/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-patterns/array15_pattern.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 10:08:41,009 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 10:08:41,010 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 10:08:41,056 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 10:08:41,056 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 10:08:41,057 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 10:08:41,058 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 10:08:41,062 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 10:08:41,066 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 10:08:41,066 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 10:08:41,067 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 10:08:41,067 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 10:08:41,068 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 10:08:41,068 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 10:08:41,069 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 10:08:41,069 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 10:08:41,070 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 10:08:41,070 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 10:08:41,071 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 10:08:41,072 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 10:08:41,073 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 10:08:41,075 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 10:08:41,076 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 10:08:41,076 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 10:08:41,078 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 10:08:41,082 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 10:08:41,083 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 10:08:41,083 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 10:08:41,088 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 10:08:41,100 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 10:08:41,100 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 10:08:41,101 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 10:08:41,101 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 10:08:41,102 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 10:08:41,102 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 10:08:41,102 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 10:08:41,102 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 10:08:41,102 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 10:08:41,102 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 10:08:41,103 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 10:08:41,103 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 10:08:41,103 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 10:08:41,103 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 10:08:41,103 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 10:08:41,103 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 10:08:41,103 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 10:08:41,103 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 10:08:41,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 10:08:41,103 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 10:08:41,103 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 10:08:41,104 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 10:08:41,104 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 10:08:41,278 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 10:08:41,296 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 10:08:41,298 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 10:08:41,298 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 10:08:41,299 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 10:08:41,300 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-patterns/array15_pattern.c [2022-01-31 10:08:41,352 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/431550d15/fd126bfe20584a8c92ca1ff5367eee51/FLAG673c241d0 [2022-01-31 10:08:41,695 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 10:08:41,696 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-patterns/array15_pattern.c [2022-01-31 10:08:41,700 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/431550d15/fd126bfe20584a8c92ca1ff5367eee51/FLAG673c241d0 [2022-01-31 10:08:41,708 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/431550d15/fd126bfe20584a8c92ca1ff5367eee51 [2022-01-31 10:08:41,710 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 10:08:41,711 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 10:08:41,712 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 10:08:41,712 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 10:08:41,714 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 10:08:41,715 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 10:08:41" (1/1) ... [2022-01-31 10:08:41,716 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@795ef7f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:08:41, skipping insertion in model container [2022-01-31 10:08:41,716 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 10:08:41" (1/1) ... [2022-01-31 10:08:41,720 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 10:08:41,730 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 10:08:41,903 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-patterns/array15_pattern.c[1424,1437] [2022-01-31 10:08:41,934 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 10:08:41,942 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 10:08:41,952 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-patterns/array15_pattern.c[1424,1437] [2022-01-31 10:08:41,974 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 10:08:41,986 INFO L208 MainTranslator]: Completed translation [2022-01-31 10:08:41,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:08:41 WrapperNode [2022-01-31 10:08:41,986 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 10:08:41,987 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 10:08:41,987 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 10:08:41,988 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 10:08:41,996 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:08:41" (1/1) ... [2022-01-31 10:08:41,996 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:08:41" (1/1) ... [2022-01-31 10:08:42,006 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:08:41" (1/1) ... [2022-01-31 10:08:42,006 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:08:41" (1/1) ... [2022-01-31 10:08:42,018 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:08:41" (1/1) ... [2022-01-31 10:08:42,021 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:08:41" (1/1) ... [2022-01-31 10:08:42,022 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:08:41" (1/1) ... [2022-01-31 10:08:42,023 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 10:08:42,024 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 10:08:42,024 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 10:08:42,024 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 10:08:42,026 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:08:41" (1/1) ... [2022-01-31 10:08:42,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 10:08:42,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:08:42,048 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 10:08:42,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 10:08:42,075 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 10:08:42,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 10:08:42,076 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 10:08:42,076 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 10:08:42,076 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 10:08:42,077 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 10:08:42,077 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 10:08:42,077 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 10:08:42,077 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 10:08:42,077 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 10:08:42,078 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 10:08:42,078 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 10:08:42,078 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 10:08:42,078 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-01-31 10:08:42,078 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 10:08:42,079 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 10:08:42,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 10:08:42,079 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 10:08:42,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 10:08:42,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 10:08:42,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 10:08:42,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 10:08:42,149 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 10:08:42,151 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 10:08:42,322 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 10:08:42,329 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 10:08:42,330 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-01-31 10:08:42,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:08:42 BoogieIcfgContainer [2022-01-31 10:08:42,331 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 10:08:42,331 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 10:08:42,331 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 10:08:42,333 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 10:08:42,340 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:08:42" (1/1) ... [2022-01-31 10:08:42,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 10:08:42 BasicIcfg [2022-01-31 10:08:42,362 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 10:08:42,363 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 10:08:42,363 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 10:08:42,365 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 10:08:42,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 10:08:41" (1/4) ... [2022-01-31 10:08:42,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7842f9ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 10:08:42, skipping insertion in model container [2022-01-31 10:08:42,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:08:41" (2/4) ... [2022-01-31 10:08:42,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7842f9ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 10:08:42, skipping insertion in model container [2022-01-31 10:08:42,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:08:42" (3/4) ... [2022-01-31 10:08:42,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7842f9ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 10:08:42, skipping insertion in model container [2022-01-31 10:08:42,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 10:08:42" (4/4) ... [2022-01-31 10:08:42,366 INFO L111 eAbstractionObserver]: Analyzing ICFG array15_pattern.cJordan [2022-01-31 10:08:42,370 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 10:08:42,370 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 10:08:42,408 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 10:08:42,414 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 10:08:42,415 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 10:08:42,426 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 29 states have internal predecessors, (43), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 10:08:42,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 10:08:42,431 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:08:42,432 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 10:08:42,432 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:08:42,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:08:42,436 INFO L85 PathProgramCache]: Analyzing trace with hash 925692837, now seen corresponding path program 1 times [2022-01-31 10:08:42,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:08:42,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832625653] [2022-01-31 10:08:42,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:08:42,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:08:42,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:08:42,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 10:08:42,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:08:42,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 10:08:42,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:08:42,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 10:08:42,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:08:42,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832625653] [2022-01-31 10:08:42,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832625653] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 10:08:42,615 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 10:08:42,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 10:08:42,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458022884] [2022-01-31 10:08:42,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 10:08:42,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 10:08:42,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:08:42,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 10:08:42,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 10:08:42,644 INFO L87 Difference]: Start difference. First operand has 40 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 29 states have internal predecessors, (43), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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 10:08:42,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:08:42,724 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2022-01-31 10:08:42,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 10:08:42,726 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 10:08:42,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:08:42,730 INFO L225 Difference]: With dead ends: 40 [2022-01-31 10:08:42,733 INFO L226 Difference]: Without dead ends: 33 [2022-01-31 10:08:42,734 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 10:08:42,738 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:08:42,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 51 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:08:42,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-31 10:08:42,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-01-31 10:08:42,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 6 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 10:08:42,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2022-01-31 10:08:42,768 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 20 [2022-01-31 10:08:42,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:08:42,769 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2022-01-31 10:08:42,769 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 10:08:42,770 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2022-01-31 10:08:42,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 10:08:42,771 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:08:42,771 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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 10:08:42,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 10:08:42,772 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:08:42,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:08:42,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1408601206, now seen corresponding path program 1 times [2022-01-31 10:08:42,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:08:42,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766561552] [2022-01-31 10:08:42,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:08:42,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:08:42,805 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:08:42,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1179512713] [2022-01-31 10:08:42,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:08:42,806 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:08:42,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:08:42,808 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:08:42,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 10:08:42,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:08:42,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 10:08:42,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:08:43,042 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:08:43,042 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 10:08:43,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:08:43,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766561552] [2022-01-31 10:08:43,043 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:08:43,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179512713] [2022-01-31 10:08:43,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179512713] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 10:08:43,043 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 10:08:43,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 10:08:43,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178562907] [2022-01-31 10:08:43,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 10:08:43,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 10:08:43,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:08:43,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 10:08:43,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-31 10:08:43,045 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 10:08:43,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:08:43,137 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2022-01-31 10:08:43,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 10:08:43,138 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2022-01-31 10:08:43,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:08:43,141 INFO L225 Difference]: With dead ends: 45 [2022-01-31 10:08:43,141 INFO L226 Difference]: Without dead ends: 45 [2022-01-31 10:08:43,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-01-31 10:08:43,142 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 48 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:08:43,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 76 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:08:43,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-01-31 10:08:43,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2022-01-31 10:08:43,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 10:08:43,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2022-01-31 10:08:43,148 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 34 [2022-01-31 10:08:43,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:08:43,148 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2022-01-31 10:08:43,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 10:08:43,148 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2022-01-31 10:08:43,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 10:08:43,149 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:08:43,149 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2022-01-31 10:08:43,169 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 10:08:43,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:08:43,367 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:08:43,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:08:43,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1268215069, now seen corresponding path program 1 times [2022-01-31 10:08:43,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:08:43,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403417408] [2022-01-31 10:08:43,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:08:43,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:08:43,377 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:08:43,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [136721053] [2022-01-31 10:08:43,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:08:43,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:08:43,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:08:43,379 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:08:43,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 10:08:43,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:08:43,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 10:08:43,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:08:43,515 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 10:08:43,516 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 10:08:43,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:08:43,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403417408] [2022-01-31 10:08:43,517 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:08:43,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136721053] [2022-01-31 10:08:43,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136721053] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 10:08:43,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 10:08:43,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 10:08:43,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426880180] [2022-01-31 10:08:43,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 10:08:43,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 10:08:43,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:08:43,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 10:08:43,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 10:08:43,520 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (6), 2 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 10:08:43,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:08:43,554 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2022-01-31 10:08:43,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 10:08:43,555 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (6), 2 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 40 [2022-01-31 10:08:43,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:08:43,557 INFO L225 Difference]: With dead ends: 43 [2022-01-31 10:08:43,558 INFO L226 Difference]: Without dead ends: 43 [2022-01-31 10:08:43,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 10:08:43,560 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 21 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 10:08:43,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 69 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 10:08:43,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-31 10:08:43,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2022-01-31 10:08:43,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 31 states have internal predecessors, (37), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 10:08:43,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2022-01-31 10:08:43,571 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 40 [2022-01-31 10:08:43,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:08:43,572 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2022-01-31 10:08:43,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (6), 2 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 10:08:43,572 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2022-01-31 10:08:43,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 10:08:43,573 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:08:43,573 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:08:43,592 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-31 10:08:43,773 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,SelfDestructingSolverStorable2 [2022-01-31 10:08:43,774 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:08:43,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:08:43,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1333541960, now seen corresponding path program 1 times [2022-01-31 10:08:43,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:08:43,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383037082] [2022-01-31 10:08:43,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:08:43,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:08:43,787 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:08:43,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2141674426] [2022-01-31 10:08:43,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:08:43,788 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:08:43,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:08:43,789 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:08:43,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 10:08:43,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:08:43,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-31 10:08:43,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:08:44,134 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 10:08:44,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:08:44,488 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 10:08:44,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:08:44,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383037082] [2022-01-31 10:08:44,489 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:08:44,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141674426] [2022-01-31 10:08:44,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141674426] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:08:44,489 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:08:44,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2022-01-31 10:08:44,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195404628] [2022-01-31 10:08:44,490 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:08:44,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 10:08:44,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:08:44,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 10:08:44,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2022-01-31 10:08:44,491 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 20 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 15 states have internal predecessors, (42), 5 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 10:08:44,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:08:44,900 INFO L93 Difference]: Finished difference Result 92 states and 106 transitions. [2022-01-31 10:08:44,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 10:08:44,900 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 15 states have internal predecessors, (42), 5 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 44 [2022-01-31 10:08:44,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:08:44,902 INFO L225 Difference]: With dead ends: 92 [2022-01-31 10:08:44,902 INFO L226 Difference]: Without dead ends: 92 [2022-01-31 10:08:44,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2022-01-31 10:08:44,903 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 68 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:08:44,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 258 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 10:08:44,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-01-31 10:08:44,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2022-01-31 10:08:44,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 50 states have (on average 1.2) internal successors, (60), 51 states have internal predecessors, (60), 9 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 10:08:44,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 76 transitions. [2022-01-31 10:08:44,909 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 76 transitions. Word has length 44 [2022-01-31 10:08:44,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:08:44,909 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 76 transitions. [2022-01-31 10:08:44,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 15 states have internal predecessors, (42), 5 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 10:08:44,909 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 76 transitions. [2022-01-31 10:08:44,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 10:08:44,910 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:08:44,910 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:08:44,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 10:08:45,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:08:45,127 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:08:45,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:08:45,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1839100585, now seen corresponding path program 1 times [2022-01-31 10:08:45,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:08:45,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237195918] [2022-01-31 10:08:45,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:08:45,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:08:45,147 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:08:45,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [439170439] [2022-01-31 10:08:45,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:08:45,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:08:45,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:08:45,148 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:08:45,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 10:08:45,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:08:45,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-31 10:08:45,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:08:45,320 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 0 case distinctions, treesize of input 37 treesize of output 32 [2022-01-31 10:08:45,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 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 30 [2022-01-31 10:08:45,532 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 0 case distinctions, treesize of input 120 treesize of output 109 [2022-01-31 10:08:45,587 INFO L353 Elim1Store]: treesize reduction 248, result has 27.3 percent of original size [2022-01-31 10:08:45,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 108 treesize of output 174 [2022-01-31 10:08:45,662 INFO L353 Elim1Store]: treesize reduction 31, result has 3.1 percent of original size [2022-01-31 10:08:45,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 37 [2022-01-31 10:08:45,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:08:45,690 INFO L353 Elim1Store]: treesize reduction 34, result has 37.0 percent of original size [2022-01-31 10:08:45,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 70 treesize of output 60 [2022-01-31 10:08:45,818 INFO L353 Elim1Store]: treesize reduction 53, result has 27.4 percent of original size [2022-01-31 10:08:45,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 117 treesize of output 79 [2022-01-31 10:08:45,893 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 40 treesize of output 28 [2022-01-31 10:08:45,963 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:08:45,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:08:46,258 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 56 treesize of output 52 [2022-01-31 10:08:46,269 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:08:46,270 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 59 [2022-01-31 10:08:46,290 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 32 treesize of output 19 [2022-01-31 10:08:46,309 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:08:46,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 47 [2022-01-31 10:08:46,340 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:08:46,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 71 [2022-01-31 10:08:46,712 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 10:08:46,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:08:46,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237195918] [2022-01-31 10:08:46,713 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:08:46,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439170439] [2022-01-31 10:08:46,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439170439] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:08:46,713 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:08:46,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2022-01-31 10:08:46,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429695732] [2022-01-31 10:08:46,713 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:08:46,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 10:08:46,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:08:46,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 10:08:46,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-01-31 10:08:46,714 INFO L87 Difference]: Start difference. First operand 65 states and 76 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-31 10:08:47,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:08:47,471 INFO L93 Difference]: Finished difference Result 96 states and 113 transitions. [2022-01-31 10:08:47,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 10:08:47,472 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 44 [2022-01-31 10:08:47,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:08:47,473 INFO L225 Difference]: With dead ends: 96 [2022-01-31 10:08:47,473 INFO L226 Difference]: Without dead ends: 93 [2022-01-31 10:08:47,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2022-01-31 10:08:47,474 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 47 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 10:08:47,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 272 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 260 Invalid, 0 Unknown, 26 Unchecked, 0.6s Time] [2022-01-31 10:08:47,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-01-31 10:08:47,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 82. [2022-01-31 10:08:47,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 64 states have (on average 1.203125) internal successors, (77), 65 states have internal predecessors, (77), 11 states have call successors, (11), 8 states have call predecessors, (11), 6 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 10:08:47,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 97 transitions. [2022-01-31 10:08:47,479 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 97 transitions. Word has length 44 [2022-01-31 10:08:47,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:08:47,480 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 97 transitions. [2022-01-31 10:08:47,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-31 10:08:47,480 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 97 transitions. [2022-01-31 10:08:47,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 10:08:47,481 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:08:47,481 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:08:47,503 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 10:08:47,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:08:47,695 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:08:47,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:08:47,696 INFO L85 PathProgramCache]: Analyzing trace with hash -960179311, now seen corresponding path program 2 times [2022-01-31 10:08:47,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:08:47,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312447283] [2022-01-31 10:08:47,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:08:47,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:08:47,705 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:08:47,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1728972126] [2022-01-31 10:08:47,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 10:08:47,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:08:47,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:08:47,706 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:08:47,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 10:08:47,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 10:08:47,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:08:47,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 10:08:47,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:08:47,839 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:08:47,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:08:47,922 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 10:08:47,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:08:47,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312447283] [2022-01-31 10:08:47,923 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:08:47,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728972126] [2022-01-31 10:08:47,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728972126] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:08:47,923 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:08:47,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-01-31 10:08:47,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878523257] [2022-01-31 10:08:47,923 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:08:47,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 10:08:47,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:08:47,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 10:08:47,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-31 10:08:47,924 INFO L87 Difference]: Start difference. First operand 82 states and 97 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 10:08:48,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:08:48,045 INFO L93 Difference]: Finished difference Result 120 states and 141 transitions. [2022-01-31 10:08:48,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 10:08:48,047 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 46 [2022-01-31 10:08:48,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:08:48,048 INFO L225 Difference]: With dead ends: 120 [2022-01-31 10:08:48,048 INFO L226 Difference]: Without dead ends: 120 [2022-01-31 10:08:48,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-01-31 10:08:48,048 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 95 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:08:48,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 146 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:08:48,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-01-31 10:08:48,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 95. [2022-01-31 10:08:48,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 77 states have (on average 1.1818181818181819) internal successors, (91), 78 states have internal predecessors, (91), 11 states have call successors, (11), 8 states have call predecessors, (11), 6 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 10:08:48,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 111 transitions. [2022-01-31 10:08:48,054 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 111 transitions. Word has length 46 [2022-01-31 10:08:48,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:08:48,054 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 111 transitions. [2022-01-31 10:08:48,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 10:08:48,054 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 111 transitions. [2022-01-31 10:08:48,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 10:08:48,055 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:08:48,055 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:08:48,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 10:08:48,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:08:48,276 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:08:48,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:08:48,276 INFO L85 PathProgramCache]: Analyzing trace with hash 295036563, now seen corresponding path program 2 times [2022-01-31 10:08:48,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:08:48,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467506867] [2022-01-31 10:08:48,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:08:48,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:08:48,284 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:08:48,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [978213801] [2022-01-31 10:08:48,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 10:08:48,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:08:48,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:08:48,288 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:08:48,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 10:08:48,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 10:08:48,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:08:48,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 10:08:48,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:08:48,414 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-31 10:08:48,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:08:48,490 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-31 10:08:48,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:08:48,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467506867] [2022-01-31 10:08:48,491 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:08:48,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978213801] [2022-01-31 10:08:48,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978213801] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:08:48,491 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:08:48,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-01-31 10:08:48,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882545623] [2022-01-31 10:08:48,492 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:08:48,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 10:08:48,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:08:48,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 10:08:48,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-01-31 10:08:48,493 INFO L87 Difference]: Start difference. First operand 95 states and 111 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 10:08:48,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:08:48,631 INFO L93 Difference]: Finished difference Result 125 states and 149 transitions. [2022-01-31 10:08:48,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 10:08:48,632 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 46 [2022-01-31 10:08:48,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:08:48,633 INFO L225 Difference]: With dead ends: 125 [2022-01-31 10:08:48,633 INFO L226 Difference]: Without dead ends: 125 [2022-01-31 10:08:48,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2022-01-31 10:08:48,634 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 40 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:08:48,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 161 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:08:48,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-01-31 10:08:48,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 109. [2022-01-31 10:08:48,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 91 states have (on average 1.1978021978021978) internal successors, (109), 92 states have internal predecessors, (109), 11 states have call successors, (11), 8 states have call predecessors, (11), 6 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 10:08:48,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 129 transitions. [2022-01-31 10:08:48,643 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 129 transitions. Word has length 46 [2022-01-31 10:08:48,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:08:48,644 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 129 transitions. [2022-01-31 10:08:48,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 10:08:48,644 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 129 transitions. [2022-01-31 10:08:48,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-31 10:08:48,645 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:08:48,645 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:08:48,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-31 10:08:48,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:08:48,867 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:08:48,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:08:48,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1553382405, now seen corresponding path program 3 times [2022-01-31 10:08:48,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:08:48,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537878230] [2022-01-31 10:08:48,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:08:48,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:08:48,874 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:08:48,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1250086021] [2022-01-31 10:08:48,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 10:08:48,874 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:08:48,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:08:48,876 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:08:48,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 10:08:48,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-31 10:08:48,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:08:48,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 10:08:48,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:08:49,048 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-31 10:08:49,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:08:49,133 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 10:08:49,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:08:49,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537878230] [2022-01-31 10:08:49,133 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:08:49,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250086021] [2022-01-31 10:08:49,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250086021] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:08:49,134 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:08:49,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-01-31 10:08:49,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790562684] [2022-01-31 10:08:49,134 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:08:49,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 10:08:49,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:08:49,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 10:08:49,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-31 10:08:49,135 INFO L87 Difference]: Start difference. First operand 109 states and 129 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 10:08:49,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:08:49,220 INFO L93 Difference]: Finished difference Result 162 states and 188 transitions. [2022-01-31 10:08:49,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 10:08:49,220 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 49 [2022-01-31 10:08:49,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:08:49,221 INFO L225 Difference]: With dead ends: 162 [2022-01-31 10:08:49,221 INFO L226 Difference]: Without dead ends: 138 [2022-01-31 10:08:49,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-01-31 10:08:49,222 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 61 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:08:49,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 150 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:08:49,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-01-31 10:08:49,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 111. [2022-01-31 10:08:49,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 93 states have (on average 1.1935483870967742) internal successors, (111), 94 states have internal predecessors, (111), 11 states have call successors, (11), 8 states have call predecessors, (11), 6 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 10:08:49,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 131 transitions. [2022-01-31 10:08:49,227 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 131 transitions. Word has length 49 [2022-01-31 10:08:49,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:08:49,227 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 131 transitions. [2022-01-31 10:08:49,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 10:08:49,227 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 131 transitions. [2022-01-31 10:08:49,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-31 10:08:49,228 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:08:49,228 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:08:49,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-31 10:08:49,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:08:49,431 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:08:49,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:08:49,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1114695770, now seen corresponding path program 3 times [2022-01-31 10:08:49,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:08:49,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568044772] [2022-01-31 10:08:49,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:08:49,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:08:49,441 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:08:49,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [171668609] [2022-01-31 10:08:49,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 10:08:49,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:08:49,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:08:49,442 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:08:49,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-31 10:08:49,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-31 10:08:49,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:08:49,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-31 10:08:49,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:08:49,661 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-31 10:08:49,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:08:49,931 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-01-31 10:08:49,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:08:49,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568044772] [2022-01-31 10:08:49,931 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:08:49,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171668609] [2022-01-31 10:08:49,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171668609] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:08:49,932 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:08:49,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2022-01-31 10:08:49,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529632983] [2022-01-31 10:08:49,934 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:08:49,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 10:08:49,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:08:49,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 10:08:49,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-01-31 10:08:49,935 INFO L87 Difference]: Start difference. First operand 111 states and 131 transitions. Second operand has 21 states, 19 states have (on average 2.526315789473684) internal successors, (48), 16 states have internal predecessors, (48), 4 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-31 10:08:50,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:08:50,226 INFO L93 Difference]: Finished difference Result 145 states and 171 transitions. [2022-01-31 10:08:50,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 10:08:50,226 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.526315789473684) internal successors, (48), 16 states have internal predecessors, (48), 4 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 53 [2022-01-31 10:08:50,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:08:50,227 INFO L225 Difference]: With dead ends: 145 [2022-01-31 10:08:50,227 INFO L226 Difference]: Without dead ends: 145 [2022-01-31 10:08:50,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=263, Invalid=859, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 10:08:50,228 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 119 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:08:50,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 239 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:08:50,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-01-31 10:08:50,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 95. [2022-01-31 10:08:50,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 80 states have (on average 1.1875) internal successors, (95), 81 states have internal predecessors, (95), 9 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 10:08:50,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 111 transitions. [2022-01-31 10:08:50,232 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 111 transitions. Word has length 53 [2022-01-31 10:08:50,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:08:50,232 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 111 transitions. [2022-01-31 10:08:50,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.526315789473684) internal successors, (48), 16 states have internal predecessors, (48), 4 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-31 10:08:50,233 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 111 transitions. [2022-01-31 10:08:50,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 10:08:50,233 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:08:50,233 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:08:50,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-31 10:08:50,439 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,SelfDestructingSolverStorable8 [2022-01-31 10:08:50,440 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:08:50,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:08:50,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1504182025, now seen corresponding path program 4 times [2022-01-31 10:08:50,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:08:50,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146530758] [2022-01-31 10:08:50,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:08:50,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:08:50,448 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:08:50,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [793125748] [2022-01-31 10:08:50,448 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 10:08:50,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:08:50,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:08:50,449 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:08:50,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-31 10:08:50,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 10:08:50,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:08:50,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 10:08:50,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:08:50,587 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 10:08:50,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:08:50,669 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-31 10:08:50,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:08:50,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146530758] [2022-01-31 10:08:50,670 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:08:50,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793125748] [2022-01-31 10:08:50,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793125748] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:08:50,670 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:08:50,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-01-31 10:08:50,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996538893] [2022-01-31 10:08:50,670 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:08:50,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 10:08:50,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:08:50,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 10:08:50,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-31 10:08:50,671 INFO L87 Difference]: Start difference. First operand 95 states and 111 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 10:08:50,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:08:50,783 INFO L93 Difference]: Finished difference Result 106 states and 120 transitions. [2022-01-31 10:08:50,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 10:08:50,783 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 54 [2022-01-31 10:08:50,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:08:50,784 INFO L225 Difference]: With dead ends: 106 [2022-01-31 10:08:50,784 INFO L226 Difference]: Without dead ends: 75 [2022-01-31 10:08:50,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-01-31 10:08:50,784 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 58 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:08:50,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 129 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:08:50,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-01-31 10:08:50,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 66. [2022-01-31 10:08:50,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 56 states have (on average 1.1964285714285714) internal successors, (67), 56 states have internal predecessors, (67), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 10:08:50,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2022-01-31 10:08:50,787 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 54 [2022-01-31 10:08:50,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:08:50,787 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2022-01-31 10:08:50,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 10:08:50,788 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2022-01-31 10:08:50,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 10:08:50,788 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:08:50,788 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 10:08:50,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-31 10:08:51,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-31 10:08:51,001 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:08:51,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:08:51,002 INFO L85 PathProgramCache]: Analyzing trace with hash 689851158, now seen corresponding path program 4 times [2022-01-31 10:08:51,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:08:51,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126349707] [2022-01-31 10:08:51,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:08:51,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:08:51,011 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:08:51,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [711069604] [2022-01-31 10:08:51,011 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 10:08:51,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:08:51,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:08:51,012 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:08:51,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-31 10:08:51,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 10:08:51,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:08:51,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 10:08:51,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:08:51,131 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-31 10:08:51,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:08:51,220 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-31 10:08:51,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:08:51,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126349707] [2022-01-31 10:08:51,220 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:08:51,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711069604] [2022-01-31 10:08:51,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711069604] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:08:51,220 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:08:51,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-01-31 10:08:51,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147310019] [2022-01-31 10:08:51,221 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:08:51,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 10:08:51,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:08:51,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 10:08:51,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-01-31 10:08:51,222 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-31 10:08:51,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:08:51,303 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2022-01-31 10:08:51,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 10:08:51,303 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 58 [2022-01-31 10:08:51,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:08:51,304 INFO L225 Difference]: With dead ends: 68 [2022-01-31 10:08:51,304 INFO L226 Difference]: Without dead ends: 66 [2022-01-31 10:08:51,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2022-01-31 10:08:51,304 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 46 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:08:51,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 92 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:08:51,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-31 10:08:51,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2022-01-31 10:08:51,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 51 states have internal predecessors, (60), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 10:08:51,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2022-01-31 10:08:51,324 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 58 [2022-01-31 10:08:51,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:08:51,324 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2022-01-31 10:08:51,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-31 10:08:51,324 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2022-01-31 10:08:51,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 10:08:51,325 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:08:51,325 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2022-01-31 10:08:51,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-31 10:08:51,525 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,SelfDestructingSolverStorable10 [2022-01-31 10:08:51,526 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:08:51,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:08:51,526 INFO L85 PathProgramCache]: Analyzing trace with hash 220747996, now seen corresponding path program 5 times [2022-01-31 10:08:51,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:08:51,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281270892] [2022-01-31 10:08:51,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:08:51,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:08:51,535 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:08:51,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1148771396] [2022-01-31 10:08:51,535 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 10:08:51,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:08:51,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:08:51,537 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:08:51,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-31 10:08:52,752 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-01-31 10:08:52,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:08:52,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 10:08:52,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:08:52,858 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 20 proven. 17 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-01-31 10:08:52,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:08:52,971 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-31 10:08:52,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:08:52,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281270892] [2022-01-31 10:08:52,972 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:08:52,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148771396] [2022-01-31 10:08:52,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148771396] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:08:52,972 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:08:52,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-01-31 10:08:52,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147280548] [2022-01-31 10:08:52,972 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:08:52,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 10:08:52,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:08:52,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 10:08:52,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-31 10:08:52,973 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 10:08:53,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:08:53,128 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2022-01-31 10:08:53,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 10:08:53,128 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 60 [2022-01-31 10:08:53,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:08:53,129 INFO L225 Difference]: With dead ends: 62 [2022-01-31 10:08:53,129 INFO L226 Difference]: Without dead ends: 62 [2022-01-31 10:08:53,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2022-01-31 10:08:53,130 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 35 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:08:53,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 157 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:08:53,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-01-31 10:08:53,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2022-01-31 10:08:53,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 49 states have (on average 1.163265306122449) internal successors, (57), 49 states have internal predecessors, (57), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 10:08:53,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2022-01-31 10:08:53,133 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 60 [2022-01-31 10:08:53,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:08:53,134 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2022-01-31 10:08:53,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 10:08:53,135 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2022-01-31 10:08:53,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 10:08:53,135 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:08:53,135 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1] [2022-01-31 10:08:53,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-31 10:08:53,341 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,SelfDestructingSolverStorable11 [2022-01-31 10:08:53,341 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:08:53,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:08:53,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1425616426, now seen corresponding path program 6 times [2022-01-31 10:08:53,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:08:53,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141575688] [2022-01-31 10:08:53,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:08:53,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:08:53,354 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:08:53,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [603714820] [2022-01-31 10:08:53,354 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 10:08:53,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:08:53,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:08:53,358 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:08:53,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-31 10:08:53,895 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-01-31 10:08:53,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:08:53,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 77 conjunts are in the unsatisfiable core [2022-01-31 10:08:53,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:08:53,965 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 0 case distinctions, treesize of input 55 treesize of output 50 [2022-01-31 10:08:53,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 18 treesize of output 17 [2022-01-31 10:08:53,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 16 treesize of output 15 [2022-01-31 10:08:54,023 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 0 case distinctions, treesize of input 76 treesize of output 69 [2022-01-31 10:08:54,040 INFO L353 Elim1Store]: treesize reduction 124, result has 17.9 percent of original size [2022-01-31 10:08:54,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 68 treesize of output 88 [2022-01-31 10:08:54,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:08:54,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 7 [2022-01-31 10:08:54,082 INFO L353 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-01-31 10:08:54,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 7 [2022-01-31 10:08:54,293 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 0 case distinctions, treesize of input 79 treesize of output 70 [2022-01-31 10:08:54,322 INFO L353 Elim1Store]: treesize reduction 188, result has 13.4 percent of original size [2022-01-31 10:08:54,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 69 treesize of output 93 [2022-01-31 10:08:54,351 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:08:54,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:08:54,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:08:54,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:08:54,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 21 [2022-01-31 10:08:54,490 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 0 case distinctions, treesize of input 82 treesize of output 71 [2022-01-31 10:08:54,533 INFO L353 Elim1Store]: treesize reduction 272, result has 15.8 percent of original size [2022-01-31 10:08:54,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 70 treesize of output 108 [2022-01-31 10:08:54,569 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:08:54,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:08:54,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:08:54,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:08:54,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:08:54,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:08:54,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:08:54,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 20 [2022-01-31 10:09:13,904 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 0 case distinctions, treesize of input 106 treesize of output 93 [2022-01-31 10:09:14,419 INFO L353 Elim1Store]: treesize reduction 437, result has 24.7 percent of original size [2022-01-31 10:09:14,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 92 treesize of output 213 [2022-01-31 10:09:14,745 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:09:16,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:09:16,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:09:16,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:09:16,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:09:16,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:09:16,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:09:16,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:09:16,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:09:16,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:09:16,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:09:16,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:09:16,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:09:16,760 INFO L353 Elim1Store]: treesize reduction 19, result has 72.1 percent of original size [2022-01-31 10:09:16,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 366 treesize of output 334 [2022-01-31 10:09:49,883 INFO L353 Elim1Store]: treesize reduction 773, result has 10.6 percent of original size [2022-01-31 10:09:49,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 203 treesize of output 172 [2022-01-31 10:09:51,253 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 48 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:09:51,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:09:58,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:09:58,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141575688] [2022-01-31 10:09:58,437 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:09:58,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603714820] [2022-01-31 10:09:58,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603714820] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:09:58,437 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 10:09:58,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2022-01-31 10:09:58,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745601542] [2022-01-31 10:09:58,437 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 10:09:58,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 10:09:58,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:09:58,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 10:09:58,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=2873, Unknown=14, NotChecked=0, Total=3306 [2022-01-31 10:09:58,439 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 38 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 34 states have internal predecessors, (49), 5 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 10:10:03,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:10:03,242 INFO L93 Difference]: Finished difference Result 100 states and 117 transitions. [2022-01-31 10:10:03,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 10:10:03,243 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 34 states have internal predecessors, (49), 5 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 62 [2022-01-31 10:10:03,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:10:03,243 INFO L225 Difference]: With dead ends: 100 [2022-01-31 10:10:03,243 INFO L226 Difference]: Without dead ends: 97 [2022-01-31 10:10:03,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1580 ImplicationChecksByTransitivity, 54.5s TimeCoverageRelationStatistics Valid=477, Invalid=3289, Unknown=16, NotChecked=0, Total=3782 [2022-01-31 10:10:03,244 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 9 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 369 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:10:03,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 486 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 68 Invalid, 0 Unknown, 369 Unchecked, 0.1s Time] [2022-01-31 10:10:03,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-01-31 10:10:03,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 91. [2022-01-31 10:10:03,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 10:10:03,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2022-01-31 10:10:03,247 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 62 [2022-01-31 10:10:03,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:10:03,247 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2022-01-31 10:10:03,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 34 states have internal predecessors, (49), 5 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 10:10:03,247 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2022-01-31 10:10:03,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 10:10:03,248 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:10:03,248 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1] [2022-01-31 10:10:03,267 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 10:10:03,468 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,SelfDestructingSolverStorable12 [2022-01-31 10:10:03,468 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:10:03,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:10:03,469 INFO L85 PathProgramCache]: Analyzing trace with hash -180851945, now seen corresponding path program 5 times [2022-01-31 10:10:03,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:10:03,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479054261] [2022-01-31 10:10:03,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:10:03,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:10:03,482 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:10:03,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1299097171] [2022-01-31 10:10:03,482 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 10:10:03,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:10:03,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:10:03,483 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:10:03,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-31 10:10:03,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-01-31 10:10:03,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:10:03,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 62 conjunts are in the unsatisfiable core [2022-01-31 10:10:03,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:10:04,036 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 0 case distinctions, treesize of input 61 treesize of output 56 [2022-01-31 10:10:04,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 59 [2022-01-31 10:10:04,046 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 31 treesize of output 16 [2022-01-31 10:10:04,075 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 50 treesize of output 24 [2022-01-31 10:10:04,140 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 0 case distinctions, treesize of input 80 treesize of output 73 [2022-01-31 10:10:04,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:04,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:04,144 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:10:04,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 98 [2022-01-31 10:10:04,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:04,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 21 [2022-01-31 10:10:04,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:04,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 26 [2022-01-31 10:10:04,347 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 0 case distinctions, treesize of input 77 treesize of output 68 [2022-01-31 10:10:04,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:04,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:04,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:04,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:04,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:04,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:04,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 89 [2022-01-31 10:10:04,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:04,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:04,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:04,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 16 [2022-01-31 10:10:04,480 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 0 case distinctions, treesize of input 88 treesize of output 77 [2022-01-31 10:10:04,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:04,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:04,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:04,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:04,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:04,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:04,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:04,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:04,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:04,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:04,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 114 [2022-01-31 10:10:04,521 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:10:04,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:04,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:04,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:04,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:04,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:04,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:04,567 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 54 [2022-01-31 10:10:05,347 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 0 case distinctions, treesize of input 138 treesize of output 121 [2022-01-31 10:10:05,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:05,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:05,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:05,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:05,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:05,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:06,129 INFO L353 Elim1Store]: treesize reduction 503, result has 26.1 percent of original size [2022-01-31 10:10:06,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 13 case distinctions, treesize of input 120 treesize of output 248 [2022-01-31 10:10:07,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:07,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:07,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:07,322 INFO L353 Elim1Store]: treesize reduction 254, result has 0.4 percent of original size [2022-01-31 10:10:07,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 152 treesize of output 83 [2022-01-31 10:10:08,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:08,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:08,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:10:08,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:08,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:08,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:08,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:08,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:08,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:08,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:08,221 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:10:08,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 94 treesize of output 43 [2022-01-31 10:10:08,319 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 10:10:08,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:10:11,935 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_main_~column~0_100 Int)) (or (< (+ v_main_~column~0_100 1) c_~ARR_SIZE~0) (let ((.cse8 (mod c_~ARR_SIZE~0 4294967296))) (let ((.cse0 (<= .cse8 2147483647)) (.cse3 (+ (* v_main_~column~0_100 4) |c_main_~#array~0.offset|)) (.cse4 (select |c_#memory_int| |c_main_~#array~0.base|)) (.cse5 (* c_main_~index2~0 4)) (.cse2 (* .cse8 4)) (.cse6 (* c_~ARR_SIZE~0 2))) (and (or (not .cse0) (<= (let ((.cse1 (store .cse4 (+ .cse5 |c_main_~#array~0.offset| (* c_main_~index1~0 .cse2)) |c_main_#t~ite10|))) (+ 2 (select .cse1 (+ |c_main_~#array~0.offset| .cse2 4)) (select .cse1 |c_main_~#array~0.offset|) (select .cse1 (+ |c_main_~#array~0.offset| .cse2)) (select .cse1 .cse3) c_main_~sum~0)) .cse6)) (or .cse0 (<= (let ((.cse7 (store .cse4 (+ .cse5 (* (+ (- 17179869184) .cse2) c_main_~index1~0) |c_main_~#array~0.offset|) |c_main_#t~ite10|))) (+ (select .cse7 (+ |c_main_~#array~0.offset| .cse2 (- 17179869180))) (select .cse7 .cse3) 2 (select .cse7 |c_main_~#array~0.offset|) c_main_~sum~0 (select .cse7 (+ (- 17179869184) |c_main_~#array~0.offset| .cse2)))) .cse6))))) (not (< v_main_~column~0_100 c_~ARR_SIZE~0)))) is different from false [2022-01-31 10:10:12,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:10:12,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479054261] [2022-01-31 10:10:12,210 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:10:12,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299097171] [2022-01-31 10:10:12,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299097171] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:10:12,210 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 10:10:12,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2022-01-31 10:10:12,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022546471] [2022-01-31 10:10:12,211 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 10:10:12,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 10:10:12,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:10:12,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 10:10:12,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1271, Unknown=1, NotChecked=74, Total=1560 [2022-01-31 10:10:12,212 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 3 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 10:10:12,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:10:12,669 INFO L93 Difference]: Finished difference Result 142 states and 167 transitions. [2022-01-31 10:10:12,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 10:10:12,670 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 3 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 62 [2022-01-31 10:10:12,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:10:12,670 INFO L225 Difference]: With dead ends: 142 [2022-01-31 10:10:12,670 INFO L226 Difference]: Without dead ends: 139 [2022-01-31 10:10:12,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 41 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=240, Invalid=1485, Unknown=1, NotChecked=80, Total=1806 [2022-01-31 10:10:12,671 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 25 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 159 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 10:10:12,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 374 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 245 Invalid, 0 Unknown, 159 Unchecked, 0.3s Time] [2022-01-31 10:10:12,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-01-31 10:10:12,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 122. [2022-01-31 10:10:12,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 103 states have (on average 1.1941747572815533) internal successors, (123), 103 states have internal predecessors, (123), 12 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 10:10:12,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 145 transitions. [2022-01-31 10:10:12,674 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 145 transitions. Word has length 62 [2022-01-31 10:10:12,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:10:12,675 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 145 transitions. [2022-01-31 10:10:12,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 26 states have internal predecessors, (49), 3 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 10:10:12,675 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 145 transitions. [2022-01-31 10:10:12,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 10:10:12,675 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:10:12,675 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 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, 1, 1, 1] [2022-01-31 10:10:12,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-31 10:10:12,887 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,SelfDestructingSolverStorable13 [2022-01-31 10:10:12,887 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:10:12,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:10:12,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1261106256, now seen corresponding path program 7 times [2022-01-31 10:10:12,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:10:12,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358921872] [2022-01-31 10:10:12,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:10:12,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:10:12,895 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:10:12,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1311966235] [2022-01-31 10:10:12,895 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 10:10:12,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:10:12,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:10:12,899 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:10:12,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-31 10:10:12,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:10:12,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 10:10:12,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:10:13,089 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 40 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-31 10:10:13,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:10:13,193 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 19 proven. 30 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-01-31 10:10:13,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:10:13,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358921872] [2022-01-31 10:10:13,194 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:10:13,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311966235] [2022-01-31 10:10:13,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311966235] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:10:13,194 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:10:13,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-01-31 10:10:13,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450085524] [2022-01-31 10:10:13,194 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:10:13,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 10:10:13,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:10:13,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 10:10:13,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-01-31 10:10:13,195 INFO L87 Difference]: Start difference. First operand 122 states and 145 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 10:10:13,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:10:13,352 INFO L93 Difference]: Finished difference Result 191 states and 225 transitions. [2022-01-31 10:10:13,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 10:10:13,352 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 64 [2022-01-31 10:10:13,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:10:13,353 INFO L225 Difference]: With dead ends: 191 [2022-01-31 10:10:13,353 INFO L226 Difference]: Without dead ends: 191 [2022-01-31 10:10:13,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-01-31 10:10:13,354 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 123 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:10:13,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 164 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:10:13,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-01-31 10:10:13,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 156. [2022-01-31 10:10:13,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 134 states have (on average 1.1791044776119404) internal successors, (158), 134 states have internal predecessors, (158), 14 states have call successors, (14), 9 states have call predecessors, (14), 7 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-01-31 10:10:13,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 184 transitions. [2022-01-31 10:10:13,357 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 184 transitions. Word has length 64 [2022-01-31 10:10:13,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:10:13,358 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 184 transitions. [2022-01-31 10:10:13,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 10:10:13,358 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 184 transitions. [2022-01-31 10:10:13,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 10:10:13,358 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:10:13,358 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 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, 1, 1, 1] [2022-01-31 10:10:13,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-31 10:10:13,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:10:13,567 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:10:13,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:10:13,568 INFO L85 PathProgramCache]: Analyzing trace with hash -2021151438, now seen corresponding path program 6 times [2022-01-31 10:10:13,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:10:13,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616300625] [2022-01-31 10:10:13,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:10:13,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:10:13,575 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:10:13,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [187635038] [2022-01-31 10:10:13,576 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 10:10:13,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:10:13,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:10:13,580 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:10:13,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-31 10:10:13,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-01-31 10:10:13,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:10:13,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 10:10:13,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:10:13,906 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 14 proven. 35 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-01-31 10:10:13,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:10:14,016 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-31 10:10:14,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:10:14,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616300625] [2022-01-31 10:10:14,017 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:10:14,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187635038] [2022-01-31 10:10:14,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187635038] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:10:14,017 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:10:14,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-01-31 10:10:14,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503556926] [2022-01-31 10:10:14,018 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:10:14,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 10:10:14,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:10:14,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 10:10:14,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-01-31 10:10:14,019 INFO L87 Difference]: Start difference. First operand 156 states and 184 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 10:10:14,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:10:14,282 INFO L93 Difference]: Finished difference Result 243 states and 280 transitions. [2022-01-31 10:10:14,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 10:10:14,283 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 64 [2022-01-31 10:10:14,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:10:14,284 INFO L225 Difference]: With dead ends: 243 [2022-01-31 10:10:14,284 INFO L226 Difference]: Without dead ends: 243 [2022-01-31 10:10:14,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2022-01-31 10:10:14,285 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 49 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:10:14,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 188 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:10:14,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-01-31 10:10:14,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 167. [2022-01-31 10:10:14,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 145 states have (on average 1.1793103448275861) internal successors, (171), 145 states have internal predecessors, (171), 14 states have call successors, (14), 9 states have call predecessors, (14), 7 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-01-31 10:10:14,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 197 transitions. [2022-01-31 10:10:14,289 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 197 transitions. Word has length 64 [2022-01-31 10:10:14,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:10:14,289 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 197 transitions. [2022-01-31 10:10:14,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 10:10:14,289 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 197 transitions. [2022-01-31 10:10:14,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 10:10:14,290 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:10:14,290 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 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, 1, 1, 1] [2022-01-31 10:10:14,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-31 10:10:14,490 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,SelfDestructingSolverStorable15 [2022-01-31 10:10:14,490 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:10:14,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:10:14,491 INFO L85 PathProgramCache]: Analyzing trace with hash 79990112, now seen corresponding path program 8 times [2022-01-31 10:10:14,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:10:14,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26247637] [2022-01-31 10:10:14,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:10:14,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:10:14,497 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:10:14,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [337141097] [2022-01-31 10:10:14,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 10:10:14,497 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:10:14,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:10:14,498 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:10:14,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-31 10:10:14,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 10:10:14,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:10:14,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 10:10:14,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:10:14,695 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 58 proven. 17 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-31 10:10:14,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:10:14,815 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-31 10:10:14,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:10:14,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26247637] [2022-01-31 10:10:14,816 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:10:14,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337141097] [2022-01-31 10:10:14,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337141097] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:10:14,816 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:10:14,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-01-31 10:10:14,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802594512] [2022-01-31 10:10:14,816 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:10:14,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 10:10:14,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:10:14,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 10:10:14,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-01-31 10:10:14,817 INFO L87 Difference]: Start difference. First operand 167 states and 197 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 10:10:15,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:10:15,015 INFO L93 Difference]: Finished difference Result 202 states and 230 transitions. [2022-01-31 10:10:15,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 10:10:15,015 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 69 [2022-01-31 10:10:15,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:10:15,016 INFO L225 Difference]: With dead ends: 202 [2022-01-31 10:10:15,016 INFO L226 Difference]: Without dead ends: 168 [2022-01-31 10:10:15,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2022-01-31 10:10:15,017 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 57 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:10:15,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 155 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:10:15,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-01-31 10:10:15,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 157. [2022-01-31 10:10:15,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 138 states have (on average 1.144927536231884) internal successors, (158), 138 states have internal predecessors, (158), 12 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 10:10:15,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 180 transitions. [2022-01-31 10:10:15,022 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 180 transitions. Word has length 69 [2022-01-31 10:10:15,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:10:15,022 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 180 transitions. [2022-01-31 10:10:15,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 10:10:15,022 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 180 transitions. [2022-01-31 10:10:15,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 10:10:15,023 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:10:15,023 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 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, 1, 1, 1] [2022-01-31 10:10:15,040 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-01-31 10:10:15,231 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,SelfDestructingSolverStorable16 [2022-01-31 10:10:15,231 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:10:15,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:10:15,232 INFO L85 PathProgramCache]: Analyzing trace with hash -988185367, now seen corresponding path program 9 times [2022-01-31 10:10:15,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:10:15,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622760095] [2022-01-31 10:10:15,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:10:15,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:10:15,238 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:10:15,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1358555881] [2022-01-31 10:10:15,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 10:10:15,239 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:10:15,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:10:15,240 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:10:15,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-31 10:10:15,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-01-31 10:10:15,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:10:15,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 10:10:15,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:10:15,765 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 25 proven. 48 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 10:10:15,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:10:15,888 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 17 proven. 48 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-01-31 10:10:15,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:10:15,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622760095] [2022-01-31 10:10:15,889 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:10:15,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358555881] [2022-01-31 10:10:15,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358555881] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:10:15,889 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:10:15,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-01-31 10:10:15,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213791278] [2022-01-31 10:10:15,889 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:10:15,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 10:10:15,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:10:15,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 10:10:15,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-01-31 10:10:15,890 INFO L87 Difference]: Start difference. First operand 157 states and 180 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 10:10:16,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:10:16,093 INFO L93 Difference]: Finished difference Result 252 states and 287 transitions. [2022-01-31 10:10:16,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 10:10:16,093 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 69 [2022-01-31 10:10:16,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:10:16,094 INFO L225 Difference]: With dead ends: 252 [2022-01-31 10:10:16,094 INFO L226 Difference]: Without dead ends: 218 [2022-01-31 10:10:16,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2022-01-31 10:10:16,095 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 62 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:10:16,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 229 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 10:10:16,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-01-31 10:10:16,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 150. [2022-01-31 10:10:16,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 131 states have (on average 1.1374045801526718) internal successors, (149), 131 states have internal predecessors, (149), 12 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 10:10:16,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 171 transitions. [2022-01-31 10:10:16,099 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 171 transitions. Word has length 69 [2022-01-31 10:10:16,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:10:16,099 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 171 transitions. [2022-01-31 10:10:16,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 10:10:16,099 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 171 transitions. [2022-01-31 10:10:16,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 10:10:16,100 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:10:16,100 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 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, 1, 1, 1] [2022-01-31 10:10:16,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-31 10:10:16,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-31 10:10:16,312 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:10:16,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:10:16,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1500560640, now seen corresponding path program 10 times [2022-01-31 10:10:16,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:10:16,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717396230] [2022-01-31 10:10:16,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:10:16,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:10:16,319 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:10:16,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [624982852] [2022-01-31 10:10:16,319 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 10:10:16,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:10:16,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:10:16,320 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:10:16,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-31 10:10:16,366 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 10:10:16,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:10:16,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 10:10:16,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:10:16,496 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 35 proven. 17 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-01-31 10:10:16,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:10:16,622 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 33 proven. 19 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-01-31 10:10:16,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:10:16,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717396230] [2022-01-31 10:10:16,623 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:10:16,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624982852] [2022-01-31 10:10:16,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624982852] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:10:16,623 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:10:16,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-01-31 10:10:16,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900589635] [2022-01-31 10:10:16,623 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:10:16,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 10:10:16,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:10:16,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 10:10:16,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-01-31 10:10:16,624 INFO L87 Difference]: Start difference. First operand 150 states and 171 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-31 10:10:16,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:10:16,856 INFO L93 Difference]: Finished difference Result 161 states and 181 transitions. [2022-01-31 10:10:16,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 10:10:16,856 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 73 [2022-01-31 10:10:16,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:10:16,857 INFO L225 Difference]: With dead ends: 161 [2022-01-31 10:10:16,857 INFO L226 Difference]: Without dead ends: 152 [2022-01-31 10:10:16,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=169, Invalid=383, Unknown=0, NotChecked=0, Total=552 [2022-01-31 10:10:16,858 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 88 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:10:16,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 161 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:10:16,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-01-31 10:10:16,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 136. [2022-01-31 10:10:16,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 117 states have (on average 1.1452991452991452) internal successors, (134), 117 states have internal predecessors, (134), 12 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 10:10:16,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 156 transitions. [2022-01-31 10:10:16,861 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 156 transitions. Word has length 73 [2022-01-31 10:10:16,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:10:16,861 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 156 transitions. [2022-01-31 10:10:16,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-01-31 10:10:16,861 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 156 transitions. [2022-01-31 10:10:16,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 10:10:16,862 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:10:16,862 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 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, 1] [2022-01-31 10:10:16,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-31 10:10:17,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:10:17,069 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:10:17,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:10:17,070 INFO L85 PathProgramCache]: Analyzing trace with hash 178012994, now seen corresponding path program 1 times [2022-01-31 10:10:17,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:10:17,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679197146] [2022-01-31 10:10:17,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:10:17,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:10:17,076 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:10:17,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1988287578] [2022-01-31 10:10:17,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:10:17,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:10:17,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:10:17,078 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:10:17,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-31 10:10:18,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:10:18,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 98 conjunts are in the unsatisfiable core [2022-01-31 10:10:18,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:10:18,309 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 0 case distinctions, treesize of input 61 treesize of output 56 [2022-01-31 10:10:18,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 21 treesize of output 20 [2022-01-31 10:10:18,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 19 treesize of output 18 [2022-01-31 10:10:18,393 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 0 case distinctions, treesize of input 80 treesize of output 73 [2022-01-31 10:10:18,408 INFO L353 Elim1Store]: treesize reduction 148, result has 19.1 percent of original size [2022-01-31 10:10:18,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 96 [2022-01-31 10:10:18,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:18,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 21 [2022-01-31 10:10:18,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:18,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 26 [2022-01-31 10:10:18,619 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 0 case distinctions, treesize of input 77 treesize of output 68 [2022-01-31 10:10:18,658 INFO L353 Elim1Store]: treesize reduction 174, result has 12.6 percent of original size [2022-01-31 10:10:18,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 67 treesize of output 89 [2022-01-31 10:10:18,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:18,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:18,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:18,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 19 [2022-01-31 10:10:18,780 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 0 case distinctions, treesize of input 80 treesize of output 69 [2022-01-31 10:10:18,829 INFO L353 Elim1Store]: treesize reduction 256, result has 15.5 percent of original size [2022-01-31 10:10:18,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 68 treesize of output 104 [2022-01-31 10:10:18,836 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:10:18,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:18,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:18,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:18,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:18,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:18,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:18,868 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 33 [2022-01-31 10:10:39,143 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 0 case distinctions, treesize of input 112 treesize of output 99 [2022-01-31 10:10:39,370 INFO L353 Elim1Store]: treesize reduction 469, result has 20.5 percent of original size [2022-01-31 10:10:39,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 98 treesize of output 199 [2022-01-31 10:10:39,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:39,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:39,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:39,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:39,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:39,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:39,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:39,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:39,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:39,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:39,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:10:39,639 INFO L353 Elim1Store]: treesize reduction 49, result has 50.0 percent of original size [2022-01-31 10:10:39,640 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 180 treesize of output 159 [2022-01-31 10:11:07,235 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 0 case distinctions, treesize of input 150 treesize of output 133 [2022-01-31 10:11:07,959 INFO L353 Elim1Store]: treesize reduction 1046, result has 13.5 percent of original size [2022-01-31 10:11:07,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 27 case distinctions, treesize of input 132 treesize of output 242 [2022-01-31 10:11:08,819 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:11:08,984 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:11:09,491 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:11:10,314 INFO L353 Elim1Store]: treesize reduction 463, result has 14.4 percent of original size [2022-01-31 10:11:10,315 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 502 treesize of output 410 [2022-01-31 10:11:42,933 INFO L353 Elim1Store]: treesize reduction 774, result has 16.0 percent of original size [2022-01-31 10:11:42,934 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 374 treesize of output 280 [2022-01-31 10:11:46,622 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 57 refuted. 16 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-31 10:11:46,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:11:58,791 WARN L860 $PredicateComparison]: unable to prove that (or (< 2 c_~ARR_SIZE~0) (let ((.cse9 (mod c_~ARR_SIZE~0 4294967296))) (let ((.cse3 (+ |c_main_~#array~0.offset| 4)) (.cse4 (select |c_#memory_int| |c_main_~#array~0.base|)) (.cse5 (* c_main_~index2~0 4)) (.cse2 (* .cse9 4)) (.cse6 (* c_main_~num~0 (* c_main_~num~0 (* c_main_~num~0 c_main_~num~0)))) (.cse7 (* c_~ARR_SIZE~0 2)) (.cse0 (<= .cse9 2147483647))) (and (or (not .cse0) (<= (let ((.cse1 (store .cse4 (+ .cse5 |c_main_~#array~0.offset| (* c_main_~index1~0 .cse2)) .cse6))) (+ (select .cse1 |c_main_~#array~0.offset|) (select .cse1 (+ |c_main_~#array~0.offset| .cse2 4)) 2 (select .cse1 .cse3) (select .cse1 (+ |c_main_~#array~0.offset| .cse2)) c_main_~sum~0)) .cse7)) (or (<= (let ((.cse8 (store .cse4 (+ .cse5 (* (+ (- 17179869184) .cse2) c_main_~index1~0) |c_main_~#array~0.offset|) .cse6))) (+ (select .cse8 |c_main_~#array~0.offset|) (select .cse8 (+ (- 17179869184) |c_main_~#array~0.offset| .cse2)) (select .cse8 .cse3) 2 (select .cse8 (+ |c_main_~#array~0.offset| .cse2 (- 17179869180))) c_main_~sum~0)) .cse7) .cse0)))) (let ((.cse10 (+ c_main_~index1~0 c_main_~index2~0))) (and (not (= c_~ARR_SIZE~0 .cse10)) (not (= (+ (- 2) c_~ARR_SIZE~0) .cse10))))) is different from true [2022-01-31 10:12:06,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:12:06,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679197146] [2022-01-31 10:12:06,070 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:12:06,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988287578] [2022-01-31 10:12:06,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988287578] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:12:06,070 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 10:12:06,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2022-01-31 10:12:06,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564824274] [2022-01-31 10:12:06,071 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 10:12:06,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 10:12:06,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:12:06,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 10:12:06,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=3659, Unknown=20, NotChecked=126, Total=4290 [2022-01-31 10:12:06,072 INFO L87 Difference]: Start difference. First operand 136 states and 156 transitions. Second operand has 46 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 38 states have internal predecessors, (57), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-31 10:12:17,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:12:17,592 INFO L93 Difference]: Finished difference Result 174 states and 198 transitions. [2022-01-31 10:12:17,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 10:12:17,593 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 38 states have internal predecessors, (57), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 77 [2022-01-31 10:12:17,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:12:17,594 INFO L225 Difference]: With dead ends: 174 [2022-01-31 10:12:17,594 INFO L226 Difference]: Without dead ends: 155 [2022-01-31 10:12:17,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2316 ImplicationChecksByTransitivity, 76.9s TimeCoverageRelationStatistics Valid=621, Invalid=5059, Unknown=24, NotChecked=148, Total=5852 [2022-01-31 10:12:17,595 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 76 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 1318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 842 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 10:12:17,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 532 Invalid, 1318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 454 Invalid, 0 Unknown, 842 Unchecked, 0.5s Time] [2022-01-31 10:12:17,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-01-31 10:12:17,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 147. [2022-01-31 10:12:17,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 125 states have (on average 1.144) internal successors, (143), 125 states have internal predecessors, (143), 14 states have call successors, (14), 9 states have call predecessors, (14), 7 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-01-31 10:12:17,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 169 transitions. [2022-01-31 10:12:17,599 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 169 transitions. Word has length 77 [2022-01-31 10:12:17,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:12:17,599 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 169 transitions. [2022-01-31 10:12:17,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 38 states have internal predecessors, (57), 6 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-31 10:12:17,599 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 169 transitions. [2022-01-31 10:12:17,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 10:12:17,600 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:12:17,600 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 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, 1, 1, 1] [2022-01-31 10:12:17,616 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 10:12:17,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:12:17,811 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:12:17,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:12:17,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1422777475, now seen corresponding path program 1 times [2022-01-31 10:12:17,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:12:17,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358001233] [2022-01-31 10:12:17,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:12:17,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:12:17,818 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:12:17,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1212482161] [2022-01-31 10:12:17,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:12:17,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:12:17,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:12:17,820 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:12:17,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-31 10:12:18,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 10:12:18,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 67 conjunts are in the unsatisfiable core [2022-01-31 10:12:18,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:12:18,412 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 0 case distinctions, treesize of input 61 treesize of output 56 [2022-01-31 10:12:18,416 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 21 treesize of output 20 [2022-01-31 10:12:18,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 19 treesize of output 18 [2022-01-31 10:12:18,482 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 0 case distinctions, treesize of input 80 treesize of output 73 [2022-01-31 10:12:18,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:18,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:18,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 10:12:18,487 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 98 [2022-01-31 10:12:18,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:18,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 7 [2022-01-31 10:12:18,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:18,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 7 [2022-01-31 10:12:18,706 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 0 case distinctions, treesize of input 77 treesize of output 68 [2022-01-31 10:12:18,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:18,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:18,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:18,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:18,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:18,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:18,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 89 [2022-01-31 10:12:18,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:18,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:18,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:18,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 14 [2022-01-31 10:12:18,823 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 0 case distinctions, treesize of input 80 treesize of output 69 [2022-01-31 10:12:18,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:18,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:18,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:18,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:18,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:18,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:18,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:18,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:18,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:18,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:18,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 104 [2022-01-31 10:12:18,855 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:12:18,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:18,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:18,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:18,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:18,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:18,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:18,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 39 [2022-01-31 10:12:19,342 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 0 case distinctions, treesize of input 104 treesize of output 91 [2022-01-31 10:12:19,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:19,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:19,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:19,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:19,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:19,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:19,459 INFO L353 Elim1Store]: treesize reduction 249, result has 46.5 percent of original size [2022-01-31 10:12:19,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 90 treesize of output 286 [2022-01-31 10:12:20,708 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:12:20,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:20,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:20,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:20,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:20,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:20,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:20,861 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:12:20,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 166 treesize of output 212 [2022-01-31 10:12:30,930 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 0 case distinctions, treesize of input 218 treesize of output 199 [2022-01-31 10:12:30,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:30,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:30,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:30,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:30,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:30,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:31,150 INFO L353 Elim1Store]: treesize reduction 715, result has 23.9 percent of original size [2022-01-31 10:12:31,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 20 case distinctions, treesize of input 198 treesize of output 364 [2022-01-31 10:12:34,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:34,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:34,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:34,597 INFO L353 Elim1Store]: treesize reduction 383, result has 4.5 percent of original size [2022-01-31 10:12:34,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 209 treesize of output 127 [2022-01-31 10:12:41,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:41,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:41,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:41,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:41,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:41,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:41,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:41,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:41,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:12:41,762 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 10:12:41,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 188 treesize of output 218 [2022-01-31 10:12:42,439 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 72 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-31 10:12:42,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:13:13,232 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_460 Int)) (or (let ((.cse2 (<= (mod c_~ARR_SIZE~0 4294967296) 2147483647))) (and (or (forall ((main_~index2~0 Int) (main_~index1~0 Int)) (<= (let ((.cse1 (* (mod c_~ARR_SIZE~0 4294967296) 4))) (let ((.cse0 (store (select |c_#memory_int| |c_main_~#array~0.base|) (+ (* main_~index2~0 4) |c_main_~#array~0.offset| (* .cse1 main_~index1~0)) v_ArrVal_460))) (+ (select .cse0 |c_main_~#array~0.offset|) (select .cse0 (+ |c_main_~#array~0.offset| 4)) 2 (select .cse0 (+ |c_main_~#array~0.offset| .cse1)) (select .cse0 (+ |c_main_~#array~0.offset| .cse1 4)) c_main_~sum~0))) (* c_~ARR_SIZE~0 2))) (not .cse2)) (or .cse2 (forall ((main_~index2~0 Int) (main_~index1~0 Int)) (<= (let ((.cse4 (* (mod c_~ARR_SIZE~0 4294967296) 4))) (let ((.cse3 (store (select |c_#memory_int| |c_main_~#array~0.base|) (+ (* (+ (- 17179869184) .cse4) main_~index1~0) (* main_~index2~0 4) |c_main_~#array~0.offset|) v_ArrVal_460))) (+ (select .cse3 (+ |c_main_~#array~0.offset| .cse4 (- 17179869180))) 2 (select .cse3 (+ (- 17179869184) |c_main_~#array~0.offset| .cse4)) (select .cse3 |c_main_~#array~0.offset|) (select .cse3 (+ |c_main_~#array~0.offset| 4)) c_main_~sum~0))) (* c_~ARR_SIZE~0 2)))))) (< (* c_main_~num~0 c_main_~num~0 c_main_~num~0 c_main_~num~0) v_ArrVal_460))) is different from false [2022-01-31 10:13:13,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:13:13,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358001233] [2022-01-31 10:13:13,809 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:13:13,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212482161] [2022-01-31 10:13:13,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212482161] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:13:13,809 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 10:13:13,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2022-01-31 10:13:13,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342897094] [2022-01-31 10:13:13,810 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 10:13:13,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 10:13:13,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:13:13,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 10:13:13,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1655, Unknown=15, NotChecked=84, Total=1980 [2022-01-31 10:13:13,811 INFO L87 Difference]: Start difference. First operand 147 states and 169 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-31 10:13:14,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:13:14,288 INFO L93 Difference]: Finished difference Result 179 states and 203 transitions. [2022-01-31 10:13:14,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 10:13:14,288 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 77 [2022-01-31 10:13:14,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:13:14,289 INFO L225 Difference]: With dead ends: 179 [2022-01-31 10:13:14,289 INFO L226 Difference]: Without dead ends: 160 [2022-01-31 10:13:14,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 64 SyntacticMatches, 9 SemanticMatches, 47 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 38.9s TimeCoverageRelationStatistics Valid=266, Invalid=1979, Unknown=15, NotChecked=92, Total=2352 [2022-01-31 10:13:14,290 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 30 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 10:13:14,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 344 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 224 Invalid, 0 Unknown, 129 Unchecked, 0.2s Time] [2022-01-31 10:13:14,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-01-31 10:13:14,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 147. [2022-01-31 10:13:14,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 125 states have (on average 1.144) internal successors, (143), 125 states have internal predecessors, (143), 14 states have call successors, (14), 9 states have call predecessors, (14), 7 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-01-31 10:13:14,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 169 transitions. [2022-01-31 10:13:14,293 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 169 transitions. Word has length 77 [2022-01-31 10:13:14,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:13:14,293 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 169 transitions. [2022-01-31 10:13:14,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-31 10:13:14,293 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 169 transitions. [2022-01-31 10:13:14,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 10:13:14,300 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:13:14,301 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 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, 1, 1, 1] [2022-01-31 10:13:14,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-31 10:13:14,503 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,SelfDestructingSolverStorable20 [2022-01-31 10:13:14,503 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:13:14,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:13:14,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1810816993, now seen corresponding path program 2 times [2022-01-31 10:13:14,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:13:14,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300420883] [2022-01-31 10:13:14,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:13:14,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:13:14,510 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:13:14,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1919940395] [2022-01-31 10:13:14,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 10:13:14,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:13:14,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:13:14,512 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:13:14,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-31 10:13:15,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 10:13:15,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:13:15,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 74 conjunts are in the unsatisfiable core [2022-01-31 10:13:15,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:13:15,309 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 0 case distinctions, treesize of input 61 treesize of output 56 [2022-01-31 10:13:15,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 59 [2022-01-31 10:13:15,318 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 31 treesize of output 18 [2022-01-31 10:13:15,335 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 52 treesize of output 22 [2022-01-31 10:13:15,385 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 0 case distinctions, treesize of input 82 treesize of output 75 [2022-01-31 10:13:15,401 INFO L353 Elim1Store]: treesize reduction 160, result has 19.6 percent of original size [2022-01-31 10:13:15,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 74 treesize of output 100 [2022-01-31 10:13:15,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:15,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 23 [2022-01-31 10:13:15,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:15,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 28 [2022-01-31 10:13:15,643 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 0 case distinctions, treesize of input 98 treesize of output 89 [2022-01-31 10:13:15,675 INFO L353 Elim1Store]: treesize reduction 321, result has 17.3 percent of original size [2022-01-31 10:13:15,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 88 treesize of output 131 [2022-01-31 10:13:15,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:15,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:15,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:15,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 40 [2022-01-31 10:13:15,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 69 [2022-01-31 10:13:15,858 INFO L353 Elim1Store]: treesize reduction 256, result has 15.5 percent of original size [2022-01-31 10:13:15,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 68 treesize of output 104 [2022-01-31 10:13:15,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:15,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:15,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:15,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:15,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:15,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:15,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 30 [2022-01-31 10:13:16,481 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 0 case distinctions, treesize of input 134 treesize of output 117 [2022-01-31 10:13:16,656 INFO L353 Elim1Store]: treesize reduction 572, result has 22.5 percent of original size [2022-01-31 10:13:16,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 116 treesize of output 236 [2022-01-31 10:13:17,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:17,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:17,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:17,210 INFO L353 Elim1Store]: treesize reduction 280, result has 0.4 percent of original size [2022-01-31 10:13:17,210 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 142 treesize of output 72 [2022-01-31 10:13:18,002 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 0 case distinctions, treesize of input 104 treesize of output 91 [2022-01-31 10:13:18,255 INFO L353 Elim1Store]: treesize reduction 387, result has 30.6 percent of original size [2022-01-31 10:13:18,256 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 90 treesize of output 241 [2022-01-31 10:13:19,056 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:13:19,252 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:13:19,724 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:13:20,103 INFO L353 Elim1Store]: treesize reduction 150, result has 22.3 percent of original size [2022-01-31 10:13:20,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 445 treesize of output 352 [2022-01-31 10:13:20,408 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-31 10:13:20,440 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-31 10:13:20,513 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-31 10:13:25,574 INFO L353 Elim1Store]: treesize reduction 1077, result has 1.8 percent of original size [2022-01-31 10:13:25,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 394 treesize of output 183 [2022-01-31 10:13:26,447 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 31 proven. 52 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-31 10:13:26,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:13:41,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:13:41,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300420883] [2022-01-31 10:13:41,031 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:13:41,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919940395] [2022-01-31 10:13:41,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919940395] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:13:41,032 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 10:13:41,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2022-01-31 10:13:41,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527785633] [2022-01-31 10:13:41,032 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 10:13:41,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 10:13:41,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:13:41,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 10:13:41,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=2011, Unknown=2, NotChecked=0, Total=2256 [2022-01-31 10:13:41,033 INFO L87 Difference]: Start difference. First operand 147 states and 169 transitions. Second operand has 34 states, 33 states have (on average 1.696969696969697) internal successors, (56), 32 states have internal predecessors, (56), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-31 10:13:42,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:13:42,151 INFO L93 Difference]: Finished difference Result 182 states and 207 transitions. [2022-01-31 10:13:42,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 10:13:42,151 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.696969696969697) internal successors, (56), 32 states have internal predecessors, (56), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 77 [2022-01-31 10:13:42,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:13:42,152 INFO L225 Difference]: With dead ends: 182 [2022-01-31 10:13:42,152 INFO L226 Difference]: Without dead ends: 163 [2022-01-31 10:13:42,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 50 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=317, Invalid=2651, Unknown=2, NotChecked=0, Total=2970 [2022-01-31 10:13:42,153 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 30 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 255 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 10:13:42,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 376 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 247 Invalid, 0 Unknown, 255 Unchecked, 0.4s Time] [2022-01-31 10:13:42,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-01-31 10:13:42,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 158. [2022-01-31 10:13:42,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 133 states have (on average 1.1428571428571428) internal successors, (152), 133 states have internal predecessors, (152), 16 states have call successors, (16), 10 states have call predecessors, (16), 8 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-01-31 10:13:42,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 182 transitions. [2022-01-31 10:13:42,156 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 182 transitions. Word has length 77 [2022-01-31 10:13:42,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:13:42,156 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 182 transitions. [2022-01-31 10:13:42,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.696969696969697) internal successors, (56), 32 states have internal predecessors, (56), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-31 10:13:42,157 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 182 transitions. [2022-01-31 10:13:42,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 10:13:42,157 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:13:42,157 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 3, 3, 3, 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, 1, 1, 1] [2022-01-31 10:13:42,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-31 10:13:42,374 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,SelfDestructingSolverStorable21 [2022-01-31 10:13:42,374 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:13:42,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:13:42,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1765414266, now seen corresponding path program 11 times [2022-01-31 10:13:42,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:13:42,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526983479] [2022-01-31 10:13:42,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:13:42,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:13:42,382 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:13:42,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1746353385] [2022-01-31 10:13:42,383 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 10:13:42,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:13:42,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:13:42,386 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:13:42,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-31 10:13:42,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-31 10:13:42,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:13:42,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 10:13:42,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:13:42,579 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 95 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-31 10:13:42,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:13:42,699 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 69 proven. 27 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-31 10:13:42,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:13:42,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526983479] [2022-01-31 10:13:42,700 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:13:42,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746353385] [2022-01-31 10:13:42,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746353385] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:13:42,700 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:13:42,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-01-31 10:13:42,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990371450] [2022-01-31 10:13:42,700 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:13:42,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 10:13:42,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:13:42,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 10:13:42,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-01-31 10:13:42,701 INFO L87 Difference]: Start difference. First operand 158 states and 182 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 states have internal predecessors, (57), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 10:13:42,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:13:42,883 INFO L93 Difference]: Finished difference Result 165 states and 185 transitions. [2022-01-31 10:13:42,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 10:13:42,883 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 states have internal predecessors, (57), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 75 [2022-01-31 10:13:42,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:13:42,884 INFO L225 Difference]: With dead ends: 165 [2022-01-31 10:13:42,884 INFO L226 Difference]: Without dead ends: 165 [2022-01-31 10:13:42,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2022-01-31 10:13:42,885 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 47 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:13:42,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 166 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:13:42,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-01-31 10:13:42,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 156. [2022-01-31 10:13:42,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 131 states have (on average 1.1221374045801527) internal successors, (147), 131 states have internal predecessors, (147), 16 states have call successors, (16), 10 states have call predecessors, (16), 8 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-01-31 10:13:42,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 177 transitions. [2022-01-31 10:13:42,888 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 177 transitions. Word has length 75 [2022-01-31 10:13:42,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:13:42,888 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 177 transitions. [2022-01-31 10:13:42,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 states have internal predecessors, (57), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 10:13:42,888 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 177 transitions. [2022-01-31 10:13:42,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-31 10:13:42,889 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:13:42,889 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 3, 3, 3, 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, 1, 1, 1] [2022-01-31 10:13:42,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-31 10:13:43,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:13:43,103 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:13:43,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:13:43,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1084876602, now seen corresponding path program 12 times [2022-01-31 10:13:43,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:13:43,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108220608] [2022-01-31 10:13:43,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:13:43,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:13:43,113 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:13:43,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1803972359] [2022-01-31 10:13:43,113 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 10:13:43,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:13:43,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:13:43,114 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:13:43,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-31 10:13:43,222 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-01-31 10:13:43,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:13:43,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 10:13:43,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:13:43,357 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 91 proven. 29 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-01-31 10:13:43,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:13:43,488 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 65 proven. 47 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-01-31 10:13:43,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:13:43,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108220608] [2022-01-31 10:13:43,488 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:13:43,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803972359] [2022-01-31 10:13:43,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803972359] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 10:13:43,489 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 10:13:43,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-01-31 10:13:43,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275610435] [2022-01-31 10:13:43,489 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 10:13:43,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 10:13:43,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:13:43,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 10:13:43,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-01-31 10:13:43,490 INFO L87 Difference]: Start difference. First operand 156 states and 177 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 10:13:43,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:13:43,717 INFO L93 Difference]: Finished difference Result 204 states and 230 transitions. [2022-01-31 10:13:43,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 10:13:43,718 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 79 [2022-01-31 10:13:43,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:13:43,718 INFO L225 Difference]: With dead ends: 204 [2022-01-31 10:13:43,718 INFO L226 Difference]: Without dead ends: 186 [2022-01-31 10:13:43,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2022-01-31 10:13:43,719 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 93 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 10:13:43,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 155 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 10:13:43,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-01-31 10:13:43,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 165. [2022-01-31 10:13:43,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 140 states have (on average 1.1214285714285714) internal successors, (157), 140 states have internal predecessors, (157), 16 states have call successors, (16), 10 states have call predecessors, (16), 8 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-01-31 10:13:43,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 187 transitions. [2022-01-31 10:13:43,723 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 187 transitions. Word has length 79 [2022-01-31 10:13:43,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:13:43,723 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 187 transitions. [2022-01-31 10:13:43,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-31 10:13:43,723 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 187 transitions. [2022-01-31 10:13:43,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-31 10:13:43,723 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:13:43,724 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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 10:13:43,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-31 10:13:43,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:13:43,939 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:13:43,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:13:43,940 INFO L85 PathProgramCache]: Analyzing trace with hash 2061519958, now seen corresponding path program 2 times [2022-01-31 10:13:43,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:13:43,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959185315] [2022-01-31 10:13:43,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:13:43,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:13:43,946 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:13:43,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1640100092] [2022-01-31 10:13:43,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 10:13:43,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:13:43,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:13:43,948 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:13:43,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-31 10:13:44,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 10:13:44,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:13:44,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 117 conjunts are in the unsatisfiable core [2022-01-31 10:13:44,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:13:44,288 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 0 case distinctions, treesize of input 61 treesize of output 56 [2022-01-31 10:13:44,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 19 treesize of output 18 [2022-01-31 10:13:44,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 21 treesize of output 20 [2022-01-31 10:13:44,386 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 0 case distinctions, treesize of input 78 treesize of output 71 [2022-01-31 10:13:44,401 INFO L353 Elim1Store]: treesize reduction 136, result has 18.6 percent of original size [2022-01-31 10:13:44,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 70 treesize of output 92 [2022-01-31 10:13:44,421 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:13:44,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:44,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 24 [2022-01-31 10:13:44,640 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 0 case distinctions, treesize of input 98 treesize of output 89 [2022-01-31 10:13:44,674 INFO L353 Elim1Store]: treesize reduction 321, result has 17.3 percent of original size [2022-01-31 10:13:44,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 88 treesize of output 131 [2022-01-31 10:13:44,694 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:13:44,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:44,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:44,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:44,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 28 [2022-01-31 10:13:44,838 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 0 case distinctions, treesize of input 80 treesize of output 69 [2022-01-31 10:13:44,886 INFO L353 Elim1Store]: treesize reduction 256, result has 15.5 percent of original size [2022-01-31 10:13:44,887 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 68 treesize of output 104 [2022-01-31 10:13:44,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:44,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:44,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:44,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:44,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:44,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:44,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 28 [2022-01-31 10:13:59,469 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 0 case distinctions, treesize of input 112 treesize of output 99 [2022-01-31 10:13:59,669 INFO L353 Elim1Store]: treesize reduction 469, result has 20.5 percent of original size [2022-01-31 10:13:59,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 98 treesize of output 199 [2022-01-31 10:13:59,877 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:13:59,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:59,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:59,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:59,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:59,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:59,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:59,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:59,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:59,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:59,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:13:59,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:14:00,002 INFO L353 Elim1Store]: treesize reduction 49, result has 50.0 percent of original size [2022-01-31 10:14:00,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 188 treesize of output 168 [2022-01-31 10:14:28,367 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 0 case distinctions, treesize of input 170 treesize of output 153 [2022-01-31 10:14:29,218 INFO L353 Elim1Store]: treesize reduction 1118, result has 12.7 percent of original size [2022-01-31 10:14:29,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 27 case distinctions, treesize of input 152 treesize of output 262 [2022-01-31 10:14:30,426 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:14:31,086 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:14:32,031 INFO L353 Elim1Store]: treesize reduction 463, result has 14.4 percent of original size [2022-01-31 10:14:32,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 444 treesize of output 380 [2022-01-31 10:15:21,496 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 0 case distinctions, treesize of input 365 treesize of output 326 [2022-01-31 10:15:23,402 INFO L353 Elim1Store]: treesize reduction 1346, result has 15.7 percent of original size [2022-01-31 10:15:23,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 35 case distinctions, treesize of input 325 treesize of output 411 [2022-01-31 10:15:30,179 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:15:30,329 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:15:30,916 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:15:31,704 INFO L353 Elim1Store]: treesize reduction 330, result has 23.4 percent of original size [2022-01-31 10:15:31,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 435 treesize of output 389 [2022-01-31 10:15:33,082 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:15:33,431 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:15:34,081 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:15:34,587 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:15:36,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:36,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:36,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:36,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:36,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:36,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:36,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:36,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:36,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:36,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:36,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:36,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:36,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:15:36,819 INFO L353 Elim1Store]: treesize reduction 90, result has 56.5 percent of original size [2022-01-31 10:15:36,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 13 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 665 treesize of output 516 [2022-01-31 10:17:52,724 INFO L353 Elim1Store]: treesize reduction 1312, result has 12.0 percent of original size [2022-01-31 10:17:52,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 573 treesize of output 429 [2022-01-31 10:18:11,004 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 24 proven. 103 refuted. 16 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 10:18:11,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 10:18:39,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 10:18:39,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959185315] [2022-01-31 10:18:39,851 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 10:18:39,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640100092] [2022-01-31 10:18:39,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640100092] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 10:18:39,851 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-31 10:18:39,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2022-01-31 10:18:39,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393807942] [2022-01-31 10:18:39,851 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-31 10:18:39,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 10:18:39,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 10:18:39,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 10:18:39,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=707, Invalid=4964, Unknown=29, NotChecked=0, Total=5700 [2022-01-31 10:18:39,853 INFO L87 Difference]: Start difference. First operand 165 states and 187 transitions. Second operand has 54 states, 50 states have (on average 1.3) internal successors, (65), 44 states have internal predecessors, (65), 9 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 10:18:53,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 10:18:53,690 INFO L93 Difference]: Finished difference Result 201 states and 226 transitions. [2022-01-31 10:18:53,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 10:18:53,691 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 50 states have (on average 1.3) internal successors, (65), 44 states have internal predecessors, (65), 9 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 92 [2022-01-31 10:18:53,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 10:18:53,691 INFO L225 Difference]: With dead ends: 201 [2022-01-31 10:18:53,691 INFO L226 Difference]: Without dead ends: 182 [2022-01-31 10:18:53,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3358 ImplicationChecksByTransitivity, 120.6s TimeCoverageRelationStatistics Valid=788, Invalid=5820, Unknown=34, NotChecked=0, Total=6642 [2022-01-31 10:18:53,693 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 58 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 505 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 10:18:53,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 475 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 153 Invalid, 0 Unknown, 505 Unchecked, 0.4s Time] [2022-01-31 10:18:53,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-01-31 10:18:53,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 176. [2022-01-31 10:18:53,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 148 states have (on average 1.1216216216216217) internal successors, (166), 148 states have internal predecessors, (166), 18 states have call successors, (18), 11 states have call predecessors, (18), 9 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-01-31 10:18:53,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 200 transitions. [2022-01-31 10:18:53,696 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 200 transitions. Word has length 92 [2022-01-31 10:18:53,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 10:18:53,697 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 200 transitions. [2022-01-31 10:18:53,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 50 states have (on average 1.3) internal successors, (65), 44 states have internal predecessors, (65), 9 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 10:18:53,697 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 200 transitions. [2022-01-31 10:18:53,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-31 10:18:53,697 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 10:18:53,698 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 3, 3, 3, 3, 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, 1] [2022-01-31 10:18:53,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-01-31 10:18:53,902 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,SelfDestructingSolverStorable24 [2022-01-31 10:18:53,903 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 10:18:53,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 10:18:53,903 INFO L85 PathProgramCache]: Analyzing trace with hash -988682857, now seen corresponding path program 3 times [2022-01-31 10:18:53,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 10:18:53,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213538102] [2022-01-31 10:18:53,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 10:18:53,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 10:18:53,912 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 10:18:53,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [281376327] [2022-01-31 10:18:53,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 10:18:53,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 10:18:53,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 10:18:53,915 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 10:18:53,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-31 10:18:55,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-01-31 10:18:55,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 10:18:55,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 123 conjunts are in the unsatisfiable core [2022-01-31 10:18:55,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 10:18:55,264 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 0 case distinctions, treesize of input 61 treesize of output 56 [2022-01-31 10:18:55,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 19 treesize of output 18 [2022-01-31 10:18:55,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 21 treesize of output 20 [2022-01-31 10:18:55,399 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 0 case distinctions, treesize of input 74 treesize of output 67 [2022-01-31 10:18:55,432 INFO L353 Elim1Store]: treesize reduction 128, result has 19.5 percent of original size [2022-01-31 10:18:55,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 88 [2022-01-31 10:18:55,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:18:55,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 19 [2022-01-31 10:18:55,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:18:55,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 24 [2022-01-31 10:18:55,771 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 0 case distinctions, treesize of input 77 treesize of output 68 [2022-01-31 10:18:55,865 INFO L353 Elim1Store]: treesize reduction 174, result has 12.6 percent of original size [2022-01-31 10:18:55,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 67 treesize of output 89 [2022-01-31 10:18:55,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:18:55,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:18:55,884 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-01-31 10:18:55,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 16 [2022-01-31 10:18:55,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:18:55,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:18:55,970 INFO L353 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2022-01-31 10:18:55,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 26 [2022-01-31 10:18:56,327 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 0 case distinctions, treesize of input 147 treesize of output 130 [2022-01-31 10:18:56,526 INFO L353 Elim1Store]: treesize reduction 604, result has 13.8 percent of original size [2022-01-31 10:18:56,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 129 treesize of output 187 [2022-01-31 10:18:56,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:18:56,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:18:56,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:18:56,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:18:56,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:18:56,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:18:56,565 INFO L353 Elim1Store]: treesize reduction 99, result has 1.0 percent of original size [2022-01-31 10:18:56,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 177 treesize of output 92 [2022-01-31 10:19:08,844 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 0 case distinctions, treesize of input 116 treesize of output 103 [2022-01-31 10:19:09,352 INFO L353 Elim1Store]: treesize reduction 503, result has 20.7 percent of original size [2022-01-31 10:19:09,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 102 treesize of output 209 [2022-01-31 10:19:10,126 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:19:10,813 INFO L353 Elim1Store]: treesize reduction 330, result has 13.4 percent of original size [2022-01-31 10:19:10,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 260 treesize of output 222 [2022-01-31 10:19:56,577 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 0 case distinctions, treesize of input 178 treesize of output 157 [2022-01-31 10:19:58,375 INFO L353 Elim1Store]: treesize reduction 1088, result has 13.7 percent of original size [2022-01-31 10:19:58,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 27 case distinctions, treesize of input 156 treesize of output 258 [2022-01-31 10:20:03,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:20:03,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:20:03,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:20:03,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:20:03,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:20:03,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:20:03,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:20:03,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:20:03,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:20:03,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:20:03,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:20:03,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:20:03,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:20:03,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:20:03,881 INFO L353 Elim1Store]: treesize reduction 300, result has 21.3 percent of original size [2022-01-31 10:20:03,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 14 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 14 case distinctions, treesize of input 213 treesize of output 179 [2022-01-31 10:20:04,721 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 10:20:05,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:20:05,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:20:05,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:20:05,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 10:20:05,626 INFO L353 Elim1Store]: treesize reduction 107, result has 30.5 percent of original size [2022-01-31 10:20:05,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 196 treesize of output 154