/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-crafted/simple_array_index_value_2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 04:46:11,681 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 04:46:11,682 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 04:46:11,727 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 04:46:11,727 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 04:46:11,728 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 04:46:11,730 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 04:46:11,734 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 04:46:11,736 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 04:46:11,739 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 04:46:11,740 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 04:46:11,741 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 04:46:11,741 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 04:46:11,743 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 04:46:11,744 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 04:46:11,747 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 04:46:11,748 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 04:46:11,748 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 04:46:11,750 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 04:46:11,755 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 04:46:11,757 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 04:46:11,758 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 04:46:11,759 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 04:46:11,760 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 04:46:11,761 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 04:46:11,766 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 04:46:11,772 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 04:46:11,773 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 04:46:11,774 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 04:46:11,775 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-04-06 04:46:11,785 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 04:46:11,786 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 04:46:11,787 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 04:46:11,787 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 04:46:11,787 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 04:46:11,787 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 04:46:11,787 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 04:46:11,787 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 04:46:11,787 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 04:46:11,788 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 04:46:11,788 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 04:46:11,788 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 04:46:11,788 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 04:46:11,788 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 04:46:11,788 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 04:46:11,789 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 04:46:11,789 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 04:46:11,789 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 04:46:11,789 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 04:46:11,789 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 04:46:11,789 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 04:46:11,790 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 04:46:11,790 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 04:46:12,002 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 04:46:12,019 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 04:46:12,021 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 04:46:12,022 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 04:46:12,025 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 04:46:12,026 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i [2022-04-06 04:46:12,078 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/887c1e902/d6632ce35bc343ce9b6cc09a8e40f5ef/FLAGb3fdb0391 [2022-04-06 04:46:12,443 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 04:46:12,443 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i [2022-04-06 04:46:12,449 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/887c1e902/d6632ce35bc343ce9b6cc09a8e40f5ef/FLAGb3fdb0391 [2022-04-06 04:46:12,460 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/887c1e902/d6632ce35bc343ce9b6cc09a8e40f5ef [2022-04-06 04:46:12,462 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 04:46:12,463 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 04:46:12,465 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 04:46:12,465 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 04:46:12,468 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 04:46:12,468 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 04:46:12" (1/1) ... [2022-04-06 04:46:12,469 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60f4b12c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:46:12, skipping insertion in model container [2022-04-06 04:46:12,469 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 04:46:12" (1/1) ... [2022-04-06 04:46:12,474 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 04:46:12,484 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 04:46:12,621 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-crafted/simple_array_index_value_2.i[919,932] [2022-04-06 04:46:12,628 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 04:46:12,633 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 04:46:12,640 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-crafted/simple_array_index_value_2.i[919,932] [2022-04-06 04:46:12,643 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 04:46:12,651 INFO L208 MainTranslator]: Completed translation [2022-04-06 04:46:12,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:46:12 WrapperNode [2022-04-06 04:46:12,652 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 04:46:12,652 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 04:46:12,652 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 04:46:12,653 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 04:46:12,662 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:46:12" (1/1) ... [2022-04-06 04:46:12,663 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:46:12" (1/1) ... [2022-04-06 04:46:12,669 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:46:12" (1/1) ... [2022-04-06 04:46:12,669 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:46:12" (1/1) ... [2022-04-06 04:46:12,676 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:46:12" (1/1) ... [2022-04-06 04:46:12,678 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:46:12" (1/1) ... [2022-04-06 04:46:12,679 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:46:12" (1/1) ... [2022-04-06 04:46:12,684 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 04:46:12,685 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 04:46:12,685 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 04:46:12,685 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 04:46:12,686 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:46:12" (1/1) ... [2022-04-06 04:46:12,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 04:46:12,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 04:46:12,719 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 04:46:12,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 04:46:12,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 04:46:12,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 04:46:12,754 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 04:46:12,754 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 04:46:12,754 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 04:46:12,754 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 04:46:12,754 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 04:46:12,754 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 04:46:12,754 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-04-06 04:46:12,754 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-04-06 04:46:12,754 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 04:46:12,754 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 04:46:12,755 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 04:46:12,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 04:46:12,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-06 04:46:12,755 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 04:46:12,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-04-06 04:46:12,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 04:46:12,755 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 04:46:12,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 04:46:12,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 04:46:12,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 04:46:12,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 04:46:12,800 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 04:46:12,801 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 04:46:12,877 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 04:46:12,882 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 04:46:12,882 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-06 04:46:12,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 04:46:12 BoogieIcfgContainer [2022-04-06 04:46:12,883 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 04:46:12,884 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 04:46:12,884 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 04:46:12,885 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 04:46:12,887 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 04:46:12" (1/1) ... [2022-04-06 04:46:12,888 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-04-06 04:46:12,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 04:46:12 BasicIcfg [2022-04-06 04:46:12,899 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 04:46:12,900 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 04:46:12,900 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 04:46:12,912 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 04:46:12,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 04:46:12" (1/4) ... [2022-04-06 04:46:12,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@590a77c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 04:46:12, skipping insertion in model container [2022-04-06 04:46:12,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:46:12" (2/4) ... [2022-04-06 04:46:12,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@590a77c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 04:46:12, skipping insertion in model container [2022-04-06 04:46:12,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 04:46:12" (3/4) ... [2022-04-06 04:46:12,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@590a77c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 04:46:12, skipping insertion in model container [2022-04-06 04:46:12,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 04:46:12" (4/4) ... [2022-04-06 04:46:12,915 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_2.iJordan [2022-04-06 04:46:12,918 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-04-06 04:46:12,918 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 04:46:12,951 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 04:46:12,955 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 [2022-04-06 04:46:12,955 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 04:46:12,966 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 04:46:12,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-04-06 04:46:12,972 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 04:46:12,973 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 04:46:12,973 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 04:46:12,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 04:46:12,977 INFO L85 PathProgramCache]: Analyzing trace with hash -183287108, now seen corresponding path program 1 times [2022-04-06 04:46:12,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 04:46:12,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671251611] [2022-04-06 04:46:12,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 04:46:12,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 04:46:13,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:13,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 04:46:13,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:13,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 04:46:13,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 04:46:13,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671251611] [2022-04-06 04:46:13,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671251611] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 04:46:13,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 04:46:13,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 04:46:13,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050220452] [2022-04-06 04:46:13,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 04:46:13,151 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 04:46:13,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 04:46:13,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 04:46:13,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 04:46:13,169 INFO L87 Difference]: Start difference. First operand has 30 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 04:46:13,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 04:46:13,258 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2022-04-06 04:46:13,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 04:46:13,260 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-04-06 04:46:13,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 04:46:13,266 INFO L225 Difference]: With dead ends: 38 [2022-04-06 04:46:13,266 INFO L226 Difference]: Without dead ends: 33 [2022-04-06 04:46:13,268 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 04:46:13,270 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 28 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 04:46:13,271 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 33 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 04:46:13,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-06 04:46:13,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2022-04-06 04:46:13,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 04:46:13,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2022-04-06 04:46:13,293 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 13 [2022-04-06 04:46:13,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 04:46:13,293 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2022-04-06 04:46:13,294 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 04:46:13,294 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2022-04-06 04:46:13,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-06 04:46:13,294 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 04:46:13,294 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 04:46:13,294 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 04:46:13,295 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 04:46:13,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 04:46:13,295 INFO L85 PathProgramCache]: Analyzing trace with hash 364957256, now seen corresponding path program 1 times [2022-04-06 04:46:13,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 04:46:13,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34780165] [2022-04-06 04:46:13,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 04:46:13,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 04:46:13,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:13,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 04:46:13,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:13,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 04:46:13,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:13,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 04:46:13,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 04:46:13,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34780165] [2022-04-06 04:46:13,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34780165] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 04:46:13,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464635820] [2022-04-06 04:46:13,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 04:46:13,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 04:46:13,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 04:46:13,389 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 04:46:13,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 04:46:13,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:13,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 04:46:13,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 04:46:13,585 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-04-06 04:46:13,685 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-04-06 04:46:13,686 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 22 [2022-04-06 04:46:13,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 04:46:13,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 04:46:13,983 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 41 [2022-04-06 04:46:13,994 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 04:46:13,994 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 88 [2022-04-06 04:46:14,083 INFO L356 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2022-04-06 04:46:14,083 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 336 treesize of output 315 [2022-04-06 04:46:14,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 04:46:14,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464635820] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 04:46:14,427 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 04:46:14,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 11, 12] total 20 [2022-04-06 04:46:14,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425431074] [2022-04-06 04:46:14,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 04:46:14,429 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 04:46:14,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 04:46:14,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 04:46:14,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-04-06 04:46:14,430 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 20 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-06 04:46:14,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 04:46:14,763 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2022-04-06 04:46:14,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 04:46:14,764 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 21 [2022-04-06 04:46:14,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 04:46:14,765 INFO L225 Difference]: With dead ends: 41 [2022-04-06 04:46:14,765 INFO L226 Difference]: Without dead ends: 41 [2022-04-06 04:46:14,766 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2022-04-06 04:46:14,766 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 36 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 04:46:14,767 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 79 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 04:46:14,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-04-06 04:46:14,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2022-04-06 04:46:14,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 04:46:14,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-04-06 04:46:14,770 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 21 [2022-04-06 04:46:14,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 04:46:14,770 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-04-06 04:46:14,771 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-06 04:46:14,771 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-04-06 04:46:14,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 04:46:14,772 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 04:46:14,772 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 04:46:14,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 04:46:14,972 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 04:46:14,973 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 04:46:14,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 04:46:14,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1998589396, now seen corresponding path program 2 times [2022-04-06 04:46:14,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 04:46:14,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768750628] [2022-04-06 04:46:14,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 04:46:14,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 04:46:14,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:15,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 04:46:15,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:15,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 04:46:15,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:15,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 04:46:15,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:15,058 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 04:46:15,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 04:46:15,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768750628] [2022-04-06 04:46:15,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768750628] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 04:46:15,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118934666] [2022-04-06 04:46:15,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 04:46:15,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 04:46:15,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 04:46:15,060 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 04:46:15,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 04:46:15,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 04:46:15,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 04:46:15,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 04:46:15,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 04:46:15,150 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-04-06 04:46:15,386 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-04-06 04:46:15,387 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 48 [2022-04-06 04:46:15,589 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-04-06 04:46:15,590 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 22 [2022-04-06 04:46:15,715 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 04:46:15,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 04:46:19,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118934666] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 04:46:19,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 04:46:19,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 16] total 19 [2022-04-06 04:46:19,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060868210] [2022-04-06 04:46:19,373 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 04:46:19,373 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 04:46:19,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 04:46:19,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 04:46:19,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=470, Unknown=2, NotChecked=0, Total=552 [2022-04-06 04:46:19,374 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 19 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-06 04:46:19,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 04:46:19,926 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2022-04-06 04:46:19,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 04:46:19,927 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 29 [2022-04-06 04:46:19,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 04:46:19,928 INFO L225 Difference]: With dead ends: 55 [2022-04-06 04:46:19,929 INFO L226 Difference]: Without dead ends: 55 [2022-04-06 04:46:19,929 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=296, Invalid=1682, Unknown=2, NotChecked=0, Total=1980 [2022-04-06 04:46:19,930 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 56 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 04:46:19,930 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 74 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 216 Invalid, 0 Unknown, 82 Unchecked, 0.1s Time] [2022-04-06 04:46:19,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-04-06 04:46:19,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2022-04-06 04:46:19,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.064516129032258) internal successors, (33), 32 states have internal predecessors, (33), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-06 04:46:19,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2022-04-06 04:46:19,935 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 29 [2022-04-06 04:46:19,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 04:46:19,935 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2022-04-06 04:46:19,935 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-04-06 04:46:19,935 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2022-04-06 04:46:19,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 04:46:19,936 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 04:46:19,936 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 04:46:19,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 04:46:20,151 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-06 04:46:20,152 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 04:46:20,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 04:46:20,152 INFO L85 PathProgramCache]: Analyzing trace with hash 483843889, now seen corresponding path program 1 times [2022-04-06 04:46:20,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 04:46:20,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112490930] [2022-04-06 04:46:20,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 04:46:20,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 04:46:20,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:20,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 04:46:20,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:20,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 04:46:20,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:20,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 04:46:20,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:20,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 04:46:20,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:20,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 04:46:20,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:20,261 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-04-06 04:46:20,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 04:46:20,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112490930] [2022-04-06 04:46:20,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112490930] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 04:46:20,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113616287] [2022-04-06 04:46:20,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 04:46:20,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 04:46:20,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 04:46:20,262 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 04:46:20,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 04:46:20,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:20,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 04:46:20,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 04:46:20,407 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 53 [2022-04-06 04:46:20,413 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 95 [2022-04-06 04:46:22,234 INFO L356 Elim1Store]: treesize reduction 39, result has 39.1 percent of original size [2022-04-06 04:46:22,234 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 57 [2022-04-06 04:46:23,283 INFO L356 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2022-04-06 04:46:23,283 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 21 [2022-04-06 04:46:23,393 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-06 04:46:23,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 04:46:29,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113616287] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 04:46:29,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 04:46:29,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 18] total 21 [2022-04-06 04:46:29,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650733483] [2022-04-06 04:46:29,839 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 04:46:29,839 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 04:46:29,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 04:46:29,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 04:46:29,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=598, Unknown=3, NotChecked=0, Total=702 [2022-04-06 04:46:29,840 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 21 states, 19 states have (on average 2.526315789473684) internal successors, (48), 17 states have internal predecessors, (48), 8 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-04-06 04:46:30,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 04:46:30,287 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2022-04-06 04:46:30,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 04:46:30,288 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.526315789473684) internal successors, (48), 17 states have internal predecessors, (48), 8 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 45 [2022-04-06 04:46:30,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 04:46:30,292 INFO L225 Difference]: With dead ends: 66 [2022-04-06 04:46:30,292 INFO L226 Difference]: Without dead ends: 66 [2022-04-06 04:46:30,294 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=205, Invalid=1352, Unknown=3, NotChecked=0, Total=1560 [2022-04-06 04:46:30,297 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 42 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 04:46:30,298 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 132 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 174 Invalid, 0 Unknown, 117 Unchecked, 0.1s Time] [2022-04-06 04:46:30,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-04-06 04:46:30,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2022-04-06 04:46:30,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 44 states have internal predecessors, (45), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 04:46:30,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2022-04-06 04:46:30,305 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 45 [2022-04-06 04:46:30,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 04:46:30,306 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2022-04-06 04:46:30,306 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.526315789473684) internal successors, (48), 17 states have internal predecessors, (48), 8 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-04-06 04:46:30,306 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2022-04-06 04:46:30,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 04:46:30,307 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 04:46:30,307 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 04:46:30,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 04:46:30,525 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 04:46:30,526 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 04:46:30,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 04:46:30,526 INFO L85 PathProgramCache]: Analyzing trace with hash -926913650, now seen corresponding path program 2 times [2022-04-06 04:46:30,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 04:46:30,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236477510] [2022-04-06 04:46:30,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 04:46:30,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 04:46:30,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:30,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 04:46:30,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:30,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 04:46:30,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:30,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 04:46:30,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:30,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 04:46:30,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:30,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 04:46:30,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:30,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 04:46:30,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:30,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 04:46:30,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:30,662 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 04:46:30,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 04:46:30,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236477510] [2022-04-06 04:46:30,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236477510] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 04:46:30,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023870702] [2022-04-06 04:46:30,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 04:46:30,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 04:46:30,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 04:46:30,665 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 04:46:30,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 04:46:30,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 04:46:30,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 04:46:30,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 04:46:30,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 04:46:30,821 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 53 [2022-04-06 04:46:30,825 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 95 [2022-04-06 04:46:30,860 INFO L356 Elim1Store]: treesize reduction 41, result has 2.4 percent of original size [2022-04-06 04:46:30,861 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 100 treesize of output 28 [2022-04-06 04:46:32,673 INFO L356 Elim1Store]: treesize reduction 39, result has 39.1 percent of original size [2022-04-06 04:46:32,673 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 57 [2022-04-06 04:46:33,771 INFO L356 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2022-04-06 04:46:33,771 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 21 [2022-04-06 04:46:33,875 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 18 proven. 38 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 04:46:33,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 04:46:37,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023870702] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 04:46:37,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 04:46:37,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 20] total 23 [2022-04-06 04:46:37,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63577891] [2022-04-06 04:46:37,946 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 04:46:37,946 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 04:46:37,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 04:46:37,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 04:46:37,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=749, Unknown=6, NotChecked=0, Total=870 [2022-04-06 04:46:37,947 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 23 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 19 states have internal predecessors, (54), 10 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2022-04-06 04:46:40,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 04:46:40,823 INFO L93 Difference]: Finished difference Result 86 states and 90 transitions. [2022-04-06 04:46:40,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 04:46:40,824 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 19 states have internal predecessors, (54), 10 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) Word has length 61 [2022-04-06 04:46:40,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 04:46:40,824 INFO L225 Difference]: With dead ends: 86 [2022-04-06 04:46:40,825 INFO L226 Difference]: Without dead ends: 86 [2022-04-06 04:46:40,825 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 72 SyntacticMatches, 8 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=238, Invalid=1736, Unknown=6, NotChecked=0, Total=1980 [2022-04-06 04:46:40,826 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 55 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 04:46:40,826 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 157 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 311 Invalid, 0 Unknown, 169 Unchecked, 0.2s Time] [2022-04-06 04:46:40,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-04-06 04:46:40,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2022-04-06 04:46:40,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 56 states have internal predecessors, (57), 11 states have call successors, (11), 10 states have call predecessors, (11), 9 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 04:46:40,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2022-04-06 04:46:40,833 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 61 [2022-04-06 04:46:40,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 04:46:40,833 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2022-04-06 04:46:40,833 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 19 states have internal predecessors, (54), 10 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2022-04-06 04:46:40,833 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2022-04-06 04:46:40,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-04-06 04:46:40,834 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 04:46:40,834 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 04:46:40,865 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-04-06 04:46:41,047 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 04:46:41,048 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 04:46:41,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 04:46:41,048 INFO L85 PathProgramCache]: Analyzing trace with hash -635325717, now seen corresponding path program 3 times [2022-04-06 04:46:41,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 04:46:41,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714070894] [2022-04-06 04:46:41,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 04:46:41,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 04:46:41,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:41,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 04:46:41,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:41,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 04:46:41,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:41,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 04:46:41,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:41,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 04:46:41,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:41,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 04:46:41,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:41,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-06 04:46:41,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:41,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 04:46:41,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:41,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-04-06 04:46:41,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:41,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-06 04:46:41,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:41,182 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-04-06 04:46:41,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 04:46:41,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714070894] [2022-04-06 04:46:41,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714070894] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 04:46:41,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873231323] [2022-04-06 04:46:41,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 04:46:41,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 04:46:41,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 04:46:41,201 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 04:46:41,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 04:46:41,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-04-06 04:46:41,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 04:46:41,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 04:46:41,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 04:46:41,830 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 53 [2022-04-06 04:46:41,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 04:46:41,835 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 95 [2022-04-06 04:46:42,081 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 76 [2022-04-06 04:46:42,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 04:46:42,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 04:46:42,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 04:46:42,088 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 124 [2022-04-06 04:46:42,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 04:46:42,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 04:46:42,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-04-06 04:46:42,130 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 54 [2022-04-06 04:46:42,243 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 25 proven. 45 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-04-06 04:46:42,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 04:46:44,997 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 41 [2022-04-06 04:46:45,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-04-06 04:46:45,035 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 04:46:45,036 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 88 [2022-04-06 04:46:45,071 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-04-06 04:46:45,072 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2022-04-06 04:46:45,463 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 6 proven. 63 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-04-06 04:46:45,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873231323] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 04:46:45,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 04:46:45,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 17, 21] total 43 [2022-04-06 04:46:45,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724941061] [2022-04-06 04:46:45,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 04:46:45,465 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-06 04:46:45,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 04:46:45,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-06 04:46:45,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1542, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 04:46:45,466 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand has 43 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 38 states have internal predecessors, (88), 21 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2022-04-06 04:46:50,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 04:46:50,916 INFO L93 Difference]: Finished difference Result 192 states and 224 transitions. [2022-04-06 04:46:50,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-06 04:46:50,916 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 38 states have internal predecessors, (88), 21 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) Word has length 77 [2022-04-06 04:46:50,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 04:46:50,920 INFO L225 Difference]: With dead ends: 192 [2022-04-06 04:46:50,920 INFO L226 Difference]: Without dead ends: 192 [2022-04-06 04:46:50,921 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 137 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1956 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=1059, Invalid=6081, Unknown=0, NotChecked=0, Total=7140 [2022-04-06 04:46:50,922 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 371 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 1811 mSolverCounterSat, 448 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 2566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 448 IncrementalHoareTripleChecker+Valid, 1811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 307 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-04-06 04:46:50,922 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 132 Invalid, 2566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [448 Valid, 1811 Invalid, 0 Unknown, 307 Unchecked, 2.2s Time] [2022-04-06 04:46:50,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-04-06 04:46:50,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 127. [2022-04-06 04:46:50,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 93 states have (on average 1.086021505376344) internal successors, (101), 95 states have internal predecessors, (101), 22 states have call successors, (22), 12 states have call predecessors, (22), 11 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-06 04:46:50,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 144 transitions. [2022-04-06 04:46:50,937 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 144 transitions. Word has length 77 [2022-04-06 04:46:50,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 04:46:50,937 INFO L478 AbstractCegarLoop]: Abstraction has 127 states and 144 transitions. [2022-04-06 04:46:50,938 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 38 states have internal predecessors, (88), 21 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2022-04-06 04:46:50,938 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 144 transitions. [2022-04-06 04:46:50,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-04-06 04:46:50,939 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 04:46:50,939 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 04:46:50,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 04:46:51,144 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 04:46:51,145 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 04:46:51,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 04:46:51,145 INFO L85 PathProgramCache]: Analyzing trace with hash 994030920, now seen corresponding path program 4 times [2022-04-06 04:46:51,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 04:46:51,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533118557] [2022-04-06 04:46:51,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 04:46:51,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 04:46:51,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:51,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 04:46:51,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:51,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 04:46:51,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:51,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 04:46:51,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:51,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 04:46:51,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:51,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 04:46:51,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:51,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-06 04:46:51,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:51,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-06 04:46:51,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:51,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-04-06 04:46:51,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:51,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-06 04:46:51,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:51,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-06 04:46:51,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:51,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-04-06 04:46:51,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:51,323 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 8 proven. 66 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-04-06 04:46:51,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 04:46:51,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533118557] [2022-04-06 04:46:51,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533118557] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 04:46:51,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585395541] [2022-04-06 04:46:51,323 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 04:46:51,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 04:46:51,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 04:46:51,340 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 04:46:51,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 04:46:51,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 04:46:51,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 04:46:51,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 04:46:51,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 04:46:52,077 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-04-06 04:46:52,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 04:46:52,298 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 8 proven. 66 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-04-06 04:46:52,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585395541] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 04:46:52,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 04:46:52,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-04-06 04:46:52,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319573828] [2022-04-06 04:46:52,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 04:46:52,299 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 04:46:52,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 04:46:52,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 04:46:52,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2022-04-06 04:46:52,300 INFO L87 Difference]: Start difference. First operand 127 states and 144 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 14 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-04-06 04:46:53,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 04:46:53,522 INFO L93 Difference]: Finished difference Result 159 states and 179 transitions. [2022-04-06 04:46:53,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 04:46:53,523 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 14 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) Word has length 93 [2022-04-06 04:46:53,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 04:46:53,524 INFO L225 Difference]: With dead ends: 159 [2022-04-06 04:46:53,524 INFO L226 Difference]: Without dead ends: 159 [2022-04-06 04:46:53,524 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=299, Invalid=693, Unknown=0, NotChecked=0, Total=992 [2022-04-06 04:46:53,525 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 207 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 04:46:53,525 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 79 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 04:46:53,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-04-06 04:46:53,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 116. [2022-04-06 04:46:53,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 86 states have internal predecessors, (87), 20 states have call successors, (20), 11 states have call predecessors, (20), 10 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 04:46:53,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 126 transitions. [2022-04-06 04:46:53,535 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 126 transitions. Word has length 93 [2022-04-06 04:46:53,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 04:46:53,535 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 126 transitions. [2022-04-06 04:46:53,536 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 14 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-04-06 04:46:53,536 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 126 transitions. [2022-04-06 04:46:53,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-04-06 04:46:53,537 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 04:46:53,537 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 04:46:53,554 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-04-06 04:46:53,747 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 04:46:53,748 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 04:46:53,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 04:46:53,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1349749463, now seen corresponding path program 5 times [2022-04-06 04:46:53,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 04:46:53,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118812755] [2022-04-06 04:46:53,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 04:46:53,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 04:46:53,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:54,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 04:46:54,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:54,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 04:46:54,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:54,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 04:46:54,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:54,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 04:46:54,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:54,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 04:46:54,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:54,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-06 04:46:54,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:54,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-06 04:46:54,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:54,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 04:46:54,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:54,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-06 04:46:54,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:54,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-06 04:46:54,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:54,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 04:46:54,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:54,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-04-06 04:46:54,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:54,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-04-06 04:46:54,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:54,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 04:46:54,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:54,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-04-06 04:46:54,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:54,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-04-06 04:46:54,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:54,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-04-06 04:46:54,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:54,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-04-06 04:46:54,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:46:54,116 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 6 proven. 378 refuted. 0 times theorem prover too weak. 394 trivial. 0 not checked. [2022-04-06 04:46:54,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 04:46:54,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118812755] [2022-04-06 04:46:54,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118812755] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 04:46:54,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706464235] [2022-04-06 04:46:54,116 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 04:46:54,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 04:46:54,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 04:46:54,117 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 04:46:54,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 04:47:35,504 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2022-04-06 04:47:35,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 04:47:35,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 04:47:35,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 04:47:35,837 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-04-06 04:47:35,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 04:47:36,415 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 6 proven. 378 refuted. 0 times theorem prover too weak. 394 trivial. 0 not checked. [2022-04-06 04:47:36,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706464235] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 04:47:36,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 04:47:36,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-04-06 04:47:36,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493611667] [2022-04-06 04:47:36,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 04:47:36,416 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 04:47:36,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 04:47:36,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 04:47:36,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=802, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 04:47:36,417 INFO L87 Difference]: Start difference. First operand 116 states and 126 transitions. Second operand has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 30 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (31), 30 states have call predecessors, (31), 30 states have call successors, (31) [2022-04-06 04:47:54,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 04:47:54,619 INFO L93 Difference]: Finished difference Result 287 states and 339 transitions. [2022-04-06 04:47:54,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 04:47:54,620 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 30 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (31), 30 states have call predecessors, (31), 30 states have call successors, (31) Word has length 149 [2022-04-06 04:47:54,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 04:47:54,621 INFO L225 Difference]: With dead ends: 287 [2022-04-06 04:47:54,621 INFO L226 Difference]: Without dead ends: 287 [2022-04-06 04:47:54,622 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 317 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=1115, Invalid=2917, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 04:47:54,623 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 705 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 2879 mSolverCounterSat, 748 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 705 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 3627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 748 IncrementalHoareTripleChecker+Valid, 2879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-04-06 04:47:54,623 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [705 Valid, 148 Invalid, 3627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [748 Valid, 2879 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-04-06 04:47:54,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-04-06 04:47:54,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 180. [2022-04-06 04:47:54,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 133 states have (on average 1.0150375939849625) internal successors, (135), 134 states have internal predecessors, (135), 36 states have call successors, (36), 11 states have call predecessors, (36), 10 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2022-04-06 04:47:54,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 206 transitions. [2022-04-06 04:47:54,638 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 206 transitions. Word has length 149 [2022-04-06 04:47:54,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 04:47:54,638 INFO L478 AbstractCegarLoop]: Abstraction has 180 states and 206 transitions. [2022-04-06 04:47:54,638 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 30 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (31), 30 states have call predecessors, (31), 30 states have call successors, (31) [2022-04-06 04:47:54,638 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 206 transitions. [2022-04-06 04:47:54,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2022-04-06 04:47:54,641 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 04:47:54,641 INFO L499 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 04:47:54,651 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-04-06 04:47:54,847 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 04:47:54,848 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 04:47:54,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 04:47:54,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1018698857, now seen corresponding path program 6 times [2022-04-06 04:47:54,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 04:47:54,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627135385] [2022-04-06 04:47:54,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 04:47:54,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 04:47:54,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:47:55,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 04:47:55,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:47:55,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-04-06 04:47:55,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:47:55,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 04:47:55,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:47:55,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 04:47:55,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:47:55,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 04:47:55,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:47:55,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-06 04:47:55,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:47:55,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-06 04:47:55,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:47:55,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 04:47:55,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:47:55,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-06 04:47:55,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:47:55,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-06 04:47:55,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:47:55,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 04:47:55,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:47:55,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-04-06 04:47:55,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:47:55,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-04-06 04:47:55,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:47:55,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 04:47:55,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:47:55,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-04-06 04:47:55,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:47:55,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-04-06 04:47:55,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:47:55,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-04-06 04:47:55,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:47:55,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-04-06 04:47:55,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:47:55,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-04-06 04:47:55,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:47:55,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-04-06 04:47:55,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:47:55,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2022-04-06 04:47:55,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:47:55,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2022-04-06 04:47:55,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:47:55,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-04-06 04:47:55,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:47:55,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2022-04-06 04:47:55,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:47:55,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2022-04-06 04:47:55,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:47:55,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2022-04-06 04:47:55,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:47:55,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2022-04-06 04:47:55,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:47:55,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 215 [2022-04-06 04:47:55,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:47:55,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2022-04-06 04:47:55,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:47:55,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 231 [2022-04-06 04:47:55,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:47:55,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 239 [2022-04-06 04:47:55,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:47:55,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 249 [2022-04-06 04:47:55,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:47:55,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2022-04-06 04:47:55,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:47:55,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2022-04-06 04:47:55,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 04:47:55,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3546 backedges. 6 proven. 1770 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2022-04-06 04:47:55,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 04:47:55,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627135385] [2022-04-06 04:47:55,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627135385] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 04:47:55,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244944055] [2022-04-06 04:47:55,638 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 04:47:55,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 04:47:55,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 04:47:55,639 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 04:47:55,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process