/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-tiling/mlceu.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 08:51:10,932 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 08:51:10,934 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 08:51:10,991 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 08:51:10,991 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 08:51:10,992 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 08:51:10,993 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 08:51:10,994 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 08:51:10,995 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 08:51:10,995 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 08:51:10,996 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 08:51:10,996 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 08:51:10,997 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 08:51:10,997 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 08:51:10,998 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 08:51:10,999 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 08:51:10,999 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 08:51:11,000 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 08:51:11,001 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 08:51:11,002 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 08:51:11,003 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 08:51:11,004 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 08:51:11,004 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 08:51:11,005 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 08:51:11,007 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 08:51:11,012 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 08:51:11,012 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 08:51:11,013 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 08:51:11,014 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 08:51:11,020 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 08:51:11,020 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 08:51:11,021 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 08:51:11,021 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 08:51:11,021 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 08:51:11,021 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 08:51:11,021 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 08:51:11,021 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 08:51:11,021 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 08:51:11,021 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 08:51:11,022 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 08:51:11,022 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 08:51:11,022 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 08:51:11,022 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 08:51:11,022 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 08:51:11,022 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 08:51:11,022 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 08:51:11,022 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 08:51:11,022 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:51:11,022 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 08:51:11,022 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 08:51:11,023 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 08:51:11,023 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 08:51:11,166 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 08:51:11,185 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 08:51:11,187 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 08:51:11,188 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 08:51:11,189 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 08:51:11,190 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/mlceu.c [2022-01-31 08:51:11,246 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33a459b89/ff517af186bd40838964cb045729e6eb/FLAG205419864 [2022-01-31 08:51:11,642 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 08:51:11,643 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/mlceu.c [2022-01-31 08:51:11,650 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33a459b89/ff517af186bd40838964cb045729e6eb/FLAG205419864 [2022-01-31 08:51:11,664 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33a459b89/ff517af186bd40838964cb045729e6eb [2022-01-31 08:51:11,666 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 08:51:11,667 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 08:51:11,669 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 08:51:11,669 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 08:51:11,672 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 08:51:11,673 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:51:11" (1/1) ... [2022-01-31 08:51:11,674 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d3109e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:51:11, skipping insertion in model container [2022-01-31 08:51:11,674 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:51:11" (1/1) ... [2022-01-31 08:51:11,678 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 08:51:11,688 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 08:51:11,827 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-tiling/mlceu.c[396,409] [2022-01-31 08:51:11,841 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:51:11,847 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 08:51:11,867 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-tiling/mlceu.c[396,409] [2022-01-31 08:51:11,874 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:51:11,924 INFO L208 MainTranslator]: Completed translation [2022-01-31 08:51:11,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:51:11 WrapperNode [2022-01-31 08:51:11,930 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 08:51:11,931 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 08:51:11,931 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 08:51:11,932 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 08:51:11,943 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:51:11" (1/1) ... [2022-01-31 08:51:11,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:51:11" (1/1) ... [2022-01-31 08:51:11,950 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:51:11" (1/1) ... [2022-01-31 08:51:11,951 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:51:11" (1/1) ... [2022-01-31 08:51:11,961 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:51:11" (1/1) ... [2022-01-31 08:51:11,965 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:51:11" (1/1) ... [2022-01-31 08:51:11,969 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:51:11" (1/1) ... [2022-01-31 08:51:11,971 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 08:51:11,972 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 08:51:11,973 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 08:51:11,973 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 08:51:11,974 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:51:11" (1/1) ... [2022-01-31 08:51:11,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:51:11,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:51:12,016 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 08:51:12,040 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 08:51:12,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 08:51:12,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 08:51:12,066 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 08:51:12,066 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 08:51:12,066 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 08:51:12,066 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 08:51:12,067 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 08:51:12,067 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 08:51:12,067 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 08:51:12,068 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 08:51:12,068 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 08:51:12,068 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 08:51:12,068 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 08:51:12,068 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-01-31 08:51:12,068 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 08:51:12,068 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-31 08:51:12,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 08:51:12,068 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 08:51:12,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 08:51:12,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 08:51:12,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 08:51:12,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 08:51:12,120 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 08:51:12,121 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 08:51:12,271 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 08:51:12,275 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 08:51:12,275 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 08:51:12,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:51:12 BoogieIcfgContainer [2022-01-31 08:51:12,276 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 08:51:12,277 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 08:51:12,277 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 08:51:12,284 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 08:51:12,286 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:51:12" (1/1) ... [2022-01-31 08:51:12,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:51:12 BasicIcfg [2022-01-31 08:51:12,297 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 08:51:12,298 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 08:51:12,298 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 08:51:12,304 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 08:51:12,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 08:51:11" (1/4) ... [2022-01-31 08:51:12,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b0a2862 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:51:12, skipping insertion in model container [2022-01-31 08:51:12,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:51:11" (2/4) ... [2022-01-31 08:51:12,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b0a2862 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:51:12, skipping insertion in model container [2022-01-31 08:51:12,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:51:12" (3/4) ... [2022-01-31 08:51:12,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b0a2862 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 08:51:12, skipping insertion in model container [2022-01-31 08:51:12,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:51:12" (4/4) ... [2022-01-31 08:51:12,306 INFO L111 eAbstractionObserver]: Analyzing ICFG mlceu.cJordan [2022-01-31 08:51:12,310 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 08:51:12,310 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 08:51:12,347 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 08:51:12,354 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 08:51:12,354 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 08:51:12,364 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:51:12,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 08:51:12,371 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:51:12,372 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:51:12,372 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:51:12,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:51:12,375 INFO L85 PathProgramCache]: Analyzing trace with hash -339274201, now seen corresponding path program 1 times [2022-01-31 08:51:12,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:51:12,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057216301] [2022-01-31 08:51:12,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:51:12,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:51:12,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:12,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:51:12,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:12,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:51:12,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:12,557 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 08:51:12,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:51:12,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057216301] [2022-01-31 08:51:12,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057216301] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:51:12,558 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:51:12,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 08:51:12,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64346075] [2022-01-31 08:51:12,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:51:12,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 08:51:12,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:51:12,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 08:51:12,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 08:51:12,587 INFO L87 Difference]: Start difference. First operand has 32 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 08:51:12,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:51:12,638 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2022-01-31 08:51:12,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 08:51:12,640 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2022-01-31 08:51:12,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:51:12,644 INFO L225 Difference]: With dead ends: 32 [2022-01-31 08:51:12,644 INFO L226 Difference]: Without dead ends: 27 [2022-01-31 08:51:12,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 08:51:12,649 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:51:12,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 39 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:51:12,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-31 08:51:12,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-01-31 08:51:12,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 08:51:12,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2022-01-31 08:51:12,673 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 20 [2022-01-31 08:51:12,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:51:12,674 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2022-01-31 08:51:12,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 08:51:12,675 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2022-01-31 08:51:12,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 08:51:12,676 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:51:12,676 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:51:12,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 08:51:12,676 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:51:12,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:51:12,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1248721879, now seen corresponding path program 1 times [2022-01-31 08:51:12,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:51:12,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277561671] [2022-01-31 08:51:12,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:51:12,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:51:12,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:12,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:51:12,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:12,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:51:12,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:12,786 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 08:51:12,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:51:12,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277561671] [2022-01-31 08:51:12,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277561671] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:51:12,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:51:12,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 08:51:12,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969195321] [2022-01-31 08:51:12,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:51:12,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 08:51:12,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:51:12,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 08:51:12,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 08:51:12,789 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 08:51:12,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:51:12,852 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2022-01-31 08:51:12,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 08:51:12,853 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-01-31 08:51:12,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:51:12,855 INFO L225 Difference]: With dead ends: 34 [2022-01-31 08:51:12,855 INFO L226 Difference]: Without dead ends: 34 [2022-01-31 08:51:12,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 08:51:12,856 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 31 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:51:12,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 31 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:51:12,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-31 08:51:12,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2022-01-31 08:51:12,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 08:51:12,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-01-31 08:51:12,862 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 20 [2022-01-31 08:51:12,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:51:12,862 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-01-31 08:51:12,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 08:51:12,863 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-01-31 08:51:12,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-31 08:51:12,863 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:51:12,863 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:51:12,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 08:51:12,864 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:51:12,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:51:12,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1290502879, now seen corresponding path program 1 times [2022-01-31 08:51:12,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:51:12,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037541212] [2022-01-31 08:51:12,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:51:12,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:51:12,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:13,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:51:13,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:13,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:51:13,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:13,023 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 08:51:13,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:51:13,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037541212] [2022-01-31 08:51:13,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037541212] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:51:13,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478261003] [2022-01-31 08:51:13,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:51:13,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:51:13,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:51:13,026 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 08:51:13,027 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 08:51:13,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:13,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-31 08:51:13,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:51:13,150 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 11 treesize of output 7 [2022-01-31 08:51:13,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-31 08:51:13,205 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 08:51:13,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:51:13,250 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 14 treesize of output 12 [2022-01-31 08:51:13,252 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 22 treesize of output 20 [2022-01-31 08:51:13,283 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 08:51:13,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478261003] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:51:13,283 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:51:13,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2022-01-31 08:51:13,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410447775] [2022-01-31 08:51:13,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:51:13,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 08:51:13,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:51:13,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 08:51:13,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-01-31 08:51:13,285 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 08:51:13,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:51:13,414 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2022-01-31 08:51:13,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 08:51:13,415 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2022-01-31 08:51:13,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:51:13,415 INFO L225 Difference]: With dead ends: 39 [2022-01-31 08:51:13,416 INFO L226 Difference]: Without dead ends: 39 [2022-01-31 08:51:13,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-01-31 08:51:13,417 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 32 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:51:13,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 111 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:51:13,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-31 08:51:13,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2022-01-31 08:51:13,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.12) internal successors, (28), 26 states have internal predecessors, (28), 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 08:51:13,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2022-01-31 08:51:13,420 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 23 [2022-01-31 08:51:13,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:51:13,420 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2022-01-31 08:51:13,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 08:51:13,421 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2022-01-31 08:51:13,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 08:51:13,421 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:51:13,421 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:51:13,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 08:51:13,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:51:13,636 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:51:13,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:51:13,636 INFO L85 PathProgramCache]: Analyzing trace with hash 419104659, now seen corresponding path program 1 times [2022-01-31 08:51:13,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:51:13,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227766209] [2022-01-31 08:51:13,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:51:13,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:51:13,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:13,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:51:13,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:13,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:51:13,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:13,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-01-31 08:51:13,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:13,695 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:51:13,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:51:13,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227766209] [2022-01-31 08:51:13,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227766209] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:51:13,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68131452] [2022-01-31 08:51:13,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:51:13,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:51:13,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:51:13,696 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 08:51:13,698 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 08:51:13,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:13,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 08:51:13,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:51:13,822 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:51:13,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:51:13,882 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:51:13,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68131452] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:51:13,883 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:51:13,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-01-31 08:51:13,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959334256] [2022-01-31 08:51:13,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:51:13,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 08:51:13,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:51:13,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 08:51:13,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-01-31 08:51:13,885 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 5 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 08:51:13,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:51:13,978 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2022-01-31 08:51:13,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 08:51:13,978 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 5 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 31 [2022-01-31 08:51:13,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:51:13,979 INFO L225 Difference]: With dead ends: 55 [2022-01-31 08:51:13,979 INFO L226 Difference]: Without dead ends: 45 [2022-01-31 08:51:13,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-01-31 08:51:13,980 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 32 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:51:13,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 49 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:51:13,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-01-31 08:51:13,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2022-01-31 08:51:13,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 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 08:51:13,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2022-01-31 08:51:13,984 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 31 [2022-01-31 08:51:13,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:51:13,984 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2022-01-31 08:51:13,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 5 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 08:51:13,984 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2022-01-31 08:51:13,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 08:51:13,985 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:51:13,985 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:51:14,004 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 08:51:14,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-31 08:51:14,199 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:51:14,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:51:14,199 INFO L85 PathProgramCache]: Analyzing trace with hash -2018354403, now seen corresponding path program 2 times [2022-01-31 08:51:14,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:51:14,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616533756] [2022-01-31 08:51:14,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:51:14,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:51:14,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:14,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:51:14,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:14,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:51:14,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:14,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-01-31 08:51:14,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:14,314 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:51:14,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:51:14,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616533756] [2022-01-31 08:51:14,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616533756] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:51:14,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586099361] [2022-01-31 08:51:14,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:51:14,315 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:51:14,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:51:14,316 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 08:51:14,327 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 08:51:14,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:51:14,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:51:14,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-31 08:51:14,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:51:14,395 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 08:51:16,560 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 23 treesize of output 7 [2022-01-31 08:51:16,598 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:51:16,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:51:16,985 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 16 treesize of output 14 [2022-01-31 08:51:16,987 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 28 treesize of output 24 [2022-01-31 08:51:17,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:51:17,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586099361] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:51:17,019 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:51:17,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 16 [2022-01-31 08:51:17,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492306467] [2022-01-31 08:51:17,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:51:17,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 08:51:17,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:51:17,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 08:51:17,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=198, Unknown=2, NotChecked=0, Total=240 [2022-01-31 08:51:17,021 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 16 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 08:51:19,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:51:19,200 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2022-01-31 08:51:19,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 08:51:19,200 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 34 [2022-01-31 08:51:19,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:51:19,201 INFO L225 Difference]: With dead ends: 65 [2022-01-31 08:51:19,201 INFO L226 Difference]: Without dead ends: 65 [2022-01-31 08:51:19,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 63 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=69, Invalid=348, Unknown=3, NotChecked=0, Total=420 [2022-01-31 08:51:19,202 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 37 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:51:19,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 152 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 313 Invalid, 0 Unknown, 67 Unchecked, 0.1s Time] [2022-01-31 08:51:19,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-01-31 08:51:19,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 49. [2022-01-31 08:51:19,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 38 states have internal predecessors, (41), 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 08:51:19,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2022-01-31 08:51:19,206 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 34 [2022-01-31 08:51:19,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:51:19,207 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2022-01-31 08:51:19,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 08:51:19,207 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2022-01-31 08:51:19,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-31 08:51:19,208 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:51:19,208 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:51:19,224 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 08:51:19,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:51:19,424 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:51:19,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:51:19,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1349196973, now seen corresponding path program 3 times [2022-01-31 08:51:19,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:51:19,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813834249] [2022-01-31 08:51:19,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:51:19,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:51:19,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:19,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:51:19,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:19,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:51:19,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:19,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 08:51:19,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:19,543 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:51:19,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:51:19,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813834249] [2022-01-31 08:51:19,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813834249] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:51:19,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813340004] [2022-01-31 08:51:19,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:51:19,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:51:19,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:51:19,560 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 08:51:19,561 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 08:51:19,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-31 08:51:19,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:51:19,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-31 08:51:19,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:51:19,634 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 08:51:19,658 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-31 08:51:19,658 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 08:51:21,732 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 23 treesize of output 7 [2022-01-31 08:51:21,756 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 08:51:21,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:51:24,153 WARN L838 $PredicateComparison]: unable to prove that (forall ((main_~i~0 Int)) (= (select (store (select |c_#memory_int| c_main_~a~0.base) (+ c_main_~a~0.offset (* main_~i~0 4)) 0) (+ c_main_~a~0.offset 4)) 0)) is different from false [2022-01-31 08:51:24,164 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 23 treesize of output 21 [2022-01-31 08:51:24,166 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 49 treesize of output 45 [2022-01-31 08:51:24,197 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2022-01-31 08:51:24,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813340004] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:51:24,198 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:51:24,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 18 [2022-01-31 08:51:24,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922517072] [2022-01-31 08:51:24,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:51:24,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 08:51:24,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:51:24,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 08:51:24,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=226, Unknown=3, NotChecked=30, Total=306 [2022-01-31 08:51:24,199 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 18 states, 17 states have (on average 2.823529411764706) internal successors, (48), 15 states have internal predecessors, (48), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 08:51:26,591 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| c_main_~a~0.base) (+ (* c_main_~i~0 4) c_main_~a~0.offset)) 0) (<= c_main_~i~0 1) (<= 1 c_main_~i~0) (forall ((main_~i~0 Int)) (= (select (store (select |c_#memory_int| c_main_~a~0.base) (+ c_main_~a~0.offset (* main_~i~0 4)) 0) (+ c_main_~a~0.offset 4)) 0))) is different from false [2022-01-31 08:51:26,939 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_main_~a~0.offset 4))) (and (forall ((main_~i~0 Int)) (= (select (store (select |c_#memory_int| c_main_~a~0.base) (+ c_main_~a~0.offset (* main_~i~0 4)) 0) (+ c_main_~a~0.offset 4)) 0)) (= (select (select |c_#memory_int| c_main_~a~0.base) .cse0) 0) (not (= (+ (* c_main_~i~0 4) c_main_~a~0.offset) .cse0)))) is different from false [2022-01-31 08:51:29,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:51:29,131 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2022-01-31 08:51:29,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 08:51:29,132 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.823529411764706) internal successors, (48), 15 states have internal predecessors, (48), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 37 [2022-01-31 08:51:29,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:51:29,133 INFO L225 Difference]: With dead ends: 84 [2022-01-31 08:51:29,133 INFO L226 Difference]: Without dead ends: 84 [2022-01-31 08:51:29,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 67 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=97, Invalid=508, Unknown=7, NotChecked=144, Total=756 [2022-01-31 08:51:29,134 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 37 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:51:29,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 168 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 334 Invalid, 0 Unknown, 104 Unchecked, 0.1s Time] [2022-01-31 08:51:29,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-01-31 08:51:29,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 53. [2022-01-31 08:51:29,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 41 states have (on average 1.170731707317073) internal successors, (48), 42 states have internal predecessors, (48), 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 08:51:29,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2022-01-31 08:51:29,139 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 37 [2022-01-31 08:51:29,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:51:29,139 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2022-01-31 08:51:29,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.823529411764706) internal successors, (48), 15 states have internal predecessors, (48), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 08:51:29,139 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2022-01-31 08:51:29,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-31 08:51:29,140 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:51:29,140 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:51:29,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 08:51:29,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:51:29,356 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:51:29,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:51:29,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1592460626, now seen corresponding path program 1 times [2022-01-31 08:51:29,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:51:29,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282752787] [2022-01-31 08:51:29,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:51:29,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:51:29,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:29,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:51:29,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:29,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:51:29,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:29,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 08:51:29,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:29,415 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 08:51:29,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:51:29,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282752787] [2022-01-31 08:51:29,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282752787] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:51:29,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019946577] [2022-01-31 08:51:29,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:51:29,416 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:51:29,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:51:29,432 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 08:51:29,472 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 08:51:29,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:29,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 08:51:29,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:51:29,557 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 08:51:29,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:51:29,640 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 08:51:29,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019946577] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:51:29,641 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:51:29,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-01-31 08:51:29,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965727829] [2022-01-31 08:51:29,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:51:29,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 08:51:29,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:51:29,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 08:51:29,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-01-31 08:51:29,643 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:51:29,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:51:29,738 INFO L93 Difference]: Finished difference Result 81 states and 91 transitions. [2022-01-31 08:51:29,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 08:51:29,739 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 37 [2022-01-31 08:51:29,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:51:29,741 INFO L225 Difference]: With dead ends: 81 [2022-01-31 08:51:29,741 INFO L226 Difference]: Without dead ends: 81 [2022-01-31 08:51:29,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-01-31 08:51:29,742 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 46 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:51:29,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 54 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:51:29,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-01-31 08:51:29,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 58. [2022-01-31 08:51:29,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 47 states have internal predecessors, (53), 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 08:51:29,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2022-01-31 08:51:29,757 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 37 [2022-01-31 08:51:29,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:51:29,757 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2022-01-31 08:51:29,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:51:29,757 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2022-01-31 08:51:29,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 08:51:29,761 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:51:29,762 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:51:29,778 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-31 08:51:29,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:51:29,978 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:51:29,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:51:29,978 INFO L85 PathProgramCache]: Analyzing trace with hash -738410031, now seen corresponding path program 4 times [2022-01-31 08:51:29,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:51:29,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135029454] [2022-01-31 08:51:29,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:51:29,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:51:29,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:30,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:51:30,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:30,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:51:30,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:30,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-01-31 08:51:30,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:30,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-01-31 08:51:30,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:30,055 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 08:51:30,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:51:30,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135029454] [2022-01-31 08:51:30,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135029454] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:51:30,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649965111] [2022-01-31 08:51:30,055 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 08:51:30,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:51:30,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:51:30,056 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 08:51:30,104 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 08:51:30,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 08:51:30,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:51:30,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 08:51:30,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:51:30,248 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 08:51:30,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:51:30,326 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 08:51:30,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649965111] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:51:30,326 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:51:30,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2022-01-31 08:51:30,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748767551] [2022-01-31 08:51:30,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:51:30,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 08:51:30,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:51:30,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 08:51:30,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-01-31 08:51:30,327 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 7 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-01-31 08:51:30,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:51:30,459 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2022-01-31 08:51:30,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 08:51:30,459 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 7 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 42 [2022-01-31 08:51:30,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:51:30,459 INFO L225 Difference]: With dead ends: 82 [2022-01-31 08:51:30,460 INFO L226 Difference]: Without dead ends: 64 [2022-01-31 08:51:30,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2022-01-31 08:51:30,460 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 40 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:51:30,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 75 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:51:30,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-01-31 08:51:30,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2022-01-31 08:51:30,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 47 states have internal predecessors, (52), 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 08:51:30,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2022-01-31 08:51:30,463 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 42 [2022-01-31 08:51:30,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:51:30,463 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2022-01-31 08:51:30,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 7 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-01-31 08:51:30,463 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2022-01-31 08:51:30,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-31 08:51:30,464 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:51:30,464 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:51:30,480 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 08:51:30,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:51:30,664 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:51:30,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:51:30,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1689865209, now seen corresponding path program 5 times [2022-01-31 08:51:30,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:51:30,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752774013] [2022-01-31 08:51:30,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:51:30,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:51:30,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:30,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:51:30,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:30,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:51:30,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:30,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 08:51:30,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:30,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-31 08:51:30,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:30,848 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 08:51:30,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:51:30,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752774013] [2022-01-31 08:51:30,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752774013] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:51:30,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548835595] [2022-01-31 08:51:30,848 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 08:51:30,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:51:30,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:51:30,849 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 08:51:30,850 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 08:51:30,892 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-31 08:51:30,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:51:30,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-31 08:51:30,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:51:30,954 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 08:51:31,144 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 08:51:31,168 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 08:51:31,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:51:35,639 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 16 treesize of output 14 [2022-01-31 08:51:35,640 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 28 treesize of output 24 [2022-01-31 08:51:35,680 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 08:51:35,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548835595] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:51:35,681 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:51:35,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 26 [2022-01-31 08:51:35,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68772450] [2022-01-31 08:51:35,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:51:35,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 08:51:35,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:51:35,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 08:51:35,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=557, Unknown=3, NotChecked=0, Total=650 [2022-01-31 08:51:35,682 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand has 26 states, 25 states have (on average 2.6) internal successors, (65), 23 states have internal predecessors, (65), 8 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-01-31 08:51:35,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:51:35,971 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2022-01-31 08:51:35,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 08:51:35,971 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.6) internal successors, (65), 23 states have internal predecessors, (65), 8 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 45 [2022-01-31 08:51:35,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:51:35,972 INFO L225 Difference]: With dead ends: 69 [2022-01-31 08:51:35,972 INFO L226 Difference]: Without dead ends: 69 [2022-01-31 08:51:35,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 80 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=143, Invalid=976, Unknown=3, NotChecked=0, Total=1122 [2022-01-31 08:51:35,973 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 53 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:51:35,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 201 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 505 Invalid, 0 Unknown, 38 Unchecked, 0.2s Time] [2022-01-31 08:51:35,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-01-31 08:51:35,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2022-01-31 08:51:35,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 53 states have internal predecessors, (58), 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 08:51:35,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2022-01-31 08:51:35,976 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 45 [2022-01-31 08:51:35,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:51:35,976 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2022-01-31 08:51:35,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.6) internal successors, (65), 23 states have internal predecessors, (65), 8 states have call successors, (12), 5 states have call predecessors, (12), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-01-31 08:51:35,976 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2022-01-31 08:51:35,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-31 08:51:35,976 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:51:35,976 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:51:35,996 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 08:51:36,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:51:36,188 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:51:36,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:51:36,188 INFO L85 PathProgramCache]: Analyzing trace with hash 541495483, now seen corresponding path program 6 times [2022-01-31 08:51:36,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:51:36,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34083229] [2022-01-31 08:51:36,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:51:36,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:51:36,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:36,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:51:36,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:36,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:51:36,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:36,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-31 08:51:36,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:36,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-31 08:51:36,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:36,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-31 08:51:36,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:36,276 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 08:51:36,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:51:36,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34083229] [2022-01-31 08:51:36,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34083229] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:51:36,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862955117] [2022-01-31 08:51:36,277 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 08:51:36,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:51:36,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:51:36,278 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 08:51:36,279 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 08:51:36,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-31 08:51:36,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:51:36,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-31 08:51:36,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:51:36,496 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 08:51:36,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:51:36,578 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 08:51:36,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862955117] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:51:36,579 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:51:36,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 18 [2022-01-31 08:51:36,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314582802] [2022-01-31 08:51:36,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:51:36,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 08:51:36,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:51:36,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 08:51:36,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-01-31 08:51:36,580 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 17 states have internal predecessors, (58), 9 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-01-31 08:51:36,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:51:36,711 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2022-01-31 08:51:36,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 08:51:36,712 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 17 states have internal predecessors, (58), 9 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 53 [2022-01-31 08:51:36,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:51:36,712 INFO L225 Difference]: With dead ends: 98 [2022-01-31 08:51:36,712 INFO L226 Difference]: Without dead ends: 72 [2022-01-31 08:51:36,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2022-01-31 08:51:36,713 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 60 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:51:36,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 73 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:51:36,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-01-31 08:51:36,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2022-01-31 08:51:36,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 52 states have (on average 1.0961538461538463) internal successors, (57), 53 states have internal predecessors, (57), 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 08:51:36,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2022-01-31 08:51:36,716 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 53 [2022-01-31 08:51:36,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:51:36,716 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2022-01-31 08:51:36,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 17 states have internal predecessors, (58), 9 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-01-31 08:51:36,717 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2022-01-31 08:51:36,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 08:51:36,717 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:51:36,717 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:51:36,733 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-01-31 08:51:36,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-31 08:51:36,927 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:51:36,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:51:36,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1356185403, now seen corresponding path program 7 times [2022-01-31 08:51:36,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:51:36,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620619402] [2022-01-31 08:51:36,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:51:36,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:51:36,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:37,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:51:37,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:37,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:51:37,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:37,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-01-31 08:51:37,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:37,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 08:51:37,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:37,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 08:51:37,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:37,141 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 6 proven. 40 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 08:51:37,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:51:37,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620619402] [2022-01-31 08:51:37,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620619402] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:51:37,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081238806] [2022-01-31 08:51:37,141 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 08:51:37,141 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:51:37,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:51:37,142 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 08:51:37,143 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 08:51:37,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:37,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-31 08:51:37,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:51:37,257 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 08:51:37,532 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 08:51:37,560 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 08:51:37,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:51:43,994 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 16 treesize of output 14 [2022-01-31 08:51:43,997 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 28 treesize of output 24 [2022-01-31 08:51:44,077 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 6 proven. 40 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 08:51:44,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081238806] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:51:44,078 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:51:44,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 31 [2022-01-31 08:51:44,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583369960] [2022-01-31 08:51:44,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:51:44,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 08:51:44,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:51:44,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 08:51:44,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=814, Unknown=4, NotChecked=0, Total=930 [2022-01-31 08:51:44,079 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 31 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 28 states have internal predecessors, (80), 11 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-01-31 08:51:44,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:51:44,550 INFO L93 Difference]: Finished difference Result 106 states and 111 transitions. [2022-01-31 08:51:44,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 08:51:44,550 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 28 states have internal predecessors, (80), 11 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 56 [2022-01-31 08:51:44,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:51:44,551 INFO L225 Difference]: With dead ends: 106 [2022-01-31 08:51:44,551 INFO L226 Difference]: Without dead ends: 106 [2022-01-31 08:51:44,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 98 SyntacticMatches, 9 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=163, Invalid=1315, Unknown=4, NotChecked=0, Total=1482 [2022-01-31 08:51:44,552 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 58 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 08:51:44,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 290 Invalid, 946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 810 Invalid, 0 Unknown, 104 Unchecked, 0.3s Time] [2022-01-31 08:51:44,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-01-31 08:51:44,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 75. [2022-01-31 08:51:44,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 60 states have internal predecessors, (64), 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 08:51:44,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2022-01-31 08:51:44,573 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 56 [2022-01-31 08:51:44,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:51:44,573 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2022-01-31 08:51:44,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 28 states have internal predecessors, (80), 11 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-01-31 08:51:44,573 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2022-01-31 08:51:44,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 08:51:44,574 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:51:44,574 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:51:44,593 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-01-31 08:51:44,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:51:44,774 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:51:44,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:51:44,775 INFO L85 PathProgramCache]: Analyzing trace with hash -512942981, now seen corresponding path program 8 times [2022-01-31 08:51:44,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:51:44,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090078795] [2022-01-31 08:51:44,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:51:44,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:51:44,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:45,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:51:45,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:45,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:51:45,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:45,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-31 08:51:45,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:45,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 08:51:45,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:45,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-31 08:51:45,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:51:45,076 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 6 proven. 53 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 08:51:45,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:51:45,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090078795] [2022-01-31 08:51:45,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090078795] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:51:45,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21383446] [2022-01-31 08:51:45,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:51:45,076 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:51:45,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:51:45,077 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 08:51:45,079 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 08:51:45,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:51:45,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:51:45,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-31 08:51:45,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:51:45,197 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 08:51:45,244 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-31 08:51:45,245 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 08:51:51,542 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 08:51:51,589 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 08:51:51,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:52:01,786 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_110 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_110)) (forall ((v_ArrVal_167 Int)) (= 0 (select (store (select |c_#memory_int| c_main_~a~0.base) (+ (* 4 v_main_~i~0_110) c_main_~a~0.offset) v_ArrVal_167) (+ c_main_~a~0.offset 12)))))) is different from false [2022-01-31 08:52:01,795 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 23 treesize of output 21 [2022-01-31 08:52:01,798 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 178 treesize of output 170 [2022-01-31 08:52:01,895 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 6 proven. 49 refuted. 0 times theorem prover too weak. 12 trivial. 4 not checked. [2022-01-31 08:52:01,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21383446] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:52:01,896 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:52:01,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 36 [2022-01-31 08:52:01,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49791678] [2022-01-31 08:52:01,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:52:01,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 08:52:01,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:52:01,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 08:52:01,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1046, Unknown=6, NotChecked=66, Total=1260 [2022-01-31 08:52:01,897 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand has 36 states, 35 states have (on average 2.5714285714285716) internal successors, (90), 33 states have internal predecessors, (90), 11 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-01-31 08:52:04,034 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| c_main_~a~0.base) (+ (* c_main_~i~0 4) c_main_~a~0.offset)) 0) (forall ((v_main_~i~0_110 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_110)) (forall ((v_ArrVal_167 Int)) (= 0 (select (store (select |c_#memory_int| c_main_~a~0.base) (+ (* 4 v_main_~i~0_110) c_main_~a~0.offset) v_ArrVal_167) (+ c_main_~a~0.offset 12)))))) (<= c_main_~i~0 3) (= c_main_~a~0.offset 0) (<= 3 c_main_~i~0)) is different from false [2022-01-31 08:52:04,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:52:04,270 INFO L93 Difference]: Finished difference Result 124 states and 130 transitions. [2022-01-31 08:52:04,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 08:52:04,271 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.5714285714285716) internal successors, (90), 33 states have internal predecessors, (90), 11 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 59 [2022-01-31 08:52:04,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:52:04,273 INFO L225 Difference]: With dead ends: 124 [2022-01-31 08:52:04,273 INFO L226 Difference]: Without dead ends: 124 [2022-01-31 08:52:04,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 102 SyntacticMatches, 10 SemanticMatches, 44 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=208, Invalid=1685, Unknown=7, NotChecked=170, Total=2070 [2022-01-31 08:52:04,274 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 77 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:52:04,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 225 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 511 Invalid, 0 Unknown, 138 Unchecked, 0.2s Time] [2022-01-31 08:52:04,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-01-31 08:52:04,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 96. [2022-01-31 08:52:04,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 74 states have (on average 1.0675675675675675) internal successors, (79), 77 states have internal predecessors, (79), 12 states have call successors, (12), 10 states have call predecessors, (12), 9 states have return successors, (11), 8 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-31 08:52:04,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 102 transitions. [2022-01-31 08:52:04,286 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 102 transitions. Word has length 59 [2022-01-31 08:52:04,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:52:04,287 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 102 transitions. [2022-01-31 08:52:04,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.5714285714285716) internal successors, (90), 33 states have internal predecessors, (90), 11 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-01-31 08:52:04,287 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 102 transitions. [2022-01-31 08:52:04,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 08:52:04,288 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:52:04,288 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:52:04,305 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 08:52:04,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-31 08:52:04,508 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:52:04,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:52:04,508 INFO L85 PathProgramCache]: Analyzing trace with hash -741663483, now seen corresponding path program 9 times [2022-01-31 08:52:04,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:52:04,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457444530] [2022-01-31 08:52:04,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:52:04,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:52:04,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:52:04,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:52:04,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:52:04,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:52:04,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:52:04,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 08:52:04,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:52:04,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 08:52:04,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:52:04,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 08:52:04,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:52:04,773 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 6 proven. 69 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 08:52:04,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:52:04,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457444530] [2022-01-31 08:52:04,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457444530] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:52:04,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716473843] [2022-01-31 08:52:04,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:52:04,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:52:04,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:52:04,796 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 08:52:04,797 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 08:52:04,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-31 08:52:04,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:52:04,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-31 08:52:04,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:52:05,009 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 08:52:05,060 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-31 08:52:05,061 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 08:52:05,098 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-31 08:52:05,098 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 08:52:11,446 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 19 treesize of output 7 [2022-01-31 08:52:11,474 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 2 proven. 73 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 08:52:11,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:52:20,054 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_128 Int)) (or (forall ((v_ArrVal_201 Int)) (= (select (store (select |c_#memory_int| c_main_~a~0.base) (+ (* 4 v_main_~i~0_128) c_main_~a~0.offset) v_ArrVal_201) (+ c_main_~a~0.offset 12)) 0)) (not (<= (+ c_main_~i~0 1) v_main_~i~0_128)))) is different from false [2022-01-31 08:52:28,305 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~i~0_129 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_129)) (forall ((v_ArrVal_201 Int) (v_ArrVal_200 Int) (v_main_~i~0_128 Int)) (or (not (<= (+ v_main_~i~0_129 1) v_main_~i~0_128)) (= (select (store (store (select |c_#memory_int| c_main_~a~0.base) (+ c_main_~a~0.offset (* 4 v_main_~i~0_129)) v_ArrVal_200) (+ (* 4 v_main_~i~0_128) c_main_~a~0.offset) v_ArrVal_201) (+ c_main_~a~0.offset 12)) 0))))) is different from false [2022-01-31 08:52:28,322 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 30 treesize of output 28 [2022-01-31 08:52:28,338 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 778 treesize of output 762 [2022-01-31 08:52:28,672 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 6 proven. 52 refuted. 8 times theorem prover too weak. 12 trivial. 9 not checked. [2022-01-31 08:52:28,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716473843] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:52:28,673 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:52:28,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 18] total 40 [2022-01-31 08:52:28,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788221664] [2022-01-31 08:52:28,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:52:28,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 08:52:28,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:52:28,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 08:52:28,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1224, Unknown=24, NotChecked=146, Total=1560 [2022-01-31 08:52:28,674 INFO L87 Difference]: Start difference. First operand 96 states and 102 transitions. Second operand has 40 states, 39 states have (on average 2.5384615384615383) internal successors, (99), 37 states have internal predecessors, (99), 11 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-01-31 08:52:30,818 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* c_main_~i~0 4) c_main_~a~0.offset))) (and (= (select (select |c_#memory_int| c_main_~a~0.base) .cse0) 0) (= .cse0 12) (= c_main_~a~0.offset 0) (forall ((v_main_~i~0_129 Int)) (or (not (<= (+ c_main_~i~0 1) v_main_~i~0_129)) (forall ((v_ArrVal_201 Int) (v_ArrVal_200 Int) (v_main_~i~0_128 Int)) (or (not (<= (+ v_main_~i~0_129 1) v_main_~i~0_128)) (= (select (store (store (select |c_#memory_int| c_main_~a~0.base) (+ c_main_~a~0.offset (* 4 v_main_~i~0_129)) v_ArrVal_200) (+ (* 4 v_main_~i~0_128) c_main_~a~0.offset) v_ArrVal_201) (+ c_main_~a~0.offset 12)) 0))))))) is different from false [2022-01-31 08:52:32,842 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| c_main_~a~0.base))) (and (forall ((v_main_~i~0_128 Int)) (or (forall ((v_ArrVal_201 Int)) (= (select (store (select |c_#memory_int| c_main_~a~0.base) (+ (* 4 v_main_~i~0_128) c_main_~a~0.offset) v_ArrVal_201) (+ c_main_~a~0.offset 12)) 0)) (not (<= (+ c_main_~i~0 1) v_main_~i~0_128)))) (= (select .cse0 (+ (* c_main_~i~0 4) c_main_~a~0.offset)) 0) (= c_main_~a~0.offset 0) (= (select .cse0 12) 0) (<= (+ (div (+ (* (- 1) c_main_~a~0.offset) 12) 4) 1) c_main_~i~0))) is different from false [2022-01-31 08:52:33,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:52:33,107 INFO L93 Difference]: Finished difference Result 123 states and 131 transitions. [2022-01-31 08:52:33,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 08:52:33,107 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.5384615384615383) internal successors, (99), 37 states have internal predecessors, (99), 11 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 62 [2022-01-31 08:52:33,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:52:33,108 INFO L225 Difference]: With dead ends: 123 [2022-01-31 08:52:33,108 INFO L226 Difference]: Without dead ends: 123 [2022-01-31 08:52:33,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 103 SyntacticMatches, 11 SemanticMatches, 49 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 27.3s TimeCoverageRelationStatistics Valid=236, Invalid=1916, Unknown=26, NotChecked=372, Total=2550 [2022-01-31 08:52:33,109 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 74 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 1057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 195 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 08:52:33,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 289 Invalid, 1057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 825 Invalid, 0 Unknown, 195 Unchecked, 0.3s Time] [2022-01-31 08:52:33,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-01-31 08:52:33,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 108. [2022-01-31 08:52:33,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 83 states have (on average 1.0602409638554218) internal successors, (88), 86 states have internal predecessors, (88), 14 states have call successors, (14), 11 states have call predecessors, (14), 10 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-31 08:52:33,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 115 transitions. [2022-01-31 08:52:33,112 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 115 transitions. Word has length 62 [2022-01-31 08:52:33,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:52:33,112 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 115 transitions. [2022-01-31 08:52:33,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.5384615384615383) internal successors, (99), 37 states have internal predecessors, (99), 11 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-01-31 08:52:33,113 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 115 transitions. [2022-01-31 08:52:33,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 08:52:33,113 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:52:33,123 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:52:33,130 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-01-31 08:52:33,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-31 08:52:33,324 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:52:33,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:52:33,325 INFO L85 PathProgramCache]: Analyzing trace with hash 413695865, now seen corresponding path program 10 times [2022-01-31 08:52:33,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:52:33,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105924104] [2022-01-31 08:52:33,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:52:33,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:52:33,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:52:33,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:52:33,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:52:33,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:52:33,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:52:33,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-01-31 08:52:33,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:52:33,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 08:52:33,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:52:33,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 08:52:33,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:52:33,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 08:52:33,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:52:33,444 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 27 proven. 35 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 08:52:33,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:52:33,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105924104] [2022-01-31 08:52:33,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105924104] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:52:33,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958931166] [2022-01-31 08:52:33,445 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 08:52:33,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:52:33,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:52:33,446 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 08:52:33,447 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 08:52:33,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 08:52:33,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:52:33,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 08:52:33,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:52:33,710 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 40 proven. 22 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 08:52:33,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:52:33,808 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 40 proven. 22 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 08:52:33,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958931166] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:52:33,808 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:52:33,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 21 [2022-01-31 08:52:33,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586709726] [2022-01-31 08:52:33,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:52:33,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 08:52:33,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:52:33,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 08:52:33,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2022-01-31 08:52:33,809 INFO L87 Difference]: Start difference. First operand 108 states and 115 transitions. Second operand has 21 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 20 states have internal predecessors, (67), 11 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-01-31 08:52:34,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:52:34,019 INFO L93 Difference]: Finished difference Result 133 states and 138 transitions. [2022-01-31 08:52:34,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 08:52:34,020 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 20 states have internal predecessors, (67), 11 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 64 [2022-01-31 08:52:34,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:52:34,021 INFO L225 Difference]: With dead ends: 133 [2022-01-31 08:52:34,021 INFO L226 Difference]: Without dead ends: 99 [2022-01-31 08:52:34,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=535, Unknown=0, NotChecked=0, Total=702 [2022-01-31 08:52:34,021 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 60 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:52:34,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 130 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 08:52:34,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-01-31 08:52:34,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 93. [2022-01-31 08:52:34,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 74 states have internal predecessors, (76), 11 states have call successors, (11), 10 states have call predecessors, (11), 9 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 08:52:34,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2022-01-31 08:52:34,024 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 64 [2022-01-31 08:52:34,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:52:34,024 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2022-01-31 08:52:34,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 20 states have internal predecessors, (67), 11 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-01-31 08:52:34,024 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2022-01-31 08:52:34,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-31 08:52:34,025 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:52:34,025 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:52:34,042 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-01-31 08:52:34,225 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,SelfDestructingSolverStorable13 [2022-01-31 08:52:34,225 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:52:34,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:52:34,226 INFO L85 PathProgramCache]: Analyzing trace with hash -595114705, now seen corresponding path program 11 times [2022-01-31 08:52:34,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:52:34,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126531657] [2022-01-31 08:52:34,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:52:34,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:52:34,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:52:34,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:52:34,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:52:34,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:52:34,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:52:34,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-31 08:52:34,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:52:34,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 08:52:34,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:52:34,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-31 08:52:34,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:52:34,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-01-31 08:52:34,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:52:34,401 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 8 proven. 67 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 08:52:34,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:52:34,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126531657] [2022-01-31 08:52:34,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126531657] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:52:34,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958973520] [2022-01-31 08:52:34,402 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 08:52:34,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:52:34,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:52:34,403 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 08:52:34,404 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 08:52:34,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-31 08:52:34,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:52:34,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-31 08:52:34,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:52:34,522 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 08:53:06,838 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 23 treesize of output 7 [2022-01-31 08:53:06,869 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 08:53:06,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:53:08,987 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 16 treesize of output 14 [2022-01-31 08:53:08,989 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 28 treesize of output 24 [2022-01-31 08:53:09,075 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 8 proven. 67 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 08:53:09,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958973520] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:53:09,075 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:53:09,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 16] total 25 [2022-01-31 08:53:09,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335481937] [2022-01-31 08:53:09,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:53:09,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 08:53:09,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:53:09,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 08:53:09,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=525, Unknown=5, NotChecked=0, Total=600 [2022-01-31 08:53:09,077 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand has 25 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 22 states have internal predecessors, (67), 10 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-01-31 08:53:17,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:53:17,512 INFO L93 Difference]: Finished difference Result 122 states and 126 transitions. [2022-01-31 08:53:17,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 08:53:17,513 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 22 states have internal predecessors, (67), 10 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 67 [2022-01-31 08:53:17,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:53:17,513 INFO L225 Difference]: With dead ends: 122 [2022-01-31 08:53:17,513 INFO L226 Difference]: Without dead ends: 122 [2022-01-31 08:53:17,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 126 SyntacticMatches, 13 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 42.5s TimeCoverageRelationStatistics Valid=116, Invalid=997, Unknown=9, NotChecked=0, Total=1122 [2022-01-31 08:53:17,514 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 61 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 878 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 1007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 08:53:17,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 301 Invalid, 1007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 878 Invalid, 0 Unknown, 95 Unchecked, 0.3s Time] [2022-01-31 08:53:17,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-01-31 08:53:17,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 83. [2022-01-31 08:53:17,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 66 states have internal predecessors, (69), 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 08:53:17,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2022-01-31 08:53:17,517 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 67 [2022-01-31 08:53:17,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:53:17,517 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2022-01-31 08:53:17,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 22 states have internal predecessors, (67), 10 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-01-31 08:53:17,517 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2022-01-31 08:53:17,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 08:53:17,517 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:53:17,517 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:53:17,534 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 08:53:17,720 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,SelfDestructingSolverStorable14 [2022-01-31 08:53:17,720 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:53:17,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:53:17,721 INFO L85 PathProgramCache]: Analyzing trace with hash 2110331833, now seen corresponding path program 12 times [2022-01-31 08:53:17,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:53:17,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107945421] [2022-01-31 08:53:17,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:53:17,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:53:17,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:53:17,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:53:17,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:53:17,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:53:17,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:53:17,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 08:53:17,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:53:17,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 08:53:17,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:53:17,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 08:53:17,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:53:17,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 08:53:17,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:53:17,912 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 8 proven. 83 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 08:53:17,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:53:17,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107945421] [2022-01-31 08:53:17,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107945421] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:53:17,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323489059] [2022-01-31 08:53:17,912 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 08:53:17,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:53:17,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:53:17,913 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 08:53:17,914 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 08:53:17,977 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-01-31 08:53:17,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:53:17,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-31 08:53:17,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:53:18,037 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 08:53:18,062 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-31 08:53:18,062 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 08:53:50,381 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 23 treesize of output 7 [2022-01-31 08:53:50,412 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-31 08:53:50,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:53:52,880 WARN L838 $PredicateComparison]: unable to prove that (forall ((main_~i~0 Int)) (= (select (store (select |c_#memory_int| c_main_~a~0.base) (+ c_main_~a~0.offset (* main_~i~0 4)) 0) (+ c_main_~a~0.offset 16)) 0)) is different from false [2022-01-31 08:53:52,894 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 23 treesize of output 21 [2022-01-31 08:53:52,901 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 49 treesize of output 45 [2022-01-31 08:53:52,956 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 8 proven. 67 refuted. 0 times theorem prover too weak. 24 trivial. 16 not checked. [2022-01-31 08:53:52,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323489059] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:53:52,956 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:53:52,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 27 [2022-01-31 08:53:52,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036685966] [2022-01-31 08:53:52,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:53:52,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 08:53:52,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:53:52,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 08:53:52,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=568, Unknown=6, NotChecked=48, Total=702 [2022-01-31 08:53:52,958 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand has 27 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 24 states have internal predecessors, (75), 10 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-01-31 08:54:01,504 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| c_main_~a~0.base) (+ (* c_main_~i~0 4) c_main_~a~0.offset)) 0) (<= c_main_~i~0 4) (<= 4 c_main_~i~0) (forall ((main_~i~0 Int)) (= (select (store (select |c_#memory_int| c_main_~a~0.base) (+ c_main_~a~0.offset (* main_~i~0 4)) 0) (+ c_main_~a~0.offset 16)) 0))) is different from false [2022-01-31 08:54:01,870 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_main_~a~0.offset 16))) (and (forall ((main_~i~0 Int)) (= (select (store (select |c_#memory_int| c_main_~a~0.base) (+ c_main_~a~0.offset (* main_~i~0 4)) 0) (+ c_main_~a~0.offset 16)) 0)) (not (= (+ (* c_main_~i~0 4) c_main_~a~0.offset) .cse0)) (= (select (select |c_#memory_int| c_main_~a~0.base) .cse0) 0))) is different from false [2022-01-31 08:54:02,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:54:02,173 INFO L93 Difference]: Finished difference Result 152 states and 161 transitions. [2022-01-31 08:54:02,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 08:54:02,174 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 24 states have internal predecessors, (75), 10 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 70 [2022-01-31 08:54:02,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:54:02,175 INFO L225 Difference]: With dead ends: 152 [2022-01-31 08:54:02,175 INFO L226 Difference]: Without dead ends: 152 [2022-01-31 08:54:02,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 131 SyntacticMatches, 14 SemanticMatches, 36 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 43.6s TimeCoverageRelationStatistics Valid=132, Invalid=1058, Unknown=12, NotChecked=204, Total=1406 [2022-01-31 08:54:02,176 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 74 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 1023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 08:54:02,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 303 Invalid, 1023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 807 Invalid, 0 Unknown, 183 Unchecked, 0.4s Time] [2022-01-31 08:54:02,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-01-31 08:54:02,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 119. [2022-01-31 08:54:02,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 92 states have (on average 1.065217391304348) internal successors, (98), 95 states have internal predecessors, (98), 15 states have call successors, (15), 12 states have call predecessors, (15), 11 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2022-01-31 08:54:02,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 127 transitions. [2022-01-31 08:54:02,180 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 127 transitions. Word has length 70 [2022-01-31 08:54:02,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:54:02,181 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 127 transitions. [2022-01-31 08:54:02,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 24 states have internal predecessors, (75), 10 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-01-31 08:54:02,181 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 127 transitions. [2022-01-31 08:54:02,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 08:54:02,182 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:54:02,182 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:54:02,198 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 08:54:02,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:54:02,383 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:54:02,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:54:02,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1647438354, now seen corresponding path program 2 times [2022-01-31 08:54:02,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:54:02,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448016620] [2022-01-31 08:54:02,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:54:02,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:54:02,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:54:02,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:54:02,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:54:02,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:54:02,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:54:02,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-31 08:54:02,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:54:02,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-31 08:54:02,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:54:02,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-31 08:54:02,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:54:02,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-01-31 08:54:02,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:54:02,502 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 21 proven. 57 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-01-31 08:54:02,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:54:02,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448016620] [2022-01-31 08:54:02,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448016620] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:54:02,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002960133] [2022-01-31 08:54:02,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:54:02,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:54:02,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:54:02,504 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 08:54:02,505 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 08:54:02,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:54:02,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:54:02,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 08:54:02,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:54:02,669 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-01-31 08:54:02,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:54:02,894 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 21 proven. 57 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-01-31 08:54:02,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002960133] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:54:02,895 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:54:02,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-01-31 08:54:02,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629348106] [2022-01-31 08:54:02,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:54:02,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 08:54:02,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:54:02,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 08:54:02,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-01-31 08:54:02,896 INFO L87 Difference]: Start difference. First operand 119 states and 127 transitions. Second operand has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 17 states have internal predecessors, (68), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:54:03,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:54:03,090 INFO L93 Difference]: Finished difference Result 202 states and 230 transitions. [2022-01-31 08:54:03,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 08:54:03,090 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 17 states have internal predecessors, (68), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 73 [2022-01-31 08:54:03,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:54:03,091 INFO L225 Difference]: With dead ends: 202 [2022-01-31 08:54:03,092 INFO L226 Difference]: Without dead ends: 202 [2022-01-31 08:54:03,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-01-31 08:54:03,092 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 111 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:54:03,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 69 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 08:54:03,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-01-31 08:54:03,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 143. [2022-01-31 08:54:03,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 116 states have (on average 1.1206896551724137) internal successors, (130), 119 states have internal predecessors, (130), 15 states have call successors, (15), 12 states have call predecessors, (15), 11 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2022-01-31 08:54:03,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 159 transitions. [2022-01-31 08:54:03,099 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 159 transitions. Word has length 73 [2022-01-31 08:54:03,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:54:03,099 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 159 transitions. [2022-01-31 08:54:03,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 17 states have internal predecessors, (68), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 08:54:03,099 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 159 transitions. [2022-01-31 08:54:03,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 08:54:03,100 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:54:03,100 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:54:03,116 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 08:54:03,300 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,SelfDestructingSolverStorable16 [2022-01-31 08:54:03,300 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:54:03,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:54:03,301 INFO L85 PathProgramCache]: Analyzing trace with hash 253196771, now seen corresponding path program 13 times [2022-01-31 08:54:03,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:54:03,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692768941] [2022-01-31 08:54:03,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:54:03,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:54:03,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:54:03,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:54:03,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:54:03,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:54:03,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:54:03,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-31 08:54:03,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:54:03,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 08:54:03,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:54:03,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-31 08:54:03,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:54:03,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-01-31 08:54:03,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:54:03,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-01-31 08:54:03,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:54:03,437 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 43 proven. 52 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 08:54:03,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:54:03,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692768941] [2022-01-31 08:54:03,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692768941] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:54:03,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902914834] [2022-01-31 08:54:03,438 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 08:54:03,438 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:54:03,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:54:03,439 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 08:54:03,440 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 08:54:03,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:54:03,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 08:54:03,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:54:03,722 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 60 proven. 35 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 08:54:03,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:54:03,875 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 60 proven. 35 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 08:54:03,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902914834] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:54:03,875 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:54:03,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 24 [2022-01-31 08:54:03,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152653467] [2022-01-31 08:54:03,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:54:03,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 08:54:03,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:54:03,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 08:54:03,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2022-01-31 08:54:03,878 INFO L87 Difference]: Start difference. First operand 143 states and 159 transitions. Second operand has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 23 states have internal predecessors, (76), 13 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2022-01-31 08:54:04,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:54:04,120 INFO L93 Difference]: Finished difference Result 184 states and 200 transitions. [2022-01-31 08:54:04,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 08:54:04,120 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 23 states have internal predecessors, (76), 13 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) Word has length 75 [2022-01-31 08:54:04,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:54:04,121 INFO L225 Difference]: With dead ends: 184 [2022-01-31 08:54:04,121 INFO L226 Difference]: Without dead ends: 142 [2022-01-31 08:54:04,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 155 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=712, Unknown=0, NotChecked=0, Total=930 [2022-01-31 08:54:04,122 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 76 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:54:04,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 110 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 08:54:04,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-01-31 08:54:04,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 110. [2022-01-31 08:54:04,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 92 states have (on average 1.141304347826087) internal successors, (105), 93 states have internal predecessors, (105), 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 08:54:04,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 122 transitions. [2022-01-31 08:54:04,126 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 122 transitions. Word has length 75 [2022-01-31 08:54:04,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:54:04,126 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 122 transitions. [2022-01-31 08:54:04,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 23 states have internal predecessors, (76), 13 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2022-01-31 08:54:04,126 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 122 transitions. [2022-01-31 08:54:04,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 08:54:04,127 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:54:04,127 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:54:04,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-31 08:54:04,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-31 08:54:04,342 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:54:04,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:54:04,342 INFO L85 PathProgramCache]: Analyzing trace with hash 17245805, now seen corresponding path program 14 times [2022-01-31 08:54:04,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:54:04,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644334481] [2022-01-31 08:54:04,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:54:04,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:54:04,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:54:04,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:54:04,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:54:04,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:54:04,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:54:04,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 08:54:04,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:54:04,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 08:54:04,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:54:04,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 08:54:04,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:54:04,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 08:54:04,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:54:04,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 08:54:04,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:54:04,569 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 10 proven. 101 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 08:54:04,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:54:04,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644334481] [2022-01-31 08:54:04,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644334481] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:54:04,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990365327] [2022-01-31 08:54:04,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:54:04,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:54:04,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:54:04,570 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 08:54:04,571 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 08:54:04,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:54:04,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:54:04,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-31 08:54:04,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:54:04,690 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 08:54:49,230 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 23 treesize of output 7 [2022-01-31 08:54:49,264 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 08:54:49,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:54:51,372 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 16 treesize of output 14 [2022-01-31 08:54:51,374 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 28 treesize of output 24 [2022-01-31 08:54:51,441 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 10 proven. 101 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-01-31 08:54:51,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990365327] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:54:51,441 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:54:51,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 18] total 28 [2022-01-31 08:54:51,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121018927] [2022-01-31 08:54:51,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:54:51,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 08:54:51,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:54:51,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 08:54:51,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=670, Unknown=6, NotChecked=0, Total=756 [2022-01-31 08:54:51,442 INFO L87 Difference]: Start difference. First operand 110 states and 122 transitions. Second operand has 28 states, 27 states have (on average 2.814814814814815) internal successors, (76), 25 states have internal predecessors, (76), 12 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-01-31 08:55:01,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:55:01,919 INFO L93 Difference]: Finished difference Result 145 states and 161 transitions. [2022-01-31 08:55:01,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 08:55:01,919 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.814814814814815) internal successors, (76), 25 states have internal predecessors, (76), 12 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) Word has length 78 [2022-01-31 08:55:01,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:55:01,920 INFO L225 Difference]: With dead ends: 145 [2022-01-31 08:55:01,920 INFO L226 Difference]: Without dead ends: 145 [2022-01-31 08:55:01,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 148 SyntacticMatches, 15 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 56.7s TimeCoverageRelationStatistics Valid=137, Invalid=1334, Unknown=11, NotChecked=0, Total=1482 [2022-01-31 08:55:01,921 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 61 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 1041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 08:55:01,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 294 Invalid, 1041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 884 Invalid, 0 Unknown, 122 Unchecked, 0.3s Time] [2022-01-31 08:55:01,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-01-31 08:55:01,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 140. [2022-01-31 08:55:01,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 114 states have (on average 1.1228070175438596) internal successors, (128), 116 states have internal predecessors, (128), 15 states have call successors, (15), 11 states have call predecessors, (15), 10 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2022-01-31 08:55:01,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 157 transitions. [2022-01-31 08:55:01,924 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 157 transitions. Word has length 78 [2022-01-31 08:55:01,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:55:01,924 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 157 transitions. [2022-01-31 08:55:01,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.814814814814815) internal successors, (76), 25 states have internal predecessors, (76), 12 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-01-31 08:55:01,925 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 157 transitions. [2022-01-31 08:55:01,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-31 08:55:01,925 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:55:01,925 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:55:01,953 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 08:55:02,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:55:02,144 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:55:02,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:55:02,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1387871521, now seen corresponding path program 15 times [2022-01-31 08:55:02,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:55:02,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911365506] [2022-01-31 08:55:02,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:55:02,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:55:02,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:55:02,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:55:02,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:55:02,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:55:02,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:55:02,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 08:55:02,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:55:02,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 08:55:02,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:55:02,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 08:55:02,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:55:02,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 08:55:02,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:55:02,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 08:55:02,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:55:02,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 08:55:02,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:55:02,294 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 63 proven. 72 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 08:55:02,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:55:02,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911365506] [2022-01-31 08:55:02,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911365506] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:55:02,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174821746] [2022-01-31 08:55:02,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:55:02,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:55:02,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:55:02,312 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 08:55:02,362 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 08:55:02,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-31 08:55:02,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:55:02,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-31 08:55:02,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:55:02,855 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 84 proven. 51 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 08:55:02,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:55:02,991 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 84 proven. 51 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 08:55:02,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174821746] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:55:02,992 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:55:02,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 27 [2022-01-31 08:55:02,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005566434] [2022-01-31 08:55:02,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:55:02,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 08:55:02,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:55:02,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 08:55:02,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=535, Unknown=0, NotChecked=0, Total=702 [2022-01-31 08:55:02,993 INFO L87 Difference]: Start difference. First operand 140 states and 157 transitions. Second operand has 27 states, 27 states have (on average 3.1481481481481484) internal successors, (85), 26 states have internal predecessors, (85), 15 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-01-31 08:55:03,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:55:03,240 INFO L93 Difference]: Finished difference Result 196 states and 213 transitions. [2022-01-31 08:55:03,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 08:55:03,241 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.1481481481481484) internal successors, (85), 26 states have internal predecessors, (85), 15 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) Word has length 86 [2022-01-31 08:55:03,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:55:03,241 INFO L225 Difference]: With dead ends: 196 [2022-01-31 08:55:03,241 INFO L226 Difference]: Without dead ends: 146 [2022-01-31 08:55:03,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=914, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 08:55:03,242 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 104 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:55:03,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 116 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 08:55:03,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-01-31 08:55:03,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 140. [2022-01-31 08:55:03,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 114 states have (on average 1.1140350877192982) internal successors, (127), 116 states have internal predecessors, (127), 15 states have call successors, (15), 11 states have call predecessors, (15), 10 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2022-01-31 08:55:03,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 156 transitions. [2022-01-31 08:55:03,248 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 156 transitions. Word has length 86 [2022-01-31 08:55:03,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:55:03,248 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 156 transitions. [2022-01-31 08:55:03,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.1481481481481484) internal successors, (85), 26 states have internal predecessors, (85), 15 states have call successors, (18), 4 states have call predecessors, (18), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-01-31 08:55:03,248 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 156 transitions. [2022-01-31 08:55:03,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-31 08:55:03,250 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:55:03,250 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:55:03,267 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 08:55:03,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:55:03,459 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:55:03,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:55:03,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1505151401, now seen corresponding path program 16 times [2022-01-31 08:55:03,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:55:03,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062724631] [2022-01-31 08:55:03,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:55:03,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:55:03,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:55:03,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:55:03,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:55:03,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:55:03,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:55:03,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-31 08:55:03,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:55:03,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-31 08:55:03,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:55:03,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-31 08:55:03,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:55:03,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-01-31 08:55:03,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:55:03,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-01-31 08:55:03,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:55:03,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-01-31 08:55:03,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:55:03,759 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 12 proven. 142 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 08:55:03,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:55:03,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062724631] [2022-01-31 08:55:03,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062724631] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:55:03,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445451135] [2022-01-31 08:55:03,760 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 08:55:03,760 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:55:03,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:55:03,761 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 08:55:03,775 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 08:55:03,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 08:55:03,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:55:03,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-31 08:55:03,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:55:03,916 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 08:56:15,029 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 23 treesize of output 7 [2022-01-31 08:56:15,071 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 08:56:15,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:56:17,207 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 16 treesize of output 14 [2022-01-31 08:56:17,209 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 28 treesize of output 24 [2022-01-31 08:56:17,300 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 12 proven. 142 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 08:56:17,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445451135] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:56:17,301 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:56:17,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 20] total 31 [2022-01-31 08:56:17,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059650925] [2022-01-31 08:56:17,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:56:17,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 08:56:17,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:56:17,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 08:56:17,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=833, Unknown=7, NotChecked=0, Total=930 [2022-01-31 08:56:17,302 INFO L87 Difference]: Start difference. First operand 140 states and 156 transitions. Second operand has 31 states, 30 states have (on average 2.8333333333333335) internal successors, (85), 28 states have internal predecessors, (85), 14 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-01-31 08:56:29,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:56:29,891 INFO L93 Difference]: Finished difference Result 204 states and 221 transitions. [2022-01-31 08:56:29,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 08:56:29,894 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.8333333333333335) internal successors, (85), 28 states have internal predecessors, (85), 14 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) Word has length 89 [2022-01-31 08:56:29,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:56:29,897 INFO L225 Difference]: With dead ends: 204 [2022-01-31 08:56:29,897 INFO L226 Difference]: Without dead ends: 204 [2022-01-31 08:56:29,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 168 SyntacticMatches, 17 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 85.3s TimeCoverageRelationStatistics Valid=139, Invalid=1488, Unknown=13, NotChecked=0, Total=1640 [2022-01-31 08:56:29,898 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 79 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 1259 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 1418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 08:56:29,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 391 Invalid, 1418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1259 Invalid, 0 Unknown, 117 Unchecked, 0.5s Time] [2022-01-31 08:56:29,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-01-31 08:56:29,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 187. [2022-01-31 08:56:29,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 149 states have (on average 1.087248322147651) internal successors, (162), 152 states have internal predecessors, (162), 21 states have call successors, (21), 17 states have call predecessors, (21), 16 states have return successors, (20), 17 states have call predecessors, (20), 20 states have call successors, (20) [2022-01-31 08:56:29,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 203 transitions. [2022-01-31 08:56:29,916 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 203 transitions. Word has length 89 [2022-01-31 08:56:29,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:56:29,919 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 203 transitions. [2022-01-31 08:56:29,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.8333333333333335) internal successors, (85), 28 states have internal predecessors, (85), 14 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-01-31 08:56:29,920 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 203 transitions. [2022-01-31 08:56:29,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-31 08:56:29,920 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:56:29,920 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:56:29,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-01-31 08:56:30,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:56:30,144 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:56:30,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:56:30,144 INFO L85 PathProgramCache]: Analyzing trace with hash -442291871, now seen corresponding path program 17 times [2022-01-31 08:56:30,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:56:30,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815861687] [2022-01-31 08:56:30,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:56:30,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:56:30,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:56:30,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:56:30,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:56:30,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:56:30,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:56:30,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 08:56:30,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:56:30,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 08:56:30,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:56:30,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 08:56:30,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:56:30,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 08:56:30,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:56:30,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 08:56:30,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:56:30,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 08:56:30,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:56:30,519 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 12 proven. 164 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 08:56:30,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:56:30,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815861687] [2022-01-31 08:56:30,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815861687] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:56:30,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233456293] [2022-01-31 08:56:30,519 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 08:56:30,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:56:30,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:56:30,536 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 08:56:30,592 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 08:56:30,786 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-01-31 08:56:30,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:56:30,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 40 conjunts are in the unsatisfiable core [2022-01-31 08:56:30,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:56:30,960 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 08:56:31,024 INFO L353 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-01-31 08:56:31,024 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 27 treesize of output 26 [2022-01-31 08:57:40,893 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 23 treesize of output 7 [2022-01-31 08:57:40,935 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 08:57:40,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:57:43,126 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 16 treesize of output 14 [2022-01-31 08:57:43,131 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 28 treesize of output 24 [2022-01-31 08:57:43,242 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 12 proven. 164 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 08:57:43,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233456293] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:57:43,242 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:57:43,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 34 [2022-01-31 08:57:43,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567317926] [2022-01-31 08:57:43,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:57:43,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 08:57:43,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:57:43,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 08:57:43,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1004, Unknown=7, NotChecked=0, Total=1122 [2022-01-31 08:57:43,243 INFO L87 Difference]: Start difference. First operand 187 states and 203 transitions. Second operand has 34 states, 33 states have (on average 2.757575757575758) internal successors, (91), 31 states have internal predecessors, (91), 14 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-01-31 08:57:55,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:57:55,940 INFO L93 Difference]: Finished difference Result 262 states and 280 transitions. [2022-01-31 08:57:55,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 08:57:55,940 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.757575757575758) internal successors, (91), 31 states have internal predecessors, (91), 14 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) Word has length 92 [2022-01-31 08:57:55,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:57:55,942 INFO L225 Difference]: With dead ends: 262 [2022-01-31 08:57:55,942 INFO L226 Difference]: Without dead ends: 262 [2022-01-31 08:57:55,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 171 SyntacticMatches, 18 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 84.2s TimeCoverageRelationStatistics Valid=174, Invalid=1883, Unknown=13, NotChecked=0, Total=2070 [2022-01-31 08:57:55,942 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 70 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 1453 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 1669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 08:57:55,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 445 Invalid, 1669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1453 Invalid, 0 Unknown, 157 Unchecked, 0.5s Time] [2022-01-31 08:57:55,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-01-31 08:57:55,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 187. [2022-01-31 08:57:55,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 149 states have (on average 1.087248322147651) internal successors, (162), 152 states have internal predecessors, (162), 21 states have call successors, (21), 17 states have call predecessors, (21), 16 states have return successors, (20), 17 states have call predecessors, (20), 20 states have call successors, (20) [2022-01-31 08:57:55,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 203 transitions. [2022-01-31 08:57:55,947 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 203 transitions. Word has length 92 [2022-01-31 08:57:55,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:57:55,947 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 203 transitions. [2022-01-31 08:57:55,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.757575757575758) internal successors, (91), 31 states have internal predecessors, (91), 14 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-01-31 08:57:55,947 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 203 transitions. [2022-01-31 08:57:55,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 08:57:55,948 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:57:55,948 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:57:55,996 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 08:57:56,148 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,SelfDestructingSolverStorable21 [2022-01-31 08:57:56,149 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:57:56,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:57:56,149 INFO L85 PathProgramCache]: Analyzing trace with hash 707060247, now seen corresponding path program 18 times [2022-01-31 08:57:56,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:57:56,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663989196] [2022-01-31 08:57:56,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:57:56,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:57:56,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:57:56,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:57:56,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:57:56,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:57:56,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:57:56,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-01-31 08:57:56,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:57:56,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-01-31 08:57:56,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:57:56,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-31 08:57:56,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:57:56,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-01-31 08:57:56,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:57:56,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-01-31 08:57:56,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:57:56,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-01-31 08:57:56,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:57:56,453 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 12 proven. 189 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 08:57:56,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:57:56,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663989196] [2022-01-31 08:57:56,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663989196] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:57:56,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005323472] [2022-01-31 08:57:56,454 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 08:57:56,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:57:56,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:57:56,464 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 08:57:56,465 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 08:57:56,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-01-31 08:57:56,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:57:56,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-31 08:57:56,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:57:56,938 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 08:57:56,971 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-31 08:57:56,972 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 08:57:57,008 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-31 08:57:57,008 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 08:59:03,137 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 23 treesize of output 7 [2022-01-31 08:59:03,179 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 2 proven. 199 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-31 08:59:03,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:59:05,436 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 16 treesize of output 14 [2022-01-31 08:59:05,437 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 28 treesize of output 24 [2022-01-31 08:59:05,512 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 12 proven. 188 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-01-31 08:59:05,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005323472] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:59:05,512 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:59:05,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 35 [2022-01-31 08:59:05,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873792916] [2022-01-31 08:59:05,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:59:05,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 08:59:05,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:59:05,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 08:59:05,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1065, Unknown=7, NotChecked=0, Total=1190 [2022-01-31 08:59:05,528 INFO L87 Difference]: Start difference. First operand 187 states and 203 transitions. Second operand has 35 states, 34 states have (on average 2.823529411764706) internal successors, (96), 32 states have internal predecessors, (96), 14 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-01-31 08:59:18,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:59:18,354 INFO L93 Difference]: Finished difference Result 213 states and 229 transitions. [2022-01-31 08:59:18,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 08:59:18,354 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.823529411764706) internal successors, (96), 32 states have internal predecessors, (96), 14 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) Word has length 95 [2022-01-31 08:59:18,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:59:18,355 INFO L225 Difference]: With dead ends: 213 [2022-01-31 08:59:18,355 INFO L226 Difference]: Without dead ends: 213 [2022-01-31 08:59:18,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 177 SyntacticMatches, 20 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 80.5s TimeCoverageRelationStatistics Valid=191, Invalid=2052, Unknown=13, NotChecked=0, Total=2256 [2022-01-31 08:59:18,356 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 80 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 1598 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 1778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 08:59:18,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 465 Invalid, 1778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1598 Invalid, 0 Unknown, 126 Unchecked, 0.6s Time] [2022-01-31 08:59:18,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-01-31 08:59:18,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 187. [2022-01-31 08:59:18,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 149 states have (on average 1.087248322147651) internal successors, (162), 152 states have internal predecessors, (162), 21 states have call successors, (21), 17 states have call predecessors, (21), 16 states have return successors, (20), 17 states have call predecessors, (20), 20 states have call successors, (20) [2022-01-31 08:59:18,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 203 transitions. [2022-01-31 08:59:18,360 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 203 transitions. Word has length 95 [2022-01-31 08:59:18,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:59:18,360 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 203 transitions. [2022-01-31 08:59:18,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.823529411764706) internal successors, (96), 32 states have internal predecessors, (96), 14 states have call successors, (19), 5 states have call predecessors, (19), 2 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-01-31 08:59:18,360 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 203 transitions. [2022-01-31 08:59:18,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-01-31 08:59:18,361 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:59:18,361 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:59:18,383 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-01-31 08:59:18,561 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,SelfDestructingSolverStorable22 [2022-01-31 08:59:18,562 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:59:18,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:59:18,562 INFO L85 PathProgramCache]: Analyzing trace with hash 520733451, now seen corresponding path program 19 times [2022-01-31 08:59:18,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:59:18,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395996975] [2022-01-31 08:59:18,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:59:18,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:59:18,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:59:18,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:59:18,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:59:18,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:59:18,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:59:18,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-31 08:59:18,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:59:18,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-01-31 08:59:18,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:59:18,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-01-31 08:59:18,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:59:18,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-01-31 08:59:18,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:59:18,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-01-31 08:59:18,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:59:18,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-01-31 08:59:18,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:59:18,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-01-31 08:59:18,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:59:18,769 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 87 proven. 95 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-01-31 08:59:18,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:59:18,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395996975] [2022-01-31 08:59:18,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395996975] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:59:18,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067747915] [2022-01-31 08:59:18,769 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 08:59:18,769 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:59:18,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:59:18,772 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 08:59:18,773 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 08:59:18,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:59:18,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-31 08:59:18,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:59:19,220 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 112 proven. 70 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-01-31 08:59:19,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:59:19,407 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 112 proven. 70 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-01-31 08:59:19,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067747915] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:59:19,408 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:59:19,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 30 [2022-01-31 08:59:19,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085918427] [2022-01-31 08:59:19,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:59:19,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 08:59:19,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:59:19,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 08:59:19,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2022-01-31 08:59:19,409 INFO L87 Difference]: Start difference. First operand 187 states and 203 transitions. Second operand has 30 states, 30 states have (on average 3.1333333333333333) internal successors, (94), 29 states have internal predecessors, (94), 17 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2022-01-31 08:59:19,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:59:19,718 INFO L93 Difference]: Finished difference Result 251 states and 267 transitions. [2022-01-31 08:59:19,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 08:59:19,719 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.1333333333333333) internal successors, (94), 29 states have internal predecessors, (94), 17 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) Word has length 97 [2022-01-31 08:59:19,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:59:19,720 INFO L225 Difference]: With dead ends: 251 [2022-01-31 08:59:19,720 INFO L226 Difference]: Without dead ends: 193 [2022-01-31 08:59:19,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 201 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=341, Invalid=1141, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 08:59:19,722 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 112 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:59:19,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 126 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 08:59:19,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-01-31 08:59:19,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 187. [2022-01-31 08:59:19,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 149 states have (on average 1.080536912751678) internal successors, (161), 152 states have internal predecessors, (161), 21 states have call successors, (21), 17 states have call predecessors, (21), 16 states have return successors, (20), 17 states have call predecessors, (20), 20 states have call successors, (20) [2022-01-31 08:59:19,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 202 transitions. [2022-01-31 08:59:19,729 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 202 transitions. Word has length 97 [2022-01-31 08:59:19,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:59:19,730 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 202 transitions. [2022-01-31 08:59:19,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.1333333333333333) internal successors, (94), 29 states have internal predecessors, (94), 17 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2022-01-31 08:59:19,730 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 202 transitions. [2022-01-31 08:59:19,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-01-31 08:59:19,731 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:59:19,731 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:59:19,757 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 08:59:19,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:59:19,947 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:59:19,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:59:19,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1251144683, now seen corresponding path program 20 times [2022-01-31 08:59:19,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:59:19,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881438941] [2022-01-31 08:59:19,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:59:19,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:59:19,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:59:20,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:59:20,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:59:20,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 08:59:20,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:59:20,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 08:59:20,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:59:20,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 08:59:20,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:59:20,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 08:59:20,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:59:20,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 08:59:20,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:59:20,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 08:59:20,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:59:20,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 08:59:20,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:59:20,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 08:59:20,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:59:20,319 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 14 proven. 190 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-01-31 08:59:20,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:59:20,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881438941] [2022-01-31 08:59:20,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881438941] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:59:20,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060081352] [2022-01-31 08:59:20,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:59:20,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:59:20,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:59:20,337 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 08:59:20,338 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 08:59:20,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:59:20,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:59:20,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-31 08:59:20,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:59:20,571 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 09:00:43,323 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 23 treesize of output 7 [2022-01-31 09:00:43,363 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 204 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-01-31 09:00:43,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:00:45,502 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 16 treesize of output 14 [2022-01-31 09:00:45,504 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 28 treesize of output 24 [2022-01-31 09:00:45,594 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 14 proven. 190 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-01-31 09:00:45,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060081352] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:00:45,595 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:00:45,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 22] total 34 [2022-01-31 09:00:45,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593591165] [2022-01-31 09:00:45,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:00:45,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 09:00:45,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:00:45,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 09:00:45,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1014, Unknown=8, NotChecked=0, Total=1122 [2022-01-31 09:00:45,596 INFO L87 Difference]: Start difference. First operand 187 states and 202 transitions. Second operand has 34 states, 33 states have (on average 2.8484848484848486) internal successors, (94), 31 states have internal predecessors, (94), 16 states have call successors, (21), 5 states have call predecessors, (21), 2 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2022-01-31 09:01:00,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:01:00,288 INFO L93 Difference]: Finished difference Result 198 states and 213 transitions. [2022-01-31 09:01:00,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 09:01:00,288 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.8484848484848486) internal successors, (94), 31 states have internal predecessors, (94), 16 states have call successors, (21), 5 states have call predecessors, (21), 2 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) Word has length 100 [2022-01-31 09:01:00,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:01:00,289 INFO L225 Difference]: With dead ends: 198 [2022-01-31 09:01:00,289 INFO L226 Difference]: Without dead ends: 198 [2022-01-31 09:01:00,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 189 SyntacticMatches, 19 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 99.1s TimeCoverageRelationStatistics Valid=160, Invalid=1895, Unknown=15, NotChecked=0, Total=2070 [2022-01-31 09:01:00,290 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 67 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 1446 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 1596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 09:01:00,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 439 Invalid, 1596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1446 Invalid, 0 Unknown, 107 Unchecked, 0.5s Time] [2022-01-31 09:01:00,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-01-31 09:01:00,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 195. [2022-01-31 09:01:00,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 155 states have (on average 1.0774193548387097) internal successors, (167), 158 states have internal predecessors, (167), 22 states have call successors, (22), 18 states have call predecessors, (22), 17 states have return successors, (21), 18 states have call predecessors, (21), 21 states have call successors, (21) [2022-01-31 09:01:00,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 210 transitions. [2022-01-31 09:01:00,293 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 210 transitions. Word has length 100 [2022-01-31 09:01:00,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:01:00,294 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 210 transitions. [2022-01-31 09:01:00,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.8484848484848486) internal successors, (94), 31 states have internal predecessors, (94), 16 states have call successors, (21), 5 states have call predecessors, (21), 2 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2022-01-31 09:01:00,294 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 210 transitions. [2022-01-31 09:01:00,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-01-31 09:01:00,294 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:01:00,294 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:01:00,311 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 09:01:00,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:01:00,495 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:01:00,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:01:00,495 INFO L85 PathProgramCache]: Analyzing trace with hash -131341074, now seen corresponding path program 3 times [2022-01-31 09:01:00,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:01:00,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778681804] [2022-01-31 09:01:00,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:01:00,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:01:00,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:01:00,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:01:00,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:01:00,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 09:01:00,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:01:00,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-01-31 09:01:00,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:01:00,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-01-31 09:01:00,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:01:00,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-01-31 09:01:00,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:01:00,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-01-31 09:01:00,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:01:00,672 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 37 proven. 301 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-01-31 09:01:00,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:01:00,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778681804] [2022-01-31 09:01:00,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778681804] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:01:00,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515098892] [2022-01-31 09:01:00,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 09:01:00,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:01:00,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:01:00,685 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 09:01:00,686 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 09:01:00,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-01-31 09:01:00,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:01:00,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-31 09:01:00,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:01:01,039 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 29 proven. 301 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-01-31 09:01:01,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:01:01,497 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 37 proven. 301 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-01-31 09:01:01,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515098892] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:01:01,497 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:01:01,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-01-31 09:01:01,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28330411] [2022-01-31 09:01:01,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:01:01,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 09:01:01,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:01:01,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 09:01:01,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 09:01:01,499 INFO L87 Difference]: Start difference. First operand 195 states and 210 transitions. Second operand has 34 states, 34 states have (on average 3.411764705882353) internal successors, (116), 33 states have internal predecessors, (116), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 09:01:01,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:01:01,909 INFO L93 Difference]: Finished difference Result 355 states and 408 transitions. [2022-01-31 09:01:01,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 09:01:01,909 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.411764705882353) internal successors, (116), 33 states have internal predecessors, (116), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 97 [2022-01-31 09:01:01,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:01:01,910 INFO L225 Difference]: With dead ends: 355 [2022-01-31 09:01:01,910 INFO L226 Difference]: Without dead ends: 355 [2022-01-31 09:01:01,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 09:01:01,911 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 212 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 09:01:01,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 157 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 09:01:01,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-01-31 09:01:01,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 243. [2022-01-31 09:01:01,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 203 states have (on average 1.1379310344827587) internal successors, (231), 206 states have internal predecessors, (231), 22 states have call successors, (22), 18 states have call predecessors, (22), 17 states have return successors, (21), 18 states have call predecessors, (21), 21 states have call successors, (21) [2022-01-31 09:01:01,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 274 transitions. [2022-01-31 09:01:01,918 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 274 transitions. Word has length 97 [2022-01-31 09:01:01,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:01:01,918 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 274 transitions. [2022-01-31 09:01:01,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.411764705882353) internal successors, (116), 33 states have internal predecessors, (116), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 09:01:01,918 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 274 transitions. [2022-01-31 09:01:01,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-01-31 09:01:01,919 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:01:01,919 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:01:01,936 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 09:01:02,135 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,SelfDestructingSolverStorable25 [2022-01-31 09:01:02,135 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:01:02,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:01:02,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1448278729, now seen corresponding path program 21 times [2022-01-31 09:01:02,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:01:02,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044921168] [2022-01-31 09:01:02,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:01:02,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:01:02,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:01:02,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:01:02,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:01:02,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 09:01:02,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:01:02,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 09:01:02,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:01:02,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 09:01:02,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:01:02,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 09:01:02,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:01:02,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 09:01:02,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:01:02,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 09:01:02,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:01:02,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 09:01:02,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:01:02,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 09:01:02,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:01:02,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 09:01:02,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:01:02,323 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 115 proven. 121 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-01-31 09:01:02,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:01:02,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044921168] [2022-01-31 09:01:02,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044921168] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:01:02,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671204209] [2022-01-31 09:01:02,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 09:01:02,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:01:02,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:01:02,325 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 09:01:02,326 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 09:01:02,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-01-31 09:01:02,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:01:02,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-31 09:01:02,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:01:02,861 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 144 proven. 92 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-01-31 09:01:02,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:01:03,051 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 144 proven. 92 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-01-31 09:01:03,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671204209] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:01:03,052 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:01:03,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 33 [2022-01-31 09:01:03,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806177672] [2022-01-31 09:01:03,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:01:03,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 09:01:03,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:01:03,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 09:01:03,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 09:01:03,053 INFO L87 Difference]: Start difference. First operand 243 states and 274 transitions. Second operand has 33 states, 33 states have (on average 3.121212121212121) internal successors, (103), 32 states have internal predecessors, (103), 19 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) [2022-01-31 09:01:03,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:01:03,343 INFO L93 Difference]: Finished difference Result 276 states and 307 transitions. [2022-01-31 09:01:03,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 09:01:03,343 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.121212121212121) internal successors, (103), 32 states have internal predecessors, (103), 19 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) Word has length 108 [2022-01-31 09:01:03,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:01:03,344 INFO L225 Difference]: With dead ends: 276 [2022-01-31 09:01:03,344 INFO L226 Difference]: Without dead ends: 210 [2022-01-31 09:01:03,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 224 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=413, Invalid=1393, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 09:01:03,345 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 164 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:01:03,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 129 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 09:01:03,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-01-31 09:01:03,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 204. [2022-01-31 09:01:03,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 174 states have (on average 1.1551724137931034) internal successors, (201), 176 states have internal predecessors, (201), 17 states have call successors, (17), 13 states have call predecessors, (17), 12 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-01-31 09:01:03,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 234 transitions. [2022-01-31 09:01:03,349 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 234 transitions. Word has length 108 [2022-01-31 09:01:03,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:01:03,349 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 234 transitions. [2022-01-31 09:01:03,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.121212121212121) internal successors, (103), 32 states have internal predecessors, (103), 19 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) [2022-01-31 09:01:03,349 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 234 transitions. [2022-01-31 09:01:03,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-01-31 09:01:03,350 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:01:03,350 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:01:03,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-01-31 09:01:03,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-31 09:01:03,556 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:01:03,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:01:03,556 INFO L85 PathProgramCache]: Analyzing trace with hash -383219841, now seen corresponding path program 22 times [2022-01-31 09:01:03,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:01:03,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32820846] [2022-01-31 09:01:03,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:01:03,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:01:03,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:01:03,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:01:03,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:01:03,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 09:01:03,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:01:03,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-01-31 09:01:03,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:01:03,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-01-31 09:01:03,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:01:03,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-31 09:01:03,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:01:03,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-01-31 09:01:03,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:01:03,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-01-31 09:01:03,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:01:03,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-01-31 09:01:03,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:01:03,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-01-31 09:01:03,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:01:03,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-01-31 09:01:03,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:01:03,955 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 16 proven. 245 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-01-31 09:01:03,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:01:03,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32820846] [2022-01-31 09:01:03,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32820846] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:01:03,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949159561] [2022-01-31 09:01:03,956 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 09:01:03,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:01:03,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:01:03,957 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:01:03,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-31 09:01:04,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 09:01:04,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:01:04,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 45 conjunts are in the unsatisfiable core [2022-01-31 09:01:04,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:01:04,134 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 09:02:59,170 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 23 treesize of output 7 [2022-01-31 09:02:59,214 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-01-31 09:02:59,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:03:01,370 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 16 treesize of output 14 [2022-01-31 09:03:01,371 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 28 treesize of output 24 [2022-01-31 09:03:01,468 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 16 proven. 245 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-01-31 09:03:01,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949159561] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:03:01,468 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:03:01,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 24] total 37 [2022-01-31 09:03:01,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453972463] [2022-01-31 09:03:01,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:03:01,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 09:03:01,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:03:01,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 09:03:01,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1213, Unknown=9, NotChecked=0, Total=1332 [2022-01-31 09:03:01,470 INFO L87 Difference]: Start difference. First operand 204 states and 234 transitions. Second operand has 37 states, 36 states have (on average 2.861111111111111) internal successors, (103), 34 states have internal predecessors, (103), 18 states have call successors, (23), 5 states have call predecessors, (23), 2 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-01-31 09:03:18,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:03:18,201 INFO L93 Difference]: Finished difference Result 215 states and 245 transitions. [2022-01-31 09:03:18,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 09:03:18,201 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.861111111111111) internal successors, (103), 34 states have internal predecessors, (103), 18 states have call successors, (23), 5 states have call predecessors, (23), 2 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) Word has length 111 [2022-01-31 09:03:18,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:03:18,202 INFO L225 Difference]: With dead ends: 215 [2022-01-31 09:03:18,202 INFO L226 Difference]: Without dead ends: 215 [2022-01-31 09:03:18,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 210 SyntacticMatches, 21 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 133.4s TimeCoverageRelationStatistics Valid=174, Invalid=2259, Unknown=17, NotChecked=0, Total=2450 [2022-01-31 09:03:18,203 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 69 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 1586 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 1756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 09:03:18,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 496 Invalid, 1756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1586 Invalid, 0 Unknown, 123 Unchecked, 0.5s Time] [2022-01-31 09:03:18,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-01-31 09:03:18,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 212. [2022-01-31 09:03:18,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 180 states have (on average 1.15) internal successors, (207), 182 states have internal predecessors, (207), 18 states have call successors, (18), 14 states have call predecessors, (18), 13 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2022-01-31 09:03:18,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 242 transitions. [2022-01-31 09:03:18,206 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 242 transitions. Word has length 111 [2022-01-31 09:03:18,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:03:18,214 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 242 transitions. [2022-01-31 09:03:18,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.861111111111111) internal successors, (103), 34 states have internal predecessors, (103), 18 states have call successors, (23), 5 states have call predecessors, (23), 2 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-01-31 09:03:18,215 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 242 transitions. [2022-01-31 09:03:18,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-01-31 09:03:18,216 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:03:18,216 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:03:18,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-31 09:03:18,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-31 09:03:18,421 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:03:18,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:03:18,421 INFO L85 PathProgramCache]: Analyzing trace with hash -457610189, now seen corresponding path program 23 times [2022-01-31 09:03:18,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:03:18,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692207294] [2022-01-31 09:03:18,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:03:18,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:03:18,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:18,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:03:18,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:18,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 09:03:18,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:18,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-01-31 09:03:18,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:18,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-01-31 09:03:18,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:18,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-01-31 09:03:18,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:18,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-01-31 09:03:18,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:18,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-01-31 09:03:18,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:18,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-01-31 09:03:18,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:18,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-01-31 09:03:18,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:18,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-01-31 09:03:18,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:18,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-01-31 09:03:18,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:18,661 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 147 proven. 150 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-01-31 09:03:18,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:03:18,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692207294] [2022-01-31 09:03:18,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692207294] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:03:18,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87622374] [2022-01-31 09:03:18,661 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 09:03:18,661 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:03:18,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:03:18,662 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:03:18,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-31 09:03:18,820 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-01-31 09:03:18,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:03:18,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-31 09:03:18,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:03:19,197 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 180 proven. 117 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-01-31 09:03:19,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:03:19,398 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 180 proven. 117 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-01-31 09:03:19,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87622374] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:03:19,398 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 09:03:19,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 36 [2022-01-31 09:03:19,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798482916] [2022-01-31 09:03:19,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 09:03:19,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 09:03:19,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:03:19,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 09:03:19,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=967, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 09:03:19,399 INFO L87 Difference]: Start difference. First operand 212 states and 242 transitions. Second operand has 36 states, 36 states have (on average 3.111111111111111) internal successors, (112), 35 states have internal predecessors, (112), 21 states have call successors, (24), 4 states have call predecessors, (24), 2 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2022-01-31 09:03:19,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:03:19,763 INFO L93 Difference]: Finished difference Result 292 states and 322 transitions. [2022-01-31 09:03:19,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 09:03:19,764 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.111111111111111) internal successors, (112), 35 states have internal predecessors, (112), 21 states have call successors, (24), 4 states have call predecessors, (24), 2 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) Word has length 119 [2022-01-31 09:03:19,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:03:19,765 INFO L225 Difference]: With dead ends: 292 [2022-01-31 09:03:19,765 INFO L226 Difference]: Without dead ends: 218 [2022-01-31 09:03:19,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 247 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=492, Invalid=1670, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 09:03:19,766 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 152 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 09:03:19,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 150 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 09:03:19,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-01-31 09:03:19,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 212. [2022-01-31 09:03:19,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 180 states have (on average 1.1444444444444444) internal successors, (206), 182 states have internal predecessors, (206), 18 states have call successors, (18), 14 states have call predecessors, (18), 13 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2022-01-31 09:03:19,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 241 transitions. [2022-01-31 09:03:19,769 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 241 transitions. Word has length 119 [2022-01-31 09:03:19,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:03:19,769 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 241 transitions. [2022-01-31 09:03:19,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.111111111111111) internal successors, (112), 35 states have internal predecessors, (112), 21 states have call successors, (24), 4 states have call predecessors, (24), 2 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2022-01-31 09:03:19,769 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 241 transitions. [2022-01-31 09:03:19,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-01-31 09:03:19,770 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:03:19,770 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:03:19,787 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-01-31 09:03:19,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-31 09:03:19,979 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:03:19,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:03:19,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1233121725, now seen corresponding path program 24 times [2022-01-31 09:03:19,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:03:19,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769909370] [2022-01-31 09:03:19,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:03:19,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:03:19,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:20,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:03:20,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:20,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 09:03:20,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:20,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 09:03:20,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:20,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 09:03:20,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:20,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 09:03:20,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:20,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 09:03:20,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:20,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 09:03:20,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:20,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 09:03:20,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:20,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 09:03:20,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:20,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 09:03:20,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:20,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 09:03:20,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:20,359 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 18 proven. 307 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-01-31 09:03:20,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:03:20,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769909370] [2022-01-31 09:03:20,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769909370] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:03:20,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307182105] [2022-01-31 09:03:20,360 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 09:03:20,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:03:20,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:03:20,361 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:03:20,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-31 09:03:20,839 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-01-31 09:03:20,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:03:20,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-31 09:03:20,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:03:21,093 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 09:03:43,924 INFO L353 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-01-31 09:03:43,925 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 24 treesize of output 10 [2022-01-31 09:03:43,995 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 177 proven. 172 refuted. 32 times theorem prover too weak. 88 trivial. 0 not checked. [2022-01-31 09:03:43,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:03:44,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307182105] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:03:44,162 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:03:44,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 32] total 57 [2022-01-31 09:03:44,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424840359] [2022-01-31 09:03:44,163 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:03:44,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 09:03:44,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:03:44,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 09:03:44,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=3072, Unknown=3, NotChecked=0, Total=3422 [2022-01-31 09:03:44,165 INFO L87 Difference]: Start difference. First operand 212 states and 241 transitions. Second operand has 57 states, 56 states have (on average 2.5714285714285716) internal successors, (144), 54 states have internal predecessors, (144), 20 states have call successors, (24), 6 states have call predecessors, (24), 3 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) [2022-01-31 09:03:49,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:03:49,700 INFO L93 Difference]: Finished difference Result 316 states and 342 transitions. [2022-01-31 09:03:49,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 09:03:49,700 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 2.5714285714285716) internal successors, (144), 54 states have internal predecessors, (144), 20 states have call successors, (24), 6 states have call predecessors, (24), 3 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) Word has length 122 [2022-01-31 09:03:49,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:03:49,701 INFO L225 Difference]: With dead ends: 316 [2022-01-31 09:03:49,701 INFO L226 Difference]: Without dead ends: 234 [2022-01-31 09:03:49,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 129 SyntacticMatches, 15 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2196 ImplicationChecksByTransitivity, 27.7s TimeCoverageRelationStatistics Valid=787, Invalid=8714, Unknown=5, NotChecked=0, Total=9506 [2022-01-31 09:03:49,704 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 64 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 1247 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 1710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 407 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 09:03:49,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 546 Invalid, 1710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1247 Invalid, 0 Unknown, 407 Unchecked, 0.5s Time] [2022-01-31 09:03:49,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-01-31 09:03:49,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 232. [2022-01-31 09:03:49,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 195 states have (on average 1.1282051282051282) internal successors, (220), 197 states have internal predecessors, (220), 19 states have call successors, (19), 18 states have call predecessors, (19), 17 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-01-31 09:03:49,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 257 transitions. [2022-01-31 09:03:49,707 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 257 transitions. Word has length 122 [2022-01-31 09:03:49,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:03:49,707 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 257 transitions. [2022-01-31 09:03:49,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 2.5714285714285716) internal successors, (144), 54 states have internal predecessors, (144), 20 states have call successors, (24), 6 states have call predecessors, (24), 3 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) [2022-01-31 09:03:49,708 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 257 transitions. [2022-01-31 09:03:49,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-01-31 09:03:49,708 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:03:49,708 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:03:49,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-01-31 09:03:49,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:03:49,923 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:03:49,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:03:49,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1329514329, now seen corresponding path program 25 times [2022-01-31 09:03:49,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:03:49,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719623126] [2022-01-31 09:03:49,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:03:49,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:03:49,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:50,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:03:50,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:50,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 09:03:50,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:50,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-01-31 09:03:50,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:50,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-31 09:03:50,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:50,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-31 09:03:50,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:50,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-01-31 09:03:50,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:50,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-01-31 09:03:50,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:50,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-01-31 09:03:50,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:50,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-01-31 09:03:50,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:50,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-01-31 09:03:50,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:50,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-01-31 09:03:50,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:50,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-01-31 09:03:50,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:50,365 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 20 proven. 376 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-01-31 09:03:50,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:03:50,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719623126] [2022-01-31 09:03:50,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719623126] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 09:03:50,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119932795] [2022-01-31 09:03:50,366 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 09:03:50,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:03:50,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:03:50,367 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:03:50,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-31 09:03:50,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:50,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 53 conjunts are in the unsatisfiable core [2022-01-31 09:03:50,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:03:50,616 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