/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-b030c9e [2022-03-20 08:51:50,166 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 08:51:50,168 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 08:51:50,200 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 08:51:50,206 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 08:51:50,207 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 08:51:50,207 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 08:51:50,208 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 08:51:50,209 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 08:51:50,209 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 08:51:50,210 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 08:51:50,211 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 08:51:50,212 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 08:51:50,213 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 08:51:50,213 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 08:51:50,214 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 08:51:50,214 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 08:51:50,216 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 08:51:50,221 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 08:51:50,222 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 08:51:50,222 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 08:51:50,223 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-20 08:51:50,238 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 08:51:50,239 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 08:51:50,239 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 08:51:50,239 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 08:51:50,240 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 08:51:50,240 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 08:51:50,240 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 08:51:50,240 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 08:51:50,240 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 08:51:50,240 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 08:51:50,240 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 08:51:50,241 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 08:51:50,241 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 08:51:50,241 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 08:51:50,241 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 08:51:50,241 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 08:51:50,241 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 08:51:50,241 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 08:51:50,241 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 08:51:50,242 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 08:51:50,242 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 08:51:50,242 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 08:51:50,242 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 08:51:50,242 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 08:51:50,242 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 08:51:50,242 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 08:51:50,242 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-20 08:51:50,243 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-20 08:51:50,243 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 08:51:50,243 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 08:51:50,434 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 08:51:50,464 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 08:51:50,466 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 08:51:50,466 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 08:51:50,475 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 08:51:50,477 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_3.c [2022-03-20 08:51:50,526 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b11de38ac/edba178335c3479c8605710131cafa8b/FLAG6214463eb [2022-03-20 08:51:50,867 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 08:51:50,867 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_3.c [2022-03-20 08:51:50,872 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b11de38ac/edba178335c3479c8605710131cafa8b/FLAG6214463eb [2022-03-20 08:51:50,890 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b11de38ac/edba178335c3479c8605710131cafa8b [2022-03-20 08:51:50,892 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 08:51:50,894 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 08:51:50,896 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 08:51:50,896 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 08:51:50,898 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 08:51:50,899 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:51:50" (1/1) ... [2022-03-20 08:51:50,900 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e08370f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:51:50, skipping insertion in model container [2022-03-20 08:51:50,900 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:51:50" (1/1) ... [2022-03-20 08:51:50,905 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 08:51:50,916 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 08:51:51,067 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] [2022-03-20 08:51:51,080 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 08:51:51,085 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 08:51:51,093 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] [2022-03-20 08:51:51,096 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 08:51:51,104 INFO L208 MainTranslator]: Completed translation [2022-03-20 08:51:51,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:51:51 WrapperNode [2022-03-20 08:51:51,106 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 08:51:51,107 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 08:51:51,108 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 08:51:51,108 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 08:51:51,115 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:51:51" (1/1) ... [2022-03-20 08:51:51,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:51:51" (1/1) ... [2022-03-20 08:51:51,121 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:51:51" (1/1) ... [2022-03-20 08:51:51,121 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:51:51" (1/1) ... [2022-03-20 08:51:51,130 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:51:51" (1/1) ... [2022-03-20 08:51:51,134 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:51:51" (1/1) ... [2022-03-20 08:51:51,135 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:51:51" (1/1) ... [2022-03-20 08:51:51,139 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 08:51:51,140 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 08:51:51,140 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 08:51:51,140 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 08:51:51,141 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:51:51" (1/1) ... [2022-03-20 08:51:51,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 08:51:51,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:51:51,164 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) [2022-03-20 08:51:51,173 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 [2022-03-20 08:51:51,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 08:51:51,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 08:51:51,220 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 08:51:51,220 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 08:51:51,220 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 08:51:51,221 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 08:51:51,221 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 08:51:51,221 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 08:51:51,222 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 08:51:51,222 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 08:51:51,222 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 08:51:51,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 08:51:51,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 08:51:51,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 08:51:51,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 08:51:51,222 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 08:51:51,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 08:51:51,267 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 08:51:51,269 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 08:51:51,389 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 08:51:51,392 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 08:51:51,392 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 08:51:51,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:51:51 BoogieIcfgContainer [2022-03-20 08:51:51,393 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 08:51:51,394 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 08:51:51,394 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 08:51:51,395 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 08:51:51,397 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:51:51" (1/1) ... [2022-03-20 08:51:51,398 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-03-20 08:52:09,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 08:52:09 BasicIcfg [2022-03-20 08:52:09,661 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 08:52:09,663 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 08:52:09,663 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 08:52:09,665 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 08:52:09,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 08:51:50" (1/4) ... [2022-03-20 08:52:09,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8823ccc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:52:09, skipping insertion in model container [2022-03-20 08:52:09,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:51:51" (2/4) ... [2022-03-20 08:52:09,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8823ccc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:52:09, skipping insertion in model container [2022-03-20 08:52:09,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:51:51" (3/4) ... [2022-03-20 08:52:09,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8823ccc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 08:52:09, skipping insertion in model container [2022-03-20 08:52:09,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 08:52:09" (4/4) ... [2022-03-20 08:52:09,667 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_3.cqvasr [2022-03-20 08:52:09,670 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 08:52:09,670 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 08:52:09,698 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 08:52:09,703 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 [2022-03-20 08:52:09,703 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 08:52:09,713 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) [2022-03-20 08:52:09,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-20 08:52:09,715 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:52:09,716 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:52:09,716 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:52:09,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:52:09,723 INFO L85 PathProgramCache]: Analyzing trace with hash 164364990, now seen corresponding path program 1 times [2022-03-20 08:52:09,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:52:09,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452369821] [2022-03-20 08:52:09,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:52:09,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:52:09,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:52:09,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:52:09,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:52:09,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:52:09,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:52:09,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452369821] [2022-03-20 08:52:09,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452369821] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:52:09,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:52:09,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 08:52:09,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557913611] [2022-03-20 08:52:09,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:52:09,843 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 08:52:09,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:52:09,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 08:52:09,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 08:52:09,865 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) [2022-03-20 08:52:09,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:52:09,889 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2022-03-20 08:52:09,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 08:52:09,892 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 [2022-03-20 08:52:09,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:52:09,896 INFO L225 Difference]: With dead ends: 34 [2022-03-20 08:52:09,896 INFO L226 Difference]: Without dead ends: 14 [2022-03-20 08:52:09,901 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 [2022-03-20 08:52:09,905 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 14 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:52:09,906 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 24 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:52:09,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-03-20 08:52:09,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-03-20 08:52:09,926 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) [2022-03-20 08:52:09,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-03-20 08:52:09,927 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 12 [2022-03-20 08:52:09,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:52:09,928 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-03-20 08:52:09,928 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) [2022-03-20 08:52:09,928 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-03-20 08:52:09,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-20 08:52:09,929 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:52:09,929 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:52:09,929 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 08:52:09,930 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:52:09,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:52:09,932 INFO L85 PathProgramCache]: Analyzing trace with hash 165288511, now seen corresponding path program 1 times [2022-03-20 08:52:09,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:52:09,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530606609] [2022-03-20 08:52:09,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:52:09,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:52:09,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:52:09,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:52:09,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:52:10,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:52:10,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:52:10,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530606609] [2022-03-20 08:52:10,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530606609] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:52:10,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:52:10,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 08:52:10,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643632852] [2022-03-20 08:52:10,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:52:10,008 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 08:52:10,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:52:10,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 08:52:10,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 08:52:10,011 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) [2022-03-20 08:52:10,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:52:10,036 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2022-03-20 08:52:10,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 08:52:10,037 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 [2022-03-20 08:52:10,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:52:10,037 INFO L225 Difference]: With dead ends: 24 [2022-03-20 08:52:10,037 INFO L226 Difference]: Without dead ends: 16 [2022-03-20 08:52:10,040 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 [2022-03-20 08:52:10,041 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 12 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:52:10,041 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 20 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:52:10,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-03-20 08:52:10,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-03-20 08:52:10,047 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) [2022-03-20 08:52:10,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-03-20 08:52:10,050 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2022-03-20 08:52:10,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:52:10,054 INFO L478 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-03-20 08:52:10,055 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) [2022-03-20 08:52:10,055 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-03-20 08:52:10,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-20 08:52:10,055 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:52:10,055 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:52:10,055 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 08:52:10,055 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:52:10,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:52:10,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1054746269, now seen corresponding path program 1 times [2022-03-20 08:52:10,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:52:10,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388444189] [2022-03-20 08:52:10,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:52:10,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:52:10,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:52:10,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:52:10,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:52:10,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 08:52:10,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:52:10,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388444189] [2022-03-20 08:52:10,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388444189] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:52:10,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:52:10,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 08:52:10,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918995082] [2022-03-20 08:52:10,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:52:10,091 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 08:52:10,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:52:10,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 08:52:10,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 08:52:10,092 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) [2022-03-20 08:52:10,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:52:10,107 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2022-03-20 08:52:10,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 08:52:10,107 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 [2022-03-20 08:52:10,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:52:10,107 INFO L225 Difference]: With dead ends: 22 [2022-03-20 08:52:10,107 INFO L226 Difference]: Without dead ends: 17 [2022-03-20 08:52:10,108 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 [2022-03-20 08:52:10,108 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 [2022-03-20 08:52:10,109 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] [2022-03-20 08:52:10,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-20 08:52:10,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-03-20 08:52:10,111 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) [2022-03-20 08:52:10,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-03-20 08:52:10,111 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2022-03-20 08:52:10,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:52:10,111 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-03-20 08:52:10,111 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) [2022-03-20 08:52:10,112 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-03-20 08:52:10,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-20 08:52:10,112 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:52:10,112 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:52:10,112 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 08:52:10,112 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:52:10,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:52:10,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1687477607, now seen corresponding path program 1 times [2022-03-20 08:52:10,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:52:10,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57368453] [2022-03-20 08:52:10,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:52:10,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:52:10,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:52:10,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:52:10,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:52:10,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 08:52:10,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:52:10,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57368453] [2022-03-20 08:52:10,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57368453] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:52:10,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184874475] [2022-03-20 08:52:10,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:52:10,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:52:10,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:52:10,157 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) [2022-03-20 08:52:10,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 08:52:10,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:52:10,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-20 08:52:10,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:52:10,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 08:52:10,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:52:10,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 08:52:10,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184874475] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:52:10,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:52:10,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-20 08:52:10,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833304997] [2022-03-20 08:52:10,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:52:10,287 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 08:52:10,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:52:10,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 08:52:10,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-20 08:52:10,288 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) [2022-03-20 08:52:10,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:52:10,343 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2022-03-20 08:52:10,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 08:52:10,343 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 [2022-03-20 08:52:10,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:52:10,344 INFO L225 Difference]: With dead ends: 31 [2022-03-20 08:52:10,344 INFO L226 Difference]: Without dead ends: 22 [2022-03-20 08:52:10,344 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 [2022-03-20 08:52:10,345 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 18 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:52:10,345 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 29 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:52:10,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-03-20 08:52:10,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-03-20 08:52:10,348 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) [2022-03-20 08:52:10,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-03-20 08:52:10,348 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 15 [2022-03-20 08:52:10,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:52:10,348 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-03-20 08:52:10,348 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) [2022-03-20 08:52:10,349 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-03-20 08:52:10,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-20 08:52:10,349 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:52:10,349 INFO L499 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:52:10,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 08:52:10,563 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 [2022-03-20 08:52:10,563 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:52:10,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:52:10,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1507884679, now seen corresponding path program 1 times [2022-03-20 08:52:10,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:52:10,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182431705] [2022-03-20 08:52:10,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:52:10,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:52:10,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:52:10,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:52:10,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:52:10,603 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 08:52:10,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:52:10,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182431705] [2022-03-20 08:52:10,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182431705] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:52:10,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178579406] [2022-03-20 08:52:10,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:52:10,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:52:10,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:52:10,607 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) [2022-03-20 08:52:10,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 08:52:10,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:52:10,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 08:52:10,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:52:10,704 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 08:52:10,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:52:10,750 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 08:52:10,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178579406] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:52:10,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:52:10,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-03-20 08:52:10,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050832675] [2022-03-20 08:52:10,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:52:10,751 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 08:52:10,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:52:10,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 08:52:10,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-03-20 08:52:10,752 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) [2022-03-20 08:52:10,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:52:10,814 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2022-03-20 08:52:10,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 08:52:10,814 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 [2022-03-20 08:52:10,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:52:10,814 INFO L225 Difference]: With dead ends: 42 [2022-03-20 08:52:10,815 INFO L226 Difference]: Without dead ends: 30 [2022-03-20 08:52:10,815 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 [2022-03-20 08:52:10,816 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 16 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:52:10,816 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 35 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:52:10,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-20 08:52:10,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-03-20 08:52:10,819 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) [2022-03-20 08:52:10,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-03-20 08:52:10,820 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 21 [2022-03-20 08:52:10,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:52:10,820 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-03-20 08:52:10,820 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) [2022-03-20 08:52:10,820 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-03-20 08:52:10,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 08:52:10,821 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:52:10,821 INFO L499 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:52:10,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 08:52:11,043 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 [2022-03-20 08:52:11,044 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:52:11,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:52:11,044 INFO L85 PathProgramCache]: Analyzing trace with hash 163921129, now seen corresponding path program 2 times [2022-03-20 08:52:11,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:52:11,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63508697] [2022-03-20 08:52:11,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:52:11,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:52:11,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:52:11,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:52:11,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:52:11,105 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 08:52:11,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:52:11,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63508697] [2022-03-20 08:52:11,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63508697] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:52:11,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051535033] [2022-03-20 08:52:11,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 08:52:11,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:52:11,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:52:11,107 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) [2022-03-20 08:52:11,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 08:52:11,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 08:52:11,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:52:11,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 08:52:11,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:52:11,197 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 08:52:11,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:52:11,320 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 08:52:11,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051535033] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:52:11,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:52:11,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-03-20 08:52:11,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094028797] [2022-03-20 08:52:11,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:52:11,321 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 08:52:11,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:52:11,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 08:52:11,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-03-20 08:52:11,324 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) [2022-03-20 08:52:11,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:52:11,505 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2022-03-20 08:52:11,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 08:52:11,506 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 [2022-03-20 08:52:11,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:52:11,508 INFO L225 Difference]: With dead ends: 58 [2022-03-20 08:52:11,508 INFO L226 Difference]: Without dead ends: 46 [2022-03-20 08:52:11,509 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 [2022-03-20 08:52:11,511 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 24 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:52:11,512 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 30 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:52:11,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-20 08:52:11,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-03-20 08:52:11,524 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) [2022-03-20 08:52:11,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2022-03-20 08:52:11,526 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 29 [2022-03-20 08:52:11,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:52:11,526 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2022-03-20 08:52:11,526 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) [2022-03-20 08:52:11,527 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2022-03-20 08:52:11,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-20 08:52:11,529 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:52:11,529 INFO L499 BasicCegarLoop]: trace histogram [16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:52:11,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 08:52:11,745 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 [2022-03-20 08:52:11,745 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:52:11,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:52:11,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1399757879, now seen corresponding path program 3 times [2022-03-20 08:52:11,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:52:11,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612818881] [2022-03-20 08:52:11,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:52:11,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:52:11,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:52:11,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:52:11,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:52:11,919 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 08:52:11,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:52:11,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612818881] [2022-03-20 08:52:11,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612818881] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:52:11,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307819552] [2022-03-20 08:52:11,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 08:52:11,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:52:11,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:52:11,921 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) [2022-03-20 08:52:11,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 08:52:11,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-20 08:52:11,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:52:11,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 08:52:11,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:52:12,049 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 70 proven. 4 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-03-20 08:52:12,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:52:12,148 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 70 proven. 4 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-03-20 08:52:12,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307819552] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:52:12,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:52:12,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 5, 5] total 24 [2022-03-20 08:52:12,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193233360] [2022-03-20 08:52:12,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:52:12,149 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 08:52:12,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:52:12,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 08:52:12,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-03-20 08:52:12,150 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 24 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 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) [2022-03-20 08:52:12,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:52:12,481 INFO L93 Difference]: Finished difference Result 68 states and 83 transitions. [2022-03-20 08:52:12,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 08:52:12,481 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 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 [2022-03-20 08:52:12,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:52:12,483 INFO L225 Difference]: With dead ends: 68 [2022-03-20 08:52:12,483 INFO L226 Difference]: Without dead ends: 56 [2022-03-20 08:52:12,484 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 08:52:12,484 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 50 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 08:52:12,484 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 24 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 08:52:12,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-20 08:52:12,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-03-20 08:52:12,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 51 states have internal predecessors, (59), 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) [2022-03-20 08:52:12,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2022-03-20 08:52:12,491 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 45 [2022-03-20 08:52:12,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:52:12,491 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2022-03-20 08:52:12,492 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 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) [2022-03-20 08:52:12,492 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2022-03-20 08:52:12,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 08:52:12,493 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:52:12,493 INFO L499 BasicCegarLoop]: trace histogram [21, 15, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:52:12,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 08:52:12,699 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 [2022-03-20 08:52:12,699 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:52:12,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:52:12,700 INFO L85 PathProgramCache]: Analyzing trace with hash -809396335, now seen corresponding path program 4 times [2022-03-20 08:52:12,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:52:12,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058349815] [2022-03-20 08:52:12,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:52:12,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:52:12,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:52:12,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:52:12,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:52:12,863 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-20 08:52:12,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:52:12,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058349815] [2022-03-20 08:52:12,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058349815] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:52:12,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096377146] [2022-03-20 08:52:12,864 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 08:52:12,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:52:12,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:52:12,865 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) [2022-03-20 08:52:12,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 08:52:12,908 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 08:52:12,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:52:12,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 08:52:12,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:52:13,009 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-20 08:52:13,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:52:13,388 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-20 08:52:13,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096377146] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:52:13,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:52:13,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-03-20 08:52:13,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416727178] [2022-03-20 08:52:13,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:52:13,389 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-20 08:52:13,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:52:13,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-20 08:52:13,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 08:52:13,391 INFO L87 Difference]: Start difference. First operand 56 states and 63 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) [2022-03-20 08:52:13,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:52:13,887 INFO L93 Difference]: Finished difference Result 110 states and 141 transitions. [2022-03-20 08:52:13,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-20 08:52:13,887 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 55 [2022-03-20 08:52:13,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:52:13,888 INFO L225 Difference]: With dead ends: 110 [2022-03-20 08:52:13,888 INFO L226 Difference]: Without dead ends: 90 [2022-03-20 08:52:13,889 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1718, Invalid=2838, Unknown=0, NotChecked=0, Total=4556 [2022-03-20 08:52:13,890 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 42 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 08:52:13,890 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 35 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 08:52:13,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-20 08:52:13,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-03-20 08:52:13,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.0941176470588236) internal successors, (93), 85 states have internal predecessors, (93), 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) [2022-03-20 08:52:13,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 97 transitions. [2022-03-20 08:52:13,897 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 97 transitions. Word has length 55 [2022-03-20 08:52:13,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:52:13,897 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 97 transitions. [2022-03-20 08:52:13,897 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) [2022-03-20 08:52:13,897 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 97 transitions. [2022-03-20 08:52:13,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-20 08:52:13,898 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:52:13,898 INFO L499 BasicCegarLoop]: trace histogram [38, 32, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:52:13,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 08:52:14,098 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 [2022-03-20 08:52:14,099 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:52:14,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:52:14,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1122744237, now seen corresponding path program 5 times [2022-03-20 08:52:14,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:52:14,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576177922] [2022-03-20 08:52:14,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:52:14,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:52:14,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:52:14,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:52:14,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:52:14,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-20 08:52:14,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:52:14,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576177922] [2022-03-20 08:52:14,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576177922] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:52:14,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683503744] [2022-03-20 08:52:14,560 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 08:52:14,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:52:14,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:52:14,561 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) [2022-03-20 08:52:14,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 08:52:14,612 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 39 check-sat command(s) [2022-03-20 08:52:14,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:52:14,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-20 08:52:14,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:52:14,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-20 08:52:14,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:52:15,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-20 08:52:15,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683503744] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:52:15,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:52:15,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2022-03-20 08:52:15,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806410670] [2022-03-20 08:52:15,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:52:15,947 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-03-20 08:52:15,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:52:15,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-03-20 08:52:15,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-03-20 08:52:15,950 INFO L87 Difference]: Start difference. First operand 90 states and 97 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) [2022-03-20 08:52:17,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:52:17,575 INFO L93 Difference]: Finished difference Result 178 states and 226 transitions. [2022-03-20 08:52:17,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-20 08:52:17,575 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 89 [2022-03-20 08:52:17,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:52:17,576 INFO L225 Difference]: With dead ends: 178 [2022-03-20 08:52:17,576 INFO L226 Difference]: Without dead ends: 158 [2022-03-20 08:52:17,593 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2865 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=6903, Invalid=11457, Unknown=0, NotChecked=0, Total=18360 [2022-03-20 08:52:17,593 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 76 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 08:52:17,594 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 50 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 08:52:17,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-03-20 08:52:17,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2022-03-20 08:52:17,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.0522875816993464) internal successors, (161), 153 states have internal predecessors, (161), 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) [2022-03-20 08:52:17,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 165 transitions. [2022-03-20 08:52:17,602 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 165 transitions. Word has length 89 [2022-03-20 08:52:17,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:52:17,602 INFO L478 AbstractCegarLoop]: Abstraction has 158 states and 165 transitions. [2022-03-20 08:52:17,603 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) [2022-03-20 08:52:17,603 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 165 transitions. [2022-03-20 08:52:17,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-03-20 08:52:17,604 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:52:17,604 INFO L499 BasicCegarLoop]: trace histogram [72, 66, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:52:17,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 08:52:17,818 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 [2022-03-20 08:52:17,819 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:52:17,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:52:17,819 INFO L85 PathProgramCache]: Analyzing trace with hash -666328347, now seen corresponding path program 6 times [2022-03-20 08:52:17,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:52:17,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792928435] [2022-03-20 08:52:17,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:52:17,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:52:17,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:52:19,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:52:19,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:52:19,281 INFO L134 CoverageAnalysis]: Checked inductivity of 5185 backedges. 737 proven. 4422 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-20 08:52:19,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:52:19,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792928435] [2022-03-20 08:52:19,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792928435] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:52:19,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366072003] [2022-03-20 08:52:19,281 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 08:52:19,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:52:19,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:52:19,282 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) [2022-03-20 08:52:19,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 08:52:19,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2022-03-20 08:52:19,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:52:19,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 08:52:19,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:52:19,791 INFO L134 CoverageAnalysis]: Checked inductivity of 5185 backedges. 858 proven. 36 refuted. 0 times theorem prover too weak. 4291 trivial. 0 not checked. [2022-03-20 08:52:19,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:52:20,282 INFO L134 CoverageAnalysis]: Checked inductivity of 5185 backedges. 858 proven. 36 refuted. 0 times theorem prover too weak. 4291 trivial. 0 not checked. [2022-03-20 08:52:20,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366072003] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:52:20,282 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:52:20,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 9, 9] total 84 [2022-03-20 08:52:20,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232446698] [2022-03-20 08:52:20,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:52:20,283 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-03-20 08:52:20,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:52:20,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-03-20 08:52:20,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-03-20 08:52:20,288 INFO L87 Difference]: Start difference. First operand 158 states and 165 transitions. Second operand has 84 states, 84 states have (on average 2.107142857142857) internal successors, (177), 83 states have internal predecessors, (177), 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) [2022-03-20 08:52:22,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:52:22,882 INFO L93 Difference]: Finished difference Result 196 states and 227 transitions. [2022-03-20 08:52:22,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-20 08:52:22,882 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.107142857142857) internal successors, (177), 83 states have internal predecessors, (177), 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 157 [2022-03-20 08:52:22,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:52:22,883 INFO L225 Difference]: With dead ends: 196 [2022-03-20 08:52:22,883 INFO L226 Difference]: Without dead ends: 176 [2022-03-20 08:52:22,888 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3321 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=10209, Invalid=16851, Unknown=0, NotChecked=0, Total=27060 [2022-03-20 08:52:22,888 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 170 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 515 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 515 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 08:52:22,888 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 44 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [515 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 08:52:22,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-03-20 08:52:22,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2022-03-20 08:52:22,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 171 states have (on average 1.0935672514619883) internal successors, (187), 171 states have internal predecessors, (187), 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) [2022-03-20 08:52:22,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 191 transitions. [2022-03-20 08:52:22,898 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 191 transitions. Word has length 157 [2022-03-20 08:52:22,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:52:22,898 INFO L478 AbstractCegarLoop]: Abstraction has 176 states and 191 transitions. [2022-03-20 08:52:22,898 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.107142857142857) internal successors, (177), 83 states have internal predecessors, (177), 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) [2022-03-20 08:52:22,899 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 191 transitions. [2022-03-20 08:52:22,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-03-20 08:52:22,900 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:52:22,900 INFO L499 BasicCegarLoop]: trace histogram [81, 67, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:52:22,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 08:52:23,113 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 [2022-03-20 08:52:23,113 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:52:23,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:52:23,114 INFO L85 PathProgramCache]: Analyzing trace with hash -28776167, now seen corresponding path program 7 times [2022-03-20 08:52:23,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:52:23,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984357310] [2022-03-20 08:52:23,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:52:23,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:52:23,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:52:24,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:52:24,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:52:24,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6562 backedges. 1836 proven. 4556 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-03-20 08:52:24,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:52:24,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984357310] [2022-03-20 08:52:24,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984357310] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:52:24,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84712451] [2022-03-20 08:52:24,635 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 08:52:24,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:52:24,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:52:24,636 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) [2022-03-20 08:52:24,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 08:52:24,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:52:24,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-20 08:52:24,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:52:24,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6562 backedges. 1836 proven. 4556 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-03-20 08:52:24,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:52:29,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6562 backedges. 1836 proven. 4556 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-03-20 08:52:29,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84712451] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:52:29,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:52:29,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70, 70] total 140 [2022-03-20 08:52:29,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504394019] [2022-03-20 08:52:29,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:52:29,131 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-03-20 08:52:29,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:52:29,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-03-20 08:52:29,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2022-03-20 08:52:29,134 INFO L87 Difference]: Start difference. First operand 176 states and 191 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) [2022-03-20 08:52:34,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:52:34,994 INFO L93 Difference]: Finished difference Result 350 states and 449 transitions. [2022-03-20 08:52:34,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-03-20 08:52:34,994 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 175 [2022-03-20 08:52:34,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:52:34,996 INFO L225 Difference]: With dead ends: 350 [2022-03-20 08:52:34,996 INFO L226 Difference]: Without dead ends: 314 [2022-03-20 08:52:35,000 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 557 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11860 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=28498, Invalid=47402, Unknown=0, NotChecked=0, Total=75900 [2022-03-20 08:52:35,000 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 146 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 08:52:35,000 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 40 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 08:52:35,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-03-20 08:52:35,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 314. [2022-03-20 08:52:35,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 309 states have (on average 1.051779935275081) internal successors, (325), 309 states have internal predecessors, (325), 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) [2022-03-20 08:52:35,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 329 transitions. [2022-03-20 08:52:35,013 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 329 transitions. Word has length 175 [2022-03-20 08:52:35,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:52:35,014 INFO L478 AbstractCegarLoop]: Abstraction has 314 states and 329 transitions. [2022-03-20 08:52:35,014 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) [2022-03-20 08:52:35,014 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 329 transitions. [2022-03-20 08:52:35,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2022-03-20 08:52:35,026 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:52:35,026 INFO L499 BasicCegarLoop]: trace histogram [150, 136, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:52:35,049 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-20 08:52:35,239 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 [2022-03-20 08:52:35,239 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:52:35,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:52:35,240 INFO L85 PathProgramCache]: Analyzing trace with hash 270983653, now seen corresponding path program 8 times [2022-03-20 08:52:35,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:52:35,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589227771] [2022-03-20 08:52:35,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:52:35,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:52:35,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:52:40,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:52:40,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:52:40,865 INFO L134 CoverageAnalysis]: Checked inductivity of 22501 backedges. 3699 proven. 18632 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-03-20 08:52:40,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:52:40,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589227771] [2022-03-20 08:52:40,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589227771] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:52:40,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821883820] [2022-03-20 08:52:40,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 08:52:40,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:52:40,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:52:40,880 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) [2022-03-20 08:52:40,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 08:52:41,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 08:52:41,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:52:41,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 138 conjunts are in the unsatisfiable core [2022-03-20 08:52:41,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:52:41,575 INFO L134 CoverageAnalysis]: Checked inductivity of 22501 backedges. 3699 proven. 18632 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-03-20 08:52:41,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:52:57,583 INFO L134 CoverageAnalysis]: Checked inductivity of 22501 backedges. 3699 proven. 18632 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-03-20 08:52:57,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821883820] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:52:57,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:52:57,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [140, 139, 139] total 278 [2022-03-20 08:52:57,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092510076] [2022-03-20 08:52:57,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:52:57,584 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 278 states [2022-03-20 08:52:57,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:52:57,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 278 interpolants. [2022-03-20 08:52:57,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38228, Invalid=38778, Unknown=0, NotChecked=0, Total=77006 [2022-03-20 08:52:57,594 INFO L87 Difference]: Start difference. First operand 314 states and 329 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) [2022-03-20 08:53:20,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:53:20,091 INFO L93 Difference]: Finished difference Result 626 states and 794 transitions. [2022-03-20 08:53:20,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 277 states. [2022-03-20 08:53:20,091 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 313 [2022-03-20 08:53:20,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:53:20,094 INFO L225 Difference]: With dead ends: 626 [2022-03-20 08:53:20,094 INFO L226 Difference]: Without dead ends: 590 [2022-03-20 08:53:20,108 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1040 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 550 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47533 ImplicationChecksByTransitivity, 41.8s TimeCoverageRelationStatistics Valid=114127, Invalid=190025, Unknown=0, NotChecked=0, Total=304152 [2022-03-20 08:53:20,109 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 284 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 420 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 420 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 08:53:20,109 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 65 Invalid, 1052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [420 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 08:53:20,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2022-03-20 08:53:20,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 590. [2022-03-20 08:53:20,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 585 states have (on average 1.0273504273504273) internal successors, (601), 585 states have internal predecessors, (601), 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) [2022-03-20 08:53:20,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 605 transitions. [2022-03-20 08:53:20,128 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 605 transitions. Word has length 313 [2022-03-20 08:53:20,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:53:20,128 INFO L478 AbstractCegarLoop]: Abstraction has 590 states and 605 transitions. [2022-03-20 08:53:20,129 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) [2022-03-20 08:53:20,129 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 605 transitions. [2022-03-20 08:53:20,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 590 [2022-03-20 08:53:20,161 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:53:20,161 INFO L499 BasicCegarLoop]: trace histogram [288, 274, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:53:20,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 08:53:20,374 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 [2022-03-20 08:53:20,375 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:53:20,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:53:20,375 INFO L85 PathProgramCache]: Analyzing trace with hash -404183427, now seen corresponding path program 9 times [2022-03-20 08:53:20,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:53:20,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138279931] [2022-03-20 08:53:20,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:53:20,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:53:20,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:53:41,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:53:41,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:53:41,699 INFO L134 CoverageAnalysis]: Checked inductivity of 82945 backedges. 7425 proven. 75350 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-03-20 08:53:41,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:53:41,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138279931] [2022-03-20 08:53:41,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138279931] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:53:41,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373206576] [2022-03-20 08:53:41,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 08:53:41,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:53:41,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:53:41,701 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) [2022-03-20 08:53:41,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 08:53:41,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2022-03-20 08:53:41,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:53:41,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 08:53:41,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:53:44,712 INFO L134 CoverageAnalysis]: Checked inductivity of 82945 backedges. 7946 proven. 196 refuted. 0 times theorem prover too weak. 74803 trivial. 0 not checked. [2022-03-20 08:53:44,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:53:47,843 INFO L134 CoverageAnalysis]: Checked inductivity of 82945 backedges. 7946 proven. 196 refuted. 0 times theorem prover too weak. 74803 trivial. 0 not checked. [2022-03-20 08:53:47,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373206576] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:53:47,844 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:53:47,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [278, 17, 17] total 308 [2022-03-20 08:53:47,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610852797] [2022-03-20 08:53:47,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:53:47,845 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 308 states [2022-03-20 08:53:47,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:53:47,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 308 interpolants. [2022-03-20 08:53:47,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46973, Invalid=47583, Unknown=0, NotChecked=0, Total=94556 [2022-03-20 08:53:47,854 INFO L87 Difference]: Start difference. First operand 590 states and 605 transitions. Second operand has 308 states, 308 states have (on average 2.029220779220779) internal successors, (625), 307 states have internal predecessors, (625), 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) [2022-03-20 08:54:20,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:54:20,920 INFO L93 Difference]: Finished difference Result 660 states and 723 transitions. [2022-03-20 08:54:20,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 308 states. [2022-03-20 08:54:20,921 INFO L78 Accepts]: Start accepts. Automaton has has 308 states, 308 states have (on average 2.029220779220779) internal successors, (625), 307 states have internal predecessors, (625), 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 589 [2022-03-20 08:54:20,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:54:20,924 INFO L225 Difference]: With dead ends: 660 [2022-03-20 08:54:20,924 INFO L226 Difference]: Without dead ends: 624 [2022-03-20 08:54:20,940 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1790 GetRequests, 1179 SyntacticMatches, 0 SemanticMatches, 611 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46725 ImplicationChecksByTransitivity, 55.5s TimeCoverageRelationStatistics Valid=140913, Invalid=234243, Unknown=0, NotChecked=0, Total=375156 [2022-03-20 08:54:20,941 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 908 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 967 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 908 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 967 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 08:54:20,941 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [908 Valid, 59 Invalid, 1651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [967 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 08:54:20,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2022-03-20 08:54:20,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 624. [2022-03-20 08:54:20,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 619 states have (on average 1.0516962843295639) internal successors, (651), 619 states have internal predecessors, (651), 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) [2022-03-20 08:54:20,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 655 transitions. [2022-03-20 08:54:20,959 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 655 transitions. Word has length 589 [2022-03-20 08:54:20,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:54:20,960 INFO L478 AbstractCegarLoop]: Abstraction has 624 states and 655 transitions. [2022-03-20 08:54:20,960 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 308 states, 308 states have (on average 2.029220779220779) internal successors, (625), 307 states have internal predecessors, (625), 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) [2022-03-20 08:54:20,960 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 655 transitions. [2022-03-20 08:54:20,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 624 [2022-03-20 08:54:20,964 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:54:20,964 INFO L499 BasicCegarLoop]: trace histogram [305, 275, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:54:20,980 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-03-20 08:54:21,167 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 [2022-03-20 08:54:21,167 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:54:21,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:54:21,168 INFO L85 PathProgramCache]: Analyzing trace with hash -876081783, now seen corresponding path program 10 times [2022-03-20 08:54:21,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:54:21,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949630102] [2022-03-20 08:54:21,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:54:21,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:54:21,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:54:43,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:54:43,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:54:43,030 INFO L134 CoverageAnalysis]: Checked inductivity of 93026 backedges. 16284 proven. 75900 refuted. 0 times theorem prover too weak. 842 trivial. 0 not checked. [2022-03-20 08:54:43,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:54:43,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949630102] [2022-03-20 08:54:43,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949630102] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:54:43,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037811922] [2022-03-20 08:54:43,030 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 08:54:43,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:54:43,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:54:43,031 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) [2022-03-20 08:54:43,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 08:54:43,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 08:54:43,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:54:43,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 1346 conjuncts, 277 conjunts are in the unsatisfiable core [2022-03-20 08:54:43,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:54:44,226 INFO L134 CoverageAnalysis]: Checked inductivity of 93026 backedges. 16284 proven. 75900 refuted. 0 times theorem prover too weak. 842 trivial. 0 not checked. [2022-03-20 08:54:44,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:55:50,049 INFO L134 CoverageAnalysis]: Checked inductivity of 93026 backedges. 16284 proven. 75900 refuted. 0 times theorem prover too weak. 842 trivial. 0 not checked. [2022-03-20 08:55:50,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037811922] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:55:50,049 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:55:50,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [279, 278, 278] total 556 [2022-03-20 08:55:50,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594634933] [2022-03-20 08:55:50,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:55:50,052 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 556 states [2022-03-20 08:55:50,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:55:50,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 556 interpolants. [2022-03-20 08:55:50,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153737, Invalid=154843, Unknown=0, NotChecked=0, Total=308580 [2022-03-20 08:55:50,081 INFO L87 Difference]: Start difference. First operand 624 states and 655 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) [2022-03-20 08:57:24,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:57:24,649 INFO L93 Difference]: Finished difference Result 1246 states and 1585 transitions. [2022-03-20 08:57:24,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 555 states. [2022-03-20 08:57:24,650 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 623 [2022-03-20 08:57:24,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:57:24,654 INFO L225 Difference]: With dead ends: 1246 [2022-03-20 08:57:24,654 INFO L226 Difference]: Without dead ends: 1178 [2022-03-20 08:57:24,720 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 2077 GetRequests, 971 SyntacticMatches, 0 SemanticMatches, 1106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191676 ImplicationChecksByTransitivity, 173.3s TimeCoverageRelationStatistics Valid=460098, Invalid=766458, Unknown=0, NotChecked=0, Total=1226556 [2022-03-20 08:57:24,721 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 562 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1180 mSolverCounterSat, 834 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 2014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 834 IncrementalHoareTripleChecker+Valid, 1180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 08:57:24,721 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [562 Valid, 60 Invalid, 2014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [834 Valid, 1180 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-20 08:57:24,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2022-03-20 08:57:24,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 1178. [2022-03-20 08:57:24,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1178 states, 1173 states have (on average 1.0272804774083546) internal successors, (1205), 1173 states have internal predecessors, (1205), 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) [2022-03-20 08:57:24,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1178 states to 1178 states and 1209 transitions. [2022-03-20 08:57:24,876 INFO L78 Accepts]: Start accepts. Automaton has 1178 states and 1209 transitions. Word has length 623 [2022-03-20 08:57:24,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:57:24,877 INFO L478 AbstractCegarLoop]: Abstraction has 1178 states and 1209 transitions. [2022-03-20 08:57:24,878 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) [2022-03-20 08:57:24,878 INFO L276 IsEmpty]: Start isEmpty. Operand 1178 states and 1209 transitions. [2022-03-20 08:57:24,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1178 [2022-03-20 08:57:24,889 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:57:24,889 INFO L499 BasicCegarLoop]: trace histogram [582, 552, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:57:24,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 08:57:25,099 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 [2022-03-20 08:57:25,099 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:57:25,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:57:25,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1533344021, now seen corresponding path program 11 times [2022-03-20 08:57:25,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:57:25,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986853859] [2022-03-20 08:57:25,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:57:25,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:57:26,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:58:51,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:58:51,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:58:51,608 INFO L134 CoverageAnalysis]: Checked inductivity of 338725 backedges. 32627 proven. 305256 refuted. 0 times theorem prover too weak. 842 trivial. 0 not checked. [2022-03-20 08:58:51,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:58:51,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986853859] [2022-03-20 08:58:51,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986853859] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:58:51,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124504574] [2022-03-20 08:58:51,609 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 08:58:51,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:58:51,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:58:51,619 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) [2022-03-20 08:58:51,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 08:58:54,248 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 583 check-sat command(s) [2022-03-20 08:58:54,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:58:54,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 2454 conjuncts, 554 conjunts are in the unsatisfiable core [2022-03-20 08:58:54,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:58:56,277 INFO L134 CoverageAnalysis]: Checked inductivity of 338725 backedges. 32627 proven. 305256 refuted. 0 times theorem prover too weak. 842 trivial. 0 not checked. [2022-03-20 08:58:56,277 INFO L328 TraceCheckSpWp]: Computing backward predicates...