/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/loop-acceleration/array_4.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 12:18:18,063 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 12:18:18,065 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 12:18:18,102 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 12:18:18,103 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 12:18:18,105 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 12:18:18,106 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 12:18:18,108 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 12:18:18,109 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 12:18:18,113 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 12:18:18,113 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 12:18:18,114 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 12:18:18,115 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 12:18:18,116 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 12:18:18,117 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 12:18:18,119 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 12:18:18,120 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 12:18:18,120 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 12:18:18,122 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 12:18:18,125 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 12:18:18,126 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 12:18:18,127 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 12:18:18,128 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 12:18:18,129 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 12:18:18,134 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 12:18:18,141 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 12:18:18,141 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 12:18:18,141 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 12:18:18,142 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 12:18:18,152 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 12:18:18,153 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 12:18:18,154 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 12:18:18,154 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 12:18:18,154 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 12:18:18,154 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 12:18:18,154 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 12:18:18,154 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 12:18:18,154 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 12:18:18,155 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 12:18:18,155 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 12:18:18,155 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 12:18:18,155 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 12:18:18,156 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 12:18:18,156 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 12:18:18,156 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 12:18:18,156 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 12:18:18,156 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 12:18:18,156 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 12:18:18,156 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 12:18:18,156 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 12:18:18,157 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 12:18:18,157 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 12:18:18,330 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 12:18:18,352 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 12:18:18,355 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 12:18:18,356 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 12:18:18,357 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 12:18:18,358 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_4.i [2022-01-31 12:18:18,415 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55e586b5e/6422a417c6384063b3fa301fab050b85/FLAG079613341 [2022-01-31 12:18:18,751 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 12:18:18,751 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_4.i [2022-01-31 12:18:18,765 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55e586b5e/6422a417c6384063b3fa301fab050b85/FLAG079613341 [2022-01-31 12:18:18,778 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55e586b5e/6422a417c6384063b3fa301fab050b85 [2022-01-31 12:18:18,781 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 12:18:18,782 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 12:18:18,786 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 12:18:18,786 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 12:18:18,788 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 12:18:18,789 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 12:18:18" (1/1) ... [2022-01-31 12:18:18,789 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@540f2b67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:18:18, skipping insertion in model container [2022-01-31 12:18:18,790 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 12:18:18" (1/1) ... [2022-01-31 12:18:18,794 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 12:18:18,806 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 12:18:18,949 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_4.i[848,861] [2022-01-31 12:18:18,961 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 12:18:18,967 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 12:18:18,976 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_4.i[848,861] [2022-01-31 12:18:18,981 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 12:18:18,992 INFO L208 MainTranslator]: Completed translation [2022-01-31 12:18:18,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:18:18 WrapperNode [2022-01-31 12:18:18,993 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 12:18:18,994 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 12:18:18,994 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 12:18:18,994 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 12:18:19,002 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:18:18" (1/1) ... [2022-01-31 12:18:19,003 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:18:18" (1/1) ... [2022-01-31 12:18:19,008 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:18:18" (1/1) ... [2022-01-31 12:18:19,008 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:18:18" (1/1) ... [2022-01-31 12:18:19,020 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:18:18" (1/1) ... [2022-01-31 12:18:19,023 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:18:18" (1/1) ... [2022-01-31 12:18:19,024 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:18:18" (1/1) ... [2022-01-31 12:18:19,030 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 12:18:19,031 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 12:18:19,032 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 12:18:19,032 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 12:18:19,033 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:18:18" (1/1) ... [2022-01-31 12:18:19,038 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 12:18:19,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:18:19,057 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 12:18:19,088 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 12:18:19,098 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 12:18:19,098 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 12:18:19,098 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 12:18:19,098 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 12:18:19,098 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 12:18:19,098 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 12:18:19,098 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 12:18:19,099 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 12:18:19,099 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 12:18:19,099 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 12:18:19,099 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 12:18:19,099 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 12:18:19,099 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 12:18:19,099 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 12:18:19,099 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 12:18:19,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 12:18:19,099 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 12:18:19,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 12:18:19,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 12:18:19,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 12:18:19,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 12:18:19,151 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 12:18:19,152 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 12:18:19,246 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 12:18:19,250 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 12:18:19,250 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 12:18:19,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 12:18:19 BoogieIcfgContainer [2022-01-31 12:18:19,252 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 12:18:19,252 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 12:18:19,252 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 12:18:19,262 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 12:18:19,265 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 12:18:19" (1/1) ... [2022-01-31 12:18:19,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 12:18:19 BasicIcfg [2022-01-31 12:18:19,292 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 12:18:19,294 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 12:18:19,294 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 12:18:19,296 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 12:18:19,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 12:18:18" (1/4) ... [2022-01-31 12:18:19,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21795052 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 12:18:19, skipping insertion in model container [2022-01-31 12:18:19,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:18:18" (2/4) ... [2022-01-31 12:18:19,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21795052 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 12:18:19, skipping insertion in model container [2022-01-31 12:18:19,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 12:18:19" (3/4) ... [2022-01-31 12:18:19,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21795052 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 12:18:19, skipping insertion in model container [2022-01-31 12:18:19,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 12:18:19" (4/4) ... [2022-01-31 12:18:19,298 INFO L111 eAbstractionObserver]: Analyzing ICFG array_4.iJordan [2022-01-31 12:18:19,314 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 12:18:19,315 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 12:18:19,366 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 12:18:19,385 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 12:18:19,385 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 12:18:19,395 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 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 12:18:19,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-31 12:18:19,402 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:18:19,403 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:18:19,403 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:18:19,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:18:19,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1408461327, now seen corresponding path program 1 times [2022-01-31 12:18:19,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:18:19,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246458953] [2022-01-31 12:18:19,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:18:19,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:18:19,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:18:19,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:18:19,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:18:19,582 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 12:18:19,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:18:19,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246458953] [2022-01-31 12:18:19,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246458953] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 12:18:19,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 12:18:19,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 12:18:19,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076718249] [2022-01-31 12:18:19,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 12:18:19,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 12:18:19,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:18:19,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 12:18:19,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 12:18:19,615 INFO L87 Difference]: Start difference. First operand has 24 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 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 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:18:19,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:18:19,648 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2022-01-31 12:18:19,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 12:18:19,651 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-01-31 12:18:19,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:18:19,655 INFO L225 Difference]: With dead ends: 24 [2022-01-31 12:18:19,655 INFO L226 Difference]: Without dead ends: 17 [2022-01-31 12:18:19,656 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 12:18:19,658 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 16 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 27 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 12:18:19,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 27 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 12:18:19,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-01-31 12:18:19,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-01-31 12:18:19,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:18:19,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-01-31 12:18:19,682 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2022-01-31 12:18:19,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:18:19,683 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-01-31 12:18:19,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:18:19,683 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-01-31 12:18:19,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 12:18:19,684 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:18:19,684 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:18:19,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 12:18:19,685 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:18:19,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:18:19,688 INFO L85 PathProgramCache]: Analyzing trace with hash 999614691, now seen corresponding path program 1 times [2022-01-31 12:18:19,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:18:19,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949838931] [2022-01-31 12:18:19,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:18:19,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:18:19,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:18:19,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:18:19,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:18:19,749 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 12:18:19,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:18:19,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949838931] [2022-01-31 12:18:19,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949838931] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 12:18:19,750 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 12:18:19,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 12:18:19,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380384510] [2022-01-31 12:18:19,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 12:18:19,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 12:18:19,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:18:19,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 12:18:19,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 12:18:19,758 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:18:19,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:18:19,796 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2022-01-31 12:18:19,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 12:18:19,796 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-01-31 12:18:19,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:18:19,798 INFO L225 Difference]: With dead ends: 23 [2022-01-31 12:18:19,798 INFO L226 Difference]: Without dead ends: 23 [2022-01-31 12:18:19,798 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 12:18:19,799 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 20 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 12:18:19,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 21 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 12:18:19,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-01-31 12:18:19,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2022-01-31 12:18:19,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:18:19,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-01-31 12:18:19,803 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2022-01-31 12:18:19,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:18:19,803 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-01-31 12:18:19,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:18:19,803 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-01-31 12:18:19,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-31 12:18:19,803 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:18:19,804 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:18:19,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 12:18:19,804 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:18:19,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:18:19,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1202562811, now seen corresponding path program 1 times [2022-01-31 12:18:19,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:18:19,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373624432] [2022-01-31 12:18:19,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:18:19,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:18:19,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:18:19,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:18:19,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:18:19,862 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 12:18:19,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:18:19,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373624432] [2022-01-31 12:18:19,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373624432] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:18:19,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140168219] [2022-01-31 12:18:19,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:18:19,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:18:19,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:18:19,870 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 12:18:19,872 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 12:18:19,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:18:19,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 12:18:19,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:18:19,993 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 12:18:19,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 12:18:20,067 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 12:18:20,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140168219] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 12:18:20,067 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 12:18:20,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 12:18:20,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693832958] [2022-01-31 12:18:20,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 12:18:20,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 12:18:20,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:18:20,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 12:18:20,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 12:18:20,069 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:18:20,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:18:20,187 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2022-01-31 12:18:20,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 12:18:20,187 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-01-31 12:18:20,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:18:20,188 INFO L225 Difference]: With dead ends: 40 [2022-01-31 12:18:20,188 INFO L226 Difference]: Without dead ends: 40 [2022-01-31 12:18:20,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-01-31 12:18:20,189 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 46 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 12:18:20,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 31 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 12:18:20,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-31 12:18:20,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 24. [2022-01-31 12:18:20,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:18:20,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2022-01-31 12:18:20,194 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 16 [2022-01-31 12:18:20,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:18:20,195 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2022-01-31 12:18:20,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:18:20,196 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2022-01-31 12:18:20,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 12:18:20,197 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:18:20,198 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:18:20,216 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-31 12:18:20,400 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 12:18:20,400 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:18:20,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:18:20,401 INFO L85 PathProgramCache]: Analyzing trace with hash -111794581, now seen corresponding path program 2 times [2022-01-31 12:18:20,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:18:20,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376957262] [2022-01-31 12:18:20,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:18:20,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:18:20,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:18:20,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:18:20,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:18:20,496 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 12:18:20,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:18:20,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376957262] [2022-01-31 12:18:20,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376957262] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 12:18:20,497 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 12:18:20,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 12:18:20,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099607661] [2022-01-31 12:18:20,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 12:18:20,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 12:18:20,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:18:20,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 12:18:20,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 12:18:20,504 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:18:20,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:18:20,579 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2022-01-31 12:18:20,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 12:18:20,579 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-01-31 12:18:20,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:18:20,580 INFO L225 Difference]: With dead ends: 30 [2022-01-31 12:18:20,580 INFO L226 Difference]: Without dead ends: 27 [2022-01-31 12:18:20,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-31 12:18:20,582 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 19 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 12:18:20,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 30 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 12:18:20,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-31 12:18:20,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-01-31 12:18:20,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:18:20,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2022-01-31 12:18:20,586 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 22 [2022-01-31 12:18:20,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:18:20,587 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2022-01-31 12:18:20,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:18:20,587 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2022-01-31 12:18:20,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 12:18:20,587 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:18:20,587 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:18:20,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 12:18:20,588 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:18:20,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:18:20,588 INFO L85 PathProgramCache]: Analyzing trace with hash 550607117, now seen corresponding path program 1 times [2022-01-31 12:18:20,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:18:20,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360912227] [2022-01-31 12:18:20,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:18:20,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:18:20,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:18:20,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:18:20,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:18:20,647 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 12:18:20,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:18:20,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360912227] [2022-01-31 12:18:20,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360912227] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:18:20,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848709784] [2022-01-31 12:18:20,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:18:20,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:18:20,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:18:20,649 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 12:18:20,650 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 12:18:20,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:18:20,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 12:18:20,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:18:20,765 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 12:18:20,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 12:18:20,847 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 12:18:20,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848709784] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 12:18:20,847 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 12:18:20,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-01-31 12:18:20,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038638907] [2022-01-31 12:18:20,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 12:18:20,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 12:18:20,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:18:20,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 12:18:20,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2022-01-31 12:18:20,849 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 14 states have internal predecessors, (43), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:18:21,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:18:21,060 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2022-01-31 12:18:21,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 12:18:21,061 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 14 states have internal predecessors, (43), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-01-31 12:18:21,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:18:21,063 INFO L225 Difference]: With dead ends: 77 [2022-01-31 12:18:21,063 INFO L226 Difference]: Without dead ends: 66 [2022-01-31 12:18:21,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2022-01-31 12:18:21,066 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 153 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 12:18:21,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 35 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 12:18:21,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-31 12:18:21,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2022-01-31 12:18:21,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:18:21,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2022-01-31 12:18:21,079 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 25 [2022-01-31 12:18:21,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:18:21,079 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2022-01-31 12:18:21,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 14 states have internal predecessors, (43), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:18:21,080 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2022-01-31 12:18:21,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 12:18:21,083 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:18:21,083 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:18:21,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-31 12:18:21,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:18:21,323 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:18:21,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:18:21,323 INFO L85 PathProgramCache]: Analyzing trace with hash 187678327, now seen corresponding path program 2 times [2022-01-31 12:18:21,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:18:21,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416976608] [2022-01-31 12:18:21,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:18:21,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:18:21,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:18:21,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:18:21,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:18:21,465 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-01-31 12:18:21,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:18:21,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416976608] [2022-01-31 12:18:21,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416976608] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:18:21,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416370070] [2022-01-31 12:18:21,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 12:18:21,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:18:21,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:18:21,468 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 12:18:21,501 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 12:18:21,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 12:18:21,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 12:18:21,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 12:18:21,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:18:21,637 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-01-31 12:18:21,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 12:18:21,841 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-01-31 12:18:21,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416370070] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 12:18:21,842 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 12:18:21,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-01-31 12:18:21,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133079660] [2022-01-31 12:18:21,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 12:18:21,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 12:18:21,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:18:21,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 12:18:21,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 12:18:21,849 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 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 12:18:22,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:18:22,192 INFO L93 Difference]: Finished difference Result 138 states and 151 transitions. [2022-01-31 12:18:22,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 12:18:22,192 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 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 64 [2022-01-31 12:18:22,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:18:22,195 INFO L225 Difference]: With dead ends: 138 [2022-01-31 12:18:22,195 INFO L226 Difference]: Without dead ends: 138 [2022-01-31 12:18:22,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 12:18:22,197 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 250 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 12:18:22,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 36 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 12:18:22,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-01-31 12:18:22,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 89. [2022-01-31 12:18:22,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 states have internal predecessors, (86), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:18:22,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2022-01-31 12:18:22,202 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 64 [2022-01-31 12:18:22,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:18:22,202 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2022-01-31 12:18:22,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 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 12:18:22,202 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2022-01-31 12:18:22,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-01-31 12:18:22,203 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:18:22,203 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:18:22,256 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 12:18:22,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:18:22,428 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:18:22,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:18:22,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1370027761, now seen corresponding path program 3 times [2022-01-31 12:18:22,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:18:22,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126460301] [2022-01-31 12:18:22,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:18:22,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:18:22,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:18:22,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:18:22,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:18:22,735 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-01-31 12:18:22,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:18:22,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126460301] [2022-01-31 12:18:22,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126460301] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:18:22,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587607492] [2022-01-31 12:18:22,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 12:18:22,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:18:22,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:18:22,748 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 12:18:22,749 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 12:18:22,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-01-31 12:18:22,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 12:18:22,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 12:18:22,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:18:23,042 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-01-31 12:18:23,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 12:18:23,406 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-01-31 12:18:23,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587607492] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 12:18:23,409 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 12:18:23,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 15, 15] total 40 [2022-01-31 12:18:23,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193170597] [2022-01-31 12:18:23,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 12:18:23,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 12:18:23,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:18:23,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 12:18:23,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=888, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 12:18:23,412 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 40 states, 40 states have (on average 3.225) internal successors, (129), 38 states have internal predecessors, (129), 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 12:18:24,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:18:24,239 INFO L93 Difference]: Finished difference Result 208 states and 232 transitions. [2022-01-31 12:18:24,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 12:18:24,239 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.225) internal successors, (129), 38 states have internal predecessors, (129), 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 88 [2022-01-31 12:18:24,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:18:24,240 INFO L225 Difference]: With dead ends: 208 [2022-01-31 12:18:24,240 INFO L226 Difference]: Without dead ends: 182 [2022-01-31 12:18:24,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 196 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1941, Invalid=3759, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 12:18:24,243 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 456 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 309 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 12:18:24,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [456 Valid, 44 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [309 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 12:18:24,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-01-31 12:18:24,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2022-01-31 12:18:24,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.0113636363636365) internal successors, (178), 176 states have internal predecessors, (178), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:18:24,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2022-01-31 12:18:24,250 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 88 [2022-01-31 12:18:24,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:18:24,251 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2022-01-31 12:18:24,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.225) internal successors, (129), 38 states have internal predecessors, (129), 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 12:18:24,251 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2022-01-31 12:18:24,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-01-31 12:18:24,252 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:18:24,252 INFO L514 BasicCegarLoop]: trace histogram [35, 34, 34, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:18:24,281 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 12:18:24,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:18:24,458 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:18:24,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:18:24,459 INFO L85 PathProgramCache]: Analyzing trace with hash 804363235, now seen corresponding path program 4 times [2022-01-31 12:18:24,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:18:24,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23661747] [2022-01-31 12:18:24,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:18:24,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:18:24,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:18:24,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:18:24,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:18:24,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2022-01-31 12:18:24,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:18:24,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23661747] [2022-01-31 12:18:24,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23661747] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:18:24,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126008151] [2022-01-31 12:18:24,954 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 12:18:24,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:18:24,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:18:24,973 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 12:18:24,974 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 12:18:25,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 12:18:25,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 12:18:25,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-31 12:18:25,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:18:25,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2022-01-31 12:18:25,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 12:18:26,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2022-01-31 12:18:26,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126008151] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 12:18:26,643 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 12:18:26,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2022-01-31 12:18:26,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697838220] [2022-01-31 12:18:26,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 12:18:26,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-31 12:18:26,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:18:26,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-31 12:18:26,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 12:18:26,646 INFO L87 Difference]: Start difference. First operand 181 states and 182 transitions. Second operand has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 69 states have internal predecessors, (146), 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 12:18:28,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:18:28,608 INFO L93 Difference]: Finished difference Result 378 states and 411 transitions. [2022-01-31 12:18:28,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 12:18:28,609 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 69 states have internal predecessors, (146), 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 180 [2022-01-31 12:18:28,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:18:28,610 INFO L225 Difference]: With dead ends: 378 [2022-01-31 12:18:28,610 INFO L226 Difference]: Without dead ends: 378 [2022-01-31 12:18:28,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2865 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=6903, Invalid=11457, Unknown=0, NotChecked=0, Total=18360 [2022-01-31 12:18:28,613 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 930 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 447 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 930 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 447 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 12:18:28,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [930 Valid, 26 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [447 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 12:18:28,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-01-31 12:18:28,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 249. [2022-01-31 12:18:28,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 244 states have (on average 1.0081967213114753) internal successors, (246), 244 states have internal predecessors, (246), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:18:28,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 250 transitions. [2022-01-31 12:18:28,654 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 250 transitions. Word has length 180 [2022-01-31 12:18:28,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:18:28,654 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 250 transitions. [2022-01-31 12:18:28,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 69 states have internal predecessors, (146), 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 12:18:28,655 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 250 transitions. [2022-01-31 12:18:28,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-01-31 12:18:28,657 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:18:28,657 INFO L514 BasicCegarLoop]: trace histogram [66, 66, 35, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:18:28,675 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 12:18:28,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:18:28,869 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:18:28,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:18:28,870 INFO L85 PathProgramCache]: Analyzing trace with hash -820476697, now seen corresponding path program 5 times [2022-01-31 12:18:28,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:18:28,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623125135] [2022-01-31 12:18:28,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:18:28,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:18:29,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:18:30,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:18:30,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:18:30,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6107 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2022-01-31 12:18:30,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:18:30,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623125135] [2022-01-31 12:18:30,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623125135] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:18:30,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055746905] [2022-01-31 12:18:30,453 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 12:18:30,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:18:30,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:18:30,454 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 12:18:30,455 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 12:20:42,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 67 check-sat command(s) [2022-01-31 12:20:42,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 12:20:42,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 837 conjuncts, 68 conjunts are in the unsatisfiable core [2022-01-31 12:20:42,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:20:43,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6107 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2022-01-31 12:20:43,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 12:20:46,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6107 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2022-01-31 12:20:46,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055746905] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 12:20:46,210 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 12:20:46,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 69, 69] total 138 [2022-01-31 12:20:46,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631610264] [2022-01-31 12:20:46,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 12:20:46,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2022-01-31 12:20:46,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:20:46,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2022-01-31 12:20:46,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9318, Invalid=9588, Unknown=0, NotChecked=0, Total=18906 [2022-01-31 12:20:46,218 INFO L87 Difference]: Start difference. First operand 249 states and 250 transitions. Second operand has 138 states, 138 states have (on average 2.0434782608695654) internal successors, (282), 137 states have internal predecessors, (282), 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 12:20:54,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:20:54,069 INFO L93 Difference]: Finished difference Result 786 states and 887 transitions. [2022-01-31 12:20:54,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-01-31 12:20:54,070 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 2.0434782608695654) internal successors, (282), 137 states have internal predecessors, (282), 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 248 [2022-01-31 12:20:54,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:20:54,082 INFO L225 Difference]: With dead ends: 786 [2022-01-31 12:20:54,082 INFO L226 Difference]: Without dead ends: 786 [2022-01-31 12:20:54,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 700 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 270 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11518 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=27677, Invalid=46035, Unknown=0, NotChecked=0, Total=73712 [2022-01-31 12:20:54,089 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 1978 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 927 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1978 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 1753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 927 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 12:20:54,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1978 Valid, 61 Invalid, 1753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [927 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 12:20:54,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2022-01-31 12:20:54,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 385. [2022-01-31 12:20:54,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 380 states have (on average 1.0052631578947369) internal successors, (382), 380 states have internal predecessors, (382), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 12:20:54,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 386 transitions. [2022-01-31 12:20:54,098 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 386 transitions. Word has length 248 [2022-01-31 12:20:54,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:20:54,098 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 386 transitions. [2022-01-31 12:20:54,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 2.0434782608695654) internal successors, (282), 137 states have internal predecessors, (282), 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 12:20:54,099 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 386 transitions. [2022-01-31 12:20:54,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2022-01-31 12:20:54,109 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:20:54,109 INFO L514 BasicCegarLoop]: trace histogram [134, 134, 35, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:20:54,157 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 12:20:54,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:20:54,328 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:20:54,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:20:54,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1626566417, now seen corresponding path program 6 times [2022-01-31 12:20:54,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:20:54,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783368661] [2022-01-31 12:20:54,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:20:54,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:20:54,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:20:59,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:20:59,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:20:59,695 INFO L134 CoverageAnalysis]: Checked inductivity of 19707 backedges. 0 proven. 17956 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2022-01-31 12:20:59,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:20:59,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783368661] [2022-01-31 12:20:59,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783368661] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:20:59,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582671344] [2022-01-31 12:20:59,695 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 12:20:59,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:20:59,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:20:59,696 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 12:20:59,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process