/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/nested3-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 06:06:20,780 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 06:06:20,790 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 06:06:20,835 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-05 06:06:20,850 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 06:06:20,852 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 06:06:20,853 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 06:06:20,855 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 06:06:20,856 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 06:06:20,856 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 06:06:20,858 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 06:06:20,863 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 06:06:20,865 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 06:06:20,866 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 06:06:20,866 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 06:06:20,867 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 06:06:20,868 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 06:06:20,874 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-05 06:06:20,882 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 06:06:20,883 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 06:06:20,884 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 06:06:20,885 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-05 06:06:20,909 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 06:06:20,910 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 06:06:20,910 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-05 06:06:20,910 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-05 06:06:20,911 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-05 06:06:20,911 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-05 06:06:20,912 INFO L138 SettingsManager]: * Use SBE=true [2022-04-05 06:06:20,912 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 06:06:20,912 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 06:06:20,913 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 06:06:20,913 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 06:06:20,913 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 06:06:20,913 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 06:06:20,913 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 06:06:20,914 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 06:06:20,914 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 06:06:20,914 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 06:06:20,914 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 06:06:20,914 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 06:06:20,914 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 06:06:20,914 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 06:06:20,915 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-05 06:06:20,915 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-05 06:06:20,915 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 06:06:20,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-05 06:06:20,915 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-05 06:06:20,916 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-05 06:06:20,916 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-05 06:06:20,917 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 06:06:20,917 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 06:06:21,147 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 06:06:21,171 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 06:06:21,173 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 06:06:21,173 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 06:06:21,174 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 06:06:21,175 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested3-1.c [2022-04-05 06:06:21,230 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3ba74f9b/e8fe8752b1304494970a2c2e171c4974/FLAGaee42bad9 [2022-04-05 06:06:21,623 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 06:06:21,623 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested3-1.c [2022-04-05 06:06:21,629 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3ba74f9b/e8fe8752b1304494970a2c2e171c4974/FLAGaee42bad9 [2022-04-05 06:06:22,039 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3ba74f9b/e8fe8752b1304494970a2c2e171c4974 [2022-04-05 06:06:22,042 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 06:06:22,043 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 06:06:22,046 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 06:06:22,046 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 06:06:22,052 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 06:06:22,052 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 06:06:22" (1/1) ... [2022-04-05 06:06:22,053 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3aeb7af4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:06:22, skipping insertion in model container [2022-04-05 06:06:22,054 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 06:06:22" (1/1) ... [2022-04-05 06:06:22,060 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 06:06:22,071 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 06:06:22,194 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/nested3-1.c[321,334] [2022-04-05 06:06:22,236 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 06:06:22,243 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 06:06:22,256 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/nested3-1.c[321,334] [2022-04-05 06:06:22,264 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 06:06:22,275 INFO L208 MainTranslator]: Completed translation [2022-04-05 06:06:22,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:06:22 WrapperNode [2022-04-05 06:06:22,277 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 06:06:22,279 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 06:06:22,280 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 06:06:22,280 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 06:06:22,289 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:06:22" (1/1) ... [2022-04-05 06:06:22,289 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:06:22" (1/1) ... [2022-04-05 06:06:22,295 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:06:22" (1/1) ... [2022-04-05 06:06:22,295 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:06:22" (1/1) ... [2022-04-05 06:06:22,298 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:06:22" (1/1) ... [2022-04-05 06:06:22,301 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:06:22" (1/1) ... [2022-04-05 06:06:22,302 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:06:22" (1/1) ... [2022-04-05 06:06:22,303 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 06:06:22,304 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 06:06:22,304 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 06:06:22,304 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 06:06:22,305 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:06:22" (1/1) ... [2022-04-05 06:06:22,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 06:06:22,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:06:22,343 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-05 06:06:22,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-05 06:06:22,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 06:06:22,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 06:06:22,371 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 06:06:22,371 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 06:06:22,372 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 06:06:22,372 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 06:06:22,372 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 06:06:22,373 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 06:06:22,374 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 06:06:22,374 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 06:06:22,374 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 06:06:22,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 06:06:22,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 06:06:22,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 06:06:22,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 06:06:22,374 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 06:06:22,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 06:06:22,427 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 06:06:22,428 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 06:06:22,608 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 06:06:22,613 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 06:06:22,613 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-04-05 06:06:22,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 06:06:22 BoogieIcfgContainer [2022-04-05 06:06:22,615 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 06:06:22,616 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 06:06:22,616 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 06:06:22,617 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 06:06:22,619 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 06:06:22" (1/1) ... [2022-04-05 06:06:22,621 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-05 06:06:22,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 06:06:22 BasicIcfg [2022-04-05 06:06:22,632 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 06:06:22,634 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 06:06:22,634 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 06:06:22,636 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 06:06:22,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 06:06:22" (1/4) ... [2022-04-05 06:06:22,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@242adac6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 06:06:22, skipping insertion in model container [2022-04-05 06:06:22,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 06:06:22" (2/4) ... [2022-04-05 06:06:22,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@242adac6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 06:06:22, skipping insertion in model container [2022-04-05 06:06:22,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 06:06:22" (3/4) ... [2022-04-05 06:06:22,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@242adac6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 06:06:22, skipping insertion in model container [2022-04-05 06:06:22,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 06:06:22" (4/4) ... [2022-04-05 06:06:22,639 INFO L111 eAbstractionObserver]: Analyzing ICFG nested3-1.cqvasr [2022-04-05 06:06:22,655 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-05 06:06:22,655 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 06:06:22,727 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 06:06:22,733 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-05 06:06:22,733 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 06:06:22,745 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-05 06:06:22,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-05 06:06:22,749 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:06:22,749 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:06:22,749 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:06:22,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:06:22,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1301415802, now seen corresponding path program 1 times [2022-04-05 06:06:22,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:06:22,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616334610] [2022-04-05 06:06:22,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:06:22,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:06:22,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:22,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:06:22,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:22,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:06:22,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:06:22,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616334610] [2022-04-05 06:06:22,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616334610] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 06:06:22,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 06:06:22,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 06:06:22,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221610963] [2022-04-05 06:06:22,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 06:06:22,961 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 06:06:22,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:06:22,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 06:06:22,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 06:06:22,995 INFO L87 Difference]: Start difference. First operand has 25 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 06:06:23,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:06:23,058 INFO L93 Difference]: Finished difference Result 44 states and 63 transitions. [2022-04-05 06:06:23,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 06:06:23,060 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 11 [2022-04-05 06:06:23,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:06:23,071 INFO L225 Difference]: With dead ends: 44 [2022-04-05 06:06:23,071 INFO L226 Difference]: Without dead ends: 20 [2022-04-05 06:06:23,074 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 06:06:23,079 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 16 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 06:06:23,080 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 29 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 06:06:23,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-04-05 06:06:23,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-04-05 06:06:23,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 06:06:23,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-04-05 06:06:23,122 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 11 [2022-04-05 06:06:23,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:06:23,123 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-04-05 06:06:23,124 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 06:06:23,124 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-04-05 06:06:23,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-05 06:06:23,125 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:06:23,125 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:06:23,125 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 06:06:23,126 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:06:23,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:06:23,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1302339323, now seen corresponding path program 1 times [2022-04-05 06:06:23,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:06:23,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124981996] [2022-04-05 06:06:23,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:06:23,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:06:23,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:23,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:06:23,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:23,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:06:23,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:06:23,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124981996] [2022-04-05 06:06:23,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124981996] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 06:06:23,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 06:06:23,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 06:06:23,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445673301] [2022-04-05 06:06:23,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 06:06:23,271 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 06:06:23,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:06:23,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 06:06:23,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 06:06:23,273 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 06:06:23,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:06:23,349 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2022-04-05 06:06:23,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 06:06:23,350 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 11 [2022-04-05 06:06:23,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:06:23,352 INFO L225 Difference]: With dead ends: 34 [2022-04-05 06:06:23,353 INFO L226 Difference]: Without dead ends: 27 [2022-04-05 06:06:23,356 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-05 06:06:23,357 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 26 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 06:06:23,358 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 27 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 06:06:23,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-04-05 06:06:23,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2022-04-05 06:06:23,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 06:06:23,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-04-05 06:06:23,367 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 11 [2022-04-05 06:06:23,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:06:23,367 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-04-05 06:06:23,367 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 06:06:23,367 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-04-05 06:06:23,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-05 06:06:23,368 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:06:23,368 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:06:23,368 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-05 06:06:23,369 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:06:23,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:06:23,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1748313539, now seen corresponding path program 1 times [2022-04-05 06:06:23,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:06:23,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630924681] [2022-04-05 06:06:23,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:06:23,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:06:23,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:23,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:06:23,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:23,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:06:23,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:06:23,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630924681] [2022-04-05 06:06:23,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630924681] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 06:06:23,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 06:06:23,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 06:06:23,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790985704] [2022-04-05 06:06:23,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 06:06:23,426 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 06:06:23,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:06:23,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 06:06:23,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 06:06:23,427 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 06:06:23,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:06:23,474 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2022-04-05 06:06:23,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 06:06:23,475 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-05 06:06:23,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:06:23,475 INFO L225 Difference]: With dead ends: 39 [2022-04-05 06:06:23,475 INFO L226 Difference]: Without dead ends: 25 [2022-04-05 06:06:23,476 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-05 06:06:23,477 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 21 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 06:06:23,477 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 27 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 06:06:23,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-04-05 06:06:23,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2022-04-05 06:06:23,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 06:06:23,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-04-05 06:06:23,483 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 12 [2022-04-05 06:06:23,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:06:23,483 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-04-05 06:06:23,483 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 06:06:23,483 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-04-05 06:06:23,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-04-05 06:06:23,484 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:06:23,484 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:06:23,484 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-05 06:06:23,484 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:06:23,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:06:23,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1606116621, now seen corresponding path program 1 times [2022-04-05 06:06:23,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:06:23,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905710321] [2022-04-05 06:06:23,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:06:23,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:06:23,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:23,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:06:23,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:23,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:06:23,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:06:23,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905710321] [2022-04-05 06:06:23,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905710321] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 06:06:23,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 06:06:23,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 06:06:23,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426705989] [2022-04-05 06:06:23,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 06:06:23,562 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 06:06:23,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:06:23,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 06:06:23,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 06:06:23,563 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 06:06:23,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:06:23,605 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2022-04-05 06:06:23,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 06:06:23,605 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 13 [2022-04-05 06:06:23,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:06:23,606 INFO L225 Difference]: With dead ends: 39 [2022-04-05 06:06:23,606 INFO L226 Difference]: Without dead ends: 24 [2022-04-05 06:06:23,607 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-05 06:06:23,614 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 06:06:23,615 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 28 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 06:06:23,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-04-05 06:06:23,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-04-05 06:06:23,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 06:06:23,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-04-05 06:06:23,625 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 13 [2022-04-05 06:06:23,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:06:23,625 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-04-05 06:06:23,625 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 06:06:23,625 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-04-05 06:06:23,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-04-05 06:06:23,626 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:06:23,626 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:06:23,626 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-05 06:06:23,626 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:06:23,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:06:23,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1773342651, now seen corresponding path program 1 times [2022-04-05 06:06:23,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:06:23,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841895728] [2022-04-05 06:06:23,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:06:23,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:06:23,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:23,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:06:23,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:23,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:06:23,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:06:23,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841895728] [2022-04-05 06:06:23,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841895728] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:06:23,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900159064] [2022-04-05 06:06:23,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:06:23,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:06:23,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:06:23,707 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:06:23,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-05 06:06:23,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:23,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-05 06:06:23,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:06:23,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:06:23,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:06:23,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:06:23,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900159064] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:06:23,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:06:23,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-04-05 06:06:23,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153944863] [2022-04-05 06:06:23,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:06:23,836 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-05 06:06:23,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:06:23,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-05 06:06:23,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-04-05 06:06:23,837 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 06:06:23,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:06:23,943 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2022-04-05 06:06:23,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-05 06:06:23,944 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 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 14 [2022-04-05 06:06:23,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:06:23,944 INFO L225 Difference]: With dead ends: 43 [2022-04-05 06:06:23,945 INFO L226 Difference]: Without dead ends: 27 [2022-04-05 06:06:23,945 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-04-05 06:06:23,946 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 06:06:23,946 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 38 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 06:06:23,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-04-05 06:06:23,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-04-05 06:06:23,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 06:06:23,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-04-05 06:06:23,952 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 14 [2022-04-05 06:06:23,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:06:23,952 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-04-05 06:06:23,952 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 06:06:23,952 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-04-05 06:06:23,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-05 06:06:23,953 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:06:23,953 INFO L499 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:06:23,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-05 06:06:24,176 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:06:24,176 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:06:24,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:06:24,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1029731085, now seen corresponding path program 2 times [2022-04-05 06:06:24,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:06:24,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409963326] [2022-04-05 06:06:24,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:06:24,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:06:24,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:24,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:06:24,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:24,293 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:06:24,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:06:24,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409963326] [2022-04-05 06:06:24,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409963326] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:06:24,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107282107] [2022-04-05 06:06:24,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 06:06:24,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:06:24,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:06:24,295 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:06:24,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-05 06:06:24,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:06:24,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:06:24,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-05 06:06:24,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:06:24,435 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:06:24,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:06:24,550 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:06:24,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107282107] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:06:24,551 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:06:24,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-04-05 06:06:24,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144188451] [2022-04-05 06:06:24,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:06:24,551 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-05 06:06:24,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:06:24,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-05 06:06:24,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2022-04-05 06:06:24,553 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 06:06:24,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:06:24,999 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-04-05 06:06:25,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-05 06:06:25,002 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 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 17 [2022-04-05 06:06:25,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:06:25,003 INFO L225 Difference]: With dead ends: 52 [2022-04-05 06:06:25,003 INFO L226 Difference]: Without dead ends: 33 [2022-04-05 06:06:25,004 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2022-04-05 06:06:25,004 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 20 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 06:06:25,005 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 53 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 06:06:25,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-05 06:06:25,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-04-05 06:06:25,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 states have internal predecessors, (28), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 06:06:25,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-04-05 06:06:25,011 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 17 [2022-04-05 06:06:25,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:06:25,011 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-04-05 06:06:25,011 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 06:06:25,012 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-04-05 06:06:25,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-05 06:06:25,012 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:06:25,012 INFO L499 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:06:25,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-05 06:06:25,227 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-04-05 06:06:25,228 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:06:25,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:06:25,228 INFO L85 PathProgramCache]: Analyzing trace with hash -531163149, now seen corresponding path program 3 times [2022-04-05 06:06:25,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:06:25,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739363492] [2022-04-05 06:06:25,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:06:25,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:06:25,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:25,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:06:25,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:25,462 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:06:25,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:06:25,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739363492] [2022-04-05 06:06:25,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739363492] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:06:25,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484181567] [2022-04-05 06:06:25,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 06:06:25,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:06:25,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:06:25,464 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:06:25,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-05 06:06:25,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-04-05 06:06:25,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:06:25,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-05 06:06:25,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:06:25,878 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-05 06:06:25,878 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 06:06:25,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484181567] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 06:06:25,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-05 06:06:25,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 18 [2022-04-05 06:06:25,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091312347] [2022-04-05 06:06:25,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 06:06:25,879 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 06:06:25,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:06:25,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 06:06:25,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-04-05 06:06:25,882 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 06:06:25,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:06:25,911 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2022-04-05 06:06:25,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 06:06:25,912 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-04-05 06:06:25,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:06:25,912 INFO L225 Difference]: With dead ends: 37 [2022-04-05 06:06:25,912 INFO L226 Difference]: Without dead ends: 35 [2022-04-05 06:06:25,913 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-04-05 06:06:25,913 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 06:06:25,914 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 86 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 10 Unchecked, 0.0s Time] [2022-04-05 06:06:25,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-05 06:06:25,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-04-05 06:06:25,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 06:06:25,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-04-05 06:06:25,921 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 23 [2022-04-05 06:06:25,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:06:25,921 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-04-05 06:06:25,922 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 06:06:25,922 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-04-05 06:06:25,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-05 06:06:25,922 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:06:25,922 INFO L499 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:06:25,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-05 06:06:26,145 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:06:26,145 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:06:26,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:06:26,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1526416453, now seen corresponding path program 1 times [2022-04-05 06:06:26,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:06:26,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110522104] [2022-04-05 06:06:26,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:06:26,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:06:26,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:26,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:06:26,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:26,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-05 06:06:26,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:26,354 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 3 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 06:06:26,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:06:26,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110522104] [2022-04-05 06:06:26,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110522104] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:06:26,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619544737] [2022-04-05 06:06:26,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:06:26,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:06:26,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:06:26,356 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:06:26,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-05 06:06:26,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:26,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-05 06:06:26,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:06:26,522 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-05 06:06:26,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:06:26,689 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-05 06:06:26,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619544737] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:06:26,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:06:26,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 6, 6] total 22 [2022-04-05 06:06:26,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627143568] [2022-04-05 06:06:26,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:06:26,690 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-05 06:06:26,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:06:26,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-05 06:06:26,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-04-05 06:06:26,691 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-05 06:06:27,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:06:27,938 INFO L93 Difference]: Finished difference Result 108 states and 129 transitions. [2022-04-05 06:06:27,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-04-05 06:06:27,939 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 30 [2022-04-05 06:06:27,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:06:27,939 INFO L225 Difference]: With dead ends: 108 [2022-04-05 06:06:27,939 INFO L226 Difference]: Without dead ends: 81 [2022-04-05 06:06:27,941 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1323 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=776, Invalid=4194, Unknown=0, NotChecked=0, Total=4970 [2022-04-05 06:06:27,942 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 43 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 06:06:27,942 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 93 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 06:06:27,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-04-05 06:06:27,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2022-04-05 06:06:27,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 69 states have (on average 1.1014492753623188) internal successors, (76), 69 states have internal predecessors, (76), 8 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-05 06:06:27,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 90 transitions. [2022-04-05 06:06:27,961 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 90 transitions. Word has length 30 [2022-04-05 06:06:27,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:06:27,961 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 90 transitions. [2022-04-05 06:06:27,961 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-05 06:06:27,961 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 90 transitions. [2022-04-05 06:06:27,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-04-05 06:06:27,963 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:06:27,963 INFO L499 BasicCegarLoop]: trace histogram [44, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:06:27,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-05 06:06:28,179 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:06:28,179 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:06:28,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:06:28,180 INFO L85 PathProgramCache]: Analyzing trace with hash 686217539, now seen corresponding path program 2 times [2022-04-05 06:06:28,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:06:28,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747369100] [2022-04-05 06:06:28,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:06:28,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:06:28,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:28,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:06:28,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:28,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-05 06:06:28,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:28,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-05 06:06:28,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:28,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-04-05 06:06:28,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:28,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-04-05 06:06:28,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:28,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 444 proven. 66 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2022-04-05 06:06:28,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:06:28,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747369100] [2022-04-05 06:06:28,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747369100] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:06:28,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35584588] [2022-04-05 06:06:28,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 06:06:28,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:06:28,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:06:28,447 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:06:28,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-05 06:06:28,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:06:28,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:06:28,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-05 06:06:28,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:06:28,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 8 proven. 931 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2022-04-05 06:06:28,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:06:29,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 43 proven. 896 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2022-04-05 06:06:29,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35584588] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:06:29,329 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:06:29,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 35 [2022-04-05 06:06:29,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428089114] [2022-04-05 06:06:29,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:06:29,330 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-05 06:06:29,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:06:29,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-05 06:06:29,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2022-04-05 06:06:29,331 INFO L87 Difference]: Start difference. First operand 80 states and 90 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 10 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-05 06:06:37,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:06:37,048 INFO L93 Difference]: Finished difference Result 254 states and 302 transitions. [2022-04-05 06:06:37,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-04-05 06:06:37,049 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 10 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 88 [2022-04-05 06:06:37,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:06:37,051 INFO L225 Difference]: With dead ends: 254 [2022-04-05 06:06:37,051 INFO L226 Difference]: Without dead ends: 181 [2022-04-05 06:06:37,059 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10226 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=3642, Invalid=24750, Unknown=0, NotChecked=0, Total=28392 [2022-04-05 06:06:37,060 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 125 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1794 mSolverCounterSat, 563 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 2357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 563 IncrementalHoareTripleChecker+Valid, 1794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-05 06:06:37,060 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 129 Invalid, 2357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [563 Valid, 1794 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-05 06:06:37,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-04-05 06:06:37,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 180. [2022-04-05 06:06:37,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 163 states have (on average 1.0797546012269938) internal successors, (176), 163 states have internal predecessors, (176), 14 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-05 06:06:37,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 202 transitions. [2022-04-05 06:06:37,093 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 202 transitions. Word has length 88 [2022-04-05 06:06:37,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:06:37,093 INFO L478 AbstractCegarLoop]: Abstraction has 180 states and 202 transitions. [2022-04-05 06:06:37,093 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 10 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-05 06:06:37,094 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 202 transitions. [2022-04-05 06:06:37,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-04-05 06:06:37,096 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:06:37,097 INFO L499 BasicCegarLoop]: trace histogram [120, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:06:37,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-05 06:06:37,311 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:06:37,312 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:06:37,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:06:37,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1468060713, now seen corresponding path program 3 times [2022-04-05 06:06:37,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:06:37,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036406895] [2022-04-05 06:06:37,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:06:37,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:06:37,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:37,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:06:37,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:37,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-05 06:06:37,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:37,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-05 06:06:37,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:37,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-05 06:06:37,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:37,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-04-05 06:06:37,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:37,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-04-05 06:06:37,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:37,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-04-05 06:06:37,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:37,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2022-04-05 06:06:37,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:37,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2022-04-05 06:06:37,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:37,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2022-04-05 06:06:37,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:37,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2022-04-05 06:06:37,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:37,676 INFO L134 CoverageAnalysis]: Checked inductivity of 8730 backedges. 1551 proven. 78 refuted. 0 times theorem prover too weak. 7101 trivial. 0 not checked. [2022-04-05 06:06:37,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:06:37,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036406895] [2022-04-05 06:06:37,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036406895] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:06:37,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421370070] [2022-04-05 06:06:37,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 06:06:37,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:06:37,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:06:37,678 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:06:37,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-05 06:06:38,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-04-05 06:06:38,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:06:38,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-05 06:06:38,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:06:38,438 INFO L134 CoverageAnalysis]: Checked inductivity of 8730 backedges. 1596 proven. 78 refuted. 0 times theorem prover too weak. 7056 trivial. 0 not checked. [2022-04-05 06:06:38,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:06:38,825 INFO L134 CoverageAnalysis]: Checked inductivity of 8730 backedges. 1596 proven. 63 refuted. 0 times theorem prover too weak. 7071 trivial. 0 not checked. [2022-04-05 06:06:38,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421370070] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:06:38,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:06:38,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 8] total 24 [2022-04-05 06:06:38,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984058134] [2022-04-05 06:06:38,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:06:38,827 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-05 06:06:38,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:06:38,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-05 06:06:38,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-04-05 06:06:38,828 INFO L87 Difference]: Start difference. First operand 180 states and 202 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:06:39,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:06:39,507 INFO L93 Difference]: Finished difference Result 476 states and 596 transitions. [2022-04-05 06:06:39,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-05 06:06:39,507 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) Word has length 212 [2022-04-05 06:06:39,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:06:39,510 INFO L225 Difference]: With dead ends: 476 [2022-04-05 06:06:39,510 INFO L226 Difference]: Without dead ends: 291 [2022-04-05 06:06:39,512 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 441 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=198, Invalid=1694, Unknown=0, NotChecked=0, Total=1892 [2022-04-05 06:06:39,512 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 62 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 06:06:39,512 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 110 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 06:06:39,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-04-05 06:06:39,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 210. [2022-04-05 06:06:39,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 193 states have (on average 1.1709844559585492) internal successors, (226), 193 states have internal predecessors, (226), 14 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-05 06:06:39,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 252 transitions. [2022-04-05 06:06:39,563 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 252 transitions. Word has length 212 [2022-04-05 06:06:39,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:06:39,564 INFO L478 AbstractCegarLoop]: Abstraction has 210 states and 252 transitions. [2022-04-05 06:06:39,564 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-05 06:06:39,564 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 252 transitions. [2022-04-05 06:06:39,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-04-05 06:06:39,567 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:06:39,567 INFO L499 BasicCegarLoop]: trace histogram [130, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:06:39,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-05 06:06:39,771 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:06:39,772 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:06:39,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:06:39,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1384275715, now seen corresponding path program 4 times [2022-04-05 06:06:39,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:06:39,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042123459] [2022-04-05 06:06:39,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:06:39,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:06:39,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:40,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:06:40,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:40,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-05 06:06:40,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:40,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-05 06:06:40,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:40,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-04-05 06:06:40,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:40,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-05 06:06:40,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:40,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-04-05 06:06:40,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:40,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-05 06:06:40,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:40,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-04-05 06:06:40,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:40,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2022-04-05 06:06:40,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:40,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2022-04-05 06:06:40,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:40,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2022-04-05 06:06:40,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:40,124 INFO L134 CoverageAnalysis]: Checked inductivity of 10075 backedges. 1794 proven. 91 refuted. 0 times theorem prover too weak. 8190 trivial. 0 not checked. [2022-04-05 06:06:40,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:06:40,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042123459] [2022-04-05 06:06:40,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042123459] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:06:40,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228336818] [2022-04-05 06:06:40,125 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 06:06:40,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:06:40,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:06:40,127 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:06:40,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-05 06:06:40,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 06:06:40,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:06:40,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-05 06:06:40,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:06:40,643 INFO L134 CoverageAnalysis]: Checked inductivity of 10075 backedges. 1846 proven. 91 refuted. 0 times theorem prover too weak. 8138 trivial. 0 not checked. [2022-04-05 06:06:40,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:06:41,299 INFO L134 CoverageAnalysis]: Checked inductivity of 10075 backedges. 1812 proven. 91 refuted. 0 times theorem prover too weak. 8172 trivial. 0 not checked. [2022-04-05 06:06:41,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228336818] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:06:41,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:06:41,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-04-05 06:06:41,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681755775] [2022-04-05 06:06:41,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:06:41,300 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-05 06:06:41,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:06:41,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-05 06:06:41,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=707, Unknown=0, NotChecked=0, Total=992 [2022-04-05 06:06:41,301 INFO L87 Difference]: Start difference. First operand 210 states and 252 transitions. Second operand has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:06:54,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:06:54,872 INFO L93 Difference]: Finished difference Result 574 states and 778 transitions. [2022-04-05 06:06:54,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-05 06:06:54,873 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 222 [2022-04-05 06:06:54,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:06:54,874 INFO L225 Difference]: With dead ends: 574 [2022-04-05 06:06:54,874 INFO L226 Difference]: Without dead ends: 371 [2022-04-05 06:06:54,876 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 451 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=985, Invalid=2555, Unknown=0, NotChecked=0, Total=3540 [2022-04-05 06:06:54,876 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 31 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 06:06:54,877 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 103 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 06:06:54,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-04-05 06:06:54,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 370. [2022-04-05 06:06:54,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 353 states have (on average 1.093484419263456) internal successors, (386), 353 states have internal predecessors, (386), 14 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-05 06:06:54,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 412 transitions. [2022-04-05 06:06:54,932 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 412 transitions. Word has length 222 [2022-04-05 06:06:54,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:06:54,933 INFO L478 AbstractCegarLoop]: Abstraction has 370 states and 412 transitions. [2022-04-05 06:06:54,933 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-05 06:06:54,933 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 412 transitions. [2022-04-05 06:06:54,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2022-04-05 06:06:54,937 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:06:54,938 INFO L499 BasicCegarLoop]: trace histogram [290, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:06:54,965 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-04-05 06:06:55,160 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:06:55,160 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:06:55,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:06:55,161 INFO L85 PathProgramCache]: Analyzing trace with hash 528114435, now seen corresponding path program 5 times [2022-04-05 06:06:55,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:06:55,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850375188] [2022-04-05 06:06:55,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:06:55,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:06:55,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:56,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:06:56,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:56,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-04-05 06:06:56,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:56,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-04-05 06:06:56,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:56,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-04-05 06:06:56,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:56,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2022-04-05 06:06:56,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:56,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2022-04-05 06:06:56,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:56,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2022-04-05 06:06:56,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:56,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 260 [2022-04-05 06:06:56,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:56,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 297 [2022-04-05 06:06:56,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:56,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 334 [2022-04-05 06:06:56,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:56,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 371 [2022-04-05 06:06:56,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:06:56,093 INFO L134 CoverageAnalysis]: Checked inductivity of 45195 backedges. 8130 proven. 435 refuted. 0 times theorem prover too weak. 36630 trivial. 0 not checked. [2022-04-05 06:06:56,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:06:56,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850375188] [2022-04-05 06:06:56,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850375188] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:06:56,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599967240] [2022-04-05 06:06:56,094 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 06:06:56,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:06:56,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:06:56,095 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:06:56,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process