/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-7968f31 [2022-03-17 14:54:35,530 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 14:54:35,532 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 14:54:35,554 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 14:54:35,555 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 14:54:35,557 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 14:54:35,561 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 14:54:35,565 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 14:54:35,567 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 14:54:35,570 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 14:54:35,571 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 14:54:35,572 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 14:54:35,572 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 14:54:35,574 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 14:54:35,575 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 14:54:35,575 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 14:54:35,576 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 14:54:35,576 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 14:54:35,579 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 14:54:35,583 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 14:54:35,585 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 14:54:35,586 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 14:54:35,586 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 14:54:35,587 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 14:54:35,588 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 14:54:35,592 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 14:54:35,598 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 14:54:35,599 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 14:54:35,600 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 14:54:35,601 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-17 14:54:35,609 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 14:54:35,609 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 14:54:35,610 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 14:54:35,611 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-17 14:54:35,611 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 14:54:35,611 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-17 14:54:35,611 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 14:54:35,611 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 14:54:35,611 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 14:54:35,611 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 14:54:35,612 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-17 14:54:35,612 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 14:54:35,612 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 14:54:35,612 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 14:54:35,612 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 14:54:35,612 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 14:54:35,612 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-17 14:54:35,612 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 14:54:35,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 14:54:35,612 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 14:54:35,612 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 14:54:35,613 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 14:54:35,613 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 14:54:35,801 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 14:54:35,824 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 14:54:35,826 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 14:54:35,827 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 14:54:35,827 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 14:54:35,828 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_4.i [2022-03-17 14:54:35,866 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1431efdfb/bdbe9d4b9d624100bc1a5c03a1a74a5e/FLAG14efebb70 [2022-03-17 14:54:36,172 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 14:54:36,173 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_4.i [2022-03-17 14:54:36,177 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1431efdfb/bdbe9d4b9d624100bc1a5c03a1a74a5e/FLAG14efebb70 [2022-03-17 14:54:36,600 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1431efdfb/bdbe9d4b9d624100bc1a5c03a1a74a5e [2022-03-17 14:54:36,602 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 14:54:36,603 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 14:54:36,604 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 14:54:36,604 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 14:54:36,606 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 14:54:36,607 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:54:36" (1/1) ... [2022-03-17 14:54:36,607 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@208d31b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:54:36, skipping insertion in model container [2022-03-17 14:54:36,608 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:54:36" (1/1) ... [2022-03-17 14:54:36,612 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 14:54:36,620 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 14:54:36,768 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] [2022-03-17 14:54:36,781 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 14:54:36,787 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 14:54:36,797 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] [2022-03-17 14:54:36,801 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 14:54:36,812 INFO L208 MainTranslator]: Completed translation [2022-03-17 14:54:36,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:54:36 WrapperNode [2022-03-17 14:54:36,813 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 14:54:36,814 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 14:54:36,814 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 14:54:36,814 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 14:54:36,822 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:54:36" (1/1) ... [2022-03-17 14:54:36,823 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:54:36" (1/1) ... [2022-03-17 14:54:36,827 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:54:36" (1/1) ... [2022-03-17 14:54:36,827 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:54:36" (1/1) ... [2022-03-17 14:54:36,838 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:54:36" (1/1) ... [2022-03-17 14:54:36,842 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:54:36" (1/1) ... [2022-03-17 14:54:36,844 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:54:36" (1/1) ... [2022-03-17 14:54:36,849 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 14:54:36,851 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 14:54:36,851 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 14:54:36,851 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 14:54:36,852 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:54:36" (1/1) ... [2022-03-17 14:54:36,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 14:54:36,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 14:54:36,877 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) [2022-03-17 14:54:36,885 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 [2022-03-17 14:54:36,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 14:54:36,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 14:54:36,906 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 14:54:36,906 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 14:54:36,906 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 14:54:36,906 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 14:54:36,906 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 14:54:36,906 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-17 14:54:36,906 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-17 14:54:36,907 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 14:54:36,907 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 14:54:36,907 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-17 14:54:36,907 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 14:54:36,907 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 14:54:36,908 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-17 14:54:36,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 14:54:36,908 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 14:54:36,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 14:54:36,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 14:54:36,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 14:54:36,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 14:54:36,972 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 14:54:36,974 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 14:54:37,098 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 14:54:37,101 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 14:54:37,102 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-17 14:54:37,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 02:54:37 BoogieIcfgContainer [2022-03-17 14:54:37,103 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 14:54:37,104 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 14:54:37,104 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 14:54:37,118 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 14:54:37,120 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 02:54:37" (1/1) ... [2022-03-17 14:54:37,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 02:54:37 BasicIcfg [2022-03-17 14:54:37,131 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 14:54:37,132 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 14:54:37,132 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 14:54:37,149 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 14:54:37,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 02:54:36" (1/4) ... [2022-03-17 14:54:37,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d54b8e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:54:37, skipping insertion in model container [2022-03-17 14:54:37,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:54:36" (2/4) ... [2022-03-17 14:54:37,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d54b8e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:54:37, skipping insertion in model container [2022-03-17 14:54:37,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 02:54:37" (3/4) ... [2022-03-17 14:54:37,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d54b8e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 02:54:37, skipping insertion in model container [2022-03-17 14:54:37,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 02:54:37" (4/4) ... [2022-03-17 14:54:37,152 INFO L111 eAbstractionObserver]: Analyzing ICFG array_4.iJordan [2022-03-17 14:54:37,156 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-17 14:54:37,157 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 14:54:37,204 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 14:54:37,210 INFO L340 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 [2022-03-17 14:54:37,210 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 14:54:37,221 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) [2022-03-17 14:54:37,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-17 14:54:37,235 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:54:37,235 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:54:37,236 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:54:37,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:54:37,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1408461327, now seen corresponding path program 1 times [2022-03-17 14:54:37,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:54:37,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803843496] [2022-03-17 14:54:37,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:54:37,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:54:37,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:54:37,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:54:37,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:54:37,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 14:54:37,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:54:37,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803843496] [2022-03-17 14:54:37,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803843496] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 14:54:37,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 14:54:37,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 14:54:37,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71364321] [2022-03-17 14:54:37,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 14:54:37,414 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 14:54:37,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 14:54:37,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 14:54:37,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 14:54:37,438 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) [2022-03-17 14:54:37,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 14:54:37,475 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2022-03-17 14:54:37,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 14:54:37,478 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 [2022-03-17 14:54:37,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 14:54:37,485 INFO L225 Difference]: With dead ends: 24 [2022-03-17 14:54:37,485 INFO L226 Difference]: Without dead ends: 17 [2022-03-17 14:54:37,486 INFO L911 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 [2022-03-17 14:54:37,490 INFO L912 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 [2022-03-17 14:54:37,490 INFO L913 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] [2022-03-17 14:54:37,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-17 14:54:37,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-03-17 14:54:37,512 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) [2022-03-17 14:54:37,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-03-17 14:54:37,513 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2022-03-17 14:54:37,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 14:54:37,513 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-03-17 14:54:37,514 INFO L479 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) [2022-03-17 14:54:37,514 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-03-17 14:54:37,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-17 14:54:37,514 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:54:37,514 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:54:37,515 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 14:54:37,515 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:54:37,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:54:37,516 INFO L85 PathProgramCache]: Analyzing trace with hash 999614691, now seen corresponding path program 1 times [2022-03-17 14:54:37,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:54:37,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626817725] [2022-03-17 14:54:37,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:54:37,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:54:37,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:54:37,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:54:37,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:54:37,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 14:54:37,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:54:37,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626817725] [2022-03-17 14:54:37,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626817725] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 14:54:37,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 14:54:37,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 14:54:37,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398197794] [2022-03-17 14:54:37,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 14:54:37,578 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 14:54:37,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 14:54:37,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 14:54:37,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 14:54:37,579 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) [2022-03-17 14:54:37,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 14:54:37,607 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2022-03-17 14:54:37,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 14:54:37,607 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 [2022-03-17 14:54:37,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 14:54:37,609 INFO L225 Difference]: With dead ends: 23 [2022-03-17 14:54:37,609 INFO L226 Difference]: Without dead ends: 23 [2022-03-17 14:54:37,609 INFO L911 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 [2022-03-17 14:54:37,610 INFO L912 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 [2022-03-17 14:54:37,610 INFO L913 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] [2022-03-17 14:54:37,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-17 14:54:37,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2022-03-17 14:54:37,613 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) [2022-03-17 14:54:37,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-03-17 14:54:37,613 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2022-03-17 14:54:37,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 14:54:37,613 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-03-17 14:54:37,614 INFO L479 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) [2022-03-17 14:54:37,614 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-03-17 14:54:37,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-17 14:54:37,614 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:54:37,614 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:54:37,614 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-17 14:54:37,614 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:54:37,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:54:37,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1202562811, now seen corresponding path program 1 times [2022-03-17 14:54:37,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:54:37,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628364312] [2022-03-17 14:54:37,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:54:37,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:54:37,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:54:37,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:54:37,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:54:37,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 14:54:37,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:54:37,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628364312] [2022-03-17 14:54:37,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628364312] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 14:54:37,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623222667] [2022-03-17 14:54:37,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:54:37,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:54:37,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 14:54:37,661 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) [2022-03-17 14:54:37,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 14:54:37,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:54:37,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-17 14:54:37,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 14:54:37,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 14:54:37,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 14:54:37,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 14:54:37,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623222667] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 14:54:37,892 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 14:54:37,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-17 14:54:37,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785174024] [2022-03-17 14:54:37,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 14:54:37,893 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 14:54:37,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 14:54:37,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 14:54:37,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-17 14:54:37,893 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) [2022-03-17 14:54:38,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 14:54:38,001 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2022-03-17 14:54:38,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-17 14:54:38,002 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 [2022-03-17 14:54:38,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 14:54:38,004 INFO L225 Difference]: With dead ends: 40 [2022-03-17 14:54:38,004 INFO L226 Difference]: Without dead ends: 40 [2022-03-17 14:54:38,007 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-03-17 14:54:38,009 INFO L912 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 [2022-03-17 14:54:38,010 INFO L913 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] [2022-03-17 14:54:38,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-17 14:54:38,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 24. [2022-03-17 14:54:38,016 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) [2022-03-17 14:54:38,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2022-03-17 14:54:38,017 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 16 [2022-03-17 14:54:38,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 14:54:38,017 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2022-03-17 14:54:38,018 INFO L479 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) [2022-03-17 14:54:38,018 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2022-03-17 14:54:38,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-17 14:54:38,019 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:54:38,019 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:54:38,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-17 14:54:38,236 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:54:38,237 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:54:38,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:54:38,237 INFO L85 PathProgramCache]: Analyzing trace with hash -111794581, now seen corresponding path program 2 times [2022-03-17 14:54:38,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:54:38,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491905595] [2022-03-17 14:54:38,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:54:38,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:54:38,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:54:38,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:54:38,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:54:38,311 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-17 14:54:38,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:54:38,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491905595] [2022-03-17 14:54:38,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491905595] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 14:54:38,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 14:54:38,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 14:54:38,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243356460] [2022-03-17 14:54:38,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 14:54:38,312 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 14:54:38,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 14:54:38,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 14:54:38,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-17 14:54:38,314 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) [2022-03-17 14:54:38,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 14:54:38,366 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2022-03-17 14:54:38,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 14:54:38,367 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 [2022-03-17 14:54:38,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 14:54:38,369 INFO L225 Difference]: With dead ends: 30 [2022-03-17 14:54:38,369 INFO L226 Difference]: Without dead ends: 27 [2022-03-17 14:54:38,369 INFO L911 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 [2022-03-17 14:54:38,373 INFO L912 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 [2022-03-17 14:54:38,373 INFO L913 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] [2022-03-17 14:54:38,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-17 14:54:38,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-03-17 14:54:38,392 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) [2022-03-17 14:54:38,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2022-03-17 14:54:38,392 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 22 [2022-03-17 14:54:38,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 14:54:38,393 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2022-03-17 14:54:38,393 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 14:54:38,393 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2022-03-17 14:54:38,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-17 14:54:38,393 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:54:38,393 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:54:38,393 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-17 14:54:38,394 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:54:38,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:54:38,394 INFO L85 PathProgramCache]: Analyzing trace with hash 550607117, now seen corresponding path program 1 times [2022-03-17 14:54:38,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:54:38,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917793220] [2022-03-17 14:54:38,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:54:38,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:54:38,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:54:38,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:54:38,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:54:38,466 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-17 14:54:38,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:54:38,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917793220] [2022-03-17 14:54:38,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917793220] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 14:54:38,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073238577] [2022-03-17 14:54:38,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:54:38,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:54:38,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 14:54:38,469 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) [2022-03-17 14:54:38,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 14:54:38,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:54:38,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-17 14:54:38,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 14:54:38,572 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-17 14:54:38,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 14:54:38,652 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-17 14:54:38,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073238577] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 14:54:38,652 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 14:54:38,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-03-17 14:54:38,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27117576] [2022-03-17 14:54:38,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 14:54:38,653 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-17 14:54:38,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 14:54:38,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-17 14:54:38,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2022-03-17 14:54:38,654 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) [2022-03-17 14:54:38,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 14:54:38,872 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2022-03-17 14:54:38,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-17 14:54:38,873 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 [2022-03-17 14:54:38,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 14:54:38,873 INFO L225 Difference]: With dead ends: 77 [2022-03-17 14:54:38,873 INFO L226 Difference]: Without dead ends: 66 [2022-03-17 14:54:38,874 INFO L911 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 [2022-03-17 14:54:38,874 INFO L912 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 [2022-03-17 14:54:38,875 INFO L913 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] [2022-03-17 14:54:38,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-17 14:54:38,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2022-03-17 14:54:38,878 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) [2022-03-17 14:54:38,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2022-03-17 14:54:38,879 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 25 [2022-03-17 14:54:38,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 14:54:38,879 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2022-03-17 14:54:38,879 INFO L479 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) [2022-03-17 14:54:38,879 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2022-03-17 14:54:38,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-17 14:54:38,880 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:54:38,880 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:54:38,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 14:54:39,093 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:54:39,094 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:54:39,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:54:39,094 INFO L85 PathProgramCache]: Analyzing trace with hash 187678327, now seen corresponding path program 2 times [2022-03-17 14:54:39,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:54:39,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304071973] [2022-03-17 14:54:39,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:54:39,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:54:39,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:54:39,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:54:39,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:54:39,242 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-03-17 14:54:39,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:54:39,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304071973] [2022-03-17 14:54:39,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304071973] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 14:54:39,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310558592] [2022-03-17 14:54:39,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 14:54:39,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:54:39,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 14:54:39,255 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) [2022-03-17 14:54:39,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 14:54:39,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 14:54:39,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 14:54:39,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-17 14:54:39,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 14:54:39,429 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-03-17 14:54:39,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 14:54:39,755 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-03-17 14:54:39,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310558592] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 14:54:39,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 14:54:39,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-03-17 14:54:39,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576557571] [2022-03-17 14:54:39,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 14:54:39,757 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-17 14:54:39,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 14:54:39,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-17 14:54:39,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-03-17 14:54:39,758 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) [2022-03-17 14:54:40,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 14:54:40,178 INFO L93 Difference]: Finished difference Result 138 states and 151 transitions. [2022-03-17 14:54:40,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-17 14:54:40,178 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 [2022-03-17 14:54:40,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 14:54:40,183 INFO L225 Difference]: With dead ends: 138 [2022-03-17 14:54:40,183 INFO L226 Difference]: Without dead ends: 138 [2022-03-17 14:54:40,184 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2022-03-17 14:54:40,185 INFO L912 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 [2022-03-17 14:54:40,185 INFO L913 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] [2022-03-17 14:54:40,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-03-17 14:54:40,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 89. [2022-03-17 14:54:40,200 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) [2022-03-17 14:54:40,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2022-03-17 14:54:40,205 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 64 [2022-03-17 14:54:40,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 14:54:40,205 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2022-03-17 14:54:40,205 INFO L479 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) [2022-03-17 14:54:40,205 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2022-03-17 14:54:40,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-03-17 14:54:40,207 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:54:40,207 INFO L500 BasicCegarLoop]: trace histogram [22, 22, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:54:40,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-17 14:54:40,438 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:54:40,438 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:54:40,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:54:40,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1370027761, now seen corresponding path program 3 times [2022-03-17 14:54:40,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:54:40,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276749498] [2022-03-17 14:54:40,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:54:40,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:54:40,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:54:40,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:54:40,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:54:40,734 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-03-17 14:54:40,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:54:40,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276749498] [2022-03-17 14:54:40,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276749498] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 14:54:40,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889533801] [2022-03-17 14:54:40,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 14:54:40,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:54:40,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 14:54:40,744 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) [2022-03-17 14:54:40,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-17 14:54:40,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-03-17 14:54:40,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 14:54:40,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-17 14:54:40,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 14:54:41,076 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-03-17 14:54:41,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 14:54:41,444 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-03-17 14:54:41,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889533801] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 14:54:41,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 14:54:41,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 15, 15] total 40 [2022-03-17 14:54:41,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855720026] [2022-03-17 14:54:41,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 14:54:41,445 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-17 14:54:41,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 14:54:41,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-17 14:54:41,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=888, Unknown=0, NotChecked=0, Total=1560 [2022-03-17 14:54:41,446 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) [2022-03-17 14:54:42,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 14:54:42,262 INFO L93 Difference]: Finished difference Result 208 states and 232 transitions. [2022-03-17 14:54:42,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-17 14:54:42,262 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 [2022-03-17 14:54:42,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 14:54:42,263 INFO L225 Difference]: With dead ends: 208 [2022-03-17 14:54:42,263 INFO L226 Difference]: Without dead ends: 182 [2022-03-17 14:54:42,265 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 196 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1941, Invalid=3759, Unknown=0, NotChecked=0, Total=5700 [2022-03-17 14:54:42,265 INFO L912 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, 0.3s IncrementalHoareTripleChecker+Time [2022-03-17 14:54:42,265 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [456 Valid, 44 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [309 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-17 14:54:42,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-03-17 14:54:42,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2022-03-17 14:54:42,270 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) [2022-03-17 14:54:42,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2022-03-17 14:54:42,270 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 88 [2022-03-17 14:54:42,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 14:54:42,271 INFO L478 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2022-03-17 14:54:42,271 INFO L479 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) [2022-03-17 14:54:42,271 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2022-03-17 14:54:42,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-03-17 14:54:42,272 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:54:42,272 INFO L500 BasicCegarLoop]: trace histogram [35, 34, 34, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:54:42,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-17 14:54:42,490 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:54:42,490 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:54:42,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:54:42,491 INFO L85 PathProgramCache]: Analyzing trace with hash 804363235, now seen corresponding path program 4 times [2022-03-17 14:54:42,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:54:42,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859719861] [2022-03-17 14:54:42,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:54:42,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:54:42,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:54:43,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:54:43,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:54:43,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2022-03-17 14:54:43,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:54:43,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859719861] [2022-03-17 14:54:43,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859719861] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 14:54:43,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329632981] [2022-03-17 14:54:43,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-17 14:54:43,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:54:43,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 14:54:43,060 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) [2022-03-17 14:54:43,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-17 14:54:43,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-17 14:54:43,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 14:54:43,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-17 14:54:43,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 14:54:43,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2022-03-17 14:54:43,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 14:54:44,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2022-03-17 14:54:44,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329632981] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 14:54:44,658 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 14:54:44,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2022-03-17 14:54:44,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452518847] [2022-03-17 14:54:44,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 14:54:44,658 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-03-17 14:54:44,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 14:54:44,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-03-17 14:54:44,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-03-17 14:54:44,661 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) [2022-03-17 14:54:46,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 14:54:46,644 INFO L93 Difference]: Finished difference Result 378 states and 411 transitions. [2022-03-17 14:54:46,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-17 14:54:46,645 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 [2022-03-17 14:54:46,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 14:54:46,646 INFO L225 Difference]: With dead ends: 378 [2022-03-17 14:54:46,646 INFO L226 Difference]: Without dead ends: 378 [2022-03-17 14:54:46,650 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2865 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6903, Invalid=11457, Unknown=0, NotChecked=0, Total=18360 [2022-03-17 14:54:46,650 INFO L912 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 [2022-03-17 14:54:46,650 INFO L913 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] [2022-03-17 14:54:46,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-03-17 14:54:46,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 249. [2022-03-17 14:54:46,655 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) [2022-03-17 14:54:46,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 250 transitions. [2022-03-17 14:54:46,656 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 250 transitions. Word has length 180 [2022-03-17 14:54:46,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 14:54:46,656 INFO L478 AbstractCegarLoop]: Abstraction has 249 states and 250 transitions. [2022-03-17 14:54:46,657 INFO L479 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) [2022-03-17 14:54:46,657 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 250 transitions. [2022-03-17 14:54:46,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-03-17 14:54:46,658 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:54:46,659 INFO L500 BasicCegarLoop]: trace histogram [66, 66, 35, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:54:46,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-17 14:54:46,876 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:54:46,876 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:54:46,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:54:46,877 INFO L85 PathProgramCache]: Analyzing trace with hash -820476697, now seen corresponding path program 5 times [2022-03-17 14:54:46,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:54:46,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440573735] [2022-03-17 14:54:46,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:54:46,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:54:46,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:54:48,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:54:48,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:54:48,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6107 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2022-03-17 14:54:48,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:54:48,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440573735] [2022-03-17 14:54:48,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440573735] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 14:54:48,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8776464] [2022-03-17 14:54:48,441 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-17 14:54:48,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:54:48,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 14:54:48,443 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) [2022-03-17 14:54:48,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-17 14:56:54,608 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 67 check-sat command(s) [2022-03-17 14:56:54,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 14:56:54,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 837 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-17 14:56:54,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 14:56:55,109 INFO L134 CoverageAnalysis]: Checked inductivity of 6107 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2022-03-17 14:56:55,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 14:56:58,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6107 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2022-03-17 14:56:58,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8776464] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 14:56:58,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 14:56:58,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 69, 69] total 138 [2022-03-17 14:56:58,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721352976] [2022-03-17 14:56:58,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 14:56:58,219 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2022-03-17 14:56:58,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 14:56:58,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2022-03-17 14:56:58,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9318, Invalid=9588, Unknown=0, NotChecked=0, Total=18906 [2022-03-17 14:56:58,224 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) [2022-03-17 14:57:05,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 14:57:05,629 INFO L93 Difference]: Finished difference Result 786 states and 887 transitions. [2022-03-17 14:57:05,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-03-17 14:57:05,630 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 [2022-03-17 14:57:05,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 14:57:05,633 INFO L225 Difference]: With dead ends: 786 [2022-03-17 14:57:05,633 INFO L226 Difference]: Without dead ends: 786 [2022-03-17 14:57:05,644 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 700 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 270 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11518 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=27677, Invalid=46035, Unknown=0, NotChecked=0, Total=73712 [2022-03-17 14:57:05,645 INFO L912 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 [2022-03-17 14:57:05,645 INFO L913 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] [2022-03-17 14:57:05,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2022-03-17 14:57:05,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 385. [2022-03-17 14:57:05,651 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) [2022-03-17 14:57:05,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 386 transitions. [2022-03-17 14:57:05,652 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 386 transitions. Word has length 248 [2022-03-17 14:57:05,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 14:57:05,653 INFO L478 AbstractCegarLoop]: Abstraction has 385 states and 386 transitions. [2022-03-17 14:57:05,653 INFO L479 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) [2022-03-17 14:57:05,653 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 386 transitions. [2022-03-17 14:57:05,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2022-03-17 14:57:05,656 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 14:57:05,656 INFO L500 BasicCegarLoop]: trace histogram [134, 134, 35, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 14:57:05,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-17 14:57:05,879 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:57:05,879 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 14:57:05,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 14:57:05,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1626566417, now seen corresponding path program 6 times [2022-03-17 14:57:05,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 14:57:05,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811221563] [2022-03-17 14:57:05,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 14:57:05,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 14:57:06,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:57:09,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 14:57:09,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 14:57:09,469 INFO L134 CoverageAnalysis]: Checked inductivity of 19707 backedges. 0 proven. 17956 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2022-03-17 14:57:09,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 14:57:09,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811221563] [2022-03-17 14:57:09,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811221563] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 14:57:09,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86578720] [2022-03-17 14:57:09,470 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-17 14:57:09,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 14:57:09,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 14:57:09,475 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) [2022-03-17 14:57:09,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process