/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_14.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 21:18:10,181 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 21:18:10,192 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 21:18:10,239 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-23 21:18:10,256 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 21:18:10,257 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 21:18:10,258 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 21:18:10,260 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 21:18:10,261 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 21:18:10,261 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 21:18:10,267 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 21:18:10,273 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 21:18:10,274 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 21:18:10,275 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 21:18:10,276 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 21:18:10,277 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 21:18:10,282 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-23 21:18:10,287 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 21:18:10,287 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 21:18:10,288 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 21:18:10,290 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-02-23 21:18:10,312 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 21:18:10,313 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 21:18:10,314 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-23 21:18:10,314 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-23 21:18:10,314 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-23 21:18:10,314 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-23 21:18:10,315 INFO L138 SettingsManager]: * Use SBE=true [2022-02-23 21:18:10,315 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 21:18:10,315 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 21:18:10,315 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 21:18:10,316 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 21:18:10,316 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 21:18:10,316 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 21:18:10,316 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 21:18:10,316 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 21:18:10,316 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 21:18:10,316 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 21:18:10,316 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 21:18:10,316 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 21:18:10,316 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 21:18:10,316 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 21:18:10,317 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-23 21:18:10,317 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-23 21:18:10,317 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 21:18:10,317 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-23 21:18:10,317 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-23 21:18:10,317 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-02-23 21:18:10,317 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-02-23 21:18:10,318 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 21:18:10,318 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 21:18:10,521 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 21:18:10,555 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 21:18:10,556 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 21:18:10,557 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 21:18:10,558 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 21:18:10,558 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_14.c [2022-02-23 21:18:10,620 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8477c94d0/23f63496d0a7412e9759dfbdb5be076a/FLAGcf6dcf68f [2022-02-23 21:18:10,964 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 21:18:10,964 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_14.c [2022-02-23 21:18:10,968 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8477c94d0/23f63496d0a7412e9759dfbdb5be076a/FLAGcf6dcf68f [2022-02-23 21:18:11,401 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8477c94d0/23f63496d0a7412e9759dfbdb5be076a [2022-02-23 21:18:11,402 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 21:18:11,403 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 21:18:11,406 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 21:18:11,406 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 21:18:11,408 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 21:18:11,408 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 09:18:11" (1/1) ... [2022-02-23 21:18:11,409 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2336cda4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 09:18:11, skipping insertion in model container [2022-02-23 21:18:11,409 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 09:18:11" (1/1) ... [2022-02-23 21:18:11,421 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 21:18:11,429 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 21:18:11,528 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_14.c[319,332] [2022-02-23 21:18:11,558 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 21:18:11,563 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 21:18:11,572 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_14.c[319,332] [2022-02-23 21:18:11,576 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 21:18:11,589 INFO L208 MainTranslator]: Completed translation [2022-02-23 21:18:11,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 09:18:11 WrapperNode [2022-02-23 21:18:11,590 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 21:18:11,592 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 21:18:11,592 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 21:18:11,592 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 21:18:11,601 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 09:18:11" (1/1) ... [2022-02-23 21:18:11,602 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 09:18:11" (1/1) ... [2022-02-23 21:18:11,616 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 09:18:11" (1/1) ... [2022-02-23 21:18:11,616 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 09:18:11" (1/1) ... [2022-02-23 21:18:11,619 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 09:18:11" (1/1) ... [2022-02-23 21:18:11,621 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 09:18:11" (1/1) ... [2022-02-23 21:18:11,622 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 09:18:11" (1/1) ... [2022-02-23 21:18:11,623 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 21:18:11,623 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 21:18:11,623 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 21:18:11,623 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 21:18:11,624 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 09:18:11" (1/1) ... [2022-02-23 21:18:11,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 21:18:11,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 21:18:11,653 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-23 21:18:11,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-23 21:18:11,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 21:18:11,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 21:18:11,693 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 21:18:11,693 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 21:18:11,693 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 21:18:11,693 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 21:18:11,693 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 21:18:11,693 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 21:18:11,693 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 21:18:11,693 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 21:18:11,693 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 21:18:11,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 21:18:11,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 21:18:11,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 21:18:11,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 21:18:11,694 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 21:18:11,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 21:18:11,733 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 21:18:11,734 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 21:18:11,813 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 21:18:11,817 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 21:18:11,817 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-23 21:18:11,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 09:18:11 BoogieIcfgContainer [2022-02-23 21:18:11,818 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 21:18:11,819 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 21:18:11,819 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 21:18:11,820 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 21:18:11,822 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 09:18:11" (1/1) ... [2022-02-23 21:18:30,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 09:18:30 BasicIcfg [2022-02-23 21:18:30,237 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 21:18:30,238 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 21:18:30,238 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 21:18:30,240 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 21:18:30,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 09:18:11" (1/4) ... [2022-02-23 21:18:30,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74481f7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 09:18:30, skipping insertion in model container [2022-02-23 21:18:30,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 09:18:11" (2/4) ... [2022-02-23 21:18:30,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74481f7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 09:18:30, skipping insertion in model container [2022-02-23 21:18:30,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 09:18:11" (3/4) ... [2022-02-23 21:18:30,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74481f7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 09:18:30, skipping insertion in model container [2022-02-23 21:18:30,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 09:18:30" (4/4) ... [2022-02-23 21:18:30,242 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_14.cqvasr [2022-02-23 21:18:30,246 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-23 21:18:30,246 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 21:18:30,276 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 21:18:30,280 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-02-23 21:18:30,280 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 21:18:30,290 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-23 21:18:30,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-23 21:18:30,293 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 21:18:30,294 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 21:18:30,294 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 21:18:30,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 21:18:30,298 INFO L85 PathProgramCache]: Analyzing trace with hash -412568735, now seen corresponding path program 1 times [2022-02-23 21:18:30,303 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 21:18:30,303 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585850923] [2022-02-23 21:18:30,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:18:30,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 21:18:30,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:18:30,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 21:18:30,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:18:30,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 21:18:30,390 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 21:18:30,390 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585850923] [2022-02-23 21:18:30,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585850923] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 21:18:30,391 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 21:18:30,391 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 21:18:30,392 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137213506] [2022-02-23 21:18:30,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 21:18:30,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 21:18:30,395 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 21:18:30,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 21:18:30,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 21:18:30,414 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) 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) [2022-02-23 21:18:30,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 21:18:30,463 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2022-02-23 21:18:30,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 21:18:30,465 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 [2022-02-23 21:18:30,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 21:18:30,469 INFO L225 Difference]: With dead ends: 36 [2022-02-23 21:18:30,470 INFO L226 Difference]: Without dead ends: 17 [2022-02-23 21:18:30,472 INFO L932 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 [2022-02-23 21:18:30,474 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 14 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 21:18:30,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 25 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 21:18:30,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-02-23 21:18:30,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-02-23 21:18:30,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 21:18:30,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-02-23 21:18:30,496 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 12 [2022-02-23 21:18:30,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 21:18:30,497 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-02-23 21:18:30,497 INFO L471 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) [2022-02-23 21:18:30,497 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-02-23 21:18:30,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-23 21:18:30,497 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 21:18:30,497 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 21:18:30,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 21:18:30,498 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 21:18:30,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 21:18:30,498 INFO L85 PathProgramCache]: Analyzing trace with hash -383016063, now seen corresponding path program 1 times [2022-02-23 21:18:30,499 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 21:18:30,499 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988058569] [2022-02-23 21:18:30,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:18:30,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 21:18:30,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:18:30,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 21:18:30,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:18:30,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 21:18:30,534 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 21:18:30,534 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988058569] [2022-02-23 21:18:30,534 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988058569] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 21:18:30,535 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 21:18:30,535 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 21:18:30,535 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141515290] [2022-02-23 21:18:30,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 21:18:30,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 21:18:30,536 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 21:18:30,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 21:18:30,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 21:18:30,537 INFO L87 Difference]: Start difference. First operand 17 states and 20 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) [2022-02-23 21:18:30,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 21:18:30,574 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2022-02-23 21:18:30,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 21:18:30,575 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 [2022-02-23 21:18:30,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 21:18:30,576 INFO L225 Difference]: With dead ends: 30 [2022-02-23 21:18:30,576 INFO L226 Difference]: Without dead ends: 19 [2022-02-23 21:18:30,576 INFO L932 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 [2022-02-23 21:18:30,577 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 14 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 21:18:30,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 23 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 21:18:30,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-02-23 21:18:30,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-02-23 21:18:30,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 21:18:30,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-02-23 21:18:30,581 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 12 [2022-02-23 21:18:30,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 21:18:30,581 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-02-23 21:18:30,581 INFO L471 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) [2022-02-23 21:18:30,582 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-02-23 21:18:30,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-23 21:18:30,582 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 21:18:30,582 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 21:18:30,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-23 21:18:30,582 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 21:18:30,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 21:18:30,583 INFO L85 PathProgramCache]: Analyzing trace with hash 305534661, now seen corresponding path program 1 times [2022-02-23 21:18:30,583 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 21:18:30,583 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842071645] [2022-02-23 21:18:30,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:18:30,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 21:18:30,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:18:30,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 21:18:30,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:18:30,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-23 21:18:30,646 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 21:18:30,646 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842071645] [2022-02-23 21:18:30,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842071645] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 21:18:30,647 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 21:18:30,647 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 21:18:30,647 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263905851] [2022-02-23 21:18:30,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 21:18:30,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 21:18:30,647 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 21:18:30,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 21:18:30,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 21:18:30,648 INFO L87 Difference]: Start difference. First operand 19 states and 22 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) [2022-02-23 21:18:30,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 21:18:30,682 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2022-02-23 21:18:30,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 21:18:30,683 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 [2022-02-23 21:18:30,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 21:18:30,683 INFO L225 Difference]: With dead ends: 28 [2022-02-23 21:18:30,683 INFO L226 Difference]: Without dead ends: 20 [2022-02-23 21:18:30,684 INFO L932 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 [2022-02-23 21:18:30,684 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 11 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 21:18:30,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 24 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 21:18:30,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-02-23 21:18:30,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-02-23 21:18:30,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 21:18:30,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-02-23 21:18:30,688 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2022-02-23 21:18:30,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 21:18:30,688 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-02-23 21:18:30,689 INFO L471 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) [2022-02-23 21:18:30,689 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-02-23 21:18:30,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-23 21:18:30,689 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 21:18:30,689 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 21:18:30,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-23 21:18:30,689 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 21:18:30,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 21:18:30,690 INFO L85 PathProgramCache]: Analyzing trace with hash 906513450, now seen corresponding path program 1 times [2022-02-23 21:18:30,690 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 21:18:30,690 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561144714] [2022-02-23 21:18:30,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:18:30,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 21:18:30,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:18:30,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 21:18:30,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:18:30,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-23 21:18:30,745 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 21:18:30,745 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561144714] [2022-02-23 21:18:30,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561144714] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 21:18:30,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41671648] [2022-02-23 21:18:30,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:18:30,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:18:30,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 21:18:30,748 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 21:18:30,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 21:18:30,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:18:30,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2022-02-23 21:18:30,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 21:18:30,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-23 21:18:30,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 21:18:30,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-23 21:18:30,909 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41671648] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 21:18:30,909 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 21:18:30,909 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-02-23 21:18:30,909 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306399236] [2022-02-23 21:18:30,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 21:18:30,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-23 21:18:30,909 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 21:18:30,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-23 21:18:30,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-02-23 21:18:30,910 INFO L87 Difference]: Start difference. First operand 20 states and 23 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) [2022-02-23 21:18:30,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 21:18:30,981 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2022-02-23 21:18:30,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-23 21:18:30,981 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 [2022-02-23 21:18:30,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 21:18:30,992 INFO L225 Difference]: With dead ends: 37 [2022-02-23 21:18:30,992 INFO L226 Difference]: Without dead ends: 25 [2022-02-23 21:18:30,992 INFO L932 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 [2022-02-23 21:18:30,993 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 18 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 21:18:30,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 27 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 21:18:30,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-02-23 21:18:30,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-02-23 21:18:30,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 19 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 21:18:30,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-02-23 21:18:30,997 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 15 [2022-02-23 21:18:30,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 21:18:30,997 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-02-23 21:18:30,998 INFO L471 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) [2022-02-23 21:18:30,998 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-02-23 21:18:30,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-23 21:18:30,998 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 21:18:30,998 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 21:18:31,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-23 21:18:31,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:18:31,211 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 21:18:31,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 21:18:31,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1586204636, now seen corresponding path program 1 times [2022-02-23 21:18:31,212 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 21:18:31,212 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537312598] [2022-02-23 21:18:31,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:18:31,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 21:18:31,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:18:31,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 21:18:31,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:18:31,280 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-23 21:18:31,280 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 21:18:31,282 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537312598] [2022-02-23 21:18:31,282 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537312598] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 21:18:31,282 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247114391] [2022-02-23 21:18:31,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:18:31,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:18:31,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 21:18:31,301 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 21:18:31,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 21:18:31,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:18:31,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-23 21:18:31,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 21:18:31,393 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-23 21:18:31,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 21:18:31,444 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-23 21:18:31,444 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247114391] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 21:18:31,445 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 21:18:31,445 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-02-23 21:18:31,445 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343849866] [2022-02-23 21:18:31,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 21:18:31,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-23 21:18:31,445 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 21:18:31,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-23 21:18:31,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-02-23 21:18:31,446 INFO L87 Difference]: Start difference. First operand 25 states and 29 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) [2022-02-23 21:18:31,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 21:18:31,573 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2022-02-23 21:18:31,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 21:18:31,573 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 [2022-02-23 21:18:31,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 21:18:31,574 INFO L225 Difference]: With dead ends: 48 [2022-02-23 21:18:31,574 INFO L226 Difference]: Without dead ends: 33 [2022-02-23 21:18:31,574 INFO L932 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 [2022-02-23 21:18:31,575 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 18 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 21:18:31,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 38 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 21:18:31,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-02-23 21:18:31,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-02-23 21:18:31,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 27 states have internal predecessors, (31), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 21:18:31,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-02-23 21:18:31,580 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 21 [2022-02-23 21:18:31,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 21:18:31,580 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-02-23 21:18:31,580 INFO L471 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) [2022-02-23 21:18:31,580 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-02-23 21:18:31,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-23 21:18:31,580 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 21:18:31,581 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 21:18:31,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-23 21:18:31,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:18:31,797 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 21:18:31,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 21:18:31,797 INFO L85 PathProgramCache]: Analyzing trace with hash -233424180, now seen corresponding path program 2 times [2022-02-23 21:18:31,797 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 21:18:31,797 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68601324] [2022-02-23 21:18:31,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:18:31,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 21:18:31,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:18:31,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 21:18:31,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:18:31,897 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-23 21:18:31,897 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 21:18:31,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68601324] [2022-02-23 21:18:31,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68601324] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 21:18:31,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870396919] [2022-02-23 21:18:31,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 21:18:31,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:18:31,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 21:18:31,908 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) [2022-02-23 21:18:31,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-23 21:18:31,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 21:18:31,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 21:18:31,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-23 21:18:31,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 21:18:32,010 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-23 21:18:32,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 21:18:32,122 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-23 21:18:32,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870396919] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 21:18:32,123 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 21:18:32,123 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-02-23 21:18:32,123 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610496876] [2022-02-23 21:18:32,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 21:18:32,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-23 21:18:32,124 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 21:18:32,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-23 21:18:32,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-02-23 21:18:32,124 INFO L87 Difference]: Start difference. First operand 33 states and 37 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) [2022-02-23 21:18:32,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 21:18:32,314 INFO L93 Difference]: Finished difference Result 64 states and 80 transitions. [2022-02-23 21:18:32,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-23 21:18:32,314 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 [2022-02-23 21:18:32,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 21:18:32,315 INFO L225 Difference]: With dead ends: 64 [2022-02-23 21:18:32,315 INFO L226 Difference]: Without dead ends: 49 [2022-02-23 21:18:32,316 INFO L932 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 [2022-02-23 21:18:32,316 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 26 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 21:18:32,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 38 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 21:18:32,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-02-23 21:18:32,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-02-23 21:18:32,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 42 states have (on average 1.119047619047619) internal successors, (47), 43 states have internal predecessors, (47), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 21:18:32,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2022-02-23 21:18:32,321 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 29 [2022-02-23 21:18:32,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 21:18:32,322 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2022-02-23 21:18:32,322 INFO L471 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) [2022-02-23 21:18:32,322 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2022-02-23 21:18:32,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-02-23 21:18:32,323 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 21:18:32,323 INFO L514 BasicCegarLoop]: trace histogram [16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 21:18:32,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-23 21:18:32,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:18:32,540 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 21:18:32,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 21:18:32,540 INFO L85 PathProgramCache]: Analyzing trace with hash 2041954476, now seen corresponding path program 3 times [2022-02-23 21:18:32,540 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 21:18:32,540 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571189216] [2022-02-23 21:18:32,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:18:32,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 21:18:32,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:18:32,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 21:18:32,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:18:32,720 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-23 21:18:32,721 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 21:18:32,721 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571189216] [2022-02-23 21:18:32,721 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571189216] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 21:18:32,721 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092518039] [2022-02-23 21:18:32,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 21:18:32,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:18:32,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 21:18:32,722 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) [2022-02-23 21:18:32,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-23 21:18:32,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-02-23 21:18:32,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 21:18:32,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-23 21:18:32,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 21:18:32,837 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 70 proven. 4 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-02-23 21:18:32,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 21:18:32,941 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 70 proven. 4 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-02-23 21:18:32,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092518039] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 21:18:32,942 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 21:18:32,942 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 5, 5] total 24 [2022-02-23 21:18:32,942 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805642797] [2022-02-23 21:18:32,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 21:18:32,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-23 21:18:32,942 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 21:18:32,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-23 21:18:32,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-02-23 21:18:32,943 INFO L87 Difference]: Start difference. First operand 49 states and 53 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) [2022-02-23 21:18:33,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 21:18:33,260 INFO L93 Difference]: Finished difference Result 74 states and 91 transitions. [2022-02-23 21:18:33,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-23 21:18:33,261 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 [2022-02-23 21:18:33,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 21:18:33,262 INFO L225 Difference]: With dead ends: 74 [2022-02-23 21:18:33,262 INFO L226 Difference]: Without dead ends: 59 [2022-02-23 21:18:33,263 INFO L932 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 [2022-02-23 21:18:33,263 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 52 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 21:18:33,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 27 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 21:18:33,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-02-23 21:18:33,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-02-23 21:18:33,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 53 states have internal predecessors, (61), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 21:18:33,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2022-02-23 21:18:33,269 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 45 [2022-02-23 21:18:33,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 21:18:33,270 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2022-02-23 21:18:33,270 INFO L471 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) [2022-02-23 21:18:33,270 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2022-02-23 21:18:33,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-23 21:18:33,270 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 21:18:33,271 INFO L514 BasicCegarLoop]: trace histogram [21, 15, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 21:18:33,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-23 21:18:33,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:18:33,489 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 21:18:33,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 21:18:33,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1756179500, now seen corresponding path program 4 times [2022-02-23 21:18:33,490 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 21:18:33,490 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544393959] [2022-02-23 21:18:33,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:18:33,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 21:18:33,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:18:33,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 21:18:33,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:18:33,639 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-02-23 21:18:33,640 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 21:18:33,640 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544393959] [2022-02-23 21:18:33,640 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544393959] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 21:18:33,640 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220483599] [2022-02-23 21:18:33,640 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-23 21:18:33,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:18:33,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 21:18:33,641 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) [2022-02-23 21:18:33,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-23 21:18:33,676 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-23 21:18:33,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 21:18:33,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-23 21:18:33,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 21:18:33,764 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-02-23 21:18:33,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 21:18:34,124 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-02-23 21:18:34,124 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220483599] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 21:18:34,124 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 21:18:34,124 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-02-23 21:18:34,124 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939607976] [2022-02-23 21:18:34,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 21:18:34,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-23 21:18:34,125 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 21:18:34,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-23 21:18:34,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-02-23 21:18:34,126 INFO L87 Difference]: Start difference. First operand 59 states and 67 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) [2022-02-23 21:18:34,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 21:18:34,661 INFO L93 Difference]: Finished difference Result 116 states and 149 transitions. [2022-02-23 21:18:34,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-23 21:18:34,662 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 [2022-02-23 21:18:34,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 21:18:34,662 INFO L225 Difference]: With dead ends: 116 [2022-02-23 21:18:34,662 INFO L226 Difference]: Without dead ends: 93 [2022-02-23 21:18:34,664 INFO L932 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 [2022-02-23 21:18:34,665 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 44 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 21:18:34,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 43 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 21:18:34,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-02-23 21:18:34,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-02-23 21:18:34,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 86 states have (on average 1.1046511627906976) internal successors, (95), 87 states have internal predecessors, (95), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 21:18:34,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 101 transitions. [2022-02-23 21:18:34,672 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 101 transitions. Word has length 55 [2022-02-23 21:18:34,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 21:18:34,672 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 101 transitions. [2022-02-23 21:18:34,672 INFO L471 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) [2022-02-23 21:18:34,672 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 101 transitions. [2022-02-23 21:18:34,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-23 21:18:34,674 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 21:18:34,674 INFO L514 BasicCegarLoop]: trace histogram [38, 32, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 21:18:34,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-23 21:18:34,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:18:34,894 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 21:18:34,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 21:18:34,894 INFO L85 PathProgramCache]: Analyzing trace with hash 666806736, now seen corresponding path program 5 times [2022-02-23 21:18:34,894 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 21:18:34,894 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974351633] [2022-02-23 21:18:34,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:18:34,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 21:18:34,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:18:35,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 21:18:35,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:18:35,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-02-23 21:18:35,330 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 21:18:35,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974351633] [2022-02-23 21:18:35,330 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974351633] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 21:18:35,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885760628] [2022-02-23 21:18:35,330 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-23 21:18:35,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:18:35,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 21:18:35,332 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) [2022-02-23 21:18:35,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-23 21:18:35,400 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 39 check-sat command(s) [2022-02-23 21:18:35,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 21:18:35,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-23 21:18:35,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 21:18:35,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-02-23 21:18:35,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 21:18:36,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-02-23 21:18:36,686 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885760628] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 21:18:36,686 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 21:18:36,686 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2022-02-23 21:18:36,686 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524424586] [2022-02-23 21:18:36,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 21:18:36,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-02-23 21:18:36,687 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 21:18:36,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-02-23 21:18:36,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-02-23 21:18:36,689 INFO L87 Difference]: Start difference. First operand 93 states and 101 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) [2022-02-23 21:18:38,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 21:18:38,343 INFO L93 Difference]: Finished difference Result 184 states and 234 transitions. [2022-02-23 21:18:38,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-23 21:18:38,343 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 [2022-02-23 21:18:38,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 21:18:38,344 INFO L225 Difference]: With dead ends: 184 [2022-02-23 21:18:38,344 INFO L226 Difference]: Without dead ends: 161 [2022-02-23 21:18:38,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2865 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6903, Invalid=11457, Unknown=0, NotChecked=0, Total=18360 [2022-02-23 21:18:38,352 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 78 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 21:18:38,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 33 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 21:18:38,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-02-23 21:18:38,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2022-02-23 21:18:38,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 154 states have (on average 1.0584415584415585) internal successors, (163), 155 states have internal predecessors, (163), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 21:18:38,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 169 transitions. [2022-02-23 21:18:38,368 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 169 transitions. Word has length 89 [2022-02-23 21:18:38,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 21:18:38,370 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 169 transitions. [2022-02-23 21:18:38,370 INFO L471 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) [2022-02-23 21:18:38,370 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 169 transitions. [2022-02-23 21:18:38,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-02-23 21:18:38,376 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 21:18:38,377 INFO L514 BasicCegarLoop]: trace histogram [72, 66, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 21:18:38,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-23 21:18:38,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:18:38,578 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 21:18:38,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 21:18:38,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1710004424, now seen corresponding path program 6 times [2022-02-23 21:18:38,579 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 21:18:38,579 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594511374] [2022-02-23 21:18:38,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:18:38,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 21:18:38,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:18:39,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 21:18:39,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:18:39,725 INFO L134 CoverageAnalysis]: Checked inductivity of 5185 backedges. 737 proven. 4422 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-02-23 21:18:39,726 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 21:18:39,726 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594511374] [2022-02-23 21:18:39,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594511374] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 21:18:39,726 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944049265] [2022-02-23 21:18:39,726 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-23 21:18:39,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:18:39,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 21:18:39,727 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) [2022-02-23 21:18:39,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-23 21:18:39,795 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2022-02-23 21:18:39,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 21:18:39,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-23 21:18:39,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 21:18:40,219 INFO L134 CoverageAnalysis]: Checked inductivity of 5185 backedges. 858 proven. 36 refuted. 0 times theorem prover too weak. 4291 trivial. 0 not checked. [2022-02-23 21:18:40,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 21:18:40,577 INFO L134 CoverageAnalysis]: Checked inductivity of 5185 backedges. 858 proven. 36 refuted. 0 times theorem prover too weak. 4291 trivial. 0 not checked. [2022-02-23 21:18:40,577 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944049265] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 21:18:40,577 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 21:18:40,578 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 9, 9] total 84 [2022-02-23 21:18:40,578 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953201196] [2022-02-23 21:18:40,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 21:18:40,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-02-23 21:18:40,578 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 21:18:40,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-02-23 21:18:40,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-02-23 21:18:40,581 INFO L87 Difference]: Start difference. First operand 161 states and 169 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) [2022-02-23 21:18:43,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 21:18:43,035 INFO L93 Difference]: Finished difference Result 202 states and 235 transitions. [2022-02-23 21:18:43,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-02-23 21:18:43,035 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 [2022-02-23 21:18:43,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 21:18:43,036 INFO L225 Difference]: With dead ends: 202 [2022-02-23 21:18:43,036 INFO L226 Difference]: Without dead ends: 179 [2022-02-23 21:18:43,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3321 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=10209, Invalid=16851, Unknown=0, NotChecked=0, Total=27060 [2022-02-23 21:18:43,042 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 172 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 517 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 517 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-23 21:18:43,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 42 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [517 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-23 21:18:43,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-02-23 21:18:43,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2022-02-23 21:18:43,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 172 states have (on average 1.0988372093023255) internal successors, (189), 173 states have internal predecessors, (189), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 21:18:43,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 195 transitions. [2022-02-23 21:18:43,052 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 195 transitions. Word has length 157 [2022-02-23 21:18:43,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 21:18:43,052 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 195 transitions. [2022-02-23 21:18:43,053 INFO L471 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) [2022-02-23 21:18:43,053 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 195 transitions. [2022-02-23 21:18:43,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-02-23 21:18:43,054 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 21:18:43,054 INFO L514 BasicCegarLoop]: trace histogram [81, 67, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 21:18:43,073 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-02-23 21:18:43,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:18:43,258 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 21:18:43,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 21:18:43,258 INFO L85 PathProgramCache]: Analyzing trace with hash -682717732, now seen corresponding path program 7 times [2022-02-23 21:18:43,258 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 21:18:43,258 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409262484] [2022-02-23 21:18:43,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:18:43,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 21:18:43,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:18:44,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 21:18:44,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:18:44,699 INFO L134 CoverageAnalysis]: Checked inductivity of 6562 backedges. 1836 proven. 4556 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-02-23 21:18:44,700 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 21:18:44,700 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409262484] [2022-02-23 21:18:44,700 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409262484] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 21:18:44,700 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990331932] [2022-02-23 21:18:44,700 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-23 21:18:44,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:18:44,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 21:18:44,701 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) [2022-02-23 21:18:44,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-23 21:18:44,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:18:44,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 69 conjunts are in the unsatisfiable core [2022-02-23 21:18:44,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 21:18:45,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6562 backedges. 1836 proven. 4556 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-02-23 21:18:45,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 21:18:48,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6562 backedges. 1836 proven. 4556 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-02-23 21:18:48,271 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990331932] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 21:18:48,271 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 21:18:48,271 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70, 70] total 140 [2022-02-23 21:18:48,271 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795451088] [2022-02-23 21:18:48,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 21:18:48,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-02-23 21:18:48,272 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 21:18:48,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-02-23 21:18:48,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2022-02-23 21:18:48,276 INFO L87 Difference]: Start difference. First operand 179 states and 195 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) [2022-02-23 21:18:52,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 21:18:52,643 INFO L93 Difference]: Finished difference Result 356 states and 457 transitions. [2022-02-23 21:18:52,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-02-23 21:18:52,643 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 [2022-02-23 21:18:52,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 21:18:52,645 INFO L225 Difference]: With dead ends: 356 [2022-02-23 21:18:52,645 INFO L226 Difference]: Without dead ends: 317 [2022-02-23 21:18:52,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 557 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11860 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=28498, Invalid=47402, Unknown=0, NotChecked=0, Total=75900 [2022-02-23 21:18:52,653 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 148 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-23 21:18:52,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 53 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-23 21:18:52,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-02-23 21:18:52,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 317. [2022-02-23 21:18:52,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 310 states have (on average 1.0548387096774194) internal successors, (327), 311 states have internal predecessors, (327), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 21:18:52,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 333 transitions. [2022-02-23 21:18:52,684 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 333 transitions. Word has length 175 [2022-02-23 21:18:52,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 21:18:52,684 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 333 transitions. [2022-02-23 21:18:52,684 INFO L471 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) [2022-02-23 21:18:52,685 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 333 transitions. [2022-02-23 21:18:52,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2022-02-23 21:18:52,697 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 21:18:52,697 INFO L514 BasicCegarLoop]: trace histogram [150, 136, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 21:18:52,715 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-02-23 21:18:52,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-02-23 21:18:52,916 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 21:18:52,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 21:18:52,917 INFO L85 PathProgramCache]: Analyzing trace with hash -935852536, now seen corresponding path program 8 times [2022-02-23 21:18:52,917 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 21:18:52,917 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328914337] [2022-02-23 21:18:52,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:18:52,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 21:18:52,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:18:58,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 21:18:58,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:18:58,091 INFO L134 CoverageAnalysis]: Checked inductivity of 22501 backedges. 3699 proven. 18632 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-02-23 21:18:58,091 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 21:18:58,092 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328914337] [2022-02-23 21:18:58,092 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328914337] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 21:18:58,092 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111140755] [2022-02-23 21:18:58,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 21:18:58,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:18:58,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 21:18:58,093 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) [2022-02-23 21:18:58,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-23 21:18:58,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 21:18:58,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 21:18:58,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 138 conjunts are in the unsatisfiable core [2022-02-23 21:18:58,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 21:18:58,624 INFO L134 CoverageAnalysis]: Checked inductivity of 22501 backedges. 3699 proven. 18632 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-02-23 21:18:58,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 21:19:09,965 INFO L134 CoverageAnalysis]: Checked inductivity of 22501 backedges. 3699 proven. 18632 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-02-23 21:19:09,965 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111140755] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 21:19:09,966 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 21:19:09,966 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [140, 139, 139] total 278 [2022-02-23 21:19:09,966 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435043198] [2022-02-23 21:19:09,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 21:19:09,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 278 states [2022-02-23 21:19:09,980 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 21:19:09,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 278 interpolants. [2022-02-23 21:19:09,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38228, Invalid=38778, Unknown=0, NotChecked=0, Total=77006 [2022-02-23 21:19:09,997 INFO L87 Difference]: Start difference. First operand 317 states and 333 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) [2022-02-23 21:19:26,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 21:19:26,461 INFO L93 Difference]: Finished difference Result 632 states and 802 transitions. [2022-02-23 21:19:26,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 277 states. [2022-02-23 21:19:26,462 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 [2022-02-23 21:19:26,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 21:19:26,479 INFO L225 Difference]: With dead ends: 632 [2022-02-23 21:19:26,479 INFO L226 Difference]: Without dead ends: 593 [2022-02-23 21:19:26,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1040 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 550 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47533 ImplicationChecksByTransitivity, 30.9s TimeCoverageRelationStatistics Valid=114127, Invalid=190025, Unknown=0, NotChecked=0, Total=304152 [2022-02-23 21:19:26,493 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 286 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 419 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 419 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-23 21:19:26,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 48 Invalid, 1044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [419 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-23 21:19:26,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2022-02-23 21:19:26,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 593. [2022-02-23 21:19:26,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 586 states have (on average 1.02901023890785) internal successors, (603), 587 states have internal predecessors, (603), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 21:19:26,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 609 transitions. [2022-02-23 21:19:26,509 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 609 transitions. Word has length 313 [2022-02-23 21:19:26,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 21:19:26,509 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 609 transitions. [2022-02-23 21:19:26,510 INFO L471 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) [2022-02-23 21:19:26,510 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 609 transitions. [2022-02-23 21:19:26,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 590 [2022-02-23 21:19:26,516 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 21:19:26,517 INFO L514 BasicCegarLoop]: trace histogram [288, 274, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 21:19:26,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-23 21:19:26,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:19:26,740 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 21:19:26,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 21:19:26,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1310351008, now seen corresponding path program 9 times [2022-02-23 21:19:26,741 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 21:19:26,741 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206525359] [2022-02-23 21:19:26,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:19:26,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 21:19:26,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:19:42,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 21:19:42,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:19:42,329 INFO L134 CoverageAnalysis]: Checked inductivity of 82945 backedges. 7425 proven. 75350 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-02-23 21:19:42,330 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 21:19:42,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206525359] [2022-02-23 21:19:42,330 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206525359] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 21:19:42,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244628667] [2022-02-23 21:19:42,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 21:19:42,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:19:42,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 21:19:42,336 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) [2022-02-23 21:19:42,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-23 21:19:42,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2022-02-23 21:19:42,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 21:19:42,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-23 21:19:42,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 21:19:44,470 INFO L134 CoverageAnalysis]: Checked inductivity of 82945 backedges. 7946 proven. 196 refuted. 0 times theorem prover too weak. 74803 trivial. 0 not checked. [2022-02-23 21:19:44,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 21:19:47,085 INFO L134 CoverageAnalysis]: Checked inductivity of 82945 backedges. 7946 proven. 196 refuted. 0 times theorem prover too weak. 74803 trivial. 0 not checked. [2022-02-23 21:19:47,085 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244628667] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 21:19:47,085 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 21:19:47,085 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [278, 17, 17] total 308 [2022-02-23 21:19:47,086 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369720398] [2022-02-23 21:19:47,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 21:19:47,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 308 states [2022-02-23 21:19:47,088 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 21:19:47,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 308 interpolants. [2022-02-23 21:19:47,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46973, Invalid=47583, Unknown=0, NotChecked=0, Total=94556 [2022-02-23 21:19:47,098 INFO L87 Difference]: Start difference. First operand 593 states and 609 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) [2022-02-23 21:20:09,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 21:20:09,802 INFO L93 Difference]: Finished difference Result 666 states and 731 transitions. [2022-02-23 21:20:09,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 308 states. [2022-02-23 21:20:09,802 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 [2022-02-23 21:20:09,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 21:20:09,819 INFO L225 Difference]: With dead ends: 666 [2022-02-23 21:20:09,820 INFO L226 Difference]: Without dead ends: 627 [2022-02-23 21:20:09,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1790 GetRequests, 1179 SyntacticMatches, 0 SemanticMatches, 611 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46725 ImplicationChecksByTransitivity, 38.1s TimeCoverageRelationStatistics Valid=140913, Invalid=234243, Unknown=0, NotChecked=0, Total=375156 [2022-02-23 21:20:09,832 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 910 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 665 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 911 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 1364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 665 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-23 21:20:09,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [911 Valid, 52 Invalid, 1364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [665 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-23 21:20:09,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2022-02-23 21:20:09,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 627. [2022-02-23 21:20:09,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 620 states have (on average 1.053225806451613) internal successors, (653), 621 states have internal predecessors, (653), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 21:20:09,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 659 transitions. [2022-02-23 21:20:09,849 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 659 transitions. Word has length 589 [2022-02-23 21:20:09,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 21:20:09,849 INFO L470 AbstractCegarLoop]: Abstraction has 627 states and 659 transitions. [2022-02-23 21:20:09,850 INFO L471 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) [2022-02-23 21:20:09,850 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 659 transitions. [2022-02-23 21:20:09,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 624 [2022-02-23 21:20:09,853 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 21:20:09,853 INFO L514 BasicCegarLoop]: trace histogram [305, 275, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 21:20:09,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-23 21:20:10,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-02-23 21:20:10,069 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 21:20:10,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 21:20:10,070 INFO L85 PathProgramCache]: Analyzing trace with hash 2114917964, now seen corresponding path program 10 times [2022-02-23 21:20:10,070 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 21:20:10,070 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180074548] [2022-02-23 21:20:10,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:20:10,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 21:20:10,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:20:24,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 21:20:24,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:20:24,944 INFO L134 CoverageAnalysis]: Checked inductivity of 93026 backedges. 16284 proven. 75900 refuted. 0 times theorem prover too weak. 842 trivial. 0 not checked. [2022-02-23 21:20:24,944 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 21:20:24,944 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180074548] [2022-02-23 21:20:24,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180074548] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 21:20:24,944 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62640562] [2022-02-23 21:20:24,944 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-23 21:20:24,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:20:24,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 21:20:24,946 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) [2022-02-23 21:20:24,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-23 21:20:25,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-23 21:20:25,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 21:20:25,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 1346 conjuncts, 277 conjunts are in the unsatisfiable core [2022-02-23 21:20:25,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 21:20:26,031 INFO L134 CoverageAnalysis]: Checked inductivity of 93026 backedges. 16284 proven. 75900 refuted. 0 times theorem prover too weak. 842 trivial. 0 not checked. [2022-02-23 21:20:26,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 21:21:08,863 INFO L134 CoverageAnalysis]: Checked inductivity of 93026 backedges. 16284 proven. 75900 refuted. 0 times theorem prover too weak. 842 trivial. 0 not checked. [2022-02-23 21:21:08,864 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62640562] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 21:21:08,864 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 21:21:08,864 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [279, 278, 278] total 556 [2022-02-23 21:21:08,864 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618511381] [2022-02-23 21:21:08,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 21:21:08,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 556 states [2022-02-23 21:21:08,881 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 21:21:08,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 556 interpolants. [2022-02-23 21:21:08,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153737, Invalid=154843, Unknown=0, NotChecked=0, Total=308580 [2022-02-23 21:21:08,910 INFO L87 Difference]: Start difference. First operand 627 states and 659 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) [2022-02-23 21:22:18,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 21:22:18,688 INFO L93 Difference]: Finished difference Result 1252 states and 1593 transitions. [2022-02-23 21:22:18,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 555 states. [2022-02-23 21:22:18,689 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 [2022-02-23 21:22:18,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 21:22:18,692 INFO L225 Difference]: With dead ends: 1252 [2022-02-23 21:22:18,692 INFO L226 Difference]: Without dead ends: 1181 [2022-02-23 21:22:18,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2077 GetRequests, 971 SyntacticMatches, 0 SemanticMatches, 1106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191676 ImplicationChecksByTransitivity, 118.9s TimeCoverageRelationStatistics Valid=460098, Invalid=766458, Unknown=0, NotChecked=0, Total=1226556 [2022-02-23 21:22:18,754 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 564 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1217 mSolverCounterSat, 836 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 2053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 836 IncrementalHoareTripleChecker+Valid, 1217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-23 21:22:18,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [565 Valid, 63 Invalid, 2053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [836 Valid, 1217 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-23 21:22:18,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2022-02-23 21:22:18,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 1181. [2022-02-23 21:22:18,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1181 states, 1174 states have (on average 1.0281090289608177) internal successors, (1207), 1175 states have internal predecessors, (1207), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 21:22:18,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1181 states to 1181 states and 1213 transitions. [2022-02-23 21:22:18,783 INFO L78 Accepts]: Start accepts. Automaton has 1181 states and 1213 transitions. Word has length 623 [2022-02-23 21:22:18,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 21:22:18,784 INFO L470 AbstractCegarLoop]: Abstraction has 1181 states and 1213 transitions. [2022-02-23 21:22:18,785 INFO L471 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) [2022-02-23 21:22:18,785 INFO L276 IsEmpty]: Start isEmpty. Operand 1181 states and 1213 transitions. [2022-02-23 21:22:18,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1178 [2022-02-23 21:22:18,794 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 21:22:18,794 INFO L514 BasicCegarLoop]: trace histogram [582, 552, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 21:22:18,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-23 21:22:19,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-02-23 21:22:19,011 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 21:22:19,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 21:22:19,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1552361272, now seen corresponding path program 11 times [2022-02-23 21:22:19,012 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 21:22:19,012 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400393969] [2022-02-23 21:22:19,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 21:22:19,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 21:22:19,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:23:24,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 21:23:24,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 21:23:24,580 INFO L134 CoverageAnalysis]: Checked inductivity of 338725 backedges. 32627 proven. 305256 refuted. 0 times theorem prover too weak. 842 trivial. 0 not checked. [2022-02-23 21:23:24,580 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 21:23:24,580 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400393969] [2022-02-23 21:23:24,580 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400393969] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 21:23:24,580 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598095176] [2022-02-23 21:23:24,580 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-23 21:23:24,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 21:23:24,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 21:23:24,582 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) [2022-02-23 21:23:24,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-23 21:23:26,577 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 583 check-sat command(s) [2022-02-23 21:23:26,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 21:23:26,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 2454 conjuncts, 554 conjunts are in the unsatisfiable core [2022-02-23 21:23:26,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 21:23:28,344 INFO L134 CoverageAnalysis]: Checked inductivity of 338725 backedges. 32627 proven. 305256 refuted. 0 times theorem prover too weak. 842 trivial. 0 not checked. [2022-02-23 21:23:28,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 21:26:36,810 INFO L134 CoverageAnalysis]: Checked inductivity of 338725 backedges. 32627 proven. 305256 refuted. 0 times theorem prover too weak. 842 trivial. 0 not checked. [2022-02-23 21:26:36,810 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598095176] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 21:26:36,810 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-23 21:26:36,811 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [556, 555, 555] total 1110 [2022-02-23 21:26:36,811 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497209024] [2022-02-23 21:26:36,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-23 21:26:36,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 1110 states [2022-02-23 21:26:36,814 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 21:26:36,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 1110 interpolants. [2022-02-23 21:26:36,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=614388, Invalid=616602, Unknown=0, NotChecked=0, Total=1230990 [2022-02-23 21:26:36,945 INFO L87 Difference]: Start difference. First operand 1181 states and 1213 transitions. Second operand has 1110 states, 1110 states have (on average 2.007207207207207) internal successors, (2228), 1109 states have internal predecessors, (2228), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)