/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/array-cav19/array_init_var_plus_ind2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 10:38:18,735 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 10:38:18,737 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 10:38:18,783 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 10:38:18,783 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 10:38:18,784 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 10:38:18,785 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 10:38:18,786 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 10:38:18,799 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 10:38:18,803 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 10:38:18,804 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 10:38:18,804 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 10:38:18,805 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 10:38:18,805 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 10:38:18,806 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 10:38:18,806 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 10:38:18,807 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 10:38:18,807 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 10:38:18,808 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 10:38:18,809 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 10:38:18,810 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 10:38:18,811 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 10:38:18,811 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 10:38:18,812 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 10:38:18,813 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 10:38:18,818 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 10:38:18,818 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 10:38:18,818 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 10:38:18,823 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 10:38:18,834 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 10:38:18,834 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 10:38:18,835 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 10:38:18,835 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 10:38:18,836 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 10:38:18,836 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 10:38:18,836 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 10:38:18,836 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 10:38:18,836 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 10:38:18,836 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 10:38:18,837 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 10:38:18,837 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 10:38:18,837 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 10:38:18,837 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 10:38:18,837 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 10:38:18,837 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 10:38:18,837 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 10:38:18,837 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 10:38:18,837 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 10:38:18,837 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 10:38:18,838 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 10:38:18,838 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 10:38:18,838 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 10:38:19,012 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 10:38:19,039 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 10:38:19,040 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 10:38:19,041 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 10:38:19,042 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 10:38:19,043 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-cav19/array_init_var_plus_ind2.c [2022-01-31 10:38:19,109 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f0455d7d/621d4f4afffd44b6a3adcec08245964e/FLAGfb8651ee5 [2022-01-31 10:38:19,452 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 10:38:19,453 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-cav19/array_init_var_plus_ind2.c [2022-01-31 10:38:19,462 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f0455d7d/621d4f4afffd44b6a3adcec08245964e/FLAGfb8651ee5 [2022-01-31 10:38:19,476 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f0455d7d/621d4f4afffd44b6a3adcec08245964e [2022-01-31 10:38:19,478 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 10:38:19,480 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 10:38:19,483 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 10:38:19,483 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 10:38:19,485 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 10:38:19,486 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 10:38:19" (1/1) ... [2022-01-31 10:38:19,486 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f4b5bcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:38:19, skipping insertion in model container [2022-01-31 10:38:19,487 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 10:38:19" (1/1) ... [2022-01-31 10:38:19,492 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 10:38:19,501 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 10:38:19,632 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-cav19/array_init_var_plus_ind2.c[415,428] [2022-01-31 10:38:19,645 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 10:38:19,650 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 10:38:19,659 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-cav19/array_init_var_plus_ind2.c[415,428] [2022-01-31 10:38:19,665 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 10:38:19,676 INFO L208 MainTranslator]: Completed translation [2022-01-31 10:38:19,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:38:19 WrapperNode [2022-01-31 10:38:19,677 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 10:38:19,677 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 10:38:19,677 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 10:38:19,678 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 10:38:19,685 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:38:19" (1/1) ... [2022-01-31 10:38:19,686 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:38:19" (1/1) ... [2022-01-31 10:38:19,690 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:38:19" (1/1) ... [2022-01-31 10:38:19,691 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:38:19" (1/1) ... [2022-01-31 10:38:19,700 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:38:19" (1/1) ... [2022-01-31 10:38:19,704 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:38:19" (1/1) ... [2022-01-31 10:38:19,708 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:38:19" (1/1) ... [2022-01-31 10:38:19,711 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 10:38:19,712 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 10:38:19,713 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 10:38:19,713 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 10:38:19,713 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:38:19" (1/1) ... [2022-01-31 10:38:19,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 10:38:19,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:38:19,735 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 10:38:19,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 10:38:19,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 10:38:19,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 10:38:19,764 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 10:38:19,764 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 10:38:19,764 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 10:38:19,764 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 10:38:19,764 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 10:38:19,764 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 10:38:19,764 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 10:38:19,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 10:38:19,765 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 10:38:19,765 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 10:38:19,765 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 10:38:19,765 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 10:38:19,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 10:38:19,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 10:38:19,765 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 10:38:19,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 10:38:19,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 10:38:19,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 10:38:19,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 10:38:19,808 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 10:38:19,811 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 10:38:19,923 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 10:38:19,926 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 10:38:19,927 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 10:38:19,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:38:19 BoogieIcfgContainer [2022-01-31 10:38:19,928 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 10:38:19,928 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 10:38:19,928 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 10:38:19,929 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 10:38:19,932 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:38:19" (1/1) ... [2022-01-31 10:38:19,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 10:38:19 BasicIcfg [2022-01-31 10:38:19,960 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 10:38:19,961 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 10:38:19,961 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 10:38:19,963 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 10:38:19,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 10:38:19" (1/4) ... [2022-01-31 10:38:19,963 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@231cbd59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 10:38:19, skipping insertion in model container [2022-01-31 10:38:19,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:38:19" (2/4) ... [2022-01-31 10:38:19,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@231cbd59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 10:38:19, skipping insertion in model container [2022-01-31 10:38:19,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:38:19" (3/4) ... [2022-01-31 10:38:19,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@231cbd59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 10:38:19, skipping insertion in model container [2022-01-31 10:38:19,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 10:38:19" (4/4) ... [2022-01-31 10:38:19,965 INFO L111 eAbstractionObserver]: Analyzing ICFG array_init_var_plus_ind2.cJordan [2022-01-31 10:38:19,968 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 10:38:19,968 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 10:38:19,995 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 10:38:20,000 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 10:38:20,000 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 10:38:20,008 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 10:38:20,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-31 10:38:20,013 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:38:20,014 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:38:20,014 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:38:20,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:38:20,018 INFO L85 PathProgramCache]: Analyzing trace with hash 642585017, now seen corresponding path program 1 times [2022-01-31 10:38:20,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:38:20,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937700824] [2022-01-31 10:38:20,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:38:20,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:38:20,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:38:20,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:38:20,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:38:20,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:38:20,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:38:20,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937700824] [2022-01-31 10:38:20,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937700824] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 10:38:20,219 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 10:38:20,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 10:38:20,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243512402] [2022-01-31 10:38:20,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 10:38:20,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 10:38:20,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:38:20,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 10:38:20,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 10:38:20,249 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:38:20,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:38:20,281 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2022-01-31 10:38:20,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 10:38:20,283 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-01-31 10:38:20,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:38:20,290 INFO L225 Difference]: With dead ends: 25 [2022-01-31 10:38:20,291 INFO L226 Difference]: Without dead ends: 20 [2022-01-31 10:38:20,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 10:38:20,297 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 10:38:20,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 26 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 10:38:20,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-01-31 10:38:20,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-01-31 10:38:20,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 10:38:20,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-01-31 10:38:20,321 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 13 [2022-01-31 10:38:20,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:38:20,322 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-01-31 10:38:20,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:38:20,322 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-01-31 10:38:20,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-31 10:38:20,323 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:38:20,323 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:38:20,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 10:38:20,324 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:38:20,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:38:20,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1530088698, now seen corresponding path program 1 times [2022-01-31 10:38:20,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:38:20,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625763459] [2022-01-31 10:38:20,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:38:20,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:38:20,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:38:20,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:38:20,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:38:20,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:38:20,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:38:20,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625763459] [2022-01-31 10:38:20,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625763459] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 10:38:20,403 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 10:38:20,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 10:38:20,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522202402] [2022-01-31 10:38:20,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 10:38:20,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 10:38:20,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:38:20,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 10:38:20,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 10:38:20,405 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:38:20,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:38:20,486 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2022-01-31 10:38:20,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 10:38:20,487 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-01-31 10:38:20,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:38:20,488 INFO L225 Difference]: With dead ends: 28 [2022-01-31 10:38:20,488 INFO L226 Difference]: Without dead ends: 28 [2022-01-31 10:38:20,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 10:38:20,490 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 44 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:38:20,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 19 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:38:20,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-31 10:38:20,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 21. [2022-01-31 10:38:20,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 10:38:20,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-01-31 10:38:20,495 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 13 [2022-01-31 10:38:20,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:38:20,495 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-01-31 10:38:20,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:38:20,495 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-01-31 10:38:20,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 10:38:20,496 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:38:20,496 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:38:20,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 10:38:20,496 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:38:20,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:38:20,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1622551480, now seen corresponding path program 1 times [2022-01-31 10:38:20,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:38:20,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194229717] [2022-01-31 10:38:20,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:38:20,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:38:20,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:38:20,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:38:20,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:38:20,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:38:20,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:38:20,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194229717] [2022-01-31 10:38:20,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194229717] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 10:38:20,580 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 10:38:20,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 10:38:20,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573688222] [2022-01-31 10:38:20,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 10:38:20,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 10:38:20,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:38:20,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 10:38:20,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 10:38:20,583 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:38:20,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:38:20,648 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2022-01-31 10:38:20,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 10:38:20,649 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-01-31 10:38:20,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:38:20,650 INFO L225 Difference]: With dead ends: 25 [2022-01-31 10:38:20,650 INFO L226 Difference]: Without dead ends: 23 [2022-01-31 10:38:20,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 10:38:20,655 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 21 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 10:38:20,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 28 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 10:38:20,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-01-31 10:38:20,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2022-01-31 10:38:20,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 10:38:20,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-01-31 10:38:20,664 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 14 [2022-01-31 10:38:20,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:38:20,664 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-01-31 10:38:20,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:38:20,664 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-01-31 10:38:20,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-31 10:38:20,665 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:38:20,665 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:38:20,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 10:38:20,666 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:38:20,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:38:20,666 INFO L85 PathProgramCache]: Analyzing trace with hash 2003313729, now seen corresponding path program 1 times [2022-01-31 10:38:20,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:38:20,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989633944] [2022-01-31 10:38:20,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:38:20,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:38:20,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:38:20,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:38:20,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:38:20,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:38:20,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:38:20,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989633944] [2022-01-31 10:38:20,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989633944] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:38:20,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078541805] [2022-01-31 10:38:20,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:38:20,760 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:38:20,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:38:20,762 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:38:20,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 10:38:20,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:38:20,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 10:38:20,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:38:20,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:38:20,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:38:21,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:38:21,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078541805] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:38:21,006 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:38:21,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2022-01-31 10:38:21,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39679519] [2022-01-31 10:38:21,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:38:21,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 10:38:21,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:38:21,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 10:38:21,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-01-31 10:38:21,007 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 10:38:21,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:38:21,140 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2022-01-31 10:38:21,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 10:38:21,141 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 16 [2022-01-31 10:38:21,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:38:21,142 INFO L225 Difference]: With dead ends: 42 [2022-01-31 10:38:21,142 INFO L226 Difference]: Without dead ends: 40 [2022-01-31 10:38:21,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-01-31 10:38:21,143 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 92 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:38:21,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 27 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:38:21,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-31 10:38:21,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 30. [2022-01-31 10:38:21,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 10:38:21,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-01-31 10:38:21,146 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 16 [2022-01-31 10:38:21,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:38:21,146 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-01-31 10:38:21,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 10:38:21,147 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-01-31 10:38:21,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 10:38:21,147 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:38:21,147 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:38:21,166 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-31 10:38:21,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:38:21,363 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:38:21,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:38:21,364 INFO L85 PathProgramCache]: Analyzing trace with hash -980827736, now seen corresponding path program 1 times [2022-01-31 10:38:21,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:38:21,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356583227] [2022-01-31 10:38:21,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:38:21,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:38:21,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:38:21,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:38:21,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:38:21,551 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:38:21,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:38:21,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356583227] [2022-01-31 10:38:21,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356583227] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:38:21,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562399283] [2022-01-31 10:38:21,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:38:21,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:38:21,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:38:21,556 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:38:21,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 10:38:21,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:38:21,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-31 10:38:21,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:38:21,727 INFO L387 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 13 treesize of output 9 [2022-01-31 10:38:21,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-31 10:38:21,855 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:38:21,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:38:21,951 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-01-31 10:38:21,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 36 treesize of output 32 [2022-01-31 10:38:22,070 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:38:22,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562399283] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:38:22,070 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:38:22,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 24 [2022-01-31 10:38:22,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2537810] [2022-01-31 10:38:22,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:38:22,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 10:38:22,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:38:22,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 10:38:22,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2022-01-31 10:38:22,072 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 24 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:38:22,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:38:22,330 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2022-01-31 10:38:22,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 10:38:22,330 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-01-31 10:38:22,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:38:22,331 INFO L225 Difference]: With dead ends: 43 [2022-01-31 10:38:22,331 INFO L226 Difference]: Without dead ends: 43 [2022-01-31 10:38:22,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=915, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 10:38:22,332 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 42 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:38:22,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 66 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 245 Invalid, 0 Unknown, 44 Unchecked, 0.1s Time] [2022-01-31 10:38:22,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-31 10:38:22,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2022-01-31 10:38:22,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 10:38:22,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2022-01-31 10:38:22,335 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 20 [2022-01-31 10:38:22,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:38:22,335 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2022-01-31 10:38:22,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:38:22,336 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2022-01-31 10:38:22,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-31 10:38:22,336 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:38:22,336 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:38:22,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 10:38:22,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:38:22,537 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:38:22,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:38:22,538 INFO L85 PathProgramCache]: Analyzing trace with hash 855145601, now seen corresponding path program 2 times [2022-01-31 10:38:22,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:38:22,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913737746] [2022-01-31 10:38:22,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:38:22,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:38:22,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:38:22,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:38:22,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:38:22,722 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:38:22,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:38:22,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913737746] [2022-01-31 10:38:22,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913737746] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:38:22,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337025268] [2022-01-31 10:38:22,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 10:38:22,725 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:38:22,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:38:22,726 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:38:22,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 10:38:22,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 10:38:22,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:38:22,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-31 10:38:22,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:38:22,863 INFO L387 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 [2022-01-31 10:38:22,922 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-31 10:38:22,923 INFO L387 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 25 treesize of output 24 [2022-01-31 10:38:22,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-31 10:38:23,035 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:38:23,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:38:37,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-01-31 10:38:37,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 210 treesize of output 202 [2022-01-31 10:38:37,383 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:38:37,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337025268] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:38:37,383 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:38:37,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 29 [2022-01-31 10:38:37,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815887513] [2022-01-31 10:38:37,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:38:37,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 10:38:37,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:38:37,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 10:38:37,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=716, Unknown=7, NotChecked=0, Total=812 [2022-01-31 10:38:37,384 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 29 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:38:37,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:38:37,966 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2022-01-31 10:38:37,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 10:38:37,966 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-01-31 10:38:37,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:38:37,969 INFO L225 Difference]: With dead ends: 57 [2022-01-31 10:38:37,969 INFO L226 Difference]: Without dead ends: 57 [2022-01-31 10:38:37,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=252, Invalid=1811, Unknown=7, NotChecked=0, Total=2070 [2022-01-31 10:38:37,973 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 74 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:38:37,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 82 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 447 Invalid, 0 Unknown, 70 Unchecked, 0.2s Time] [2022-01-31 10:38:37,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-01-31 10:38:37,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 38. [2022-01-31 10:38:37,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 31 states have internal predecessors, (35), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 10:38:37,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2022-01-31 10:38:37,979 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 23 [2022-01-31 10:38:37,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:38:37,980 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2022-01-31 10:38:37,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:38:37,980 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2022-01-31 10:38:37,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 10:38:37,980 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:38:37,980 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:38:38,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 10:38:38,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:38:38,198 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:38:38,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:38:38,199 INFO L85 PathProgramCache]: Analyzing trace with hash -636640710, now seen corresponding path program 2 times [2022-01-31 10:38:38,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:38:38,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656396352] [2022-01-31 10:38:38,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:38:38,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:38:38,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:38:38,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:38:38,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:38:38,256 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:38:38,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:38:38,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656396352] [2022-01-31 10:38:38,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656396352] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:38:38,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873408527] [2022-01-31 10:38:38,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 10:38:38,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:38:38,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:38:38,257 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:38:38,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 10:38:38,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 10:38:38,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:38:38,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 10:38:38,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:38:38,400 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:38:38,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:38:38,490 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:38:38,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873408527] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:38:38,490 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:38:38,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2022-01-31 10:38:38,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936735631] [2022-01-31 10:38:38,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:38:38,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 10:38:38,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:38:38,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 10:38:38,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=231, Unknown=0, NotChecked=0, Total=380 [2022-01-31 10:38:38,493 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 20 states, 20 states have (on average 2.6) internal successors, (52), 18 states have internal predecessors, (52), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 10:38:38,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:38:38,752 INFO L93 Difference]: Finished difference Result 96 states and 114 transitions. [2022-01-31 10:38:38,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 10:38:38,753 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 18 states have internal predecessors, (52), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2022-01-31 10:38:38,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:38:38,754 INFO L225 Difference]: With dead ends: 96 [2022-01-31 10:38:38,755 INFO L226 Difference]: Without dead ends: 96 [2022-01-31 10:38:38,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=329, Invalid=601, Unknown=0, NotChecked=0, Total=930 [2022-01-31 10:38:38,755 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 222 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:38:38,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 24 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:38:38,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-01-31 10:38:38,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 55. [2022-01-31 10:38:38,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 48 states have internal predecessors, (57), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 10:38:38,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-01-31 10:38:38,760 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 25 [2022-01-31 10:38:38,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:38:38,761 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-01-31 10:38:38,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 18 states have internal predecessors, (52), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 10:38:38,761 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-01-31 10:38:38,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 10:38:38,761 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:38:38,761 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:38:38,780 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-31 10:38:38,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:38:38,967 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:38:38,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:38:38,968 INFO L85 PathProgramCache]: Analyzing trace with hash -71686392, now seen corresponding path program 3 times [2022-01-31 10:38:38,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:38:38,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699691011] [2022-01-31 10:38:38,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:38:38,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:38:38,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:38:39,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:38:39,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:38:39,132 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:38:39,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:38:39,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699691011] [2022-01-31 10:38:39,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699691011] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:38:39,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675106804] [2022-01-31 10:38:39,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 10:38:39,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:38:39,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:38:39,134 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:38:39,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 10:38:39,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-31 10:38:39,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:38:39,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-31 10:38:39,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:38:39,260 INFO L387 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 [2022-01-31 10:38:39,315 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-31 10:38:39,316 INFO L387 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 25 treesize of output 24 [2022-01-31 10:38:39,376 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-31 10:38:39,376 INFO L387 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 25 treesize of output 24 [2022-01-31 10:38:39,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-31 10:38:39,490 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:38:39,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:39:17,142 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_38 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_38)) (forall ((v_ArrVal_92 Int) (v_main_~i~0_37 Int) (v_ArrVal_94 Int)) (or (not (<= (+ v_main_~i~0_38 1) v_main_~i~0_37)) (<= c_main_~k~0 (+ v_main_~i~0_38 v_main_~i~0_37 (select (store (store (select |c_#memory_int| |c_main_~#a~0.base|) (+ (* v_main_~i~0_38 4) |c_main_~#a~0.offset|) v_ArrVal_92) (+ (* v_main_~i~0_37 4) |c_main_~#a~0.offset|) v_ArrVal_94) (+ 4 |c_main_~#a~0.offset|)))))))) is different from false [2022-01-31 10:39:17,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2022-01-31 10:39:17,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 450 treesize of output 442 [2022-01-31 10:39:17,568 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2022-01-31 10:39:17,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675106804] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:39:17,568 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:39:17,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 35 [2022-01-31 10:39:17,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447120087] [2022-01-31 10:39:17,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:39:17,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 10:39:17,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:39:17,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 10:39:17,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=979, Unknown=24, NotChecked=64, Total=1190 [2022-01-31 10:39:17,570 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 35 states, 32 states have (on average 1.84375) internal successors, (59), 32 states have internal predecessors, (59), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:39:19,629 WARN L838 $PredicateComparison]: unable to prove that (and (= c_~N~0 |c_old(~N~0)|) (= |c_#NULL.base| |c_old(#NULL.base)|) (= 0 (+ (- 1) c_main_~i~0)) (<= 0 c_main_~j~0) (<= (+ c_main_~i~0 c_main_~k~0) 0) (forall ((v_main_~i~0_38 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_38)) (forall ((v_ArrVal_92 Int) (v_main_~i~0_37 Int) (v_ArrVal_94 Int)) (or (not (<= (+ v_main_~i~0_38 1) v_main_~i~0_37)) (<= c_main_~k~0 (+ v_main_~i~0_38 v_main_~i~0_37 (select (store (store (select |c_#memory_int| |c_main_~#a~0.base|) (+ (* v_main_~i~0_38 4) |c_main_~#a~0.offset|) v_ArrVal_92) (+ (* v_main_~i~0_37 4) |c_main_~#a~0.offset|) v_ArrVal_94) (+ 4 |c_main_~#a~0.offset|)))))))) (<= c_main_~k~0 0) (<= 0 (select (select |c_#memory_int| |c_main_~#a~0.base|) (+ (* c_main_~i~0 4) |c_main_~#a~0.offset|))) (= |c_#NULL.offset| |c_old(#NULL.offset)|)) is different from false [2022-01-31 10:39:20,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:39:20,224 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2022-01-31 10:39:20,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 10:39:20,224 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 1.84375) internal successors, (59), 32 states have internal predecessors, (59), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-01-31 10:39:20,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:39:20,225 INFO L225 Difference]: With dead ends: 72 [2022-01-31 10:39:20,225 INFO L226 Difference]: Without dead ends: 72 [2022-01-31 10:39:20,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 40.2s TimeCoverageRelationStatistics Valid=412, Invalid=2651, Unknown=25, NotChecked=218, Total=3306 [2022-01-31 10:39:20,227 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 70 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:39:20,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 93 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 502 Invalid, 0 Unknown, 98 Unchecked, 0.2s Time] [2022-01-31 10:39:20,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-01-31 10:39:20,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 54. [2022-01-31 10:39:20,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 47 states have internal predecessors, (56), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 10:39:20,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2022-01-31 10:39:20,231 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 26 [2022-01-31 10:39:20,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:39:20,233 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2022-01-31 10:39:20,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 1.84375) internal successors, (59), 32 states have internal predecessors, (59), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 10:39:20,233 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2022-01-31 10:39:20,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 10:39:20,236 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:39:20,236 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:39:20,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 10:39:20,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:39:20,447 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:39:20,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:39:20,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1080447843, now seen corresponding path program 1 times [2022-01-31 10:39:20,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:39:20,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057391833] [2022-01-31 10:39:20,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:39:20,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:39:20,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:39:20,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:39:20,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:39:20,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-01-31 10:39:20,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:39:20,511 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:39:20,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:39:20,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057391833] [2022-01-31 10:39:20,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057391833] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:39:20,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516395545] [2022-01-31 10:39:20,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:39:20,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:39:20,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:39:20,513 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:39:20,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 10:39:20,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:39:20,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 10:39:20,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:39:20,621 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:39:20,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:39:20,676 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:39:20,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516395545] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:39:20,676 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:39:20,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-01-31 10:39:20,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901519592] [2022-01-31 10:39:20,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:39:20,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 10:39:20,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:39:20,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 10:39:20,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-01-31 10:39:20,677 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 10:39:20,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:39:20,775 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2022-01-31 10:39:20,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 10:39:20,776 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 28 [2022-01-31 10:39:20,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:39:20,776 INFO L225 Difference]: With dead ends: 60 [2022-01-31 10:39:20,776 INFO L226 Difference]: Without dead ends: 54 [2022-01-31 10:39:20,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-01-31 10:39:20,777 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 31 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:39:20,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 41 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:39:20,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-01-31 10:39:20,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-01-31 10:39:20,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 47 states have internal predecessors, (55), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 10:39:20,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2022-01-31 10:39:20,780 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 28 [2022-01-31 10:39:20,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:39:20,780 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2022-01-31 10:39:20,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 10:39:20,781 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2022-01-31 10:39:20,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 10:39:20,781 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:39:20,781 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:39:20,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-31 10:39:20,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:39:20,991 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:39:20,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:39:20,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1169194614, now seen corresponding path program 2 times [2022-01-31 10:39:20,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:39:20,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909214926] [2022-01-31 10:39:20,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:39:20,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:39:21,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:39:21,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:39:21,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:39:21,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-01-31 10:39:21,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:39:21,219 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:39:21,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:39:21,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909214926] [2022-01-31 10:39:21,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909214926] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:39:21,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914478294] [2022-01-31 10:39:21,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 10:39:21,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:39:21,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:39:21,221 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:39:21,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 10:39:21,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 10:39:21,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:39:21,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-31 10:39:21,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:39:21,397 INFO L387 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 [2022-01-31 10:39:22,382 INFO L353 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-01-31 10:39:22,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 10 [2022-01-31 10:39:22,452 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:39:22,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:39:22,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914478294] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:39:22,568 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:39:22,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2022-01-31 10:39:22,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195856318] [2022-01-31 10:39:22,568 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:39:22,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 10:39:22,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:39:22,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 10:39:22,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=786, Unknown=2, NotChecked=0, Total=870 [2022-01-31 10:39:22,569 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 27 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 10:39:23,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:39:23,164 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2022-01-31 10:39:23,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 10:39:23,165 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 31 [2022-01-31 10:39:23,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:39:23,165 INFO L225 Difference]: With dead ends: 73 [2022-01-31 10:39:23,165 INFO L226 Difference]: Without dead ends: 54 [2022-01-31 10:39:23,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=245, Invalid=2009, Unknown=2, NotChecked=0, Total=2256 [2022-01-31 10:39:23,166 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 44 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:39:23,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 105 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 401 Invalid, 0 Unknown, 97 Unchecked, 0.2s Time] [2022-01-31 10:39:23,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-01-31 10:39:23,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-01-31 10:39:23,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.173913043478261) internal successors, (54), 47 states have internal predecessors, (54), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 10:39:23,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2022-01-31 10:39:23,170 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 31 [2022-01-31 10:39:23,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:39:23,170 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2022-01-31 10:39:23,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 10:39:23,171 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2022-01-31 10:39:23,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 10:39:23,171 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:39:23,171 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:39:23,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-31 10:39:23,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:39:23,372 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:39:23,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:39:23,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1597944317, now seen corresponding path program 3 times [2022-01-31 10:39:23,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:39:23,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208904669] [2022-01-31 10:39:23,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:39:23,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:39:23,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:39:23,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:39:23,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:39:23,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-01-31 10:39:23,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:39:23,550 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:39:23,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:39:23,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208904669] [2022-01-31 10:39:23,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208904669] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:39:23,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918346007] [2022-01-31 10:39:23,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 10:39:23,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:39:23,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:39:23,552 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:39:23,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-31 10:39:23,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-31 10:39:23,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:39:23,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-31 10:39:23,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:39:23,753 INFO L387 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 [2022-01-31 10:39:23,813 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-31 10:39:23,814 INFO L387 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 25 treesize of output 24 [2022-01-31 10:39:25,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-31 10:39:26,050 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:39:26,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:39:51,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-01-31 10:39:51,083 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 210 treesize of output 202 [2022-01-31 10:39:51,322 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:39:51,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918346007] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:39:51,322 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:39:51,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 39 [2022-01-31 10:39:51,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858125809] [2022-01-31 10:39:51,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:39:51,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 10:39:51,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:39:51,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 10:39:51,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1334, Unknown=13, NotChecked=0, Total=1482 [2022-01-31 10:39:51,324 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 39 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 states have internal predecessors, (74), 7 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 10:39:51,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:39:51,930 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2022-01-31 10:39:51,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 10:39:51,930 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 states have internal predecessors, (74), 7 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 34 [2022-01-31 10:39:51,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:39:51,931 INFO L225 Difference]: With dead ends: 75 [2022-01-31 10:39:51,931 INFO L226 Difference]: Without dead ends: 75 [2022-01-31 10:39:51,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 27.7s TimeCoverageRelationStatistics Valid=309, Invalid=2758, Unknown=13, NotChecked=0, Total=3080 [2022-01-31 10:39:51,932 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 71 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 10:39:51,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 142 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 744 Invalid, 0 Unknown, 144 Unchecked, 0.3s Time] [2022-01-31 10:39:51,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-01-31 10:39:51,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 63. [2022-01-31 10:39:51,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 53 states have (on average 1.150943396226415) internal successors, (61), 54 states have internal predecessors, (61), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 10:39:51,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2022-01-31 10:39:51,935 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 34 [2022-01-31 10:39:51,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:39:51,936 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2022-01-31 10:39:51,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 36 states have internal predecessors, (74), 7 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 10:39:51,936 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2022-01-31 10:39:51,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-31 10:39:51,936 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:39:51,936 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:39:51,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-31 10:39:52,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-31 10:39:52,140 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:39:52,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:39:52,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1247608086, now seen corresponding path program 4 times [2022-01-31 10:39:52,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:39:52,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996945457] [2022-01-31 10:39:52,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:39:52,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:39:52,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:39:52,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:39:52,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:39:52,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 10:39:52,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:39:52,395 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:39:52,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:39:52,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996945457] [2022-01-31 10:39:52,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996945457] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:39:52,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029151929] [2022-01-31 10:39:52,395 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 10:39:52,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:39:52,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:39:52,396 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:39:52,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-31 10:39:52,438 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 10:39:52,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:39:52,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-31 10:39:52,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:39:52,572 INFO L387 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 [2022-01-31 10:39:52,638 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-31 10:39:52,638 INFO L387 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 25 treesize of output 24 [2022-01-31 10:39:52,700 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-31 10:39:52,701 INFO L387 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 25 treesize of output 24 [2022-01-31 10:39:54,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-31 10:39:54,934 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:39:54,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:40:35,933 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_63 Int)) (or (forall ((v_ArrVal_178 Int) (v_ArrVal_175 Int) (v_main_~i~0_62 Int)) (or (<= c_main_~k~0 (+ v_main_~i~0_63 v_main_~i~0_62 (select (store (store (select |c_#memory_int| |c_main_~#a~0.base|) (+ |c_main_~#a~0.offset| (* v_main_~i~0_63 4)) v_ArrVal_175) (+ |c_main_~#a~0.offset| (* v_main_~i~0_62 4)) v_ArrVal_178) (+ 8 |c_main_~#a~0.offset|)))) (not (<= (+ v_main_~i~0_63 1) v_main_~i~0_62)))) (not (<= (+ c_main_~i~0 1) v_main_~i~0_63)))) is different from false [2022-01-31 10:40:35,944 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2022-01-31 10:40:35,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 450 treesize of output 442 [2022-01-31 10:40:36,375 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2022-01-31 10:40:36,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029151929] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:40:36,375 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:40:36,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 16] total 45 [2022-01-31 10:40:36,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996611937] [2022-01-31 10:40:36,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:40:36,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 10:40:36,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:40:36,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 10:40:36,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1694, Unknown=32, NotChecked=84, Total=1980 [2022-01-31 10:40:36,378 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 45 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 42 states have internal predecessors, (83), 7 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 10:40:38,535 WARN L838 $PredicateComparison]: unable to prove that (and (= c_~N~0 |c_old(~N~0)|) (= |c_#NULL.base| |c_old(#NULL.base)|) (<= 1 (select (select |c_#memory_int| |c_main_~#a~0.base|) (+ (* c_main_~i~0 4) |c_main_~#a~0.offset|))) (= c_main_~i~0 2) (<= 1 c_main_~j~0) (forall ((v_main_~i~0_63 Int)) (or (forall ((v_ArrVal_178 Int) (v_ArrVal_175 Int) (v_main_~i~0_62 Int)) (or (<= c_main_~k~0 (+ v_main_~i~0_63 v_main_~i~0_62 (select (store (store (select |c_#memory_int| |c_main_~#a~0.base|) (+ |c_main_~#a~0.offset| (* v_main_~i~0_63 4)) v_ArrVal_175) (+ |c_main_~#a~0.offset| (* v_main_~i~0_62 4)) v_ArrVal_178) (+ 8 |c_main_~#a~0.offset|)))) (not (<= (+ v_main_~i~0_63 1) v_main_~i~0_62)))) (not (<= (+ c_main_~i~0 1) v_main_~i~0_63)))) (<= (+ c_main_~k~0 1) 0) (<= (+ c_main_~i~0 c_main_~k~0 1) 0) (= |c_#NULL.offset| |c_old(#NULL.offset)|)) is different from false [2022-01-31 10:40:39,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:40:39,793 INFO L93 Difference]: Finished difference Result 85 states and 93 transitions. [2022-01-31 10:40:39,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 10:40:39,793 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 42 states have internal predecessors, (83), 7 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 37 [2022-01-31 10:40:39,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:40:39,794 INFO L225 Difference]: With dead ends: 85 [2022-01-31 10:40:39,794 INFO L226 Difference]: Without dead ends: 85 [2022-01-31 10:40:39,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1167 ImplicationChecksByTransitivity, 46.4s TimeCoverageRelationStatistics Valid=474, Invalid=3922, Unknown=34, NotChecked=262, Total=4692 [2022-01-31 10:40:39,795 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 81 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 1331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 193 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 10:40:39,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 171 Invalid, 1331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1075 Invalid, 0 Unknown, 193 Unchecked, 0.4s Time] [2022-01-31 10:40:39,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-01-31 10:40:39,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2022-01-31 10:40:39,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 53 states have internal predecessors, (60), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 10:40:39,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2022-01-31 10:40:39,798 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 37 [2022-01-31 10:40:39,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:40:39,799 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2022-01-31 10:40:39,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 42 states have internal predecessors, (83), 7 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 10:40:39,799 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2022-01-31 10:40:39,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 10:40:39,799 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:40:39,799 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:40:39,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-31 10:40:40,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:40:40,008 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:40:40,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:40:40,008 INFO L85 PathProgramCache]: Analyzing trace with hash -937986062, now seen corresponding path program 5 times [2022-01-31 10:40:40,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:40:40,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195288071] [2022-01-31 10:40:40,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:40:40,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:40:40,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:40:40,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:40:40,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:40:40,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-01-31 10:40:40,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:40:40,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-01-31 10:40:40,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:40:40,305 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:40:40,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:40:40,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195288071] [2022-01-31 10:40:40,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195288071] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:40:40,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779786236] [2022-01-31 10:40:40,306 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 10:40:40,306 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:40:40,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:40:40,307 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:40:40,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-31 10:40:40,357 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-31 10:40:40,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:40:40,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-31 10:40:40,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:40:40,549 INFO L387 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 13 treesize of output 9 [2022-01-31 10:40:40,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-31 10:40:40,906 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:40:40,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:40:43,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-01-31 10:40:43,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 36 treesize of output 32 [2022-01-31 10:40:43,357 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:40:43,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779786236] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:40:43,358 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:40:43,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 15] total 43 [2022-01-31 10:40:43,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686627617] [2022-01-31 10:40:43,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:40:43,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 10:40:43,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:40:43,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 10:40:43,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1662, Unknown=1, NotChecked=0, Total=1806 [2022-01-31 10:40:43,359 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand has 43 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 10 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 10:40:44,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:40:44,066 INFO L93 Difference]: Finished difference Result 91 states and 99 transitions. [2022-01-31 10:40:44,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 10:40:44,066 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 10 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 42 [2022-01-31 10:40:44,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:40:44,067 INFO L225 Difference]: With dead ends: 91 [2022-01-31 10:40:44,067 INFO L226 Difference]: Without dead ends: 91 [2022-01-31 10:40:44,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 65 SyntacticMatches, 6 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=301, Invalid=3238, Unknown=1, NotChecked=0, Total=3540 [2022-01-31 10:40:44,069 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 84 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 218 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:40:44,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 149 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 497 Invalid, 0 Unknown, 218 Unchecked, 0.2s Time] [2022-01-31 10:40:44,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-01-31 10:40:44,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 71. [2022-01-31 10:40:44,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 60 states have internal predecessors, (67), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 10:40:44,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2022-01-31 10:40:44,072 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 42 [2022-01-31 10:40:44,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:40:44,072 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2022-01-31 10:40:44,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 10 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 10:40:44,072 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2022-01-31 10:40:44,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-31 10:40:44,073 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:40:44,073 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:40:44,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-31 10:40:44,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-31 10:40:44,282 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:40:44,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:40:44,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1013553675, now seen corresponding path program 6 times [2022-01-31 10:40:44,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:40:44,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007517146] [2022-01-31 10:40:44,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:40:44,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:40:44,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:40:44,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:40:44,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:40:44,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 10:40:44,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:40:44,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-31 10:40:44,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:40:44,602 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:40:44,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:40:44,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007517146] [2022-01-31 10:40:44,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007517146] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:40:44,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462334468] [2022-01-31 10:40:44,602 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 10:40:44,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:40:44,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:40:44,604 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:40:44,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-31 10:40:44,655 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-31 10:40:44,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:40:44,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-31 10:40:44,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:40:44,845 INFO L387 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 [2022-01-31 10:40:44,912 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-31 10:40:44,912 INFO L387 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 25 treesize of output 24 [2022-01-31 10:40:45,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-31 10:40:45,288 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:40:45,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:41:03,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-01-31 10:41:03,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 94 treesize of output 90 [2022-01-31 10:41:04,331 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:41:04,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462334468] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:41:04,331 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:41:04,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 17] total 47 [2022-01-31 10:41:04,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158557117] [2022-01-31 10:41:04,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:41:04,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 10:41:04,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:41:04,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 10:41:04,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1995, Unknown=10, NotChecked=0, Total=2162 [2022-01-31 10:41:04,333 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand has 47 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 44 states have internal predecessors, (92), 9 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 10:41:17,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:41:17,013 INFO L93 Difference]: Finished difference Result 116 states and 126 transitions. [2022-01-31 10:41:17,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 10:41:17,013 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 44 states have internal predecessors, (92), 9 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 45 [2022-01-31 10:41:17,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:41:17,014 INFO L225 Difference]: With dead ends: 116 [2022-01-31 10:41:17,014 INFO L226 Difference]: Without dead ends: 116 [2022-01-31 10:41:17,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 67 SyntacticMatches, 6 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1290 ImplicationChecksByTransitivity, 31.5s TimeCoverageRelationStatistics Valid=443, Invalid=5392, Unknown=17, NotChecked=0, Total=5852 [2022-01-31 10:41:17,016 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 89 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 1135 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 1596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 409 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 10:41:17,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 200 Invalid, 1596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1135 Invalid, 0 Unknown, 409 Unchecked, 0.5s Time] [2022-01-31 10:41:17,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-01-31 10:41:17,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 71. [2022-01-31 10:41:17,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 60 states have internal predecessors, (67), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 10:41:17,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2022-01-31 10:41:17,028 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 45 [2022-01-31 10:41:17,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:41:17,028 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2022-01-31 10:41:17,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 44 states have internal predecessors, (92), 9 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 10:41:17,028 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2022-01-31 10:41:17,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 10:41:17,030 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:41:17,031 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:41:17,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-31 10:41:17,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-31 10:41:17,233 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:41:17,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:41:17,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1638427310, now seen corresponding path program 7 times [2022-01-31 10:41:17,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:41:17,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309865755] [2022-01-31 10:41:17,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:41:17,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:41:17,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:41:17,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:41:17,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:41:17,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-01-31 10:41:17,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:41:17,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 10:41:17,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:41:17,597 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 4 proven. 65 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:41:17,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:41:17,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309865755] [2022-01-31 10:41:17,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309865755] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:41:17,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356942140] [2022-01-31 10:41:17,597 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 10:41:17,598 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:41:17,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:41:17,599 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:41:17,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-31 10:41:17,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:41:17,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-31 10:41:17,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:41:17,836 INFO L387 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 [2022-01-31 10:41:17,910 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-31 10:41:17,911 INFO L387 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 25 treesize of output 24 [2022-01-31 10:41:17,985 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-31 10:41:17,985 INFO L387 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 25 treesize of output 24 [2022-01-31 10:41:22,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-31 10:41:22,407 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 2 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:41:22,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:41:55,700 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_92 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_92)) (forall ((v_main_~i~0_91 Int) (v_ArrVal_261 Int) (v_ArrVal_259 Int)) (or (not (<= (+ v_main_~i~0_92 1) v_main_~i~0_91)) (<= c_main_~k~0 (+ v_main_~i~0_92 v_main_~i~0_91 (select (store (store (select |c_#memory_int| |c_main_~#a~0.base|) (+ (* v_main_~i~0_92 4) |c_main_~#a~0.offset|) v_ArrVal_259) (+ (* v_main_~i~0_91 4) |c_main_~#a~0.offset|) v_ArrVal_261) (+ 12 |c_main_~#a~0.offset|)))))))) is different from false [2022-01-31 10:41:55,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2022-01-31 10:41:55,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 450 treesize of output 442 [2022-01-31 10:41:56,220 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 4 proven. 60 refuted. 0 times theorem prover too weak. 4 trivial. 5 not checked. [2022-01-31 10:41:56,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356942140] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:41:56,220 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:41:56,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 19] total 53 [2022-01-31 10:41:56,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142403597] [2022-01-31 10:41:56,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:41:56,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 10:41:56,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:41:56,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 10:41:56,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=2449, Unknown=22, NotChecked=100, Total=2756 [2022-01-31 10:41:56,222 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand has 53 states, 51 states have (on average 1.9803921568627452) internal successors, (101), 50 states have internal predecessors, (101), 9 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 10:41:58,530 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 15 c_main_~k~0)) (.cse1 (select (select |c_#memory_int| |c_main_~#a~0.base|) (+ (* c_main_~i~0 4) |c_main_~#a~0.offset|)))) (and (= c_~N~0 |c_old(~N~0)|) (= |c_#NULL.base| |c_old(#NULL.base)|) (<= .cse0 (+ .cse1 (* c_main_~i~0 2))) (<= c_main_~i~0 3) (<= .cse0 (+ c_main_~j~0 (* c_main_~i~0 3))) (= c_main_~i~0 3) (<= 3 .cse1) (<= (+ c_main_~i~0 3 c_main_~k~0) 0) (<= 3 c_main_~j~0) (= |c_main_~#a~0.offset| 0) (<= (+ 3 c_main_~k~0) 0) (<= 3 c_main_~i~0) (forall ((v_main_~i~0_92 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_92)) (forall ((v_main_~i~0_91 Int) (v_ArrVal_261 Int) (v_ArrVal_259 Int)) (or (not (<= (+ v_main_~i~0_92 1) v_main_~i~0_91)) (<= c_main_~k~0 (+ v_main_~i~0_92 v_main_~i~0_91 (select (store (store (select |c_#memory_int| |c_main_~#a~0.base|) (+ (* v_main_~i~0_92 4) |c_main_~#a~0.offset|) v_ArrVal_259) (+ (* v_main_~i~0_91 4) |c_main_~#a~0.offset|) v_ArrVal_261) (+ 12 |c_main_~#a~0.offset|)))))))) (= |c_#NULL.offset| |c_old(#NULL.offset)|))) is different from false [2022-01-31 10:42:08,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:42:08,260 INFO L93 Difference]: Finished difference Result 118 states and 130 transitions. [2022-01-31 10:42:08,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 10:42:08,261 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 51 states have (on average 1.9803921568627452) internal successors, (101), 50 states have internal predecessors, (101), 9 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 48 [2022-01-31 10:42:08,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:42:08,261 INFO L225 Difference]: With dead ends: 118 [2022-01-31 10:42:08,261 INFO L226 Difference]: Without dead ends: 118 [2022-01-31 10:42:08,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 65 SyntacticMatches, 6 SemanticMatches, 88 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1686 ImplicationChecksByTransitivity, 49.3s TimeCoverageRelationStatistics Valid=652, Invalid=6985, Unknown=27, NotChecked=346, Total=8010 [2022-01-31 10:42:08,263 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 137 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 1957 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 2345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 283 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 10:42:08,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 224 Invalid, 2345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1957 Invalid, 0 Unknown, 283 Unchecked, 0.8s Time] [2022-01-31 10:42:08,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-01-31 10:42:08,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 70. [2022-01-31 10:42:08,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 59 states have internal predecessors, (66), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 10:42:08,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2022-01-31 10:42:08,267 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 48 [2022-01-31 10:42:08,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:42:08,267 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2022-01-31 10:42:08,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 51 states have (on average 1.9803921568627452) internal successors, (101), 50 states have internal predecessors, (101), 9 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 10:42:08,267 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2022-01-31 10:42:08,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 10:42:08,268 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:42:08,268 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:42:08,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-31 10:42:08,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-31 10:42:08,475 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:42:08,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:42:08,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1742305511, now seen corresponding path program 8 times [2022-01-31 10:42:08,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:42:08,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158135961] [2022-01-31 10:42:08,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:42:08,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:42:08,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:42:08,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:42:08,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:42:08,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-01-31 10:42:08,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:42:08,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-01-31 10:42:08,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:42:08,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 10:42:08,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:42:08,555 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 15 proven. 35 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 10:42:08,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:42:08,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158135961] [2022-01-31 10:42:08,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158135961] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:42:08,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116142933] [2022-01-31 10:42:08,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 10:42:08,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:42:08,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:42:08,557 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:42:08,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-31 10:42:08,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 10:42:08,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:42:08,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-31 10:42:08,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:42:08,741 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 10:42:08,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:42:08,816 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 10:42:08,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116142933] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:42:08,817 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:42:08,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 18 [2022-01-31 10:42:08,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651930969] [2022-01-31 10:42:08,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:42:08,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 10:42:08,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:42:08,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 10:42:08,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-01-31 10:42:08,818 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 10:42:08,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:42:08,988 INFO L93 Difference]: Finished difference Result 84 states and 93 transitions. [2022-01-31 10:42:08,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 10:42:08,989 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 50 [2022-01-31 10:42:08,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:42:08,989 INFO L225 Difference]: With dead ends: 84 [2022-01-31 10:42:08,989 INFO L226 Difference]: Without dead ends: 70 [2022-01-31 10:42:08,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2022-01-31 10:42:08,990 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 40 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:42:08,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 40 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:42:08,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-01-31 10:42:08,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-01-31 10:42:08,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 58 states have (on average 1.1206896551724137) internal successors, (65), 59 states have internal predecessors, (65), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 10:42:08,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2022-01-31 10:42:08,992 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 50 [2022-01-31 10:42:08,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:42:08,992 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2022-01-31 10:42:08,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 10:42:08,993 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2022-01-31 10:42:08,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-31 10:42:08,993 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:42:08,993 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:42:09,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-31 10:42:09,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-31 10:42:09,203 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:42:09,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:42:09,204 INFO L85 PathProgramCache]: Analyzing trace with hash -73895424, now seen corresponding path program 9 times [2022-01-31 10:42:09,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:42:09,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876262001] [2022-01-31 10:42:09,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:42:09,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:42:09,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:42:09,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:42:09,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:42:09,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 10:42:09,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:42:09,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-31 10:42:09,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:42:09,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-31 10:42:09,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:42:09,514 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 10 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 10:42:09,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:42:09,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876262001] [2022-01-31 10:42:09,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876262001] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:42:09,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328650303] [2022-01-31 10:42:09,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 10:42:09,514 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:42:09,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:42:09,515 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:42:09,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-31 10:42:09,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-31 10:42:09,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:42:09,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-31 10:42:09,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:42:09,831 INFO L387 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 [2022-01-31 10:42:20,808 INFO L353 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-01-31 10:42:20,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 10 [2022-01-31 10:42:20,883 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 15 proven. 49 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 10:42:20,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:42:23,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328650303] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:42:23,009 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:42:23,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 39 [2022-01-31 10:42:23,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863548231] [2022-01-31 10:42:23,009 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:42:23,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 10:42:23,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:42:23,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 10:42:23,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1562, Unknown=3, NotChecked=0, Total=1722 [2022-01-31 10:42:23,010 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand has 39 states, 37 states have (on average 1.945945945945946) internal successors, (72), 36 states have internal predecessors, (72), 9 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 10:42:23,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:42:23,641 INFO L93 Difference]: Finished difference Result 101 states and 107 transitions. [2022-01-31 10:42:23,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 10:42:23,641 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 1.945945945945946) internal successors, (72), 36 states have internal predecessors, (72), 9 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 53 [2022-01-31 10:42:23,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:42:23,642 INFO L225 Difference]: With dead ends: 101 [2022-01-31 10:42:23,642 INFO L226 Difference]: Without dead ends: 70 [2022-01-31 10:42:23,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 44 SyntacticMatches, 7 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=358, Invalid=3421, Unknown=3, NotChecked=0, Total=3782 [2022-01-31 10:42:23,643 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 47 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 10:42:23,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 137 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 633 Invalid, 0 Unknown, 77 Unchecked, 0.3s Time] [2022-01-31 10:42:23,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-01-31 10:42:23,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-01-31 10:42:23,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 58 states have (on average 1.103448275862069) internal successors, (64), 59 states have internal predecessors, (64), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 10:42:23,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 75 transitions. [2022-01-31 10:42:23,645 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 75 transitions. Word has length 53 [2022-01-31 10:42:23,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:42:23,645 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 75 transitions. [2022-01-31 10:42:23,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 1.945945945945946) internal successors, (72), 36 states have internal predecessors, (72), 9 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 10:42:23,646 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 75 transitions. [2022-01-31 10:42:23,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 10:42:23,646 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:42:23,646 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:42:23,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-31 10:42:23,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:42:23,860 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:42:23,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:42:23,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1482044999, now seen corresponding path program 10 times [2022-01-31 10:42:23,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:42:23,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010648060] [2022-01-31 10:42:23,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:42:23,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:42:23,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:42:24,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:42:24,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:42:24,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-01-31 10:42:24,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:42:24,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 10:42:24,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:42:24,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 10:42:24,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:42:24,124 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 75 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 10:42:24,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:42:24,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010648060] [2022-01-31 10:42:24,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010648060] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:42:24,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992607159] [2022-01-31 10:42:24,124 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 10:42:24,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:42:24,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:42:24,125 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:42:24,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-31 10:42:24,178 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 10:42:24,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:42:24,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 40 conjunts are in the unsatisfiable core [2022-01-31 10:42:24,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:42:24,428 INFO L387 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 [2022-01-31 10:42:24,494 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-31 10:42:24,494 INFO L387 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 25 treesize of output 24 [2022-01-31 10:42:38,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-31 10:42:38,997 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 10:42:38,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:43:07,313 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-01-31 10:43:07,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 94 treesize of output 90 [2022-01-31 10:43:07,730 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 75 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 10:43:07,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992607159] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:43:07,731 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:43:07,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 20] total 57 [2022-01-31 10:43:07,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661143049] [2022-01-31 10:43:07,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:43:07,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 10:43:07,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:43:07,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 10:43:07,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=2963, Unknown=16, NotChecked=0, Total=3192 [2022-01-31 10:43:07,733 INFO L87 Difference]: Start difference. First operand 70 states and 75 transitions. Second operand has 57 states, 54 states have (on average 2.037037037037037) internal successors, (110), 54 states have internal predecessors, (110), 13 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 10:43:08,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:43:08,559 INFO L93 Difference]: Finished difference Result 107 states and 113 transitions. [2022-01-31 10:43:08,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 10:43:08,559 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 54 states have (on average 2.037037037037037) internal successors, (110), 54 states have internal predecessors, (110), 13 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 56 [2022-01-31 10:43:08,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:43:08,560 INFO L225 Difference]: With dead ends: 107 [2022-01-31 10:43:08,560 INFO L226 Difference]: Without dead ends: 107 [2022-01-31 10:43:08,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 79 SyntacticMatches, 8 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1622 ImplicationChecksByTransitivity, 43.7s TimeCoverageRelationStatistics Valid=394, Invalid=5442, Unknown=16, NotChecked=0, Total=5852 [2022-01-31 10:43:08,561 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 63 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 1122 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 1299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 10:43:08,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 210 Invalid, 1299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1122 Invalid, 0 Unknown, 131 Unchecked, 0.4s Time] [2022-01-31 10:43:08,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-01-31 10:43:08,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 79. [2022-01-31 10:43:08,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 66 states have internal predecessors, (71), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 10:43:08,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2022-01-31 10:43:08,564 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 56 [2022-01-31 10:43:08,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:43:08,564 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2022-01-31 10:43:08,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 54 states have (on average 2.037037037037037) internal successors, (110), 54 states have internal predecessors, (110), 13 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 10:43:08,564 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2022-01-31 10:43:08,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 10:43:08,565 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:43:08,565 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:43:08,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-31 10:43:08,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-31 10:43:08,771 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:43:08,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:43:08,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1078839136, now seen corresponding path program 11 times [2022-01-31 10:43:08,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:43:08,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616329051] [2022-01-31 10:43:08,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:43:08,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:43:08,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:43:09,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:43:09,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:43:09,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-31 10:43:09,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:43:09,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 10:43:09,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:43:09,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-31 10:43:09,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:43:09,107 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 6 proven. 95 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 10:43:09,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:43:09,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616329051] [2022-01-31 10:43:09,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616329051] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:43:09,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388935225] [2022-01-31 10:43:09,107 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 10:43:09,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:43:09,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:43:09,108 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:43:09,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-31 10:43:09,178 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-01-31 10:43:09,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:43:09,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 44 conjunts are in the unsatisfiable core [2022-01-31 10:43:09,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:43:09,456 INFO L387 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 [2022-01-31 10:43:09,531 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-31 10:43:09,531 INFO L387 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 25 treesize of output 24 [2022-01-31 10:43:09,605 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-31 10:43:09,605 INFO L387 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 25 treesize of output 24 [2022-01-31 10:43:20,041 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-31 10:43:20,123 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 2 proven. 99 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 10:43:20,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:44:32,434 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_131 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_131)) (forall ((v_ArrVal_377 Int) (v_ArrVal_376 Int) (v_main_~i~0_130 Int)) (or (not (<= (+ v_main_~i~0_131 1) v_main_~i~0_130)) (<= c_main_~k~0 (+ (select (store (store (select |c_#memory_int| |c_main_~#a~0.base|) (+ (* 4 v_main_~i~0_131) |c_main_~#a~0.offset|) v_ArrVal_376) (+ (* 4 v_main_~i~0_130) |c_main_~#a~0.offset|) v_ArrVal_377) (+ 16 |c_main_~#a~0.offset|)) v_main_~i~0_131 v_main_~i~0_130)))))) is different from false [2022-01-31 10:44:32,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2022-01-31 10:44:32,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1866 treesize of output 1834 [2022-01-31 10:44:33,202 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 12 trivial. 6 not checked. [2022-01-31 10:44:33,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388935225] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:44:33,202 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:44:33,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 22] total 63 [2022-01-31 10:44:33,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856607579] [2022-01-31 10:44:33,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:44:33,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 10:44:33,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:44:33,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 10:44:33,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=3482, Unknown=56, NotChecked=120, Total=3906 [2022-01-31 10:44:33,204 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand has 63 states, 60 states have (on average 1.9833333333333334) internal successors, (119), 60 states have internal predecessors, (119), 13 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 10:44:40,101 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~i~0 2))) (and (= c_~N~0 |c_old(~N~0)|) (= |c_#NULL.base| |c_old(#NULL.base)|) (<= (+ .cse0 c_main_~k~0) 2) (<= .cse0 (+ (select (select |c_#memory_int| |c_main_~#a~0.base|) (+ (* c_main_~i~0 4) |c_main_~#a~0.offset|)) 2)) (forall ((v_main_~i~0_131 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_131)) (forall ((v_ArrVal_377 Int) (v_ArrVal_376 Int) (v_main_~i~0_130 Int)) (or (not (<= (+ v_main_~i~0_131 1) v_main_~i~0_130)) (<= c_main_~k~0 (+ (select (store (store (select |c_#memory_int| |c_main_~#a~0.base|) (+ (* 4 v_main_~i~0_131) |c_main_~#a~0.offset|) v_ArrVal_376) (+ (* 4 v_main_~i~0_130) |c_main_~#a~0.offset|) v_ArrVal_377) (+ 16 |c_main_~#a~0.offset|)) v_main_~i~0_131 v_main_~i~0_130)))))) (<= (+ (* c_main_~i~0 3) c_main_~k~0) 2) (<= .cse0 (+ 2 c_main_~j~0)) (= 2 (+ c_main_~i~0 (- 2))) (= |c_#NULL.offset| |c_old(#NULL.offset)|))) is different from false [2022-01-31 10:44:49,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:44:49,310 INFO L93 Difference]: Finished difference Result 117 states and 123 transitions. [2022-01-31 10:44:49,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 10:44:49,310 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 60 states have (on average 1.9833333333333334) internal successors, (119), 60 states have internal predecessors, (119), 13 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 59 [2022-01-31 10:44:49,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:44:49,311 INFO L225 Difference]: With dead ends: 117 [2022-01-31 10:44:49,311 INFO L226 Difference]: Without dead ends: 117 [2022-01-31 10:44:49,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 81 SyntacticMatches, 8 SemanticMatches, 94 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2452 ImplicationChecksByTransitivity, 98.7s TimeCoverageRelationStatistics Valid=592, Invalid=8094, Unknown=64, NotChecked=370, Total=9120 [2022-01-31 10:44:49,313 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 86 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 1845 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 2262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 348 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 10:44:49,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 242 Invalid, 2262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1845 Invalid, 0 Unknown, 348 Unchecked, 0.7s Time] [2022-01-31 10:44:49,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-01-31 10:44:49,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 78. [2022-01-31 10:44:49,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 64 states have (on average 1.09375) internal successors, (70), 65 states have internal predecessors, (70), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 10:44:49,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2022-01-31 10:44:49,315 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 59 [2022-01-31 10:44:49,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:44:49,315 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2022-01-31 10:44:49,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 60 states have (on average 1.9833333333333334) internal successors, (119), 60 states have internal predecessors, (119), 13 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 10:44:49,315 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2022-01-31 10:44:49,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 10:44:49,316 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:44:49,316 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:44:49,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-01-31 10:44:49,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:44:49,532 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:44:49,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:44:49,532 INFO L85 PathProgramCache]: Analyzing trace with hash -550301124, now seen corresponding path program 12 times [2022-01-31 10:44:49,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:44:49,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495945878] [2022-01-31 10:44:49,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:44:49,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:44:49,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:44:49,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:44:49,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:44:49,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-01-31 10:44:49,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:44:49,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 10:44:49,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:44:49,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 10:44:49,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:44:49,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 10:44:49,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:44:49,848 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 8 proven. 89 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 10:44:49,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:44:49,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495945878] [2022-01-31 10:44:49,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495945878] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:44:49,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301270789] [2022-01-31 10:44:49,849 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 10:44:49,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:44:49,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:44:49,850 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:44:49,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-31 10:44:49,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-01-31 10:44:49,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:44:49,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-31 10:44:49,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:44:50,232 INFO L387 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 [2022-01-31 10:45:09,602 INFO L353 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-01-31 10:45:09,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 10 [2022-01-31 10:45:09,684 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 28 proven. 69 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 10:45:09,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:45:11,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301270789] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:45:11,832 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:45:11,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 45 [2022-01-31 10:45:11,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637883501] [2022-01-31 10:45:11,832 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:45:11,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 10:45:11,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:45:11,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 10:45:11,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2093, Unknown=4, NotChecked=0, Total=2256 [2022-01-31 10:45:11,833 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand has 45 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 11 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 10:45:12,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:45:12,834 INFO L93 Difference]: Finished difference Result 120 states and 125 transitions. [2022-01-31 10:45:12,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 10:45:12,835 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 11 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2022-01-31 10:45:12,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:45:12,835 INFO L225 Difference]: With dead ends: 120 [2022-01-31 10:45:12,835 INFO L226 Difference]: Without dead ends: 78 [2022-01-31 10:45:12,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 50 SyntacticMatches, 9 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1700 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=424, Invalid=5272, Unknown=4, NotChecked=0, Total=5700 [2022-01-31 10:45:12,836 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 55 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 1298 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 1536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 194 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 10:45:12,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 263 Invalid, 1536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1298 Invalid, 0 Unknown, 194 Unchecked, 0.5s Time] [2022-01-31 10:45:12,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-01-31 10:45:12,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-01-31 10:45:12,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 64 states have (on average 1.078125) internal successors, (69), 65 states have internal predecessors, (69), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 10:45:12,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2022-01-31 10:45:12,838 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 64 [2022-01-31 10:45:12,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:45:12,839 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2022-01-31 10:45:12,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 11 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 10:45:12,839 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2022-01-31 10:45:12,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-31 10:45:12,839 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:45:12,839 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:45:12,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-31 10:45:13,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:45:13,048 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:45:13,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:45:13,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1060613013, now seen corresponding path program 13 times [2022-01-31 10:45:13,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:45:13,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053862621] [2022-01-31 10:45:13,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:45:13,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:45:13,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:45:13,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:45:13,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:45:13,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-31 10:45:13,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:45:13,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 10:45:13,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:45:13,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-31 10:45:13,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:45:13,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-01-31 10:45:13,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:45:13,400 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 8 proven. 109 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 10:45:13,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:45:13,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053862621] [2022-01-31 10:45:13,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053862621] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:45:13,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360261293] [2022-01-31 10:45:13,400 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 10:45:13,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:45:13,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:45:13,401 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:45:13,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-31 10:45:13,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:45:13,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 46 conjunts are in the unsatisfiable core [2022-01-31 10:45:13,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:45:13,795 INFO L387 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 [2022-01-31 10:45:13,871 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-31 10:45:13,872 INFO L387 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 25 treesize of output 24 [2022-01-31 10:45:32,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-31 10:45:33,025 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 10:45:33,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:46:15,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-01-31 10:46:15,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 210 treesize of output 202 [2022-01-31 10:46:15,990 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 8 proven. 109 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 10:46:15,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360261293] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:46:15,990 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:46:15,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 23] total 65 [2022-01-31 10:46:15,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923104340] [2022-01-31 10:46:15,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:46:15,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 10:46:15,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:46:15,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 10:46:15,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=3891, Unknown=21, NotChecked=0, Total=4160 [2022-01-31 10:46:15,992 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 65 states, 63 states have (on average 2.0317460317460316) internal successors, (128), 62 states have internal predecessors, (128), 15 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-31 10:46:21,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:46:21,170 INFO L93 Difference]: Finished difference Result 123 states and 128 transitions. [2022-01-31 10:46:21,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 10:46:21,171 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 63 states have (on average 2.0317460317460316) internal successors, (128), 62 states have internal predecessors, (128), 15 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 67 [2022-01-31 10:46:21,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:46:21,172 INFO L225 Difference]: With dead ends: 123 [2022-01-31 10:46:21,172 INFO L226 Difference]: Without dead ends: 123 [2022-01-31 10:46:21,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 96 SyntacticMatches, 10 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2192 ImplicationChecksByTransitivity, 66.7s TimeCoverageRelationStatistics Valid=457, Invalid=7176, Unknown=23, NotChecked=0, Total=7656 [2022-01-31 10:46:21,173 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 76 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 1757 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 2002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 188 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 10:46:21,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 314 Invalid, 2002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1757 Invalid, 0 Unknown, 188 Unchecked, 0.6s Time] [2022-01-31 10:46:21,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-01-31 10:46:21,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2022-01-31 10:46:21,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 71 states have (on average 1.0704225352112675) internal successors, (76), 72 states have internal predecessors, (76), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 10:46:21,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2022-01-31 10:46:21,176 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 67 [2022-01-31 10:46:21,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:46:21,176 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2022-01-31 10:46:21,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 63 states have (on average 2.0317460317460316) internal successors, (128), 62 states have internal predecessors, (128), 15 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-31 10:46:21,176 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2022-01-31 10:46:21,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 10:46:21,177 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:46:21,177 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:46:21,194 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-01-31 10:46:21,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:46:21,385 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:46:21,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:46:21,386 INFO L85 PathProgramCache]: Analyzing trace with hash -160897124, now seen corresponding path program 14 times [2022-01-31 10:46:21,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:46:21,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050146249] [2022-01-31 10:46:21,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:46:21,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:46:21,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:46:21,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:46:21,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:46:21,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 10:46:21,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:46:21,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 10:46:21,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:46:21,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 10:46:21,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:46:21,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 10:46:21,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:46:21,787 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 8 proven. 132 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 10:46:21,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:46:21,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050146249] [2022-01-31 10:46:21,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050146249] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:46:21,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25832422] [2022-01-31 10:46:21,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 10:46:21,788 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:46:21,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:46:21,789 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:46:21,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-31 10:46:21,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 10:46:21,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:46:21,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 50 conjunts are in the unsatisfiable core [2022-01-31 10:46:21,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:46:22,216 INFO L387 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 [2022-01-31 10:46:22,291 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-31 10:46:22,291 INFO L387 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 25 treesize of output 24 [2022-01-31 10:46:22,371 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-31 10:46:22,371 INFO L387 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 25 treesize of output 24 [2022-01-31 10:46:43,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-31 10:46:43,100 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 2 proven. 138 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 10:46:43,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:47:57,258 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_166 Int)) (or (forall ((v_ArrVal_486 Int) (v_main_~i~0_165 Int) (v_ArrVal_483 Int)) (or (not (<= (+ v_main_~i~0_166 1) v_main_~i~0_165)) (<= c_main_~k~0 (+ (select (store (store (select |c_#memory_int| |c_main_~#a~0.base|) (+ (* 4 v_main_~i~0_166) |c_main_~#a~0.offset|) v_ArrVal_483) (+ (* 4 v_main_~i~0_165) |c_main_~#a~0.offset|) v_ArrVal_486) (+ 20 |c_main_~#a~0.offset|)) v_main_~i~0_166 v_main_~i~0_165)))) (not (<= (+ c_main_~i~0 1) v_main_~i~0_166)))) is different from false [2022-01-31 10:47:57,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2022-01-31 10:47:57,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 214 treesize of output 210 [2022-01-31 10:47:57,995 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 8 proven. 125 refuted. 0 times theorem prover too weak. 24 trivial. 7 not checked. [2022-01-31 10:47:57,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25832422] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:47:57,996 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:47:57,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 25] total 72 [2022-01-31 10:47:57,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140449185] [2022-01-31 10:47:57,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:47:57,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-01-31 10:47:57,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:47:57,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-01-31 10:47:57,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=4624, Unknown=63, NotChecked=138, Total=5112 [2022-01-31 10:47:57,997 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand has 72 states, 69 states have (on average 1.9855072463768115) internal successors, (137), 69 states have internal predecessors, (137), 16 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-31 10:48:04,113 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_main_~i~0_166 Int)) (or (forall ((v_ArrVal_486 Int) (v_main_~i~0_165 Int) (v_ArrVal_483 Int)) (or (not (<= (+ v_main_~i~0_166 1) v_main_~i~0_165)) (<= c_main_~k~0 (+ (select (store (store (select |c_#memory_int| |c_main_~#a~0.base|) (+ (* 4 v_main_~i~0_166) |c_main_~#a~0.offset|) v_ArrVal_483) (+ (* 4 v_main_~i~0_165) |c_main_~#a~0.offset|) v_ArrVal_486) (+ 20 |c_main_~#a~0.offset|)) v_main_~i~0_166 v_main_~i~0_165)))) (not (<= (+ c_main_~i~0 1) v_main_~i~0_166)))) (= c_~N~0 |c_old(~N~0)|) (= |c_#NULL.base| |c_old(#NULL.base)|) (<= 10 (select (select |c_#memory_int| |c_main_~#a~0.base|) (+ (* c_main_~i~0 4) |c_main_~#a~0.offset|))) (<= (+ c_main_~i~0 10 c_main_~k~0) 0) (= c_main_~i~0 5) (<= (+ 10 c_main_~k~0) 0) (<= 10 c_main_~j~0) (= |c_#NULL.offset| |c_old(#NULL.offset)|)) is different from false [2022-01-31 10:48:05,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:48:05,811 INFO L93 Difference]: Finished difference Result 133 states and 138 transitions. [2022-01-31 10:48:05,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 10:48:05,811 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 69 states have (on average 1.9855072463768115) internal successors, (137), 69 states have internal predecessors, (137), 16 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 70 [2022-01-31 10:48:05,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:48:05,812 INFO L225 Difference]: With dead ends: 133 [2022-01-31 10:48:05,812 INFO L226 Difference]: Without dead ends: 133 [2022-01-31 10:48:05,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 100 SyntacticMatches, 10 SemanticMatches, 106 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 3148 ImplicationChecksByTransitivity, 102.8s TimeCoverageRelationStatistics Valid=726, Invalid=10340, Unknown=72, NotChecked=418, Total=11556 [2022-01-31 10:48:05,814 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 151 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 1694 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 2776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 945 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 10:48:05,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 293 Invalid, 2776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1694 Invalid, 0 Unknown, 945 Unchecked, 0.6s Time] [2022-01-31 10:48:05,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-01-31 10:48:05,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 86. [2022-01-31 10:48:05,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 70 states have (on average 1.0714285714285714) internal successors, (75), 71 states have internal predecessors, (75), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 10:48:05,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2022-01-31 10:48:05,816 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 70 [2022-01-31 10:48:05,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:48:05,816 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2022-01-31 10:48:05,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 69 states have (on average 1.9855072463768115) internal successors, (137), 69 states have internal predecessors, (137), 16 states have call successors, (18), 5 states have call predecessors, (18), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-31 10:48:05,817 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2022-01-31 10:48:05,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 10:48:05,817 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:48:05,817 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:48:05,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-31 10:48:06,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:48:06,024 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:48:06,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:48:06,024 INFO L85 PathProgramCache]: Analyzing trace with hash -928425590, now seen corresponding path program 15 times [2022-01-31 10:48:06,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:48:06,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733328476] [2022-01-31 10:48:06,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:48:06,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:48:06,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:48:06,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:48:06,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:48:06,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-31 10:48:06,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:48:06,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 10:48:06,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:48:06,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-31 10:48:06,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:48:06,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-01-31 10:48:06,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:48:06,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-01-31 10:48:06,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:48:06,410 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 10 proven. 127 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 10:48:06,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:48:06,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733328476] [2022-01-31 10:48:06,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733328476] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:48:06,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216062065] [2022-01-31 10:48:06,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 10:48:06,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:48:06,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:48:06,412 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:48:06,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-31 10:48:06,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-01-31 10:48:06,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:48:06,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 44 conjunts are in the unsatisfiable core [2022-01-31 10:48:06,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:48:06,964 INFO L387 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 [2022-01-31 10:48:47,783 INFO L353 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-01-31 10:48:47,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 10 [2022-01-31 10:48:47,878 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 45 proven. 92 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 10:48:47,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:48:50,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216062065] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:48:50,029 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:48:50,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 51 [2022-01-31 10:48:50,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610451125] [2022-01-31 10:48:50,029 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:48:50,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 10:48:50,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:48:50,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 10:48:50,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=2672, Unknown=6, NotChecked=0, Total=2862 [2022-01-31 10:48:50,030 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand has 51 states, 49 states have (on average 1.9591836734693877) internal successors, (96), 48 states have internal predecessors, (96), 13 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-31 10:48:51,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:48:51,148 INFO L93 Difference]: Finished difference Result 136 states and 140 transitions. [2022-01-31 10:48:51,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 10:48:51,149 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 49 states have (on average 1.9591836734693877) internal successors, (96), 48 states have internal predecessors, (96), 13 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 75 [2022-01-31 10:48:51,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:48:51,149 INFO L225 Difference]: With dead ends: 136 [2022-01-31 10:48:51,149 INFO L226 Difference]: Without dead ends: 86 [2022-01-31 10:48:51,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 58 SyntacticMatches, 11 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2250 ImplicationChecksByTransitivity, 43.9s TimeCoverageRelationStatistics Valid=492, Invalid=6812, Unknown=6, NotChecked=0, Total=7310 [2022-01-31 10:48:51,151 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 72 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 1400 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 1634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 189 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 10:48:51,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 289 Invalid, 1634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1400 Invalid, 0 Unknown, 189 Unchecked, 0.5s Time] [2022-01-31 10:48:51,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-01-31 10:48:51,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-01-31 10:48:51,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 71 states have internal predecessors, (74), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 10:48:51,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2022-01-31 10:48:51,153 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 75 [2022-01-31 10:48:51,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:48:51,153 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2022-01-31 10:48:51,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 49 states have (on average 1.9591836734693877) internal successors, (96), 48 states have internal predecessors, (96), 13 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-31 10:48:51,153 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2022-01-31 10:48:51,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 10:48:51,154 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:48:51,154 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:48:51,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-31 10:48:51,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-01-31 10:48:51,368 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:48:51,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:48:51,368 INFO L85 PathProgramCache]: Analyzing trace with hash -692216175, now seen corresponding path program 16 times [2022-01-31 10:48:51,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:48:51,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893913862] [2022-01-31 10:48:51,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:48:51,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:48:51,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:48:51,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:48:51,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:48:51,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 10:48:51,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:48:51,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 10:48:51,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:48:51,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 10:48:51,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:48:51,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 10:48:51,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:48:51,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 10:48:51,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:48:51,796 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 10 proven. 150 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 10:48:51,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:48:51,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893913862] [2022-01-31 10:48:51,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893913862] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:48:51,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439351476] [2022-01-31 10:48:51,796 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 10:48:51,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:48:51,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:48:51,797 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:48:51,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-31 10:48:51,865 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 10:48:51,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:48:51,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 52 conjunts are in the unsatisfiable core [2022-01-31 10:48:51,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:48:52,273 INFO L387 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 [2022-01-31 10:48:52,356 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-31 10:48:52,356 INFO L387 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 25 treesize of output 24 [2022-01-31 10:49:17,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-31 10:49:17,810 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 160 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 10:49:17,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:49:58,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-01-31 10:49:58,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 210 treesize of output 202 [2022-01-31 10:49:58,958 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 10 proven. 150 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 10:49:58,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439351476] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:49:58,959 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:49:58,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 26] total 75 [2022-01-31 10:49:58,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153898647] [2022-01-31 10:49:58,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:49:58,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 10:49:58,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:49:58,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 10:49:58,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=5239, Unknown=20, NotChecked=0, Total=5550 [2022-01-31 10:49:58,960 INFO L87 Difference]: Start difference. First operand 86 states and 89 transitions. Second operand has 75 states, 72 states have (on average 2.0277777777777777) internal successors, (146), 72 states have internal predecessors, (146), 19 states have call successors, (21), 5 states have call predecessors, (21), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-01-31 10:50:00,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:50:00,407 INFO L93 Difference]: Finished difference Result 96 states and 99 transitions. [2022-01-31 10:50:00,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 10:50:00,408 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 72 states have (on average 2.0277777777777777) internal successors, (146), 72 states have internal predecessors, (146), 19 states have call successors, (21), 5 states have call predecessors, (21), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 78 [2022-01-31 10:50:00,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:50:00,408 INFO L225 Difference]: With dead ends: 96 [2022-01-31 10:50:00,408 INFO L226 Difference]: Without dead ends: 96 [2022-01-31 10:50:00,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 114 SyntacticMatches, 12 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3059 ImplicationChecksByTransitivity, 67.5s TimeCoverageRelationStatistics Valid=571, Invalid=9915, Unknown=20, NotChecked=0, Total=10506 [2022-01-31 10:50:00,409 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 99 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 1885 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 2146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 192 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 10:50:00,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 370 Invalid, 2146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1885 Invalid, 0 Unknown, 192 Unchecked, 0.7s Time] [2022-01-31 10:50:00,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-01-31 10:50:00,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2022-01-31 10:50:00,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 77 states have internal predecessors, (80), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 10:50:00,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 97 transitions. [2022-01-31 10:50:00,412 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 97 transitions. Word has length 78 [2022-01-31 10:50:00,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:50:00,412 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 97 transitions. [2022-01-31 10:50:00,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 72 states have (on average 2.0277777777777777) internal successors, (146), 72 states have internal predecessors, (146), 19 states have call successors, (21), 5 states have call predecessors, (21), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-01-31 10:50:00,412 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 97 transitions. [2022-01-31 10:50:00,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-31 10:50:00,413 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:50:00,413 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:50:00,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-31 10:50:00,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-01-31 10:50:00,630 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:50:00,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:50:00,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1350922106, now seen corresponding path program 17 times [2022-01-31 10:50:00,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:50:00,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191642205] [2022-01-31 10:50:00,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:50:00,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:50:00,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:50:01,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:50:01,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:50:01,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 10:50:01,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:50:01,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 10:50:01,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:50:01,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 10:50:01,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:50:01,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 10:50:01,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:50:01,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 10:50:01,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:50:01,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 10:50:01,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:50:01,094 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 12 proven. 172 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 10:50:01,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:50:01,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191642205] [2022-01-31 10:50:01,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191642205] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:50:01,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568556838] [2022-01-31 10:50:01,094 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 10:50:01,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:50:01,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:50:01,096 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:50:01,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-31 10:50:01,252 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-01-31 10:50:01,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:50:01,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 54 conjunts are in the unsatisfiable core [2022-01-31 10:50:01,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:50:01,765 INFO L387 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 13 treesize of output 9 [2022-01-31 10:50:36,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-31 10:50:36,835 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 10:50:36,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:50:39,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-01-31 10:50:39,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 36 treesize of output 32 [2022-01-31 10:50:40,009 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 12 proven. 172 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 10:50:40,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568556838] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:50:40,010 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:50:40,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 28, 27] total 79 [2022-01-31 10:50:40,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57190457] [2022-01-31 10:50:40,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:50:40,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-01-31 10:50:40,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:50:40,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-01-31 10:50:40,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=5849, Unknown=3, NotChecked=0, Total=6162 [2022-01-31 10:50:40,012 INFO L87 Difference]: Start difference. First operand 94 states and 97 transitions. Second operand has 79 states, 76 states have (on average 2.039473684210526) internal successors, (155), 76 states have internal predecessors, (155), 22 states have call successors, (24), 5 states have call predecessors, (24), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-01-31 10:50:41,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:50:41,543 INFO L93 Difference]: Finished difference Result 155 states and 159 transitions. [2022-01-31 10:50:41,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 10:50:41,543 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 76 states have (on average 2.039473684210526) internal successors, (155), 76 states have internal predecessors, (155), 22 states have call successors, (24), 5 states have call predecessors, (24), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Word has length 86 [2022-01-31 10:50:41,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:50:41,544 INFO L225 Difference]: With dead ends: 155 [2022-01-31 10:50:41,544 INFO L226 Difference]: Without dead ends: 155 [2022-01-31 10:50:41,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 130 SyntacticMatches, 14 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3464 ImplicationChecksByTransitivity, 39.1s TimeCoverageRelationStatistics Valid=569, Invalid=10770, Unknown=3, NotChecked=0, Total=11342 [2022-01-31 10:50:41,545 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 85 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 2068 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 2766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 2068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 635 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 10:50:41,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 491 Invalid, 2766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 2068 Invalid, 0 Unknown, 635 Unchecked, 0.8s Time] [2022-01-31 10:50:41,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-01-31 10:50:41,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 103. [2022-01-31 10:50:41,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 84 states have internal predecessors, (87), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 10:50:41,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 106 transitions. [2022-01-31 10:50:41,549 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 106 transitions. Word has length 86 [2022-01-31 10:50:41,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:50:41,549 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 106 transitions. [2022-01-31 10:50:41,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 76 states have (on average 2.039473684210526) internal successors, (155), 76 states have internal predecessors, (155), 22 states have call successors, (24), 5 states have call predecessors, (24), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-01-31 10:50:41,549 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 106 transitions. [2022-01-31 10:50:41,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-31 10:50:41,550 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:50:41,550 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:50:41,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-31 10:50:41,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:50:41,760 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:50:41,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:50:41,760 INFO L85 PathProgramCache]: Analyzing trace with hash -464211681, now seen corresponding path program 18 times [2022-01-31 10:50:41,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:50:41,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107532214] [2022-01-31 10:50:41,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:50:41,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:50:41,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:50:42,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:50:42,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:50:42,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-31 10:50:42,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:50:42,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-31 10:50:42,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:50:42,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-31 10:50:42,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:50:42,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-01-31 10:50:42,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:50:42,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-01-31 10:50:42,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:50:42,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-01-31 10:50:42,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:50:42,338 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 12 proven. 198 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 10:50:42,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:50:42,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107532214] [2022-01-31 10:50:42,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107532214] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:50:42,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703478718] [2022-01-31 10:50:42,338 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 10:50:42,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:50:42,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:50:42,340 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:50:42,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-31 10:50:42,570 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-01-31 10:50:42,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:50:42,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 58 conjunts are in the unsatisfiable core [2022-01-31 10:50:42,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:50:43,104 INFO L387 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 [2022-01-31 10:50:43,193 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-31 10:50:43,193 INFO L387 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 25 treesize of output 24 [2022-01-31 10:51:28,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-01-31 10:51:28,345 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 10:51:28,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:52:08,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-01-31 10:52:08,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 94 treesize of output 90 [2022-01-31 10:52:09,731 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 12 proven. 198 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 10:52:09,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703478718] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:52:09,731 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:52:09,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 29] total 84 [2022-01-31 10:52:09,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409957763] [2022-01-31 10:52:09,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:52:09,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-31 10:52:09,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:52:09,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-31 10:52:09,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=6617, Unknown=25, NotChecked=0, Total=6972 [2022-01-31 10:52:09,734 INFO L87 Difference]: Start difference. First operand 103 states and 106 transitions. Second operand has 84 states, 81 states have (on average 2.0246913580246915) internal successors, (164), 81 states have internal predecessors, (164), 22 states have call successors, (24), 5 states have call predecessors, (24), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-01-31 10:52:31,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:52:31,688 INFO L93 Difference]: Finished difference Result 197 states and 208 transitions. [2022-01-31 10:52:31,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 10:52:31,689 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 81 states have (on average 2.0246913580246915) internal successors, (164), 81 states have internal predecessors, (164), 22 states have call successors, (24), 5 states have call predecessors, (24), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Word has length 89 [2022-01-31 10:52:31,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:52:31,690 INFO L225 Difference]: With dead ends: 197 [2022-01-31 10:52:31,690 INFO L226 Difference]: Without dead ends: 197 [2022-01-31 10:52:31,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 128 SyntacticMatches, 14 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4667 ImplicationChecksByTransitivity, 107.5s TimeCoverageRelationStatistics Valid=736, Invalid=14977, Unknown=37, NotChecked=0, Total=15750 [2022-01-31 10:52:31,691 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 114 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 3412 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 3887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 3412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 377 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:52:31,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 444 Invalid, 3887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 3412 Invalid, 0 Unknown, 377 Unchecked, 1.2s Time] [2022-01-31 10:52:31,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-01-31 10:52:31,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 104. [2022-01-31 10:52:31,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 84 states have (on average 1.0595238095238095) internal successors, (89), 85 states have internal predecessors, (89), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 10:52:31,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2022-01-31 10:52:31,695 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 89 [2022-01-31 10:52:31,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:52:31,695 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2022-01-31 10:52:31,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 81 states have (on average 2.0246913580246915) internal successors, (164), 81 states have internal predecessors, (164), 22 states have call successors, (24), 5 states have call predecessors, (24), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-01-31 10:52:31,695 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2022-01-31 10:52:31,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-01-31 10:52:31,695 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:52:31,696 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:52:31,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-31 10:52:31,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:52:31,903 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:52:31,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:52:31,904 INFO L85 PathProgramCache]: Analyzing trace with hash -511792936, now seen corresponding path program 1 times [2022-01-31 10:52:31,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:52:31,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440880314] [2022-01-31 10:52:31,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:52:31,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:52:31,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:52:32,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:52:32,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:52:32,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 10:52:32,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:52:32,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-31 10:52:32,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:52:32,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-01-31 10:52:32,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:52:32,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-01-31 10:52:32,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:52:32,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-01-31 10:52:32,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:52:32,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-01-31 10:52:32,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:52:32,023 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 12 proven. 145 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-01-31 10:52:32,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:52:32,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440880314] [2022-01-31 10:52:32,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440880314] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:52:32,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620465309] [2022-01-31 10:52:32,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:52:32,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:52:32,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:52:32,024 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:52:32,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-31 10:52:32,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:52:32,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-31 10:52:32,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:52:32,372 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-01-31 10:52:32,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:52:32,631 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 12 proven. 145 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-01-31 10:52:32,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620465309] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:52:32,632 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 10:52:32,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 38 [2022-01-31 10:52:32,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83321915] [2022-01-31 10:52:32,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 10:52:32,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 10:52:32,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:52:32,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 10:52:32,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=825, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 10:52:32,633 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand has 38 states, 38 states have (on average 2.973684210526316) internal successors, (113), 37 states have internal predecessors, (113), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 10:52:33,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:52:33,201 INFO L93 Difference]: Finished difference Result 520 states and 634 transitions. [2022-01-31 10:52:33,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 10:52:33,203 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.973684210526316) internal successors, (113), 37 states have internal predecessors, (113), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 91 [2022-01-31 10:52:33,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:52:33,205 INFO L225 Difference]: With dead ends: 520 [2022-01-31 10:52:33,205 INFO L226 Difference]: Without dead ends: 520 [2022-01-31 10:52:33,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1268, Invalid=2392, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 10:52:33,206 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 340 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:52:33,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 30 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 10:52:33,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-01-31 10:52:33,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 139. [2022-01-31 10:52:33,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 119 states have (on average 1.134453781512605) internal successors, (135), 120 states have internal predecessors, (135), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 10:52:33,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 154 transitions. [2022-01-31 10:52:33,224 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 154 transitions. Word has length 91 [2022-01-31 10:52:33,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:52:33,224 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 154 transitions. [2022-01-31 10:52:33,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.973684210526316) internal successors, (113), 37 states have internal predecessors, (113), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 10:52:33,224 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 154 transitions. [2022-01-31 10:52:33,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-31 10:52:33,225 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:52:33,225 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:52:33,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-31 10:52:33,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-31 10:52:33,448 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:52:33,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:52:33,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1477189094, now seen corresponding path program 19 times [2022-01-31 10:52:33,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:52:33,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528707825] [2022-01-31 10:52:33,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:52:33,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:52:33,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:52:33,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:52:33,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:52:33,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 10:52:33,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:52:33,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 10:52:34,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:52:34,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 10:52:34,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:52:34,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 10:52:34,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:52:34,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 10:52:34,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:52:34,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 10:52:34,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:52:34,012 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 12 proven. 227 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 10:52:34,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:52:34,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528707825] [2022-01-31 10:52:34,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528707825] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:52:34,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408949859] [2022-01-31 10:52:34,012 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 10:52:34,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:52:34,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:52:34,014 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:52:34,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-31 10:52:34,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:52:34,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 62 conjunts are in the unsatisfiable core [2022-01-31 10:52:34,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:52:34,621 INFO L387 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 [2022-01-31 10:52:34,712 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-31 10:52:34,712 INFO L387 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 25 treesize of output 24 [2022-01-31 10:52:34,800 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-31 10:52:34,800 INFO L387 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 25 treesize of output 24