301 states. [2022-04-05 06:01:53,675 INFO L78 Accepts]: Start accepts. Automaton has has 302 states, 302 states have (on average 1.9801324503311257) internal successors, (598), 301 states have internal predecessors, (598), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 574 [2022-04-05 06:01:53,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:01:53,681 INFO L225 Difference]: With dead ends: 616 [2022-04-05 06:01:53,681 INFO L226 Difference]: Without dead ends: 595 [2022-04-05 06:01:53,694 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1724 GetRequests, 1126 SyntacticMatches, 0 SemanticMatches, 598 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51594 ImplicationChecksByTransitivity, 50.3s TimeCoverageRelationStatistics Valid=127438, Invalid=231962, Unknown=0, NotChecked=0, Total=359400 [2022-04-05 06:01:53,695 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 566 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 608 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 1293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 608 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-05 06:01:53,695 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [566 Valid, 73 Invalid, 1293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [608 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-05 06:01:53,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2022-04-05 06:01:53,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 589. [2022-04-05 06:01:53,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 584 states have (on average 1.0068493150684932) internal successors, (588), 584 states have internal predecessors, (588), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 06:01:53,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 592 transitions. [2022-04-05 06:01:53,718 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 592 transitions. Word has length 574 [2022-04-05 06:01:53,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:01:53,719 INFO L478 AbstractCegarLoop]: Abstraction has 589 states and 592 transitions. [2022-04-05 06:01:53,719 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 302 states, 302 states have (on average 1.9801324503311257) internal successors, (598), 301 states have internal predecessors, (598), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 06:01:53,719 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 592 transitions. [2022-04-05 06:01:53,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 589 [2022-04-05 06:01:53,722 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:01:53,723 INFO L499 BasicCegarLoop]: trace histogram [277, 275, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:01:53,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-05 06:01:53,925 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-05 06:01:53,926 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:01:53,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:01:53,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1341456501, now seen corresponding path program 10 times [2022-04-05 06:01:53,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:01:53,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71066106] [2022-04-05 06:01:53,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:01:53,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:01:54,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:02:14,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:02:14,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:02:14,168 INFO L134 CoverageAnalysis]: Checked inductivity of 76982 backedges. 828 proven. 75900 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2022-04-05 06:02:14,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:02:14,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71066106] [2022-04-05 06:02:14,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71066106] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:02:14,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328435605] [2022-04-05 06:02:14,169 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 06:02:14,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:02:14,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:02:14,170 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:02:14,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-05 06:02:14,339 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 06:02:14,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:02:14,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 1322 conjuncts, 277 conjunts are in the unsatisfiable core [2022-04-05 06:02:14,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:02:15,245 INFO L134 CoverageAnalysis]: Checked inductivity of 76982 backedges. 828 proven. 75900 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2022-04-05 06:02:15,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:03:16,010 INFO L134 CoverageAnalysis]: Checked inductivity of 76982 backedges. 828 proven. 75900 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2022-04-05 06:03:16,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328435605] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:03:16,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:03:16,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [279, 278, 278] total 556 [2022-04-05 06:03:16,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629505195] [2022-04-05 06:03:16,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:03:16,012 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 556 states [2022-04-05 06:03:16,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:03:16,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 556 interpolants. [2022-04-05 06:03:16,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153737, Invalid=154843, Unknown=0, NotChecked=0, Total=308580 [2022-04-05 06:03:16,040 INFO L87 Difference]: Start difference. First operand 589 states and 592 transitions. Second operand has 556 states, 556 states have (on average 2.014388489208633) internal successors, (1120), 555 states have internal predecessors, (1120), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 06:04:45,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:04:45,827 INFO L93 Difference]: Finished difference Result 1176 states and 1459 transitions. [2022-04-05 06:04:45,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 555 states. [2022-04-05 06:04:45,828 INFO L78 Accepts]: Start accepts. Automaton has has 556 states, 556 states have (on average 2.014388489208633) internal successors, (1120), 555 states have internal predecessors, (1120), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 588 [2022-04-05 06:04:45,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:04:45,832 INFO L225 Difference]: With dead ends: 1176 [2022-04-05 06:04:45,832 INFO L226 Difference]: Without dead ends: 1143 [2022-04-05 06:04:45,894 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 2007 GetRequests, 901 SyntacticMatches, 0 SemanticMatches, 1106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191676 ImplicationChecksByTransitivity, 161.9s TimeCoverageRelationStatistics Valid=460098, Invalid=766458, Unknown=0, NotChecked=0, Total=1226556 [2022-04-05 06:04:45,895 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 562 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1163 mSolverCounterSat, 834 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 834 IncrementalHoareTripleChecker+Valid, 1163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-05 06:04:45,895 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [562 Valid, 51 Invalid, 1997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [834 Valid, 1163 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-05 06:04:45,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2022-04-05 06:04:46,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 1143. [2022-04-05 06:04:46,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1143 states, 1138 states have (on average 1.0035149384885764) internal successors, (1142), 1138 states have internal predecessors, (1142), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 06:04:46,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1143 states to 1143 states and 1146 transitions. [2022-04-05 06:04:46,021 INFO L78 Accepts]: Start accepts. Automaton has 1143 states and 1146 transitions. Word has length 588 [2022-04-05 06:04:46,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:04:46,021 INFO L478 AbstractCegarLoop]: Abstraction has 1143 states and 1146 transitions. [2022-04-05 06:04:46,022 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 556 states, 556 states have (on average 2.014388489208633) internal successors, (1120), 555 states have internal predecessors, (1120), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 06:04:46,022 INFO L276 IsEmpty]: Start isEmpty. Operand 1143 states and 1146 transitions. [2022-04-05 06:04:46,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1143 [2022-04-05 06:04:46,032 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:04:46,032 INFO L499 BasicCegarLoop]: trace histogram [554, 552, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:04:46,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-04-05 06:04:46,232 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-05 06:04:46,233 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:04:46,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:04:46,233 INFO L85 PathProgramCache]: Analyzing trace with hash 642478185, now seen corresponding path program 11 times [2022-04-05 06:04:46,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:04:46,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953607433] [2022-04-05 06:04:46,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:04:46,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:04:47,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:08,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:06:08,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:08,532 INFO L134 CoverageAnalysis]: Checked inductivity of 307169 backedges. 1659 proven. 305256 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2022-04-05 06:06:08,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:06:08,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953607433] [2022-04-05 06:06:08,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953607433] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:06:08,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374049655] [2022-04-05 06:06:08,532 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 06:06:08,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:06:08,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:06:08,533 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:06:08,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-05 06:06:10,345 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 555 check-sat command(s) [2022-04-05 06:06:10,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:06:10,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 2430 conjuncts, 554 conjunts are in the unsatisfiable core [2022-04-05 06:06:10,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:06:11,996 INFO L134 CoverageAnalysis]: Checked inductivity of 307169 backedges. 1659 proven. 305256 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2022-04-05 06:06:11,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:10:23,522 INFO L134 CoverageAnalysis]: Checked inductivity of 307169 backedges. 1659 proven. 305256 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2022-04-05 06:10:23,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374049655] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:10:23,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:10:23,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [556, 555, 555] total 1110 [2022-04-05 06:10:23,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150621006] [2022-04-05 06:10:23,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:10:23,525 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 1110 states [2022-04-05 06:10:23,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:10:23,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 1110 interpolants. [2022-04-05 06:10:23,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=614388, Invalid=616602, Unknown=0, NotChecked=0, Total=1230990 [2022-04-05 06:10:23,678 INFO L87 Difference]: Start difference. First operand 1143 states and 1146 transitions. Second operand has 1110 states, 1110 states have (on average 2.007207207207207) internal successors, (2228), 1109 states have internal predecessors, (2228), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)