/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/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/array-examples/sanfoundry_27_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 07:23:39,779 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 07:23:39,780 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 07:23:39,831 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 07:23:39,837 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 07:23:39,837 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 07:23:39,838 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 07:23:39,838 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 07:23:39,839 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 07:23:39,840 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 07:23:39,841 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 07:23:39,842 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 07:23:39,845 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 07:23:39,852 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 07:23:39,854 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 07:23:39,856 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 07:23:39,862 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 07:23:39,867 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 07:23:39,867 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 07:23:39,868 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 07:23:39,873 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 07:23:39,883 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 07:23:39,883 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 07:23:39,884 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 07:23:39,885 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 07:23:39,885 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 07:23:39,885 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 07:23:39,885 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 07:23:39,885 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 07:23:39,885 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 07:23:39,885 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 07:23:39,886 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 07:23:39,886 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 07:23:39,886 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 07:23:39,886 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 07:23:39,886 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 07:23:39,886 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 07:23:39,886 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 07:23:39,886 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 07:23:39,886 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 07:23:39,886 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 07:23:39,886 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 07:23:39,887 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 07:23:39,887 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 07:23:40,076 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 07:23:40,088 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 07:23:40,090 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 07:23:40,090 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 07:23:40,091 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 07:23:40,092 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sanfoundry_27_ground.i [2022-01-31 07:23:40,135 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66fb537d8/5aa61bd5d2c84314a117ba6d678cb7f0/FLAG3f495905d [2022-01-31 07:23:40,475 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 07:23:40,476 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sanfoundry_27_ground.i [2022-01-31 07:23:40,481 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66fb537d8/5aa61bd5d2c84314a117ba6d678cb7f0/FLAG3f495905d [2022-01-31 07:23:40,489 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/66fb537d8/5aa61bd5d2c84314a117ba6d678cb7f0 [2022-01-31 07:23:40,490 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 07:23:40,491 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 07:23:40,492 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 07:23:40,492 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 07:23:40,494 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 07:23:40,495 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:23:40" (1/1) ... [2022-01-31 07:23:40,495 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32dd9ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:40, skipping insertion in model container [2022-01-31 07:23:40,496 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:23:40" (1/1) ... [2022-01-31 07:23:40,500 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 07:23:40,509 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 07:23:40,648 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sanfoundry_27_ground.i[813,826] [2022-01-31 07:23:40,660 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 07:23:40,665 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 07:23:40,672 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sanfoundry_27_ground.i[813,826] [2022-01-31 07:23:40,676 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 07:23:40,686 INFO L208 MainTranslator]: Completed translation [2022-01-31 07:23:40,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:40 WrapperNode [2022-01-31 07:23:40,686 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 07:23:40,687 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 07:23:40,687 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 07:23:40,687 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 07:23:40,694 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:40" (1/1) ... [2022-01-31 07:23:40,694 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:40" (1/1) ... [2022-01-31 07:23:40,699 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:40" (1/1) ... [2022-01-31 07:23:40,699 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:40" (1/1) ... [2022-01-31 07:23:40,703 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:40" (1/1) ... [2022-01-31 07:23:40,706 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:40" (1/1) ... [2022-01-31 07:23:40,706 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:40" (1/1) ... [2022-01-31 07:23:40,707 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 07:23:40,708 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 07:23:40,708 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 07:23:40,708 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 07:23:40,709 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:40" (1/1) ... [2022-01-31 07:23:40,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 07:23:40,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:40,730 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) [2022-01-31 07:23:40,748 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 [2022-01-31 07:23:40,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 07:23:40,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 07:23:40,758 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 07:23:40,758 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 07:23:40,758 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 07:23:40,758 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 07:23:40,758 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 07:23:40,758 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 07:23:40,759 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 07:23:40,759 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 07:23:40,759 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 07:23:40,759 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 07:23:40,759 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 07:23:40,759 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 07:23:40,759 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 07:23:40,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 07:23:40,761 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 07:23:40,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 07:23:40,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 07:23:40,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 07:23:40,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 07:23:40,822 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 07:23:40,823 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 07:23:40,954 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 07:23:40,957 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 07:23:40,957 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 07:23:40,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:23:40 BoogieIcfgContainer [2022-01-31 07:23:40,959 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 07:23:40,959 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 07:23:40,959 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 07:23:40,960 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 07:23:40,963 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:23:40" (1/1) ... [2022-01-31 07:23:40,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 07:23:40 BasicIcfg [2022-01-31 07:23:40,990 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 07:23:40,991 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 07:23:40,991 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 07:23:40,996 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 07:23:40,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 07:23:40" (1/4) ... [2022-01-31 07:23:40,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@700bd145 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:23:40, skipping insertion in model container [2022-01-31 07:23:40,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:23:40" (2/4) ... [2022-01-31 07:23:40,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@700bd145 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:23:40, skipping insertion in model container [2022-01-31 07:23:40,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:23:40" (3/4) ... [2022-01-31 07:23:40,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@700bd145 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 07:23:40, skipping insertion in model container [2022-01-31 07:23:40,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 07:23:40" (4/4) ... [2022-01-31 07:23:40,998 INFO L111 eAbstractionObserver]: Analyzing ICFG sanfoundry_27_ground.iJordan [2022-01-31 07:23:41,002 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 07:23:41,002 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 07:23:41,039 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 07:23:41,046 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 07:23:41,047 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 07:23:41,056 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 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) [2022-01-31 07:23:41,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 07:23:41,061 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:41,061 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:23:41,062 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:41,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:41,066 INFO L85 PathProgramCache]: Analyzing trace with hash -2096864927, now seen corresponding path program 1 times [2022-01-31 07:23:41,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:41,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945690722] [2022-01-31 07:23:41,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:41,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:41,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:41,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:41,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:41,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:23:41,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:41,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945690722] [2022-01-31 07:23:41,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945690722] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:23:41,219 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 07:23:41,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 07:23:41,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004996271] [2022-01-31 07:23:41,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:23:41,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 07:23:41,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:41,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 07:23:41,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 07:23:41,250 INFO L87 Difference]: Start difference. First operand has 28 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 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 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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) [2022-01-31 07:23:41,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:41,273 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2022-01-31 07:23:41,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 07:23:41,275 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 15 [2022-01-31 07:23:41,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:41,279 INFO L225 Difference]: With dead ends: 28 [2022-01-31 07:23:41,279 INFO L226 Difference]: Without dead ends: 23 [2022-01-31 07:23:41,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 07:23:41,283 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 22 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 33 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 [2022-01-31 07:23:41,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 33 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 07:23:41,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-01-31 07:23:41,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-01-31 07:23:41,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:23:41,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-01-31 07:23:41,303 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 15 [2022-01-31 07:23:41,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:41,304 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-01-31 07:23:41,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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) [2022-01-31 07:23:41,304 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-01-31 07:23:41,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 07:23:41,304 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:41,304 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:23:41,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 07:23:41,305 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:41,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:41,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1278151587, now seen corresponding path program 1 times [2022-01-31 07:23:41,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:41,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312728461] [2022-01-31 07:23:41,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:41,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:41,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:41,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:41,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:41,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:23:41,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:41,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312728461] [2022-01-31 07:23:41,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312728461] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:23:41,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 07:23:41,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 07:23:41,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236323180] [2022-01-31 07:23:41,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:23:41,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 07:23:41,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:41,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 07:23:41,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 07:23:41,350 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-01-31 07:23:41,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:41,395 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2022-01-31 07:23:41,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 07:23:41,396 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 15 [2022-01-31 07:23:41,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:41,396 INFO L225 Difference]: With dead ends: 25 [2022-01-31 07:23:41,397 INFO L226 Difference]: Without dead ends: 25 [2022-01-31 07:23:41,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 07:23:41,401 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:41,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 30 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 07:23:41,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-31 07:23:41,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-01-31 07:23:41,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:23:41,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-01-31 07:23:41,410 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 15 [2022-01-31 07:23:41,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:41,411 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-01-31 07:23:41,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-01-31 07:23:41,411 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-01-31 07:23:41,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 07:23:41,414 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:41,418 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:23:41,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 07:23:41,419 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:41,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:41,423 INFO L85 PathProgramCache]: Analyzing trace with hash 415469345, now seen corresponding path program 1 times [2022-01-31 07:23:41,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:41,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193999637] [2022-01-31 07:23:41,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:41,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:41,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:41,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:41,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:41,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 07:23:41,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:41,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193999637] [2022-01-31 07:23:41,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193999637] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:23:41,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019304495] [2022-01-31 07:23:41,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:41,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:41,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:41,510 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) [2022-01-31 07:23:41,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 07:23:41,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:41,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-31 07:23:41,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:23:41,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 07:23:41,612 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 07:23:41,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019304495] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:23:41,614 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 07:23:41,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2022-01-31 07:23:41,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727927978] [2022-01-31 07:23:41,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:23:41,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 07:23:41,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:41,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 07:23:41,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 07:23:41,618 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2022-01-31 07:23:41,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:41,635 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2022-01-31 07:23:41,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 07:23:41,636 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 17 [2022-01-31 07:23:41,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:41,636 INFO L225 Difference]: With dead ends: 28 [2022-01-31 07:23:41,637 INFO L226 Difference]: Without dead ends: 28 [2022-01-31 07:23:41,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 07:23:41,639 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 4 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:41,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 38 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 07:23:41,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-31 07:23:41,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2022-01-31 07:23:41,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:23:41,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-01-31 07:23:41,646 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2022-01-31 07:23:41,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:41,646 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-01-31 07:23:41,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2022-01-31 07:23:41,647 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-01-31 07:23:41,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 07:23:41,648 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:41,648 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:23:41,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 07:23:41,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:41,862 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:41,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:41,863 INFO L85 PathProgramCache]: Analyzing trace with hash 770349770, now seen corresponding path program 1 times [2022-01-31 07:23:41,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:41,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649726474] [2022-01-31 07:23:41,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:41,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:41,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:41,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:41,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:41,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 07:23:41,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:41,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649726474] [2022-01-31 07:23:41,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649726474] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:23:41,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051949404] [2022-01-31 07:23:41,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:41,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:41,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:41,967 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) [2022-01-31 07:23:41,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 07:23:42,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:42,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 07:23:42,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:23:42,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 07:23:42,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:23:42,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 07:23:42,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051949404] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:23:42,146 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:23:42,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 07:23:42,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417173690] [2022-01-31 07:23:42,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:23:42,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 07:23:42,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:42,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 07:23:42,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 07:23:42,153 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 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) [2022-01-31 07:23:42,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:42,278 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2022-01-31 07:23:42,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 07:23:42,279 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 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 [2022-01-31 07:23:42,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:42,281 INFO L225 Difference]: With dead ends: 37 [2022-01-31 07:23:42,281 INFO L226 Difference]: Without dead ends: 37 [2022-01-31 07:23:42,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-01-31 07:23:42,283 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 46 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:42,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 42 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:23:42,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-31 07:23:42,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-01-31 07:23:42,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 31 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 07:23:42,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2022-01-31 07:23:42,290 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 20 [2022-01-31 07:23:42,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:42,290 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2022-01-31 07:23:42,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 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) [2022-01-31 07:23:42,291 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2022-01-31 07:23:42,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 07:23:42,291 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:42,292 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:23:42,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 07:23:42,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-31 07:23:42,497 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:42,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:42,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1973245744, now seen corresponding path program 2 times [2022-01-31 07:23:42,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:42,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090569317] [2022-01-31 07:23:42,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:42,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:42,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:42,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:42,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:42,622 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 07:23:42,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:42,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090569317] [2022-01-31 07:23:42,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090569317] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:23:42,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112472921] [2022-01-31 07:23:42,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 07:23:42,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:42,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:42,624 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) [2022-01-31 07:23:42,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 07:23:42,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-31 07:23:42,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:23:42,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-31 07:23:42,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:23:42,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-31 07:23:42,890 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-31 07:23:42,891 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 07:23:42,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112472921] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:23:42,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 07:23:42,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-01-31 07:23:42,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287635000] [2022-01-31 07:23:42,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:23:42,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 07:23:42,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:42,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 07:23:42,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-01-31 07:23:42,893 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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) [2022-01-31 07:23:42,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:42,956 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2022-01-31 07:23:42,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 07:23:42,957 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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 32 [2022-01-31 07:23:42,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:42,959 INFO L225 Difference]: With dead ends: 58 [2022-01-31 07:23:42,960 INFO L226 Difference]: Without dead ends: 58 [2022-01-31 07:23:42,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-31 07:23:42,961 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 27 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:42,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 95 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 07:23:42,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-01-31 07:23:42,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2022-01-31 07:23:42,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 45 states have internal predecessors, (53), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 07:23:42,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2022-01-31 07:23:42,973 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 32 [2022-01-31 07:23:42,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:42,973 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2022-01-31 07:23:42,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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) [2022-01-31 07:23:42,973 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2022-01-31 07:23:42,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 07:23:42,975 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:42,975 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:23:42,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 07:23:43,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:43,192 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:43,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:43,193 INFO L85 PathProgramCache]: Analyzing trace with hash -514267089, now seen corresponding path program 1 times [2022-01-31 07:23:43,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:43,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029911558] [2022-01-31 07:23:43,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:43,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:43,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:43,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:43,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:43,279 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 07:23:43,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:43,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029911558] [2022-01-31 07:23:43,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029911558] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:23:43,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080245191] [2022-01-31 07:23:43,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:43,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:43,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:43,281 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) [2022-01-31 07:23:43,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 07:23:43,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:43,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 07:23:43,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:23:43,422 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 07:23:43,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:23:43,501 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 07:23:43,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080245191] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:23:43,502 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:23:43,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-01-31 07:23:43,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356122041] [2022-01-31 07:23:43,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:23:43,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 07:23:43,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:43,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 07:23:43,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 07:23:43,503 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 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) [2022-01-31 07:23:43,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:43,676 INFO L93 Difference]: Finished difference Result 100 states and 120 transitions. [2022-01-31 07:23:43,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 07:23:43,676 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 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 32 [2022-01-31 07:23:43,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:43,678 INFO L225 Difference]: With dead ends: 100 [2022-01-31 07:23:43,678 INFO L226 Difference]: Without dead ends: 100 [2022-01-31 07:23:43,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2022-01-31 07:23:43,679 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 121 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:43,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 32 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 07:23:43,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-01-31 07:23:43,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-01-31 07:23:43,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 92 states have (on average 1.2282608695652173) internal successors, (113), 93 states have internal predecessors, (113), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 07:23:43,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 120 transitions. [2022-01-31 07:23:43,684 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 120 transitions. Word has length 32 [2022-01-31 07:23:43,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:43,684 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 120 transitions. [2022-01-31 07:23:43,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 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) [2022-01-31 07:23:43,684 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 120 transitions. [2022-01-31 07:23:43,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 07:23:43,685 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:43,685 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:23:43,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 07:23:43,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:43,899 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:43,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:43,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1342346341, now seen corresponding path program 2 times [2022-01-31 07:23:43,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:43,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034826865] [2022-01-31 07:23:43,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:43,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:43,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:44,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:44,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:44,055 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-01-31 07:23:44,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:44,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034826865] [2022-01-31 07:23:44,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034826865] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:23:44,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836573675] [2022-01-31 07:23:44,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 07:23:44,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:44,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:44,059 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) [2022-01-31 07:23:44,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 07:23:44,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 07:23:44,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:23:44,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 07:23:44,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:23:44,305 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-01-31 07:23:44,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:23:44,545 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-01-31 07:23:44,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836573675] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:23:44,545 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:23:44,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-01-31 07:23:44,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842073521] [2022-01-31 07:23:44,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:23:44,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 07:23:44,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:44,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 07:23:44,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 07:23:44,547 INFO L87 Difference]: Start difference. First operand 100 states and 120 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 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) [2022-01-31 07:23:44,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:44,970 INFO L93 Difference]: Finished difference Result 196 states and 240 transitions. [2022-01-31 07:23:44,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 07:23:44,970 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 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 62 [2022-01-31 07:23:44,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:44,971 INFO L225 Difference]: With dead ends: 196 [2022-01-31 07:23:44,971 INFO L226 Difference]: Without dead ends: 196 [2022-01-31 07:23:44,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 07:23:44,973 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 317 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:44,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 42 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 07:23:44,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-01-31 07:23:44,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2022-01-31 07:23:44,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 188 states have (on average 1.2393617021276595) internal successors, (233), 189 states have internal predecessors, (233), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 07:23:44,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 240 transitions. [2022-01-31 07:23:44,980 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 240 transitions. Word has length 62 [2022-01-31 07:23:44,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:44,980 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 240 transitions. [2022-01-31 07:23:44,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 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) [2022-01-31 07:23:44,980 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 240 transitions. [2022-01-31 07:23:44,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-01-31 07:23:44,982 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:44,982 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:23:45,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 07:23:45,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:45,199 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:45,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:45,199 INFO L85 PathProgramCache]: Analyzing trace with hash 161223283, now seen corresponding path program 3 times [2022-01-31 07:23:45,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:45,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959495758] [2022-01-31 07:23:45,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:45,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:45,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:45,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:45,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:45,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1135 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2022-01-31 07:23:45,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:45,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959495758] [2022-01-31 07:23:45,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959495758] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:23:45,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756261741] [2022-01-31 07:23:45,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 07:23:45,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:45,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:45,547 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) [2022-01-31 07:23:45,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 07:23:45,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 07:23:45,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:23:45,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 07:23:45,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:23:46,141 INFO L353 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2022-01-31 07:23:46,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2022-01-31 07:23:46,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1135 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 1074 trivial. 0 not checked. [2022-01-31 07:23:46,195 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 07:23:46,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756261741] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 07:23:46,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 07:23:46,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [26] total 34 [2022-01-31 07:23:46,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897603610] [2022-01-31 07:23:46,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 07:23:46,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 07:23:46,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:46,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 07:23:46,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=796, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 07:23:46,197 INFO L87 Difference]: Start difference. First operand 196 states and 240 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 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) [2022-01-31 07:23:46,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:46,268 INFO L93 Difference]: Finished difference Result 244 states and 289 transitions. [2022-01-31 07:23:46,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 07:23:46,268 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 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 122 [2022-01-31 07:23:46,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:46,270 INFO L225 Difference]: With dead ends: 244 [2022-01-31 07:23:46,270 INFO L226 Difference]: Without dead ends: 244 [2022-01-31 07:23:46,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=335, Invalid=925, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 07:23:46,271 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 18 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:46,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 143 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 60 Invalid, 0 Unknown, 26 Unchecked, 0.0s Time] [2022-01-31 07:23:46,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-01-31 07:23:46,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 198. [2022-01-31 07:23:46,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 190 states have (on average 1.2421052631578948) internal successors, (236), 191 states have internal predecessors, (236), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 07:23:46,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 243 transitions. [2022-01-31 07:23:46,279 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 243 transitions. Word has length 122 [2022-01-31 07:23:46,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:46,279 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 243 transitions. [2022-01-31 07:23:46,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 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) [2022-01-31 07:23:46,280 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 243 transitions. [2022-01-31 07:23:46,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-01-31 07:23:46,281 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:46,281 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:23:46,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-31 07:23:46,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:46,496 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:46,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:46,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1775313899, now seen corresponding path program 4 times [2022-01-31 07:23:46,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:46,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515519770] [2022-01-31 07:23:46,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:46,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:46,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:46,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:46,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:46,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1135 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2022-01-31 07:23:46,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:46,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515519770] [2022-01-31 07:23:46,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515519770] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:23:46,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716602380] [2022-01-31 07:23:46,877 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 07:23:46,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:46,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:46,892 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) [2022-01-31 07:23:46,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 07:23:46,981 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 07:23:46,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:23:46,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-31 07:23:46,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:23:47,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1135 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2022-01-31 07:23:47,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:23:48,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1135 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2022-01-31 07:23:48,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716602380] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:23:48,141 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:23:48,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-01-31 07:23:48,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058805009] [2022-01-31 07:23:48,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:23:48,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 07:23:48,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:23:48,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 07:23:48,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 07:23:48,144 INFO L87 Difference]: Start difference. First operand 198 states and 243 transitions. Second operand has 50 states, 50 states have (on average 2.18) internal successors, (109), 49 states have internal predecessors, (109), 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) [2022-01-31 07:23:49,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:23:49,371 INFO L93 Difference]: Finished difference Result 438 states and 531 transitions. [2022-01-31 07:23:49,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 07:23:49,371 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.18) internal successors, (109), 49 states have internal predecessors, (109), 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 122 [2022-01-31 07:23:49,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:23:49,372 INFO L225 Difference]: With dead ends: 438 [2022-01-31 07:23:49,372 INFO L226 Difference]: Without dead ends: 438 [2022-01-31 07:23:49,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3433, Invalid=5687, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 07:23:49,375 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 823 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 824 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 07:23:49,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [824 Valid, 37 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 07:23:49,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-01-31 07:23:49,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 390. [2022-01-31 07:23:49,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 382 states have (on average 1.2460732984293195) internal successors, (476), 383 states have internal predecessors, (476), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 07:23:49,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 483 transitions. [2022-01-31 07:23:49,393 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 483 transitions. Word has length 122 [2022-01-31 07:23:49,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:23:49,393 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 483 transitions. [2022-01-31 07:23:49,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.18) internal successors, (109), 49 states have internal predecessors, (109), 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) [2022-01-31 07:23:49,393 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 483 transitions. [2022-01-31 07:23:49,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-01-31 07:23:49,395 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:23:49,395 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 45, 45, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:23:49,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-31 07:23:49,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:49,596 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:23:49,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:23:49,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1853336005, now seen corresponding path program 5 times [2022-01-31 07:23:49,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:23:49,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573539540] [2022-01-31 07:23:49,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:23:49,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:23:49,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:50,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:23:50,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:23:50,577 INFO L134 CoverageAnalysis]: Checked inductivity of 5131 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 3015 trivial. 0 not checked. [2022-01-31 07:23:50,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:23:50,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573539540] [2022-01-31 07:23:50,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573539540] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:23:50,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325217047] [2022-01-31 07:23:50,577 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 07:23:50,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:23:50,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:23:50,578 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) [2022-01-31 07:23:50,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-31 07:24:28,157 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2022-01-31 07:24:28,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:24:28,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 759 conjuncts, 48 conjunts are in the unsatisfiable core [2022-01-31 07:24:28,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:24:28,587 INFO L134 CoverageAnalysis]: Checked inductivity of 5131 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 3015 trivial. 0 not checked. [2022-01-31 07:24:28,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:24:30,458 INFO L134 CoverageAnalysis]: Checked inductivity of 5131 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 3015 trivial. 0 not checked. [2022-01-31 07:24:30,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325217047] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:24:30,459 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:24:30,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 98 [2022-01-31 07:24:30,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332432680] [2022-01-31 07:24:30,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:24:30,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 07:24:30,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:24:30,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 07:24:30,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 07:24:30,464 INFO L87 Difference]: Start difference. First operand 390 states and 483 transitions. Second operand has 98 states, 98 states have (on average 2.0918367346938775) internal successors, (205), 97 states have internal predecessors, (205), 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) [2022-01-31 07:24:34,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:24:34,465 INFO L93 Difference]: Finished difference Result 870 states and 1059 transitions. [2022-01-31 07:24:34,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 07:24:34,465 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.0918367346938775) internal successors, (205), 97 states have internal predecessors, (205), 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 242 [2022-01-31 07:24:34,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:24:34,469 INFO L225 Difference]: With dead ends: 870 [2022-01-31 07:24:34,469 INFO L226 Difference]: Without dead ends: 870 [2022-01-31 07:24:34,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 628 GetRequests, 438 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5728 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=13777, Invalid=22895, Unknown=0, NotChecked=0, Total=36672 [2022-01-31 07:24:34,475 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 1709 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 702 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1710 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 702 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 07:24:34,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1710 Valid, 42 Invalid, 1322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [702 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 07:24:34,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2022-01-31 07:24:34,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 774. [2022-01-31 07:24:34,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 766 states have (on average 1.248041775456919) internal successors, (956), 767 states have internal predecessors, (956), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 07:24:34,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 963 transitions. [2022-01-31 07:24:34,487 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 963 transitions. Word has length 242 [2022-01-31 07:24:34,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:24:34,487 INFO L470 AbstractCegarLoop]: Abstraction has 774 states and 963 transitions. [2022-01-31 07:24:34,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.0918367346938775) internal successors, (205), 97 states have internal predecessors, (205), 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) [2022-01-31 07:24:34,488 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 963 transitions. [2022-01-31 07:24:34,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2022-01-31 07:24:34,492 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:24:34,493 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 93, 93, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:24:34,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-31 07:24:34,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-31 07:24:34,721 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:24:34,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:24:34,721 INFO L85 PathProgramCache]: Analyzing trace with hash -52476635, now seen corresponding path program 6 times [2022-01-31 07:24:34,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:24:34,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602304651] [2022-01-31 07:24:34,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:24:34,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:24:34,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:37,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:24:37,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:24:37,616 INFO L134 CoverageAnalysis]: Checked inductivity of 21763 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 12927 trivial. 0 not checked. [2022-01-31 07:24:37,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:24:37,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602304651] [2022-01-31 07:24:37,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602304651] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:24:37,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324892517] [2022-01-31 07:24:37,616 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 07:24:37,617 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:24:37,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:24:37,618 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) [2022-01-31 07:24:37,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-31 07:24:37,750 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-01-31 07:24:37,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:24:37,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 07:24:37,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:24:39,345 INFO L353 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2022-01-31 07:24:39,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2022-01-31 07:24:39,460 INFO L134 CoverageAnalysis]: Checked inductivity of 21763 backedges. 548 proven. 1 refuted. 0 times theorem prover too weak. 21214 trivial. 0 not checked. [2022-01-31 07:24:39,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:24:41,162 INFO L134 CoverageAnalysis]: Checked inductivity of 21763 backedges. 457 proven. 92 refuted. 0 times theorem prover too weak. 21214 trivial. 0 not checked. [2022-01-31 07:24:41,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324892517] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:24:41,163 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:24:41,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 10, 9] total 111 [2022-01-31 07:24:41,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406948451] [2022-01-31 07:24:41,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:24:41,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-01-31 07:24:41,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:24:41,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-01-31 07:24:41,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4705, Invalid=7505, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 07:24:41,167 INFO L87 Difference]: Start difference. First operand 774 states and 963 transitions. Second operand has 111 states, 109 states have (on average 2.18348623853211) internal successors, (238), 109 states have internal predecessors, (238), 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) [2022-01-31 07:25:23,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:25:23,728 INFO L93 Difference]: Finished difference Result 892 states and 1086 transitions. [2022-01-31 07:25:23,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 579 states. [2022-01-31 07:25:23,729 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 109 states have (on average 2.18348623853211) internal successors, (238), 109 states have internal predecessors, (238), 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 482 [2022-01-31 07:25:23,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:25:23,748 INFO L225 Difference]: With dead ends: 892 [2022-01-31 07:25:23,748 INFO L226 Difference]: Without dead ends: 892 [2022-01-31 07:25:23,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1639 GetRequests, 953 SyntacticMatches, 1 SemanticMatches, 685 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197581 ImplicationChecksByTransitivity, 36.9s TimeCoverageRelationStatistics Valid=121682, Invalid=349600, Unknown=0, NotChecked=0, Total=471282 [2022-01-31 07:25:23,772 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 656 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 1516 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 657 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 10240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1516 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7971 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 07:25:23,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [657 Valid, 81 Invalid, 10240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1516 Valid, 753 Invalid, 0 Unknown, 7971 Unchecked, 1.0s Time] [2022-01-31 07:25:23,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 892 states. [2022-01-31 07:25:23,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 892 to 498. [2022-01-31 07:25:23,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 490 states have (on average 1.1979591836734693) internal successors, (587), 491 states have internal predecessors, (587), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 07:25:23,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 594 transitions. [2022-01-31 07:25:23,785 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 594 transitions. Word has length 482 [2022-01-31 07:25:23,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:25:23,785 INFO L470 AbstractCegarLoop]: Abstraction has 498 states and 594 transitions. [2022-01-31 07:25:23,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 109 states have (on average 2.18348623853211) internal successors, (238), 109 states have internal predecessors, (238), 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) [2022-01-31 07:25:23,786 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 594 transitions. [2022-01-31 07:25:23,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2022-01-31 07:25:23,791 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:25:23,791 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 94, 94, 94, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:25:23,811 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-01-31 07:25:24,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:25:24,008 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:25:24,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:25:24,008 INFO L85 PathProgramCache]: Analyzing trace with hash 744703866, now seen corresponding path program 1 times [2022-01-31 07:25:24,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:25:24,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079768344] [2022-01-31 07:25:24,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:25:24,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:25:24,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:25:27,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:25:27,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:25:27,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 483 [2022-01-31 07:25:27,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:25:27,100 INFO L134 CoverageAnalysis]: Checked inductivity of 22236 backedges. 2 proven. 9025 refuted. 0 times theorem prover too weak. 13209 trivial. 0 not checked. [2022-01-31 07:25:27,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:25:27,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079768344] [2022-01-31 07:25:27,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079768344] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:25:27,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001198217] [2022-01-31 07:25:27,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:25:27,101 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:25:27,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:25:27,112 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) [2022-01-31 07:25:27,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-31 07:25:27,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:25:27,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 1507 conjuncts, 97 conjunts are in the unsatisfiable core [2022-01-31 07:25:27,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:25:28,053 INFO L134 CoverageAnalysis]: Checked inductivity of 22236 backedges. 0 proven. 9025 refuted. 0 times theorem prover too weak. 13211 trivial. 0 not checked. [2022-01-31 07:25:28,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:25:35,106 INFO L134 CoverageAnalysis]: Checked inductivity of 22236 backedges. 2 proven. 9025 refuted. 0 times theorem prover too weak. 13209 trivial. 0 not checked. [2022-01-31 07:25:35,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001198217] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:25:35,107 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:25:35,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 98, 98] total 196 [2022-01-31 07:25:35,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483177399] [2022-01-31 07:25:35,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:25:35,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 196 states [2022-01-31 07:25:35,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:25:35,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 196 interpolants. [2022-01-31 07:25:35,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18917, Invalid=19303, Unknown=0, NotChecked=0, Total=38220 [2022-01-31 07:25:35,115 INFO L87 Difference]: Start difference. First operand 498 states and 594 transitions. Second operand has 196 states, 196 states have (on average 2.076530612244898) internal successors, (407), 195 states have internal predecessors, (407), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 07:25:56,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:25:56,523 INFO L93 Difference]: Finished difference Result 983 states and 1176 transitions. [2022-01-31 07:25:56,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2022-01-31 07:25:56,524 INFO L78 Accepts]: Start accepts. Automaton has has 196 states, 196 states have (on average 2.076530612244898) internal successors, (407), 195 states have internal predecessors, (407), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 495 [2022-01-31 07:25:56,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:25:56,541 INFO L225 Difference]: With dead ends: 983 [2022-01-31 07:25:56,541 INFO L226 Difference]: Without dead ends: 983 [2022-01-31 07:25:56,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1283 GetRequests, 897 SyntacticMatches, 0 SemanticMatches, 386 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23466 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=56358, Invalid=93798, Unknown=0, NotChecked=0, Total=150156 [2022-01-31 07:25:56,547 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 3855 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 1545 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3856 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 2758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1545 IncrementalHoareTripleChecker+Valid, 1213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 07:25:56,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3856 Valid, 42 Invalid, 2758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1545 Valid, 1213 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 07:25:56,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2022-01-31 07:25:56,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 983. [2022-01-31 07:25:56,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 983 states, 975 states have (on average 1.198974358974359) internal successors, (1169), 976 states have internal predecessors, (1169), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 07:25:56,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 983 states to 983 states and 1176 transitions. [2022-01-31 07:25:56,566 INFO L78 Accepts]: Start accepts. Automaton has 983 states and 1176 transitions. Word has length 495 [2022-01-31 07:25:56,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:25:56,566 INFO L470 AbstractCegarLoop]: Abstraction has 983 states and 1176 transitions. [2022-01-31 07:25:56,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 196 states, 196 states have (on average 2.076530612244898) internal successors, (407), 195 states have internal predecessors, (407), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 07:25:56,566 INFO L276 IsEmpty]: Start isEmpty. Operand 983 states and 1176 transitions. [2022-01-31 07:25:56,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 981 [2022-01-31 07:25:56,573 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:25:56,573 INFO L514 BasicCegarLoop]: trace histogram [192, 192, 191, 191, 191, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:25:56,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-31 07:25:56,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-31 07:25:56,792 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:25:56,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:25:56,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1853221539, now seen corresponding path program 2 times [2022-01-31 07:25:56,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:25:56,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919258338] [2022-01-31 07:25:56,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:25:56,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:25:57,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:26:06,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:26:06,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:26:06,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 968 [2022-01-31 07:26:06,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:26:06,426 INFO L134 CoverageAnalysis]: Checked inductivity of 91494 backedges. 2 proven. 36864 refuted. 0 times theorem prover too weak. 54628 trivial. 0 not checked. [2022-01-31 07:26:06,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:26:06,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919258338] [2022-01-31 07:26:06,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919258338] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:26:06,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130235041] [2022-01-31 07:26:06,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 07:26:06,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:26:06,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:26:06,428 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) [2022-01-31 07:26:06,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-31 07:26:06,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 07:26:06,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:26:06,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 2962 conjuncts, 194 conjunts are in the unsatisfiable core [2022-01-31 07:26:06,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:26:08,218 INFO L134 CoverageAnalysis]: Checked inductivity of 91494 backedges. 0 proven. 36864 refuted. 0 times theorem prover too weak. 54630 trivial. 0 not checked. [2022-01-31 07:26:08,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:26:32,380 INFO L134 CoverageAnalysis]: Checked inductivity of 91494 backedges. 2 proven. 36864 refuted. 0 times theorem prover too weak. 54628 trivial. 0 not checked. [2022-01-31 07:26:32,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130235041] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:26:32,381 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:26:32,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [196, 195, 195] total 390 [2022-01-31 07:26:32,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846653030] [2022-01-31 07:26:32,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:26:32,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 390 states [2022-01-31 07:26:32,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:26:32,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 390 interpolants. [2022-01-31 07:26:32,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75468, Invalid=76242, Unknown=0, NotChecked=0, Total=151710 [2022-01-31 07:26:32,398 INFO L87 Difference]: Start difference. First operand 983 states and 1176 transitions. Second operand has 390 states, 390 states have (on average 2.0384615384615383) internal successors, (795), 389 states have internal predecessors, (795), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 07:29:51,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 07:29:51,012 INFO L93 Difference]: Finished difference Result 1953 states and 2340 transitions. [2022-01-31 07:29:51,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 389 states. [2022-01-31 07:29:51,022 INFO L78 Accepts]: Start accepts. Automaton has has 390 states, 390 states have (on average 2.0384615384615383) internal successors, (795), 389 states have internal predecessors, (795), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 980 [2022-01-31 07:29:51,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 07:29:51,026 INFO L225 Difference]: With dead ends: 1953 [2022-01-31 07:29:51,026 INFO L226 Difference]: Without dead ends: 1953 [2022-01-31 07:29:51,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2544 GetRequests, 1770 SyntacticMatches, 0 SemanticMatches, 774 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93985 ImplicationChecksByTransitivity, 64.8s TimeCoverageRelationStatistics Valid=225623, Invalid=375777, Unknown=0, NotChecked=0, Total=601400 [2022-01-31 07:29:51,052 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 9932 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 2384 mSolverCounterSat, 3767 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9933 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 6151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3767 IncrementalHoareTripleChecker+Valid, 2384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-01-31 07:29:51,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9933 Valid, 47 Invalid, 6151 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3767 Valid, 2384 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-01-31 07:29:51,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1953 states. [2022-01-31 07:29:51,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1953 to 1953. [2022-01-31 07:29:51,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1953 states, 1945 states have (on average 1.1994858611825192) internal successors, (2333), 1946 states have internal predecessors, (2333), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 07:29:51,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 2340 transitions. [2022-01-31 07:29:51,073 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 2340 transitions. Word has length 980 [2022-01-31 07:29:51,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 07:29:51,073 INFO L470 AbstractCegarLoop]: Abstraction has 1953 states and 2340 transitions. [2022-01-31 07:29:51,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 390 states, 390 states have (on average 2.0384615384615383) internal successors, (795), 389 states have internal predecessors, (795), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 07:29:51,074 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 2340 transitions. [2022-01-31 07:29:51,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1951 [2022-01-31 07:29:51,093 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 07:29:51,093 INFO L514 BasicCegarLoop]: trace histogram [386, 386, 385, 385, 385, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 07:29:51,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-31 07:29:51,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-31 07:29:51,315 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 07:29:51,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 07:29:51,315 INFO L85 PathProgramCache]: Analyzing trace with hash -503791615, now seen corresponding path program 3 times [2022-01-31 07:29:51,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 07:29:51,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600204432] [2022-01-31 07:29:51,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 07:29:51,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 07:29:52,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:30:25,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 07:30:25,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:30:25,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1938 [2022-01-31 07:30:25,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 07:30:25,635 INFO L134 CoverageAnalysis]: Checked inductivity of 371145 backedges. 2 proven. 148996 refuted. 0 times theorem prover too weak. 222147 trivial. 0 not checked. [2022-01-31 07:30:25,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 07:30:25,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600204432] [2022-01-31 07:30:25,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600204432] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 07:30:25,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366445837] [2022-01-31 07:30:25,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 07:30:25,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 07:30:25,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 07:30:25,639 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) [2022-01-31 07:30:25,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-31 07:30:26,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 07:30:26,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 07:30:26,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 07:30:26,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 07:30:28,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-31 07:30:29,119 INFO L134 CoverageAnalysis]: Checked inductivity of 371145 backedges. 2 proven. 771 refuted. 0 times theorem prover too weak. 370372 trivial. 0 not checked. [2022-01-31 07:30:29,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 07:30:30,747 INFO L353 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-01-31 07:30:30,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 9 [2022-01-31 07:30:31,066 INFO L134 CoverageAnalysis]: Checked inductivity of 371145 backedges. 2 proven. 771 refuted. 0 times theorem prover too weak. 370372 trivial. 0 not checked. [2022-01-31 07:30:31,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366445837] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 07:30:31,067 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 07:30:31,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [390, 10, 10] total 400 [2022-01-31 07:30:31,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852308988] [2022-01-31 07:30:31,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 07:30:31,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 400 states [2022-01-31 07:30:31,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 07:30:31,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 400 interpolants. [2022-01-31 07:30:31,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75878, Invalid=83722, Unknown=0, NotChecked=0, Total=159600 [2022-01-31 07:30:31,084 INFO L87 Difference]: Start difference. First operand 1953 states and 2340 transitions. Second operand has 400 states, 399 states have (on average 2.0426065162907268) internal successors, (815), 398 states have internal predecessors, (815), 5 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4)