/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/in-de52.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 05:52:01,432 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 05:52:01,435 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 05:52:01,479 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-05 05:52:01,494 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 05:52:01,496 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 05:52:01,497 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 05:52:01,500 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 05:52:01,500 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 05:52:01,501 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 05:52:01,503 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 05:52:01,508 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 05:52:01,510 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 05:52:01,511 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 05:52:01,512 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 05:52:01,512 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 05:52:01,514 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 05:52:01,520 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-05 05:52:01,527 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 05:52:01,528 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 05:52:01,529 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 05:52:01,530 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-05 05:52:01,556 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 05:52:01,556 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 05:52:01,557 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-05 05:52:01,557 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-05 05:52:01,558 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-05 05:52:01,558 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-05 05:52:01,558 INFO L138 SettingsManager]: * Use SBE=true [2022-04-05 05:52:01,558 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 05:52:01,558 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 05:52:01,559 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 05:52:01,559 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 05:52:01,559 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 05:52:01,560 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 05:52:01,560 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 05:52:01,560 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 05:52:01,560 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 05:52:01,560 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 05:52:01,560 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 05:52:01,560 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 05:52:01,560 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 05:52:01,561 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 05:52:01,561 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-05 05:52:01,561 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-05 05:52:01,561 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 05:52:01,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-05 05:52:01,562 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-05 05:52:01,562 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-05 05:52:01,562 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-05 05:52:01,563 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 05:52:01,563 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 05:52:01,757 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 05:52:01,780 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 05:52:01,784 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 05:52:01,786 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 05:52:01,786 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 05:52:01,787 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de52.c [2022-04-05 05:52:01,851 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e6630893/36caae73dac946eba4fec51814ea9640/FLAG1e470ee84 [2022-04-05 05:52:02,205 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 05:52:02,206 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de52.c [2022-04-05 05:52:02,210 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e6630893/36caae73dac946eba4fec51814ea9640/FLAG1e470ee84 [2022-04-05 05:52:02,640 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e6630893/36caae73dac946eba4fec51814ea9640 [2022-04-05 05:52:02,642 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 05:52:02,643 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 05:52:02,646 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 05:52:02,646 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 05:52:02,650 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 05:52:02,651 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 05:52:02" (1/1) ... [2022-04-05 05:52:02,652 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b985681 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:52:02, skipping insertion in model container [2022-04-05 05:52:02,652 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 05:52:02" (1/1) ... [2022-04-05 05:52:02,658 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 05:52:02,670 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 05:52:02,794 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/in-de52.c[368,381] [2022-04-05 05:52:02,806 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 05:52:02,812 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 05:52:02,820 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/in-de52.c[368,381] [2022-04-05 05:52:02,824 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 05:52:02,834 INFO L208 MainTranslator]: Completed translation [2022-04-05 05:52:02,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:52:02 WrapperNode [2022-04-05 05:52:02,834 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 05:52:02,836 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 05:52:02,837 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 05:52:02,837 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 05:52:02,845 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:52:02" (1/1) ... [2022-04-05 05:52:02,846 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:52:02" (1/1) ... [2022-04-05 05:52:02,850 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:52:02" (1/1) ... [2022-04-05 05:52:02,851 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:52:02" (1/1) ... [2022-04-05 05:52:02,859 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:52:02" (1/1) ... [2022-04-05 05:52:02,863 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:52:02" (1/1) ... [2022-04-05 05:52:02,864 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:52:02" (1/1) ... [2022-04-05 05:52:02,865 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 05:52:02,866 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 05:52:02,866 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 05:52:02,866 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 05:52:02,867 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:52:02" (1/1) ... [2022-04-05 05:52:02,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 05:52:02,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:52:02,900 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-05 05:52:02,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-05 05:52:02,933 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 05:52:02,933 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 05:52:02,933 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 05:52:02,933 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 05:52:02,933 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 05:52:02,933 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 05:52:02,935 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 05:52:02,936 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 05:52:02,936 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 05:52:02,936 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-05 05:52:02,936 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 05:52:02,937 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 05:52:02,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 05:52:02,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 05:52:02,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 05:52:02,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 05:52:02,940 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 05:52:02,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 05:52:02,995 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 05:52:02,996 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 05:52:03,116 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 05:52:03,121 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 05:52:03,121 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-04-05 05:52:03,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 05:52:03 BoogieIcfgContainer [2022-04-05 05:52:03,123 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 05:52:03,123 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 05:52:03,123 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 05:52:03,124 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 05:52:03,127 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 05:52:03" (1/1) ... [2022-04-05 05:52:03,129 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-05 05:52:03,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 05:52:03 BasicIcfg [2022-04-05 05:52:03,142 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 05:52:03,144 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 05:52:03,144 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 05:52:03,146 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 05:52:03,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 05:52:02" (1/4) ... [2022-04-05 05:52:03,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b338de6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 05:52:03, skipping insertion in model container [2022-04-05 05:52:03,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:52:02" (2/4) ... [2022-04-05 05:52:03,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b338de6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 05:52:03, skipping insertion in model container [2022-04-05 05:52:03,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 05:52:03" (3/4) ... [2022-04-05 05:52:03,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b338de6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 05:52:03, skipping insertion in model container [2022-04-05 05:52:03,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 05:52:03" (4/4) ... [2022-04-05 05:52:03,148 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de52.cqvasr [2022-04-05 05:52:03,153 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-05 05:52:03,153 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 05:52:03,223 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 05:52:03,229 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-05 05:52:03,229 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 05:52:03,243 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-05 05:52:03,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-04-05 05:52:03,246 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:52:03,247 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:52:03,247 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:52:03,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:52:03,256 INFO L85 PathProgramCache]: Analyzing trace with hash 702671213, now seen corresponding path program 1 times [2022-04-05 05:52:03,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:52:03,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402711777] [2022-04-05 05:52:03,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:52:03,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:52:03,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:03,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:52:03,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:03,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:52:03,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:52:03,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402711777] [2022-04-05 05:52:03,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402711777] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 05:52:03,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 05:52:03,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 05:52:03,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198322857] [2022-04-05 05:52:03,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 05:52:03,457 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 05:52:03,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:52:03,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 05:52:03,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 05:52:03,492 INFO L87 Difference]: Start difference. First operand has 24 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:03,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:52:03,541 INFO L93 Difference]: Finished difference Result 41 states and 60 transitions. [2022-04-05 05:52:03,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 05:52:03,544 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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 16 [2022-04-05 05:52:03,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:52:03,555 INFO L225 Difference]: With dead ends: 41 [2022-04-05 05:52:03,555 INFO L226 Difference]: Without dead ends: 17 [2022-04-05 05:52:03,558 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 05:52:03,563 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 05:52:03,564 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 30 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 05:52:03,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-04-05 05:52:03,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-04-05 05:52:03,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:03,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-04-05 05:52:03,603 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 16 [2022-04-05 05:52:03,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:52:03,604 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-04-05 05:52:03,604 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:03,604 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-04-05 05:52:03,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-04-05 05:52:03,605 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:52:03,605 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:52:03,605 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 05:52:03,605 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:52:03,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:52:03,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1128942900, now seen corresponding path program 1 times [2022-04-05 05:52:03,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:52:03,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801554701] [2022-04-05 05:52:03,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:52:03,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:52:03,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:03,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:52:03,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:03,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:52:03,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:52:03,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801554701] [2022-04-05 05:52:03,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801554701] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 05:52:03,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 05:52:03,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-05 05:52:03,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946900021] [2022-04-05 05:52:03,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 05:52:03,730 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 05:52:03,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:52:03,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 05:52:03,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-05 05:52:03,731 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:03,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:52:03,842 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2022-04-05 05:52:03,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 05:52:03,842 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 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 16 [2022-04-05 05:52:03,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:52:03,843 INFO L225 Difference]: With dead ends: 34 [2022-04-05 05:52:03,843 INFO L226 Difference]: Without dead ends: 23 [2022-04-05 05:52:03,844 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-04-05 05:52:03,845 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 28 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 05:52:03,846 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 32 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 05:52:03,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-04-05 05:52:03,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-04-05 05:52:03,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:03,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2022-04-05 05:52:03,852 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 16 [2022-04-05 05:52:03,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:52:03,852 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2022-04-05 05:52:03,853 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:03,853 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2022-04-05 05:52:03,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-05 05:52:03,853 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:52:03,853 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:52:03,854 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-05 05:52:03,855 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:52:03,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:52:03,856 INFO L85 PathProgramCache]: Analyzing trace with hash -610770875, now seen corresponding path program 1 times [2022-04-05 05:52:03,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:52:03,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785560231] [2022-04-05 05:52:03,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:52:03,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:52:03,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:03,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:52:03,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:03,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:52:03,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:52:03,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785560231] [2022-04-05 05:52:03,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785560231] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 05:52:03,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 05:52:03,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 05:52:03,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984802392] [2022-04-05 05:52:03,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 05:52:03,945 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 05:52:03,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:52:03,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 05:52:03,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 05:52:03,946 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:04,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:52:04,006 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2022-04-05 05:52:04,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 05:52:04,007 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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 17 [2022-04-05 05:52:04,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:52:04,008 INFO L225 Difference]: With dead ends: 34 [2022-04-05 05:52:04,008 INFO L226 Difference]: Without dead ends: 27 [2022-04-05 05:52:04,008 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-05 05:52:04,010 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 21 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 05:52:04,010 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 26 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 05:52:04,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-04-05 05:52:04,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-04-05 05:52:04,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:04,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2022-04-05 05:52:04,017 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 17 [2022-04-05 05:52:04,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:52:04,018 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2022-04-05 05:52:04,018 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:04,018 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2022-04-05 05:52:04,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-05 05:52:04,019 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:52:04,019 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:52:04,019 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-05 05:52:04,019 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:52:04,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:52:04,020 INFO L85 PathProgramCache]: Analyzing trace with hash 162216202, now seen corresponding path program 1 times [2022-04-05 05:52:04,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:52:04,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891593562] [2022-04-05 05:52:04,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:52:04,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:52:04,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:04,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:52:04,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:04,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:52:04,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:52:04,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891593562] [2022-04-05 05:52:04,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891593562] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 05:52:04,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 05:52:04,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 05:52:04,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122133467] [2022-04-05 05:52:04,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 05:52:04,082 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 05:52:04,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:52:04,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 05:52:04,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 05:52:04,083 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:04,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:52:04,147 INFO L93 Difference]: Finished difference Result 43 states and 59 transitions. [2022-04-05 05:52:04,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 05:52:04,148 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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 17 [2022-04-05 05:52:04,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:52:04,148 INFO L225 Difference]: With dead ends: 43 [2022-04-05 05:52:04,148 INFO L226 Difference]: Without dead ends: 32 [2022-04-05 05:52:04,149 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-05 05:52:04,150 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 21 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 05:52:04,151 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 27 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 05:52:04,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-05 05:52:04,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-04-05 05:52:04,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:04,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2022-04-05 05:52:04,158 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 17 [2022-04-05 05:52:04,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:52:04,158 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2022-04-05 05:52:04,159 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:04,159 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2022-04-05 05:52:04,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-05 05:52:04,159 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:52:04,159 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:52:04,160 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-05 05:52:04,160 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:52:04,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:52:04,160 INFO L85 PathProgramCache]: Analyzing trace with hash -211948756, now seen corresponding path program 1 times [2022-04-05 05:52:04,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:52:04,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329729744] [2022-04-05 05:52:04,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:52:04,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:52:04,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:04,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:52:04,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:04,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 05:52:04,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:52:04,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329729744] [2022-04-05 05:52:04,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329729744] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 05:52:04,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 05:52:04,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 05:52:04,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933784214] [2022-04-05 05:52:04,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 05:52:04,225 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 05:52:04,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:52:04,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 05:52:04,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 05:52:04,226 INFO L87 Difference]: Start difference. First operand 32 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:04,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:52:04,288 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2022-04-05 05:52:04,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 05:52:04,291 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 18 [2022-04-05 05:52:04,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:52:04,296 INFO L225 Difference]: With dead ends: 40 [2022-04-05 05:52:04,296 INFO L226 Difference]: Without dead ends: 28 [2022-04-05 05:52:04,296 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-04-05 05:52:04,297 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 18 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 05:52:04,298 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 31 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 05:52:04,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-04-05 05:52:04,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-04-05 05:52:04,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:04,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2022-04-05 05:52:04,304 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 18 [2022-04-05 05:52:04,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:52:04,304 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2022-04-05 05:52:04,304 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:04,304 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2022-04-05 05:52:04,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-04-05 05:52:04,305 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:52:04,305 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:52:04,305 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-04-05 05:52:04,305 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:52:04,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:52:04,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1893166358, now seen corresponding path program 1 times [2022-04-05 05:52:04,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:52:04,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970393087] [2022-04-05 05:52:04,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:52:04,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:52:04,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:04,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:52:04,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:04,406 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 05:52:04,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:52:04,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970393087] [2022-04-05 05:52:04,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970393087] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:52:04,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518845459] [2022-04-05 05:52:04,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:52:04,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:52:04,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:52:04,409 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:52:04,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-05 05:52:04,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:04,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-05 05:52:04,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:52:04,554 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 05:52:04,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:52:04,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 05:52:04,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518845459] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-05 05:52:04,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-04-05 05:52:04,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 9 [2022-04-05 05:52:04,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8670385] [2022-04-05 05:52:04,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 05:52:04,640 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 05:52:04,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:52:04,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 05:52:04,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-04-05 05:52:04,641 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 05:52:04,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:52:04,671 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2022-04-05 05:52:04,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 05:52:04,672 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 19 [2022-04-05 05:52:04,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:52:04,673 INFO L225 Difference]: With dead ends: 35 [2022-04-05 05:52:04,674 INFO L226 Difference]: Without dead ends: 25 [2022-04-05 05:52:04,675 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-04-05 05:52:04,676 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 3 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 05:52:04,677 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 27 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 05:52:04,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-04-05 05:52:04,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-04-05 05:52:04,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:04,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-04-05 05:52:04,682 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 19 [2022-04-05 05:52:04,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:52:04,682 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-04-05 05:52:04,682 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 05:52:04,682 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-04-05 05:52:04,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-04-05 05:52:04,690 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:52:04,690 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:52:04,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-05 05:52:04,903 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-04-05 05:52:04,904 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:52:04,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:52:04,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1618157770, now seen corresponding path program 1 times [2022-04-05 05:52:04,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:52:04,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579657026] [2022-04-05 05:52:04,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:52:04,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:52:04,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:04,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:52:04,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:05,005 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 05:52:05,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:52:05,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579657026] [2022-04-05 05:52:05,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579657026] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:52:05,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704007354] [2022-04-05 05:52:05,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:52:05,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:52:05,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:52:05,009 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:52:05,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-05 05:52:05,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:05,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-05 05:52:05,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:52:05,114 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 05:52:05,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:52:05,183 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 05:52:05,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704007354] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-05 05:52:05,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-04-05 05:52:05,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 9 [2022-04-05 05:52:05,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841731018] [2022-04-05 05:52:05,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 05:52:05,184 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 05:52:05,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:52:05,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 05:52:05,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-04-05 05:52:05,185 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 05:52:05,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:52:05,209 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2022-04-05 05:52:05,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 05:52:05,210 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 19 [2022-04-05 05:52:05,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:52:05,211 INFO L225 Difference]: With dead ends: 30 [2022-04-05 05:52:05,211 INFO L226 Difference]: Without dead ends: 22 [2022-04-05 05:52:05,211 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-04-05 05:52:05,213 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 1 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 05:52:05,214 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 31 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 05:52:05,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-04-05 05:52:05,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-04-05 05:52:05,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:05,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2022-04-05 05:52:05,222 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 19 [2022-04-05 05:52:05,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:52:05,223 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2022-04-05 05:52:05,223 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 05:52:05,223 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2022-04-05 05:52:05,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-05 05:52:05,223 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:52:05,224 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:52:05,240 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 05:52:05,424 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,SelfDestructingSolverStorable6 [2022-04-05 05:52:05,424 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:52:05,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:52:05,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1538757236, now seen corresponding path program 1 times [2022-04-05 05:52:05,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:52:05,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179176912] [2022-04-05 05:52:05,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:52:05,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:52:05,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:05,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:52:05,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:05,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 05:52:05,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:52:05,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179176912] [2022-04-05 05:52:05,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179176912] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:52:05,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105273323] [2022-04-05 05:52:05,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:52:05,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:52:05,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:52:05,532 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:52:05,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-05 05:52:05,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:05,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-05 05:52:05,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:52:05,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 05:52:05,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:52:05,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 05:52:05,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105273323] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:52:05,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:52:05,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-04-05 05:52:05,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524967837] [2022-04-05 05:52:05,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:52:05,695 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 05:52:05,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:52:05,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 05:52:05,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 05:52:05,696 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:05,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:52:05,763 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2022-04-05 05:52:05,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 05:52:05,763 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 20 [2022-04-05 05:52:05,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:52:05,764 INFO L225 Difference]: With dead ends: 33 [2022-04-05 05:52:05,764 INFO L226 Difference]: Without dead ends: 26 [2022-04-05 05:52:05,764 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-04-05 05:52:05,772 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 22 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 05:52:05,772 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 29 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 05:52:05,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-04-05 05:52:05,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-04-05 05:52:05,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:05,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2022-04-05 05:52:05,778 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 20 [2022-04-05 05:52:05,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:52:05,778 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2022-04-05 05:52:05,778 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:05,778 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2022-04-05 05:52:05,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-05 05:52:05,779 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:52:05,779 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:52:05,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-05 05:52:06,002 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:52:06,002 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:52:06,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:52:06,003 INFO L85 PathProgramCache]: Analyzing trace with hash -765770159, now seen corresponding path program 1 times [2022-04-05 05:52:06,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:52:06,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486500290] [2022-04-05 05:52:06,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:52:06,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:52:06,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:06,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:52:06,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:06,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 05:52:06,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:52:06,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486500290] [2022-04-05 05:52:06,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486500290] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:52:06,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662596337] [2022-04-05 05:52:06,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:52:06,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:52:06,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:52:06,120 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:52:06,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-05 05:52:06,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:06,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-05 05:52:06,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:52:06,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:52:06,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:52:06,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 05:52:06,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662596337] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:52:06,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:52:06,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 4] total 13 [2022-04-05 05:52:06,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094960701] [2022-04-05 05:52:06,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:52:06,374 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-05 05:52:06,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:52:06,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-05 05:52:06,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-04-05 05:52:06,376 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:06,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:52:06,622 INFO L93 Difference]: Finished difference Result 63 states and 90 transitions. [2022-04-05 05:52:06,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-05 05:52:06,622 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 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 20 [2022-04-05 05:52:06,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:52:06,624 INFO L225 Difference]: With dead ends: 63 [2022-04-05 05:52:06,624 INFO L226 Difference]: Without dead ends: 49 [2022-04-05 05:52:06,625 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2022-04-05 05:52:06,626 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 39 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 05:52:06,626 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 49 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 05:52:06,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-04-05 05:52:06,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2022-04-05 05:52:06,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 35 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:06,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2022-04-05 05:52:06,648 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 20 [2022-04-05 05:52:06,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:52:06,649 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2022-04-05 05:52:06,649 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:06,649 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2022-04-05 05:52:06,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-05 05:52:06,650 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:52:06,650 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:52:06,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-05 05:52:06,852 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:52:06,853 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:52:06,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:52:06,853 INFO L85 PathProgramCache]: Analyzing trace with hash 2057649504, now seen corresponding path program 1 times [2022-04-05 05:52:06,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:52:06,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406278727] [2022-04-05 05:52:06,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:52:06,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:52:06,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:06,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:52:06,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:06,939 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 05:52:06,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:52:06,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406278727] [2022-04-05 05:52:06,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406278727] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:52:06,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360857494] [2022-04-05 05:52:06,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:52:06,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:52:06,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:52:06,941 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:52:06,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-05 05:52:06,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:06,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-05 05:52:06,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:52:07,075 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 05:52:07,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:52:07,148 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-05 05:52:07,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360857494] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:52:07,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:52:07,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 12 [2022-04-05 05:52:07,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348249248] [2022-04-05 05:52:07,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:52:07,150 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-05 05:52:07,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:52:07,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-05 05:52:07,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-04-05 05:52:07,151 INFO L87 Difference]: Start difference. First operand 40 states and 52 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 9 states have internal predecessors, (34), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:07,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:52:07,299 INFO L93 Difference]: Finished difference Result 57 states and 74 transitions. [2022-04-05 05:52:07,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-05 05:52:07,300 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 9 states have internal predecessors, (34), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-04-05 05:52:07,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:52:07,301 INFO L225 Difference]: With dead ends: 57 [2022-04-05 05:52:07,301 INFO L226 Difference]: Without dead ends: 49 [2022-04-05 05:52:07,301 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-04-05 05:52:07,302 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 31 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 05:52:07,302 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 49 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 05:52:07,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-04-05 05:52:07,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2022-04-05 05:52:07,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 41 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:07,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 62 transitions. [2022-04-05 05:52:07,309 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 62 transitions. Word has length 21 [2022-04-05 05:52:07,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:52:07,309 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 62 transitions. [2022-04-05 05:52:07,309 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 9 states have internal predecessors, (34), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:07,309 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 62 transitions. [2022-04-05 05:52:07,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-05 05:52:07,310 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:52:07,310 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:52:07,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-05 05:52:07,532 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-05 05:52:07,532 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:52:07,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:52:07,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1877108748, now seen corresponding path program 2 times [2022-04-05 05:52:07,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:52:07,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329774380] [2022-04-05 05:52:07,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:52:07,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:52:07,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:07,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:52:07,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:07,583 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-05 05:52:07,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:52:07,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329774380] [2022-04-05 05:52:07,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329774380] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:52:07,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080690282] [2022-04-05 05:52:07,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 05:52:07,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:52:07,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:52:07,585 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:52:07,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-05 05:52:07,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 05:52:07,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:52:07,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-05 05:52:07,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:52:07,685 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-05 05:52:07,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:52:07,735 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-05 05:52:07,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080690282] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:52:07,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:52:07,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-04-05 05:52:07,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4851918] [2022-04-05 05:52:07,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:52:07,737 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 05:52:07,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:52:07,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 05:52:07,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 05:52:07,737 INFO L87 Difference]: Start difference. First operand 46 states and 62 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:07,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:52:07,789 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2022-04-05 05:52:07,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 05:52:07,789 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-04-05 05:52:07,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:52:07,790 INFO L225 Difference]: With dead ends: 57 [2022-04-05 05:52:07,790 INFO L226 Difference]: Without dead ends: 38 [2022-04-05 05:52:07,790 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-04-05 05:52:07,791 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 22 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 05:52:07,791 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 30 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 05:52:07,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-04-05 05:52:07,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-04-05 05:52:07,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:07,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 52 transitions. [2022-04-05 05:52:07,796 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 52 transitions. Word has length 22 [2022-04-05 05:52:07,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:52:07,796 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 52 transitions. [2022-04-05 05:52:07,797 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:07,797 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 52 transitions. [2022-04-05 05:52:07,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-05 05:52:07,797 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:52:07,797 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:52:07,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-05 05:52:08,015 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:52:08,016 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:52:08,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:52:08,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1264431284, now seen corresponding path program 2 times [2022-04-05 05:52:08,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:52:08,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646388204] [2022-04-05 05:52:08,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:52:08,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:52:08,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:08,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:52:08,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:08,104 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 05:52:08,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:52:08,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646388204] [2022-04-05 05:52:08,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646388204] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:52:08,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668666783] [2022-04-05 05:52:08,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 05:52:08,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:52:08,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:52:08,106 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:52:08,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-05 05:52:08,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 05:52:08,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:52:08,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-05 05:52:08,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:52:08,230 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 05:52:08,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:52:08,375 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-05 05:52:08,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668666783] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:52:08,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:52:08,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9] total 17 [2022-04-05 05:52:08,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008464672] [2022-04-05 05:52:08,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:52:08,377 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-05 05:52:08,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:52:08,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-05 05:52:08,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-04-05 05:52:08,377 INFO L87 Difference]: Start difference. First operand 38 states and 52 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:08,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:52:08,890 INFO L93 Difference]: Finished difference Result 87 states and 126 transitions. [2022-04-05 05:52:08,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-05 05:52:08,890 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-04-05 05:52:08,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:52:08,891 INFO L225 Difference]: With dead ends: 87 [2022-04-05 05:52:08,891 INFO L226 Difference]: Without dead ends: 59 [2022-04-05 05:52:08,892 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=157, Invalid=899, Unknown=0, NotChecked=0, Total=1056 [2022-04-05 05:52:08,892 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 45 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 05:52:08,892 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 79 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 05:52:08,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-04-05 05:52:08,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2022-04-05 05:52:08,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 44 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:08,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 68 transitions. [2022-04-05 05:52:08,899 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 68 transitions. Word has length 22 [2022-04-05 05:52:08,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:52:08,899 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 68 transitions. [2022-04-05 05:52:08,899 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:08,899 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 68 transitions. [2022-04-05 05:52:08,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-05 05:52:08,900 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:52:08,900 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:52:08,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-05 05:52:09,127 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:52:09,128 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:52:09,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:52:09,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1977751131, now seen corresponding path program 2 times [2022-04-05 05:52:09,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:52:09,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807955562] [2022-04-05 05:52:09,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:52:09,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:52:09,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:09,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:52:09,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:09,222 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 05:52:09,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:52:09,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807955562] [2022-04-05 05:52:09,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807955562] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:52:09,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279114763] [2022-04-05 05:52:09,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 05:52:09,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:52:09,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:52:09,224 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 05:52:09,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-05 05:52:09,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 05:52:09,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:52:09,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-05 05:52:09,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:52:09,329 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 05:52:09,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:52:09,366 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 05:52:09,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279114763] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:52:09,366 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:52:09,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 13 [2022-04-05 05:52:09,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781681957] [2022-04-05 05:52:09,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:52:09,367 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-05 05:52:09,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:52:09,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-05 05:52:09,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-04-05 05:52:09,368 INFO L87 Difference]: Start difference. First operand 49 states and 68 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:09,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:52:09,842 INFO L93 Difference]: Finished difference Result 80 states and 116 transitions. [2022-04-05 05:52:09,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-05 05:52:09,843 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 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 23 [2022-04-05 05:52:09,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:52:09,844 INFO L225 Difference]: With dead ends: 80 [2022-04-05 05:52:09,844 INFO L226 Difference]: Without dead ends: 59 [2022-04-05 05:52:09,844 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=194, Invalid=862, Unknown=0, NotChecked=0, Total=1056 [2022-04-05 05:52:09,845 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 52 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 05:52:09,845 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 68 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 05:52:09,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-04-05 05:52:09,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2022-04-05 05:52:09,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.3725490196078431) internal successors, (70), 51 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:09,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 74 transitions. [2022-04-05 05:52:09,852 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 74 transitions. Word has length 23 [2022-04-05 05:52:09,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:52:09,852 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 74 transitions. [2022-04-05 05:52:09,852 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:09,853 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 74 transitions. [2022-04-05 05:52:09,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-05 05:52:09,853 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:52:09,853 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:52:09,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-05 05:52:10,071 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-05 05:52:10,072 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:52:10,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:52:10,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1606353935, now seen corresponding path program 3 times [2022-04-05 05:52:10,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:52:10,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984533265] [2022-04-05 05:52:10,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:52:10,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:52:10,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:10,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:52:10,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:10,167 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-05 05:52:10,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:52:10,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984533265] [2022-04-05 05:52:10,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984533265] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:52:10,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736676107] [2022-04-05 05:52:10,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 05:52:10,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:52:10,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:52:10,169 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:52:10,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-05 05:52:10,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-04-05 05:52:10,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:52:10,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-05 05:52:10,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:52:10,353 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-05 05:52:10,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:52:10,551 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 05:52:10,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736676107] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:52:10,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:52:10,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 10] total 20 [2022-04-05 05:52:10,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421301856] [2022-04-05 05:52:10,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:52:10,552 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-05 05:52:10,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:52:10,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-05 05:52:10,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-04-05 05:52:10,553 INFO L87 Difference]: Start difference. First operand 56 states and 74 transitions. Second operand has 20 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:12,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:52:12,139 INFO L93 Difference]: Finished difference Result 133 states and 188 transitions. [2022-04-05 05:52:12,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-05 05:52:12,139 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-04-05 05:52:12,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:52:12,140 INFO L225 Difference]: With dead ends: 133 [2022-04-05 05:52:12,140 INFO L226 Difference]: Without dead ends: 94 [2022-04-05 05:52:12,142 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=518, Invalid=3022, Unknown=0, NotChecked=0, Total=3540 [2022-04-05 05:52:12,142 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 75 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-05 05:52:12,143 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 96 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-05 05:52:12,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-04-05 05:52:12,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 73. [2022-04-05 05:52:12,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.411764705882353) internal successors, (96), 68 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:12,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 100 transitions. [2022-04-05 05:52:12,151 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 100 transitions. Word has length 24 [2022-04-05 05:52:12,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:52:12,151 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 100 transitions. [2022-04-05 05:52:12,151 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:12,151 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 100 transitions. [2022-04-05 05:52:12,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-05 05:52:12,152 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:52:12,152 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:52:12,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-05 05:52:12,374 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-05 05:52:12,374 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:52:12,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:52:12,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1576992246, now seen corresponding path program 4 times [2022-04-05 05:52:12,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:52:12,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078922584] [2022-04-05 05:52:12,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:52:12,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:52:12,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:12,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:52:12,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:12,460 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-05 05:52:12,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:52:12,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078922584] [2022-04-05 05:52:12,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078922584] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:52:12,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672279996] [2022-04-05 05:52:12,460 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 05:52:12,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:52:12,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:52:12,462 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:52:12,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-05 05:52:12,501 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 05:52:12,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:52:12,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-05 05:52:12,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:52:12,562 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-05 05:52:12,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:52:12,617 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-05 05:52:12,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672279996] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:52:12,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:52:12,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-04-05 05:52:12,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517433783] [2022-04-05 05:52:12,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:52:12,618 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 05:52:12,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:52:12,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 05:52:12,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-05 05:52:12,619 INFO L87 Difference]: Start difference. First operand 73 states and 100 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:12,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:52:12,728 INFO L93 Difference]: Finished difference Result 88 states and 118 transitions. [2022-04-05 05:52:12,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-05 05:52:12,728 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 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 25 [2022-04-05 05:52:12,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:52:12,729 INFO L225 Difference]: With dead ends: 88 [2022-04-05 05:52:12,729 INFO L226 Difference]: Without dead ends: 75 [2022-04-05 05:52:12,729 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-04-05 05:52:12,730 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 05:52:12,730 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 35 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 05:52:12,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-04-05 05:52:12,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-04-05 05:52:12,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.3857142857142857) internal successors, (97), 70 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:12,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 101 transitions. [2022-04-05 05:52:12,738 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 101 transitions. Word has length 25 [2022-04-05 05:52:12,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:52:12,738 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 101 transitions. [2022-04-05 05:52:12,738 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:12,739 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 101 transitions. [2022-04-05 05:52:12,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-05 05:52:12,739 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:52:12,739 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:52:12,759 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-04-05 05:52:12,955 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-04-05 05:52:12,955 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:52:12,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:52:12,956 INFO L85 PathProgramCache]: Analyzing trace with hash 504396842, now seen corresponding path program 3 times [2022-04-05 05:52:12,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:52:12,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943075513] [2022-04-05 05:52:12,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:52:12,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:52:12,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:13,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:52:13,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:13,077 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 05:52:13,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:52:13,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943075513] [2022-04-05 05:52:13,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943075513] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:52:13,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558032955] [2022-04-05 05:52:13,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 05:52:13,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:52:13,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:52:13,079 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:52:13,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-05 05:52:13,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-04-05 05:52:13,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:52:13,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-05 05:52:13,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:52:13,232 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-05 05:52:13,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:52:13,277 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-05 05:52:13,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558032955] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:52:13,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:52:13,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 6] total 16 [2022-04-05 05:52:13,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676015836] [2022-04-05 05:52:13,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:52:13,278 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-05 05:52:13,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:52:13,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-05 05:52:13,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2022-04-05 05:52:13,278 INFO L87 Difference]: Start difference. First operand 75 states and 101 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:14,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:52:14,379 INFO L93 Difference]: Finished difference Result 155 states and 224 transitions. [2022-04-05 05:52:14,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-05 05:52:14,379 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 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 25 [2022-04-05 05:52:14,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:52:14,380 INFO L225 Difference]: With dead ends: 155 [2022-04-05 05:52:14,380 INFO L226 Difference]: Without dead ends: 126 [2022-04-05 05:52:14,381 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=363, Invalid=2187, Unknown=0, NotChecked=0, Total=2550 [2022-04-05 05:52:14,382 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 109 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 05:52:14,382 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 85 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 05:52:14,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-04-05 05:52:14,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 98. [2022-04-05 05:52:14,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 93 states have (on average 1.3440860215053763) internal successors, (125), 93 states have internal predecessors, (125), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:14,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 129 transitions. [2022-04-05 05:52:14,392 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 129 transitions. Word has length 25 [2022-04-05 05:52:14,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:52:14,392 INFO L478 AbstractCegarLoop]: Abstraction has 98 states and 129 transitions. [2022-04-05 05:52:14,392 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 15 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:14,393 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 129 transitions. [2022-04-05 05:52:14,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-05 05:52:14,393 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:52:14,393 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:52:14,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-05 05:52:14,611 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-04-05 05:52:14,612 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:52:14,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:52:14,612 INFO L85 PathProgramCache]: Analyzing trace with hash 681498865, now seen corresponding path program 3 times [2022-04-05 05:52:14,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:52:14,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063759950] [2022-04-05 05:52:14,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:52:14,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:52:14,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:14,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:52:14,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:14,760 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-05 05:52:14,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:52:14,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063759950] [2022-04-05 05:52:14,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063759950] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:52:14,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781225351] [2022-04-05 05:52:14,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 05:52:14,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:52:14,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:52:14,762 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:52:14,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-05 05:52:14,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-04-05 05:52:14,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:52:14,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-05 05:52:14,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:52:14,908 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-05 05:52:14,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:52:14,966 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-05 05:52:14,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781225351] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:52:14,967 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:52:14,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 6] total 16 [2022-04-05 05:52:14,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472203953] [2022-04-05 05:52:14,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:52:14,969 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-05 05:52:14,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:52:14,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-05 05:52:14,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2022-04-05 05:52:14,969 INFO L87 Difference]: Start difference. First operand 98 states and 129 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:16,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:52:16,044 INFO L93 Difference]: Finished difference Result 133 states and 183 transitions. [2022-04-05 05:52:16,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-04-05 05:52:16,045 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 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 26 [2022-04-05 05:52:16,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:52:16,045 INFO L225 Difference]: With dead ends: 133 [2022-04-05 05:52:16,045 INFO L226 Difference]: Without dead ends: 106 [2022-04-05 05:52:16,046 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=489, Invalid=3051, Unknown=0, NotChecked=0, Total=3540 [2022-04-05 05:52:16,047 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 79 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 05:52:16,047 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 72 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 05:52:16,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-04-05 05:52:16,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2022-04-05 05:52:16,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.3048780487804879) internal successors, (107), 82 states have internal predecessors, (107), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:16,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 111 transitions. [2022-04-05 05:52:16,056 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 111 transitions. Word has length 26 [2022-04-05 05:52:16,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:52:16,056 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 111 transitions. [2022-04-05 05:52:16,057 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:16,057 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 111 transitions. [2022-04-05 05:52:16,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-05 05:52:16,057 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:52:16,057 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:52:16,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-05 05:52:16,259 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-05 05:52:16,259 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:52:16,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:52:16,260 INFO L85 PathProgramCache]: Analyzing trace with hash -256423350, now seen corresponding path program 5 times [2022-04-05 05:52:16,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:52:16,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301053797] [2022-04-05 05:52:16,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:52:16,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:52:16,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:16,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:52:16,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:16,331 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-05 05:52:16,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:52:16,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301053797] [2022-04-05 05:52:16,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301053797] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:52:16,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406027156] [2022-04-05 05:52:16,332 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 05:52:16,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:52:16,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:52:16,333 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:52:16,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-05 05:52:16,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-04-05 05:52:16,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:52:16,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-05 05:52:16,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:52:16,456 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-05 05:52:16,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:52:16,503 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-05 05:52:16,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406027156] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:52:16,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:52:16,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-04-05 05:52:16,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299798077] [2022-04-05 05:52:16,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:52:16,504 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 05:52:16,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:52:16,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 05:52:16,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-05 05:52:16,504 INFO L87 Difference]: Start difference. First operand 87 states and 111 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:16,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:52:16,581 INFO L93 Difference]: Finished difference Result 110 states and 141 transitions. [2022-04-05 05:52:16,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 05:52:16,581 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 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 27 [2022-04-05 05:52:16,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:52:16,584 INFO L225 Difference]: With dead ends: 110 [2022-04-05 05:52:16,584 INFO L226 Difference]: Without dead ends: 85 [2022-04-05 05:52:16,584 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-04-05 05:52:16,585 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 22 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 05:52:16,585 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 35 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 05:52:16,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-04-05 05:52:16,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-04-05 05:52:16,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.3125) internal successors, (105), 80 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:16,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 109 transitions. [2022-04-05 05:52:16,606 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 109 transitions. Word has length 27 [2022-04-05 05:52:16,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:52:16,607 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 109 transitions. [2022-04-05 05:52:16,607 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:16,607 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 109 transitions. [2022-04-05 05:52:16,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-05 05:52:16,608 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:52:16,608 INFO L499 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:52:16,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-05 05:52:16,831 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-05 05:52:16,832 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:52:16,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:52:16,832 INFO L85 PathProgramCache]: Analyzing trace with hash 399846058, now seen corresponding path program 6 times [2022-04-05 05:52:16,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:52:16,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911979108] [2022-04-05 05:52:16,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:52:16,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:52:16,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:16,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:52:16,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:16,952 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-05 05:52:16,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:52:16,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911979108] [2022-04-05 05:52:16,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911979108] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:52:16,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894854708] [2022-04-05 05:52:16,953 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 05:52:16,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:52:16,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:52:16,955 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:52:16,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-05 05:52:16,992 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-05 05:52:16,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:52:16,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-05 05:52:16,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:52:17,067 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-04-05 05:52:17,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:52:17,151 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-04-05 05:52:17,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894854708] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:52:17,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:52:17,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 6] total 18 [2022-04-05 05:52:17,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576493994] [2022-04-05 05:52:17,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:52:17,152 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-05 05:52:17,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:52:17,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-05 05:52:17,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-04-05 05:52:17,153 INFO L87 Difference]: Start difference. First operand 85 states and 109 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:17,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:52:17,821 INFO L93 Difference]: Finished difference Result 185 states and 258 transitions. [2022-04-05 05:52:17,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-05 05:52:17,822 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 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 27 [2022-04-05 05:52:17,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:52:17,823 INFO L225 Difference]: With dead ends: 185 [2022-04-05 05:52:17,823 INFO L226 Difference]: Without dead ends: 151 [2022-04-05 05:52:17,824 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=352, Invalid=1370, Unknown=0, NotChecked=0, Total=1722 [2022-04-05 05:52:17,824 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 121 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 05:52:17,824 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 74 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 05:52:17,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-04-05 05:52:17,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 88. [2022-04-05 05:52:17,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.2650602409638554) internal successors, (105), 83 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:17,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2022-04-05 05:52:17,835 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 27 [2022-04-05 05:52:17,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:52:17,835 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2022-04-05 05:52:17,835 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:17,835 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2022-04-05 05:52:17,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-05 05:52:17,836 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:52:17,836 INFO L499 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:52:17,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-05 05:52:18,059 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:52:18,059 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:52:18,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:52:18,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1567225004, now seen corresponding path program 4 times [2022-04-05 05:52:18,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:52:18,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729059798] [2022-04-05 05:52:18,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:52:18,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:52:18,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:18,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:52:18,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:18,192 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 05:52:18,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:52:18,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729059798] [2022-04-05 05:52:18,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729059798] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:52:18,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060156395] [2022-04-05 05:52:18,193 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 05:52:18,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:52:18,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:52:18,200 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:52:18,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-05 05:52:18,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 05:52:18,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:52:18,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-05 05:52:18,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:52:18,317 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 05:52:18,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:52:18,505 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 05:52:18,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060156395] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:52:18,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:52:18,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 24 [2022-04-05 05:52:18,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062016477] [2022-04-05 05:52:18,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:52:18,506 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-05 05:52:18,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:52:18,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-05 05:52:18,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2022-04-05 05:52:18,507 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:29,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:52:29,759 INFO L93 Difference]: Finished difference Result 382 states and 535 transitions. [2022-04-05 05:52:29,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-04-05 05:52:29,760 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 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 28 [2022-04-05 05:52:29,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:52:29,761 INFO L225 Difference]: With dead ends: 382 [2022-04-05 05:52:29,761 INFO L226 Difference]: Without dead ends: 343 [2022-04-05 05:52:29,769 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11603 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=5490, Invalid=21570, Unknown=0, NotChecked=0, Total=27060 [2022-04-05 05:52:29,770 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 376 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 623 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 1460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 623 IncrementalHoareTripleChecker+Valid, 837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-05 05:52:29,770 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 104 Invalid, 1460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [623 Valid, 837 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-05 05:52:29,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-04-05 05:52:29,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 108. [2022-04-05 05:52:29,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 103 states have (on average 1.3106796116504855) internal successors, (135), 103 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:29,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 139 transitions. [2022-04-05 05:52:29,793 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 139 transitions. Word has length 28 [2022-04-05 05:52:29,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:52:29,793 INFO L478 AbstractCegarLoop]: Abstraction has 108 states and 139 transitions. [2022-04-05 05:52:29,793 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 23 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:29,793 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 139 transitions. [2022-04-05 05:52:29,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-05 05:52:29,793 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:52:29,794 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:52:29,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-05 05:52:29,994 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:52:29,994 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:52:29,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:52:29,995 INFO L85 PathProgramCache]: Analyzing trace with hash 408042245, now seen corresponding path program 4 times [2022-04-05 05:52:29,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:52:29,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686633845] [2022-04-05 05:52:29,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:52:29,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:52:30,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:30,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:52:30,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:30,142 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:52:30,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:52:30,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686633845] [2022-04-05 05:52:30,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686633845] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:52:30,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585716330] [2022-04-05 05:52:30,143 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 05:52:30,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:52:30,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:52:30,148 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:52:30,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-05 05:52:30,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 05:52:30,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:52:30,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-05 05:52:30,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:52:30,290 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-05 05:52:30,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:52:30,335 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-05 05:52:30,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585716330] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:52:30,335 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:52:30,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7, 7] total 19 [2022-04-05 05:52:30,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020119180] [2022-04-05 05:52:30,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:52:30,336 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-05 05:52:30,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:52:30,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-05 05:52:30,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2022-04-05 05:52:30,336 INFO L87 Difference]: Start difference. First operand 108 states and 139 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:32,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:52:32,592 INFO L93 Difference]: Finished difference Result 177 states and 245 transitions. [2022-04-05 05:52:32,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-04-05 05:52:32,592 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-04-05 05:52:32,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:52:32,593 INFO L225 Difference]: With dead ends: 177 [2022-04-05 05:52:32,594 INFO L226 Difference]: Without dead ends: 158 [2022-04-05 05:52:32,595 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1529 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=710, Invalid=4840, Unknown=0, NotChecked=0, Total=5550 [2022-04-05 05:52:32,596 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 116 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-05 05:52:32,596 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 87 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 817 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-05 05:52:32,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-04-05 05:52:32,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 123. [2022-04-05 05:52:32,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.2966101694915255) internal successors, (153), 118 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:32,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 157 transitions. [2022-04-05 05:52:32,613 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 157 transitions. Word has length 29 [2022-04-05 05:52:32,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:52:32,613 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 157 transitions. [2022-04-05 05:52:32,613 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:32,614 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 157 transitions. [2022-04-05 05:52:32,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-05 05:52:32,614 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:52:32,614 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:52:32,631 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-04-05 05:52:32,818 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:52:32,819 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:52:32,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:52:32,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1025963572, now seen corresponding path program 7 times [2022-04-05 05:52:32,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:52:32,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771422763] [2022-04-05 05:52:32,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:52:32,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:52:32,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:32,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:52:32,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:32,928 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-05 05:52:32,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:52:32,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771422763] [2022-04-05 05:52:32,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771422763] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:52:32,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110246684] [2022-04-05 05:52:32,929 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 05:52:32,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:52:32,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:52:32,930 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:52:32,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-05 05:52:32,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:32,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-05 05:52:32,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:52:33,054 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-05 05:52:33,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:52:33,132 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-05 05:52:33,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110246684] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:52:33,132 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:52:33,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-04-05 05:52:33,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350947354] [2022-04-05 05:52:33,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:52:33,133 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-05 05:52:33,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:52:33,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-05 05:52:33,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-04-05 05:52:33,134 INFO L87 Difference]: Start difference. First operand 123 states and 157 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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 05:52:33,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:52:33,307 INFO L93 Difference]: Finished difference Result 137 states and 174 transitions. [2022-04-05 05:52:33,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-05 05:52:33,309 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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 30 [2022-04-05 05:52:33,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:52:33,310 INFO L225 Difference]: With dead ends: 137 [2022-04-05 05:52:33,310 INFO L226 Difference]: Without dead ends: 124 [2022-04-05 05:52:33,310 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-04-05 05:52:33,310 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 31 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 05:52:33,311 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 42 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 05:52:33,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-04-05 05:52:33,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-04-05 05:52:33,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.2857142857142858) internal successors, (153), 119 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:33,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 157 transitions. [2022-04-05 05:52:33,329 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 157 transitions. Word has length 30 [2022-04-05 05:52:33,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:52:33,329 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 157 transitions. [2022-04-05 05:52:33,329 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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 05:52:33,329 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 157 transitions. [2022-04-05 05:52:33,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-05 05:52:33,329 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:52:33,329 INFO L499 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:52:33,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-05 05:52:33,553 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:52:33,553 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:52:33,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:52:33,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1105068913, now seen corresponding path program 5 times [2022-04-05 05:52:33,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:52:33,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754183116] [2022-04-05 05:52:33,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:52:33,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:52:33,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:33,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:52:33,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:33,738 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-05 05:52:33,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:52:33,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754183116] [2022-04-05 05:52:33,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754183116] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:52:33,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413006499] [2022-04-05 05:52:33,739 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 05:52:33,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:52:33,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:52:33,740 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:52:33,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-05 05:52:33,996 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-04-05 05:52:33,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:52:33,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-05 05:52:33,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:52:34,111 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-05 05:52:34,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:52:34,162 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-05 05:52:34,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413006499] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:52:34,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:52:34,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 7, 7] total 21 [2022-04-05 05:52:34,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404800170] [2022-04-05 05:52:34,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:52:34,162 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-05 05:52:34,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:52:34,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-05 05:52:34,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2022-04-05 05:52:34,163 INFO L87 Difference]: Start difference. First operand 124 states and 157 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:36,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:52:36,419 INFO L93 Difference]: Finished difference Result 240 states and 320 transitions. [2022-04-05 05:52:36,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-04-05 05:52:36,419 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 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 31 [2022-04-05 05:52:36,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:52:36,420 INFO L225 Difference]: With dead ends: 240 [2022-04-05 05:52:36,420 INFO L226 Difference]: Without dead ends: 209 [2022-04-05 05:52:36,422 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2053 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=726, Invalid=6414, Unknown=0, NotChecked=0, Total=7140 [2022-04-05 05:52:36,423 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 154 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1144 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 1144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-05 05:52:36,423 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 106 Invalid, 1384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 1144 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-05 05:52:36,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-04-05 05:52:36,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 134. [2022-04-05 05:52:36,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 129 states have (on average 1.2713178294573644) internal successors, (164), 129 states have internal predecessors, (164), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:36,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 168 transitions. [2022-04-05 05:52:36,445 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 168 transitions. Word has length 31 [2022-04-05 05:52:36,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:52:36,446 INFO L478 AbstractCegarLoop]: Abstraction has 134 states and 168 transitions. [2022-04-05 05:52:36,446 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:36,446 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 168 transitions. [2022-04-05 05:52:36,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-05 05:52:36,446 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:52:36,446 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:52:36,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-04-05 05:52:36,651 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:52:36,651 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:52:36,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:52:36,652 INFO L85 PathProgramCache]: Analyzing trace with hash 179018828, now seen corresponding path program 8 times [2022-04-05 05:52:36,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:52:36,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959904277] [2022-04-05 05:52:36,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:52:36,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:52:36,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:36,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:52:36,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:36,743 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-04-05 05:52:36,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:52:36,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959904277] [2022-04-05 05:52:36,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959904277] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:52:36,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49766636] [2022-04-05 05:52:36,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 05:52:36,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:52:36,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:52:36,744 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:52:36,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-05 05:52:36,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 05:52:36,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:52:36,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-05 05:52:36,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:52:36,832 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-04-05 05:52:36,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:52:36,893 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-04-05 05:52:36,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49766636] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:52:36,893 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:52:36,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-04-05 05:52:36,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883191122] [2022-04-05 05:52:36,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:52:36,894 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-05 05:52:36,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:52:36,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-05 05:52:36,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-04-05 05:52:36,894 INFO L87 Difference]: Start difference. First operand 134 states and 168 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:36,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:52:36,997 INFO L93 Difference]: Finished difference Result 146 states and 182 transitions. [2022-04-05 05:52:36,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-05 05:52:36,997 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 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 32 [2022-04-05 05:52:36,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:52:36,998 INFO L225 Difference]: With dead ends: 146 [2022-04-05 05:52:36,998 INFO L226 Difference]: Without dead ends: 121 [2022-04-05 05:52:36,998 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-04-05 05:52:36,999 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 23 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 05:52:36,999 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 44 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 05:52:36,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-04-05 05:52:37,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-04-05 05:52:37,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.2844827586206897) internal successors, (149), 116 states have internal predecessors, (149), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:37,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 153 transitions. [2022-04-05 05:52:37,020 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 153 transitions. Word has length 32 [2022-04-05 05:52:37,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:52:37,020 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 153 transitions. [2022-04-05 05:52:37,020 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:37,020 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 153 transitions. [2022-04-05 05:52:37,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-05 05:52:37,021 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:52:37,021 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:52:37,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-05 05:52:37,233 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:52:37,234 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:52:37,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:52:37,234 INFO L85 PathProgramCache]: Analyzing trace with hash 28691148, now seen corresponding path program 5 times [2022-04-05 05:52:37,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:52:37,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652436172] [2022-04-05 05:52:37,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:52:37,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:52:37,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:37,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:52:37,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:37,433 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:52:37,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:52:37,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652436172] [2022-04-05 05:52:37,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652436172] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:52:37,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663857076] [2022-04-05 05:52:37,434 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 05:52:37,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:52:37,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:52:37,435 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:52:37,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-05 05:52:37,610 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-04-05 05:52:37,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:52:37,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-05 05:52:37,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:52:37,744 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-05 05:52:37,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:52:37,793 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-05 05:52:37,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663857076] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:52:37,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:52:37,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 8] total 22 [2022-04-05 05:52:37,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024306155] [2022-04-05 05:52:37,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:52:37,794 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-05 05:52:37,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:52:37,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-05 05:52:37,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2022-04-05 05:52:37,795 INFO L87 Difference]: Start difference. First operand 121 states and 153 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:42,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:52:42,727 INFO L93 Difference]: Finished difference Result 223 states and 305 transitions. [2022-04-05 05:52:42,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-04-05 05:52:42,728 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 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 32 [2022-04-05 05:52:42,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:52:42,729 INFO L225 Difference]: With dead ends: 223 [2022-04-05 05:52:42,729 INFO L226 Difference]: Without dead ends: 203 [2022-04-05 05:52:42,731 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2590 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1028, Invalid=7902, Unknown=0, NotChecked=0, Total=8930 [2022-04-05 05:52:42,731 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 145 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1418 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 1418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-05 05:52:42,732 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 117 Invalid, 1695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 1418 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-05 05:52:42,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-04-05 05:52:42,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 146. [2022-04-05 05:52:42,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 141 states have (on average 1.2624113475177305) internal successors, (178), 141 states have internal predecessors, (178), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:42,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 182 transitions. [2022-04-05 05:52:42,754 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 182 transitions. Word has length 32 [2022-04-05 05:52:42,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:52:42,754 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 182 transitions. [2022-04-05 05:52:42,754 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:42,754 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 182 transitions. [2022-04-05 05:52:42,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-05 05:52:42,755 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:52:42,755 INFO L499 BasicCegarLoop]: trace histogram [8, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:52:42,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-05 05:52:42,959 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-04-05 05:52:42,959 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:52:42,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:52:42,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1317090289, now seen corresponding path program 6 times [2022-04-05 05:52:42,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:52:42,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806632259] [2022-04-05 05:52:42,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:52:42,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:52:42,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:43,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:52:43,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:43,156 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 05:52:43,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:52:43,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806632259] [2022-04-05 05:52:43,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806632259] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:52:43,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263259823] [2022-04-05 05:52:43,156 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 05:52:43,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:52:43,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:52:43,157 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:52:43,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-05 05:52:43,232 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-05 05:52:43,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:52:43,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-05 05:52:43,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:52:43,338 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 05:52:43,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:52:43,549 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 05:52:43,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263259823] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:52:43,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:52:43,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 11] total 25 [2022-04-05 05:52:43,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822248978] [2022-04-05 05:52:43,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:52:43,552 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-05 05:52:43,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:52:43,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-05 05:52:43,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2022-04-05 05:52:43,554 INFO L87 Difference]: Start difference. First operand 146 states and 182 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:53,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:52:53,716 INFO L93 Difference]: Finished difference Result 727 states and 998 transitions. [2022-04-05 05:52:53,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-04-05 05:52:53,722 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 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 33 [2022-04-05 05:52:53,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:52:53,725 INFO L225 Difference]: With dead ends: 727 [2022-04-05 05:52:53,725 INFO L226 Difference]: Without dead ends: 697 [2022-04-05 05:52:53,726 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4703 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=3039, Invalid=9843, Unknown=0, NotChecked=0, Total=12882 [2022-04-05 05:52:53,727 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 703 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 697 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 703 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 697 IncrementalHoareTripleChecker+Valid, 1076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-04-05 05:52:53,727 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [703 Valid, 114 Invalid, 1773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [697 Valid, 1076 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-04-05 05:52:53,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2022-04-05 05:52:53,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 202. [2022-04-05 05:52:53,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 197 states have (on average 1.2791878172588833) internal successors, (252), 197 states have internal predecessors, (252), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:53,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 256 transitions. [2022-04-05 05:52:53,763 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 256 transitions. Word has length 33 [2022-04-05 05:52:53,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:52:53,763 INFO L478 AbstractCegarLoop]: Abstraction has 202 states and 256 transitions. [2022-04-05 05:52:53,764 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:53,764 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 256 transitions. [2022-04-05 05:52:53,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-05 05:52:53,764 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:52:53,764 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:52:53,787 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-04-05 05:52:53,979 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-04-05 05:52:53,979 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:52:53,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:52:53,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1824944628, now seen corresponding path program 9 times [2022-04-05 05:52:53,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:52:53,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629289218] [2022-04-05 05:52:53,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:52:53,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:52:54,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:54,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:52:54,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:54,115 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-05 05:52:54,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:52:54,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629289218] [2022-04-05 05:52:54,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629289218] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:52:54,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517159975] [2022-04-05 05:52:54,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 05:52:54,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:52:54,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:52:54,117 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:52:54,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-05 05:52:54,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-04-05 05:52:54,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:52:54,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-05 05:52:54,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:52:54,278 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-04-05 05:52:54,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:52:54,336 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-04-05 05:52:54,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517159975] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:52:54,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:52:54,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 15 [2022-04-05 05:52:54,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583303882] [2022-04-05 05:52:54,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:52:54,337 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-05 05:52:54,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:52:54,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-05 05:52:54,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2022-04-05 05:52:54,337 INFO L87 Difference]: Start difference. First operand 202 states and 256 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:54,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:52:54,802 INFO L93 Difference]: Finished difference Result 326 states and 431 transitions. [2022-04-05 05:52:54,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-05 05:52:54,802 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 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 34 [2022-04-05 05:52:54,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:52:54,803 INFO L225 Difference]: With dead ends: 326 [2022-04-05 05:52:54,804 INFO L226 Difference]: Without dead ends: 309 [2022-04-05 05:52:54,804 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=245, Invalid=685, Unknown=0, NotChecked=0, Total=930 [2022-04-05 05:52:54,805 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 111 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 05:52:54,805 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 55 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 05:52:54,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-04-05 05:52:54,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 268. [2022-04-05 05:52:54,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 263 states have (on average 1.3231939163498099) internal successors, (348), 263 states have internal predecessors, (348), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:54,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 352 transitions. [2022-04-05 05:52:54,845 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 352 transitions. Word has length 34 [2022-04-05 05:52:54,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:52:54,845 INFO L478 AbstractCegarLoop]: Abstraction has 268 states and 352 transitions. [2022-04-05 05:52:54,845 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:52:54,846 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 352 transitions. [2022-04-05 05:52:54,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-05 05:52:54,846 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:52:54,846 INFO L499 BasicCegarLoop]: trace histogram [9, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:52:54,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-04-05 05:52:55,059 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-04-05 05:52:55,059 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:52:55,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:52:55,060 INFO L85 PathProgramCache]: Analyzing trace with hash 145125386, now seen corresponding path program 7 times [2022-04-05 05:52:55,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:52:55,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432979426] [2022-04-05 05:52:55,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:52:55,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:52:55,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:55,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:52:55,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:55,273 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-05 05:52:55,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:52:55,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432979426] [2022-04-05 05:52:55,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432979426] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:52:55,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236531632] [2022-04-05 05:52:55,274 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 05:52:55,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:52:55,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:52:55,275 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:52:55,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-05 05:52:55,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:52:55,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-05 05:52:55,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:52:55,441 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-05 05:52:55,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:52:55,740 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-05 05:52:55,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236531632] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:52:55,740 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:52:55,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-04-05 05:52:55,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545454343] [2022-04-05 05:52:55,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:52:55,741 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-05 05:52:55,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:52:55,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-05 05:52:55,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2022-04-05 05:52:55,741 INFO L87 Difference]: Start difference. First operand 268 states and 352 transitions. Second operand has 32 states, 32 states have (on average 1.40625) internal successors, (45), 31 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:54:29,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:54:29,525 INFO L93 Difference]: Finished difference Result 1037 states and 1462 transitions. [2022-04-05 05:54:29,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 327 states. [2022-04-05 05:54:29,527 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.40625) internal successors, (45), 31 states have internal predecessors, (45), 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 35 [2022-04-05 05:54:29,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:54:29,529 INFO L225 Difference]: With dead ends: 1037 [2022-04-05 05:54:29,530 INFO L226 Difference]: Without dead ends: 963 [2022-04-05 05:54:29,537 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 354 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60520 ImplicationChecksByTransitivity, 88.2s TimeCoverageRelationStatistics Valid=21899, Invalid=104481, Unknown=0, NotChecked=0, Total=126380 [2022-04-05 05:54:29,538 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 885 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1949 mSolverCounterSat, 1669 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 885 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 3618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1669 IncrementalHoareTripleChecker+Valid, 1949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-04-05 05:54:29,538 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [885 Valid, 135 Invalid, 3618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1669 Valid, 1949 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-04-05 05:54:29,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2022-04-05 05:54:29,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 308. [2022-04-05 05:54:29,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 303 states have (on average 1.33003300330033) internal successors, (403), 303 states have internal predecessors, (403), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:54:29,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 407 transitions. [2022-04-05 05:54:29,584 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 407 transitions. Word has length 35 [2022-04-05 05:54:29,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:54:29,585 INFO L478 AbstractCegarLoop]: Abstraction has 308 states and 407 transitions. [2022-04-05 05:54:29,585 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.40625) internal successors, (45), 31 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:54:29,585 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 407 transitions. [2022-04-05 05:54:29,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-05 05:54:29,585 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:54:29,586 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:54:29,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-04-05 05:54:29,799 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:54:29,799 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:54:29,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:54:29,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1440953804, now seen corresponding path program 10 times [2022-04-05 05:54:29,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:54:29,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000968954] [2022-04-05 05:54:29,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:54:29,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:54:29,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:54:29,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:54:29,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:54:29,933 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-05 05:54:29,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:54:29,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000968954] [2022-04-05 05:54:29,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000968954] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:54:29,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867794062] [2022-04-05 05:54:29,934 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 05:54:29,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:54:29,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:54:29,935 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:54:29,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-04-05 05:54:29,981 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 05:54:29,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:54:29,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 48 conjunts are in the unsatisfiable core [2022-04-05 05:54:29,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:54:30,229 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:54:30,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:54:30,487 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-05 05:54:30,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867794062] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:54:30,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:54:30,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 14] total 28 [2022-04-05 05:54:30,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744145027] [2022-04-05 05:54:30,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:54:30,488 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-05 05:54:30,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:54:30,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-05 05:54:30,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2022-04-05 05:54:30,489 INFO L87 Difference]: Start difference. First operand 308 states and 407 transitions. Second operand has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 25 states have internal predecessors, (64), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:54:32,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:54:32,035 INFO L93 Difference]: Finished difference Result 385 states and 506 transitions. [2022-04-05 05:54:32,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-05 05:54:32,035 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 25 states have internal predecessors, (64), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-04-05 05:54:32,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:54:32,036 INFO L225 Difference]: With dead ends: 385 [2022-04-05 05:54:32,036 INFO L226 Difference]: Without dead ends: 339 [2022-04-05 05:54:32,037 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 67 SyntacticMatches, 6 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=472, Invalid=3434, Unknown=0, NotChecked=0, Total=3906 [2022-04-05 05:54:32,037 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 53 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 803 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-05 05:54:32,037 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 111 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 803 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-05 05:54:32,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-04-05 05:54:32,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 290. [2022-04-05 05:54:32,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 285 states have (on average 1.3543859649122807) internal successors, (386), 285 states have internal predecessors, (386), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:54:32,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 390 transitions. [2022-04-05 05:54:32,074 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 390 transitions. Word has length 36 [2022-04-05 05:54:32,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:54:32,075 INFO L478 AbstractCegarLoop]: Abstraction has 290 states and 390 transitions. [2022-04-05 05:54:32,075 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 25 states have internal predecessors, (64), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:54:32,075 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 390 transitions. [2022-04-05 05:54:32,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-05 05:54:32,075 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:54:32,075 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:54:32,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-04-05 05:54:32,276 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-04-05 05:54:32,276 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:54:32,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:54:32,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1291441514, now seen corresponding path program 8 times [2022-04-05 05:54:32,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:54:32,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275925272] [2022-04-05 05:54:32,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:54:32,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:54:32,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:54:32,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:54:32,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:54:32,518 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-05 05:54:32,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:54:32,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275925272] [2022-04-05 05:54:32,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275925272] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:54:32,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603234228] [2022-04-05 05:54:32,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 05:54:32,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:54:32,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:54:32,520 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:54:32,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-04-05 05:54:32,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 05:54:32,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:54:32,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-05 05:54:32,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:54:32,768 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-04-05 05:54:32,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:54:32,822 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-04-05 05:54:32,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603234228] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:54:32,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:54:32,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9, 9] total 25 [2022-04-05 05:54:32,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741958709] [2022-04-05 05:54:32,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:54:32,823 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-05 05:54:32,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:54:32,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-05 05:54:32,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=552, Unknown=0, NotChecked=0, Total=600 [2022-04-05 05:54:32,824 INFO L87 Difference]: Start difference. First operand 290 states and 390 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:54:41,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:54:41,160 INFO L93 Difference]: Finished difference Result 455 states and 609 transitions. [2022-04-05 05:54:41,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-04-05 05:54:41,160 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 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 37 [2022-04-05 05:54:41,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:54:41,161 INFO L225 Difference]: With dead ends: 455 [2022-04-05 05:54:41,162 INFO L226 Difference]: Without dead ends: 394 [2022-04-05 05:54:41,163 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4540 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=1486, Invalid=13034, Unknown=0, NotChecked=0, Total=14520 [2022-04-05 05:54:41,163 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 135 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1764 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 2094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 1764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-05 05:54:41,163 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 130 Invalid, 2094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 1764 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-05 05:54:41,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-04-05 05:54:41,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 327. [2022-04-05 05:54:41,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 322 states have (on average 1.31055900621118) internal successors, (422), 322 states have internal predecessors, (422), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:54:41,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 426 transitions. [2022-04-05 05:54:41,205 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 426 transitions. Word has length 37 [2022-04-05 05:54:41,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:54:41,205 INFO L478 AbstractCegarLoop]: Abstraction has 327 states and 426 transitions. [2022-04-05 05:54:41,205 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:54:41,205 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 426 transitions. [2022-04-05 05:54:41,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-05 05:54:41,206 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:54:41,206 INFO L499 BasicCegarLoop]: trace histogram [10, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:54:41,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-04-05 05:54:41,406 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:54:41,407 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:54:41,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:54:41,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1823283916, now seen corresponding path program 9 times [2022-04-05 05:54:41,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:54:41,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459741938] [2022-04-05 05:54:41,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:54:41,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:54:41,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:54:41,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:54:41,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:54:41,639 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-04-05 05:54:41,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:54:41,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459741938] [2022-04-05 05:54:41,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459741938] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:54:41,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40123325] [2022-04-05 05:54:41,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 05:54:41,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:54:41,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:54:41,641 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:54:41,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-04-05 05:54:41,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-04-05 05:54:41,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:54:41,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-05 05:54:41,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:54:42,003 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-05 05:54:42,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:54:42,517 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-05 05:54:42,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40123325] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:54:42,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:54:42,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 17] total 43 [2022-04-05 05:54:42,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059294682] [2022-04-05 05:54:42,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:54:42,518 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-05 05:54:42,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:54:42,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-05 05:54:42,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1643, Unknown=0, NotChecked=0, Total=1806 [2022-04-05 05:54:42,518 INFO L87 Difference]: Start difference. First operand 327 states and 426 transitions. Second operand has 43 states, 42 states have (on average 1.619047619047619) internal successors, (68), 41 states have internal predecessors, (68), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:54:59,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:54:59,334 INFO L93 Difference]: Finished difference Result 775 states and 1082 transitions. [2022-04-05 05:54:59,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2022-04-05 05:54:59,335 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.619047619047619) internal successors, (68), 41 states have internal predecessors, (68), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-04-05 05:54:59,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:54:59,337 INFO L225 Difference]: With dead ends: 775 [2022-04-05 05:54:59,337 INFO L226 Difference]: Without dead ends: 687 [2022-04-05 05:54:59,339 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 62 SyntacticMatches, 4 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11926 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=3458, Invalid=35548, Unknown=0, NotChecked=0, Total=39006 [2022-04-05 05:54:59,339 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 254 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 5841 mSolverCounterSat, 987 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 6828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 987 IncrementalHoareTripleChecker+Valid, 5841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-04-05 05:54:59,339 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 187 Invalid, 6828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [987 Valid, 5841 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-04-05 05:54:59,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2022-04-05 05:54:59,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 406. [2022-04-05 05:54:59,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 401 states have (on average 1.3591022443890275) internal successors, (545), 401 states have internal predecessors, (545), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:54:59,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 549 transitions. [2022-04-05 05:54:59,408 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 549 transitions. Word has length 38 [2022-04-05 05:54:59,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:54:59,408 INFO L478 AbstractCegarLoop]: Abstraction has 406 states and 549 transitions. [2022-04-05 05:54:59,408 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.619047619047619) internal successors, (68), 41 states have internal predecessors, (68), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:54:59,408 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 549 transitions. [2022-04-05 05:54:59,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-05 05:54:59,409 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:54:59,409 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:54:59,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-04-05 05:54:59,631 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-04-05 05:54:59,631 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:54:59,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:54:59,631 INFO L85 PathProgramCache]: Analyzing trace with hash 2108423050, now seen corresponding path program 6 times [2022-04-05 05:54:59,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:54:59,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461646290] [2022-04-05 05:54:59,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:54:59,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:54:59,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:54:59,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:54:59,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:54:59,850 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-04-05 05:54:59,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:54:59,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461646290] [2022-04-05 05:54:59,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461646290] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:54:59,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511874016] [2022-04-05 05:54:59,851 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 05:54:59,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:54:59,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:54:59,852 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:54:59,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-04-05 05:54:59,967 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-05 05:54:59,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:54:59,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-05 05:54:59,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:55:00,080 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-04-05 05:55:00,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:55:00,471 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-04-05 05:55:00,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511874016] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:55:00,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:55:00,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2022-04-05 05:55:00,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167936863] [2022-04-05 05:55:00,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:55:00,472 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-05 05:55:00,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:55:00,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-05 05:55:00,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1131, Unknown=0, NotChecked=0, Total=1332 [2022-04-05 05:55:00,473 INFO L87 Difference]: Start difference. First operand 406 states and 549 transitions. Second operand has 37 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 36 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:56:01,803 WARN L232 SmtUtils]: Spent 5.65s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-05 05:59:18,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:59:18,491 INFO L93 Difference]: Finished difference Result 1424 states and 2126 transitions. [2022-04-05 05:59:18,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 606 states. [2022-04-05 05:59:18,491 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 36 states have internal predecessors, (51), 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 39 [2022-04-05 05:59:18,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:59:18,494 INFO L225 Difference]: With dead ends: 1424 [2022-04-05 05:59:18,494 INFO L226 Difference]: Without dead ends: 1284 [2022-04-05 05:59:18,513 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 700 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 638 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196303 ImplicationChecksByTransitivity, 236.9s TimeCoverageRelationStatistics Valid=44975, Invalid=363985, Unknown=0, NotChecked=0, Total=408960 [2022-04-05 05:59:18,514 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 1089 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 2621 mSolverCounterSat, 3155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1089 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 5776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3155 IncrementalHoareTripleChecker+Valid, 2621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.8s IncrementalHoareTripleChecker+Time [2022-04-05 05:59:18,514 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1089 Valid, 145 Invalid, 5776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3155 Valid, 2621 Invalid, 0 Unknown, 0 Unchecked, 20.8s Time] [2022-04-05 05:59:18,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2022-04-05 05:59:18,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 618. [2022-04-05 05:59:18,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 613 states have (on average 1.4143556280587275) internal successors, (867), 613 states have internal predecessors, (867), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:59:18,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 871 transitions. [2022-04-05 05:59:18,654 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 871 transitions. Word has length 39 [2022-04-05 05:59:18,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:59:18,654 INFO L478 AbstractCegarLoop]: Abstraction has 618 states and 871 transitions. [2022-04-05 05:59:18,654 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 36 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:59:18,654 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 871 transitions. [2022-04-05 05:59:18,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-05 05:59:18,655 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:59:18,655 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:59:18,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-04-05 05:59:18,871 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:59:18,871 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:59:18,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:59:18,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1179511284, now seen corresponding path program 11 times [2022-04-05 05:59:18,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:59:18,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903102032] [2022-04-05 05:59:18,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:59:18,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:59:18,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:59:19,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:59:19,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:59:19,007 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-05 05:59:19,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:59:19,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903102032] [2022-04-05 05:59:19,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903102032] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:59:19,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393651022] [2022-04-05 05:59:19,007 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 05:59:19,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:59:19,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:59:19,008 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:59:19,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-04-05 05:59:19,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-04-05 05:59:19,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:59:19,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-05 05:59:19,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:59:19,565 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-05 05:59:19,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:59:19,661 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-05 05:59:19,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393651022] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:59:19,662 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:59:19,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-04-05 05:59:19,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374870015] [2022-04-05 05:59:19,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:59:19,662 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-05 05:59:19,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:59:19,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-05 05:59:19,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-04-05 05:59:19,663 INFO L87 Difference]: Start difference. First operand 618 states and 871 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:59:20,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:59:20,662 INFO L93 Difference]: Finished difference Result 908 states and 1343 transitions. [2022-04-05 05:59:20,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-05 05:59:20,662 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 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 40 [2022-04-05 05:59:20,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:59:20,664 INFO L225 Difference]: With dead ends: 908 [2022-04-05 05:59:20,664 INFO L226 Difference]: Without dead ends: 797 [2022-04-05 05:59:20,665 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=339, Invalid=1067, Unknown=0, NotChecked=0, Total=1406 [2022-04-05 05:59:20,665 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 132 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 05:59:20,665 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 60 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 05:59:20,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-04-05 05:59:20,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 749. [2022-04-05 05:59:20,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 744 states have (on average 1.446236559139785) internal successors, (1076), 744 states have internal predecessors, (1076), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:59:20,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 1080 transitions. [2022-04-05 05:59:20,789 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 1080 transitions. Word has length 40 [2022-04-05 05:59:20,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:59:20,790 INFO L478 AbstractCegarLoop]: Abstraction has 749 states and 1080 transitions. [2022-04-05 05:59:20,790 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:59:20,790 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 1080 transitions. [2022-04-05 05:59:20,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-05 05:59:20,791 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:59:20,791 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:59:20,797 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-04-05 05:59:20,996 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:59:20,996 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:59:20,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:59:20,996 INFO L85 PathProgramCache]: Analyzing trace with hash 287258053, now seen corresponding path program 7 times [2022-04-05 05:59:20,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:59:20,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800126082] [2022-04-05 05:59:20,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:59:20,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:59:21,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:59:21,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:59:21,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:59:21,294 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:59:21,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:59:21,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800126082] [2022-04-05 05:59:21,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800126082] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:59:21,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000588634] [2022-04-05 05:59:21,295 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 05:59:21,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:59:21,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:59:21,295 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 05:59:21,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-04-05 05:59:21,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:59:21,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-05 05:59:21,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:59:21,604 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-04-05 05:59:21,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:59:21,668 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-04-05 05:59:21,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000588634] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:59:21,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:59:21,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 11, 11] total 31 [2022-04-05 05:59:21,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682771111] [2022-04-05 05:59:21,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:59:21,669 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-05 05:59:21,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:59:21,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-05 05:59:21,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=869, Unknown=0, NotChecked=0, Total=930 [2022-04-05 05:59:21,670 INFO L87 Difference]: Start difference. First operand 749 states and 1080 transitions. Second operand has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 06:00:16,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:00:16,049 INFO L93 Difference]: Finished difference Result 1062 states and 1539 transitions. [2022-04-05 06:00:16,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-04-05 06:00:16,049 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 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 41 [2022-04-05 06:00:16,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:00:16,051 INFO L225 Difference]: With dead ends: 1062 [2022-04-05 06:00:16,051 INFO L226 Difference]: Without dead ends: 941 [2022-04-05 06:00:16,065 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9823 ImplicationChecksByTransitivity, 50.1s TimeCoverageRelationStatistics Valid=2556, Invalid=26856, Unknown=0, NotChecked=0, Total=29412 [2022-04-05 06:00:16,065 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 185 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 3379 mSolverCounterSat, 395 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 3774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 395 IncrementalHoareTripleChecker+Valid, 3379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-04-05 06:00:16,066 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 157 Invalid, 3774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [395 Valid, 3379 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-04-05 06:00:16,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2022-04-05 06:00:16,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 731. [2022-04-05 06:00:16,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 726 states have (on average 1.4338842975206612) internal successors, (1041), 726 states have internal predecessors, (1041), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 06:00:16,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 1045 transitions. [2022-04-05 06:00:16,193 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 1045 transitions. Word has length 41 [2022-04-05 06:00:16,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:00:16,194 INFO L478 AbstractCegarLoop]: Abstraction has 731 states and 1045 transitions. [2022-04-05 06:00:16,194 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 06:00:16,194 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 1045 transitions. [2022-04-05 06:00:16,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-05 06:00:16,195 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:00:16,195 INFO L499 BasicCegarLoop]: trace histogram [11, 9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:00:16,232 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-04-05 06:00:16,432 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:00:16,432 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:00:16,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:00:16,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1409959931, now seen corresponding path program 8 times [2022-04-05 06:00:16,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:00:16,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562761500] [2022-04-05 06:00:16,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:00:16,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:00:16,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:00:16,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:00:16,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:00:16,807 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-05 06:00:16,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:00:16,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562761500] [2022-04-05 06:00:16,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562761500] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:00:16,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23429827] [2022-04-05 06:00:16,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 06:00:16,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:00:16,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:00:16,809 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:00:16,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-04-05 06:00:16,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:00:16,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:00:16,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 42 conjunts are in the unsatisfiable core [2022-04-05 06:00:16,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:00:17,213 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 27 proven. 81 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-04-05 06:00:17,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:00:17,282 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 27 proven. 81 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-04-05 06:00:17,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23429827] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:00:17,282 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:00:17,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 12, 12] total 35 [2022-04-05 06:00:17,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438391318] [2022-04-05 06:00:17,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:00:17,283 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-05 06:00:17,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:00:17,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-05 06:00:17,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1114, Unknown=0, NotChecked=0, Total=1190 [2022-04-05 06:00:17,284 INFO L87 Difference]: Start difference. First operand 731 states and 1045 transitions. Second operand has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 34 states have internal predecessors, (61), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 06:01:29,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:01:29,083 INFO L93 Difference]: Finished difference Result 1266 states and 1852 transitions. [2022-04-05 06:01:29,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2022-04-05 06:01:29,084 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 34 states have internal predecessors, (61), 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 41 [2022-04-05 06:01:29,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:01:29,087 INFO L225 Difference]: With dead ends: 1266 [2022-04-05 06:01:29,087 INFO L226 Difference]: Without dead ends: 1065 [2022-04-05 06:01:29,089 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11630 ImplicationChecksByTransitivity, 62.3s TimeCoverageRelationStatistics Valid=2835, Invalid=31947, Unknown=0, NotChecked=0, Total=34782 [2022-04-05 06:01:29,089 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 331 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 3019 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 3567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 3019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2022-04-05 06:01:29,089 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 165 Invalid, 3567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 3019 Invalid, 0 Unknown, 0 Unchecked, 9.8s Time] [2022-04-05 06:01:29,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2022-04-05 06:01:29,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 781. [2022-04-05 06:01:29,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 776 states have (on average 1.3994845360824741) internal successors, (1086), 776 states have internal predecessors, (1086), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 06:01:29,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 1090 transitions. [2022-04-05 06:01:29,309 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 1090 transitions. Word has length 41 [2022-04-05 06:01:29,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:01:29,309 INFO L478 AbstractCegarLoop]: Abstraction has 781 states and 1090 transitions. [2022-04-05 06:01:29,309 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 34 states have internal predecessors, (61), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 06:01:29,309 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 1090 transitions. [2022-04-05 06:01:29,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-05 06:01:29,311 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:01:29,311 INFO L499 BasicCegarLoop]: trace histogram [12, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:01:29,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-04-05 06:01:29,527 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-04-05 06:01:29,527 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:01:29,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:01:29,528 INFO L85 PathProgramCache]: Analyzing trace with hash -548826641, now seen corresponding path program 10 times [2022-04-05 06:01:29,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:01:29,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877877819] [2022-04-05 06:01:29,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:01:29,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:01:29,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:01:29,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:01:29,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:01:29,963 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-05 06:01:29,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:01:29,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877877819] [2022-04-05 06:01:29,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877877819] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:01:29,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838483439] [2022-04-05 06:01:29,964 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 06:01:29,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:01:29,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:01:29,965 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:01:29,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-04-05 06:01:30,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 06:01:30,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:01:30,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 46 conjunts are in the unsatisfiable core [2022-04-05 06:01:30,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:01:30,447 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 40 proven. 74 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-04-05 06:01:30,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:01:30,528 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 40 proven. 74 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-04-05 06:01:30,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838483439] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:01:30,529 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:01:30,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 12, 12] total 36 [2022-04-05 06:01:30,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596608017] [2022-04-05 06:01:30,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:01:30,529 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-05 06:01:30,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:01:30,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-05 06:01:30,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=1182, Unknown=0, NotChecked=0, Total=1260 [2022-04-05 06:01:30,530 INFO L87 Difference]: Start difference. First operand 781 states and 1090 transitions. Second operand has 36 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 35 states have internal predecessors, (62), 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 06:02:49,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:02:49,282 INFO L93 Difference]: Finished difference Result 1302 states and 1878 transitions. [2022-04-05 06:02:49,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2022-04-05 06:02:49,283 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 35 states have internal predecessors, (62), 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 43 [2022-04-05 06:02:49,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:02:49,286 INFO L225 Difference]: With dead ends: 1302 [2022-04-05 06:02:49,286 INFO L226 Difference]: Without dead ends: 1099 [2022-04-05 06:02:49,288 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14390 ImplicationChecksByTransitivity, 66.7s TimeCoverageRelationStatistics Valid=3225, Invalid=38595, Unknown=0, NotChecked=0, Total=41820 [2022-04-05 06:02:49,300 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 367 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 4089 mSolverCounterSat, 611 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 4700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 611 IncrementalHoareTripleChecker+Valid, 4089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2022-04-05 06:02:49,300 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 198 Invalid, 4700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [611 Valid, 4089 Invalid, 0 Unknown, 0 Unchecked, 12.3s Time] [2022-04-05 06:02:49,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2022-04-05 06:02:49,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 761. [2022-04-05 06:02:49,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 756 states have (on average 1.3928571428571428) internal successors, (1053), 756 states have internal predecessors, (1053), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 06:02:49,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 1057 transitions. [2022-04-05 06:02:49,507 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 1057 transitions. Word has length 43 [2022-04-05 06:02:49,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:02:49,507 INFO L478 AbstractCegarLoop]: Abstraction has 761 states and 1057 transitions. [2022-04-05 06:02:49,507 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 35 states have internal predecessors, (62), 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 06:02:49,507 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 1057 transitions. [2022-04-05 06:02:49,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-05 06:02:49,514 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:02:49,515 INFO L499 BasicCegarLoop]: trace histogram [13, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:02:49,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-04-05 06:02:49,738 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-04-05 06:02:49,738 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:02:49,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:02:49,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1605467591, now seen corresponding path program 12 times [2022-04-05 06:02:49,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:02:49,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877978784] [2022-04-05 06:02:49,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:02:49,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:02:49,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:02:50,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:02:50,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:02:50,105 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-04-05 06:02:50,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:02:50,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877978784] [2022-04-05 06:02:50,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877978784] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:02:50,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193699308] [2022-04-05 06:02:50,105 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 06:02:50,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:02:50,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:02:50,106 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:02:50,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-04-05 06:02:50,234 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-05 06:02:50,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:02:50,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-05 06:02:50,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:02:50,551 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-04-05 06:02:50,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:02:50,754 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-04-05 06:02:50,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193699308] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:02:50,754 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:02:50,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 7, 7] total 33 [2022-04-05 06:02:50,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115107913] [2022-04-05 06:02:50,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:02:50,755 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-05 06:02:50,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:02:50,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-05 06:02:50,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2022-04-05 06:02:50,756 INFO L87 Difference]: Start difference. First operand 761 states and 1057 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 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 06:03:03,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:03:03,820 INFO L93 Difference]: Finished difference Result 1534 states and 2235 transitions. [2022-04-05 06:03:03,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 238 states. [2022-04-05 06:03:03,820 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 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 44 [2022-04-05 06:03:03,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:03:03,824 INFO L225 Difference]: With dead ends: 1534 [2022-04-05 06:03:03,824 INFO L226 Difference]: Without dead ends: 1293 [2022-04-05 06:03:03,827 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27284 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=4302, Invalid=67254, Unknown=0, NotChecked=0, Total=71556 [2022-04-05 06:03:03,827 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 314 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 4709 mSolverCounterSat, 856 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 5565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 856 IncrementalHoareTripleChecker+Valid, 4709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-04-05 06:03:03,828 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 167 Invalid, 5565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [856 Valid, 4709 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-04-05 06:03:03,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1293 states. [2022-04-05 06:03:04,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1293 to 871. [2022-04-05 06:03:04,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 866 states have (on average 1.3591224018475752) internal successors, (1177), 866 states have internal predecessors, (1177), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 06:03:04,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 1181 transitions. [2022-04-05 06:03:04,016 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 1181 transitions. Word has length 44 [2022-04-05 06:03:04,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:03:04,016 INFO L478 AbstractCegarLoop]: Abstraction has 871 states and 1181 transitions. [2022-04-05 06:03:04,016 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 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 06:03:04,016 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 1181 transitions. [2022-04-05 06:03:04,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-05 06:03:04,020 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:03:04,020 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:03:04,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-04-05 06:03:04,243 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:03:04,243 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:03:04,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:03:04,244 INFO L85 PathProgramCache]: Analyzing trace with hash 688227466, now seen corresponding path program 13 times [2022-04-05 06:03:04,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:03:04,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995524008] [2022-04-05 06:03:04,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:03:04,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:03:04,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:03:04,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:03:04,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:03:04,863 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-04-05 06:03:04,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:03:04,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995524008] [2022-04-05 06:03:04,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995524008] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:03:04,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179236883] [2022-04-05 06:03:04,864 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 06:03:04,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:03:04,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:03:04,867 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:03:04,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-04-05 06:03:04,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:03:04,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-05 06:03:04,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:03:05,018 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-04-05 06:03:05,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:03:05,121 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-04-05 06:03:05,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179236883] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:03:05,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:03:05,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2022-04-05 06:03:05,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735129049] [2022-04-05 06:03:05,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:03:05,124 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-05 06:03:05,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:03:05,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-05 06:03:05,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-04-05 06:03:05,124 INFO L87 Difference]: Start difference. First operand 871 states and 1181 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 06:03:06,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:03:06,148 INFO L93 Difference]: Finished difference Result 994 states and 1338 transitions. [2022-04-05 06:03:06,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-05 06:03:06,149 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-04-05 06:03:06,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:03:06,152 INFO L225 Difference]: With dead ends: 994 [2022-04-05 06:03:06,152 INFO L226 Difference]: Without dead ends: 957 [2022-04-05 06:03:06,152 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 95 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2022-04-05 06:03:06,153 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 49 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-05 06:03:06,153 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 63 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-05 06:03:06,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-04-05 06:03:06,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 898. [2022-04-05 06:03:06,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 893 states have (on average 1.3583426651735722) internal successors, (1213), 893 states have internal predecessors, (1213), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 06:03:06,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1217 transitions. [2022-04-05 06:03:06,344 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1217 transitions. Word has length 45 [2022-04-05 06:03:06,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:03:06,345 INFO L478 AbstractCegarLoop]: Abstraction has 898 states and 1217 transitions. [2022-04-05 06:03:06,345 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 06:03:06,345 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1217 transitions. [2022-04-05 06:03:06,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-05 06:03:06,364 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:03:06,364 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:03:06,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-04-05 06:03:06,583 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-04-05 06:03:06,583 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:03:06,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:03:06,584 INFO L85 PathProgramCache]: Analyzing trace with hash -2077073297, now seen corresponding path program 11 times [2022-04-05 06:03:06,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:03:06,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789030083] [2022-04-05 06:03:06,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:03:06,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:03:06,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:03:06,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:03:06,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:03:06,939 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-04-05 06:03:06,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:03:06,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789030083] [2022-04-05 06:03:06,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789030083] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:03:06,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275875534] [2022-04-05 06:03:06,939 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 06:03:06,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:03:06,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:03:06,941 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:03:06,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-04-05 06:03:12,163 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-04-05 06:03:12,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:03:12,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 60 conjunts are in the unsatisfiable core [2022-04-05 06:03:12,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:03:12,574 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-04-05 06:03:12,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:03:13,355 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-04-05 06:03:13,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275875534] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:03:13,356 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:03:13,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 53 [2022-04-05 06:03:13,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451048006] [2022-04-05 06:03:13,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:03:13,356 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-04-05 06:03:13,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:03:13,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-04-05 06:03:13,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=2333, Unknown=0, NotChecked=0, Total=2756 [2022-04-05 06:03:13,357 INFO L87 Difference]: Start difference. First operand 898 states and 1217 transitions. Second operand has 53 states, 53 states have (on average 1.320754716981132) internal successors, (70), 52 states have internal predecessors, (70), 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 06:03:34,288 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-04-05 06:05:06,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 06:05:06,129 INFO L93 Difference]: Finished difference Result 2248 states and 3115 transitions. [2022-04-05 06:05:06,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 446 states. [2022-04-05 06:05:06,130 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.320754716981132) internal successors, (70), 52 states have internal predecessors, (70), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-04-05 06:05:06,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 06:05:06,135 INFO L225 Difference]: With dead ends: 2248 [2022-04-05 06:05:06,135 INFO L226 Difference]: Without dead ends: 1948 [2022-04-05 06:05:06,151 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 566 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 494 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107418 ImplicationChecksByTransitivity, 96.4s TimeCoverageRelationStatistics Valid=22998, Invalid=222522, Unknown=0, NotChecked=0, Total=245520 [2022-04-05 06:05:06,153 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 889 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 4609 mSolverCounterSat, 1929 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 889 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 6538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1929 IncrementalHoareTripleChecker+Valid, 4609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.6s IncrementalHoareTripleChecker+Time [2022-04-05 06:05:06,154 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [889 Valid, 185 Invalid, 6538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1929 Valid, 4609 Invalid, 0 Unknown, 0 Unchecked, 16.6s Time] [2022-04-05 06:05:06,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1948 states. [2022-04-05 06:05:06,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1948 to 1059. [2022-04-05 06:05:06,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1059 states, 1054 states have (on average 1.3500948766603416) internal successors, (1423), 1054 states have internal predecessors, (1423), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 06:05:06,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1059 states to 1059 states and 1427 transitions. [2022-04-05 06:05:06,413 INFO L78 Accepts]: Start accepts. Automaton has 1059 states and 1427 transitions. Word has length 45 [2022-04-05 06:05:06,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 06:05:06,413 INFO L478 AbstractCegarLoop]: Abstraction has 1059 states and 1427 transitions. [2022-04-05 06:05:06,413 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.320754716981132) internal successors, (70), 52 states have internal predecessors, (70), 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 06:05:06,414 INFO L276 IsEmpty]: Start isEmpty. Operand 1059 states and 1427 transitions. [2022-04-05 06:05:06,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-05 06:05:06,415 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 06:05:06,415 INFO L499 BasicCegarLoop]: trace histogram [20, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 06:05:06,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-04-05 06:05:06,621 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-04-05 06:05:06,622 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 06:05:06,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 06:05:06,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1054766260, now seen corresponding path program 14 times [2022-04-05 06:05:06,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 06:05:06,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503399693] [2022-04-05 06:05:06,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 06:05:06,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 06:05:06,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:05:07,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 06:05:07,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 06:05:07,094 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-05 06:05:07,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 06:05:07,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503399693] [2022-04-05 06:05:07,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503399693] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 06:05:07,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769433373] [2022-04-05 06:05:07,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 06:05:07,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 06:05:07,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 06:05:07,100 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 06:05:07,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-04-05 06:05:07,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 06:05:07,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 06:05:07,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-05 06:05:07,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 06:05:07,455 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 06:05:07,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 06:05:08,449 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 06:05:08,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769433373] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 06:05:08,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 06:05:08,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 23, 23] total 48 [2022-04-05 06:05:08,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942384803] [2022-04-05 06:05:08,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 06:05:08,450 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-04-05 06:05:08,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 06:05:08,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-04-05 06:05:08,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=1724, Unknown=0, NotChecked=0, Total=2256 [2022-04-05 06:05:08,450 INFO L87 Difference]: Start difference. First operand 1059 states and 1427 transitions. Second operand has 48 states, 48 states have (on average 1.5416666666666667) internal successors, (74), 47 states have internal predecessors, (74), 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 06:05:55,503 WARN L232 SmtUtils]: Spent 25.88s on a formula simplification that was a NOOP. DAG size: 92 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-05 06:05:58,118 WARN L833 $PredicateComparison]: unable to prove that (and (< 0 (mod (+ 2 c_main_~y~0) 4294967296)) (= |c_#NULL.base| |c_old(#NULL.base)|) (< 0 (mod (+ 11 c_main_~y~0) 4294967296)) (< 0 (mod c_main_~y~0 4294967296)) (< 0 (mod (+ 4294967294 c_main_~y~0) 4294967296)) (< 0 (mod (+ 13 c_main_~y~0) 4294967296)) (< 0 (mod (+ 3 c_main_~y~0) 4294967296)) (< 0 (mod (+ c_main_~y~0 4294967293) 4294967296)) (< 0 (mod (+ c_main_~y~0 1) 4294967296)) (< 0 (mod (+ 4294967295 c_main_~y~0) 4294967296)) (< 0 (mod (+ 15 c_main_~y~0) 4294967296)) (< 0 (mod (+ 8 c_main_~y~0) 4294967296)) (< 0 (mod (+ 6 c_main_~y~0) 4294967296)) (< 0 (mod (+ 5 c_main_~y~0) 4294967296)) (< 0 (mod (+ 4 c_main_~y~0) 4294967296)) (< 0 (mod (+ 9 c_main_~y~0) 4294967296)) (< 0 (mod (+ 14 c_main_~y~0) 4294967296)) (< 0 (mod (+ 10 c_main_~y~0) 4294967296)) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (< 0 (mod (+ 7 c_main_~y~0) 4294967296)) (< 0 (mod (+ 16 c_main_~y~0) 4294967296)) (< 0 (mod (+ 12 c_main_~y~0) 4294967296))) is different from false