/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/eqn2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-09 23:19:51,646 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-09 23:19:51,647 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-09 23:19:51,699 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-09 23:19:51,699 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-09 23:19:51,701 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-09 23:19:51,703 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-09 23:19:51,705 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-09 23:19:51,706 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-09 23:19:51,710 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-09 23:19:51,711 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-09 23:19:51,711 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-09 23:19:51,712 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-09 23:19:51,713 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-09 23:19:51,714 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-09 23:19:51,716 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-09 23:19:51,717 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-09 23:19:51,717 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-09 23:19:51,719 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-09 23:19:51,722 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-09 23:19:51,723 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-09 23:19:51,724 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-09 23:19:51,725 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-09 23:19:51,725 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-09 23:19:51,730 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-09 23:19:51,736 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-09 23:19:51,737 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-09 23:19:51,737 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-09 23:19:51,738 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf [2022-01-09 23:19:51,762 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-09 23:19:51,762 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-09 23:19:51,762 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-09 23:19:51,762 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-09 23:19:51,763 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-09 23:19:51,763 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-09 23:19:51,764 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-09 23:19:51,764 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-09 23:19:51,764 INFO L138 SettingsManager]: * Use SBE=true [2022-01-09 23:19:51,764 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-09 23:19:51,765 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-09 23:19:51,765 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-09 23:19:51,765 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-09 23:19:51,765 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-09 23:19:51,765 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-09 23:19:51,766 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-09 23:19:51,766 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-09 23:19:51,766 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-09 23:19:51,766 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-09 23:19:51,766 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-09 23:19:51,766 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-09 23:19:51,766 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 23:19:51,766 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-09 23:19:51,766 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-09 23:19:51,767 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-09 23:19:51,768 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-09 23:19:51,768 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-09 23:19:51,768 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-09 23:19:51,768 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-09 23:19:51,768 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-09 23:19:51,768 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-09 23:19:51,981 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-09 23:19:52,010 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-09 23:19:52,012 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-09 23:19:52,013 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-09 23:19:52,014 INFO L275 PluginConnector]: CDTParser initialized [2022-01-09 23:19:52,015 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/eqn2.c [2022-01-09 23:19:52,082 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e434eb8dc/1d70ce7ba8784a32aae4eb2b9d95932c/FLAG6fcb3fae5 [2022-01-09 23:19:52,383 INFO L306 CDTParser]: Found 1 translation units. [2022-01-09 23:19:52,384 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/eqn2.c [2022-01-09 23:19:52,388 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e434eb8dc/1d70ce7ba8784a32aae4eb2b9d95932c/FLAG6fcb3fae5 [2022-01-09 23:19:52,814 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e434eb8dc/1d70ce7ba8784a32aae4eb2b9d95932c [2022-01-09 23:19:52,816 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-09 23:19:52,817 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-09 23:19:52,818 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-09 23:19:52,818 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-09 23:19:52,821 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-09 23:19:52,821 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 11:19:52" (1/1) ... [2022-01-09 23:19:52,822 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e314b99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:19:52, skipping insertion in model container [2022-01-09 23:19:52,822 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 11:19:52" (1/1) ... [2022-01-09 23:19:52,827 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-09 23:19:52,836 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-09 23:19:52,953 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-fpi/eqn2.c[587,600] [2022-01-09 23:19:52,984 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 23:19:52,993 INFO L203 MainTranslator]: Completed pre-run [2022-01-09 23:19:53,005 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-fpi/eqn2.c[587,600] [2022-01-09 23:19:53,019 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 23:19:53,031 INFO L208 MainTranslator]: Completed translation [2022-01-09 23:19:53,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:19:53 WrapperNode [2022-01-09 23:19:53,034 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-09 23:19:53,035 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-09 23:19:53,035 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-09 23:19:53,035 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-09 23:19:53,040 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:19:53" (1/1) ... [2022-01-09 23:19:53,047 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:19:53" (1/1) ... [2022-01-09 23:19:53,075 INFO L137 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2022-01-09 23:19:53,076 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-09 23:19:53,076 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-09 23:19:53,076 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-09 23:19:53,076 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-09 23:19:53,082 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:19:53" (1/1) ... [2022-01-09 23:19:53,082 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:19:53" (1/1) ... [2022-01-09 23:19:53,094 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:19:53" (1/1) ... [2022-01-09 23:19:53,097 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:19:53" (1/1) ... [2022-01-09 23:19:53,101 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:19:53" (1/1) ... [2022-01-09 23:19:53,104 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:19:53" (1/1) ... [2022-01-09 23:19:53,105 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:19:53" (1/1) ... [2022-01-09 23:19:53,106 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-09 23:19:53,106 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-09 23:19:53,106 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-09 23:19:53,107 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-09 23:19:53,109 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:19:53" (1/1) ... [2022-01-09 23:19:53,115 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 23:19:53,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:19:53,147 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) [2022-01-09 23:19:53,164 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 [2022-01-09 23:19:53,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-09 23:19:53,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-09 23:19:53,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-09 23:19:53,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-09 23:19:53,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-09 23:19:53,173 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-09 23:19:53,174 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-09 23:19:53,213 INFO L234 CfgBuilder]: Building ICFG [2022-01-09 23:19:53,214 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-09 23:19:53,369 INFO L275 CfgBuilder]: Performing block encoding [2022-01-09 23:19:53,373 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-09 23:19:53,374 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-09 23:19:53,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 11:19:53 BoogieIcfgContainer [2022-01-09 23:19:53,375 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-09 23:19:53,376 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-09 23:19:53,376 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-09 23:19:53,393 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-09 23:19:53,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 11:19:52" (1/3) ... [2022-01-09 23:19:53,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1225684f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 11:19:53, skipping insertion in model container [2022-01-09 23:19:53,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:19:53" (2/3) ... [2022-01-09 23:19:53,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1225684f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 11:19:53, skipping insertion in model container [2022-01-09 23:19:53,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 11:19:53" (3/3) ... [2022-01-09 23:19:53,395 INFO L111 eAbstractionObserver]: Analyzing ICFG eqn2.c [2022-01-09 23:19:53,398 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-09 23:19:53,399 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-09 23:19:53,430 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-09 23:19:53,434 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 [2022-01-09 23:19:53,435 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-09 23:19:53,445 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:19:53,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-09 23:19:53,449 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:19:53,449 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:19:53,449 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:19:53,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:19:53,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2022-01-09 23:19:53,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:19:53,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663560567] [2022-01-09 23:19:53,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:19:53,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:19:53,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:19:53,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:19:53,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:19:53,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663560567] [2022-01-09 23:19:53,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663560567] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:19:53,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:19:53,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-09 23:19:53,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036125283] [2022-01-09 23:19:53,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:19:53,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-09 23:19:53,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:19:53,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-09 23:19:53,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-09 23:19:53,647 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:19:53,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:19:53,662 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2022-01-09 23:19:53,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-09 23:19:53,664 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-01-09 23:19:53,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:19:53,669 INFO L225 Difference]: With dead ends: 38 [2022-01-09 23:19:53,670 INFO L226 Difference]: Without dead ends: 17 [2022-01-09 23:19:53,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-09 23:19:53,676 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:19:53,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:19:53,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-01-09 23:19:53,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-01-09 23:19:53,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:19:53,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-01-09 23:19:53,700 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2022-01-09 23:19:53,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:19:53,700 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-01-09 23:19:53,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:19:53,701 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-01-09 23:19:53,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-09 23:19:53,701 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:19:53,702 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:19:53,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-09 23:19:53,703 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:19:53,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:19:53,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2022-01-09 23:19:53,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:19:53,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645237453] [2022-01-09 23:19:53,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:19:53,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:19:53,752 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 23:19:53,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [56759448] [2022-01-09 23:19:53,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:19:53,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:19:53,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:19:53,764 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) [2022-01-09 23:19:53,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-09 23:19:53,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:19:53,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-09 23:19:53,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:19:53,909 INFO L353 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-01-09 23:19:53,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 51 [2022-01-09 23:19:53,917 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 8 treesize of output 7 [2022-01-09 23:19:53,926 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 8 treesize of output 7 [2022-01-09 23:19:54,114 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-09 23:19:54,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 11 [2022-01-09 23:19:54,162 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 5 treesize of output 3 [2022-01-09 23:19:54,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:19:54,245 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 23:19:54,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:19:54,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645237453] [2022-01-09 23:19:54,245 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 23:19:54,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56759448] [2022-01-09 23:19:54,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56759448] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:19:54,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:19:54,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-09 23:19:54,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168943105] [2022-01-09 23:19:54,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:19:54,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-09 23:19:54,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:19:54,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-09 23:19:54,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:19:54,251 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:19:54,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:19:54,311 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-01-09 23:19:54,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-09 23:19:54,311 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-01-09 23:19:54,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:19:54,313 INFO L225 Difference]: With dead ends: 34 [2022-01-09 23:19:54,313 INFO L226 Difference]: Without dead ends: 32 [2022-01-09 23:19:54,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-09 23:19:54,315 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 12 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:19:54,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 56 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:19:54,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-09 23:19:54,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2022-01-09 23:19:54,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:19:54,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-01-09 23:19:54,331 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2022-01-09 23:19:54,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:19:54,331 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-01-09 23:19:54,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:19:54,332 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-01-09 23:19:54,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-09 23:19:54,332 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:19:54,332 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:19:54,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-09 23:19:54,549 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 [2022-01-09 23:19:54,549 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:19:54,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:19:54,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1755224028, now seen corresponding path program 1 times [2022-01-09 23:19:54,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:19:54,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346590989] [2022-01-09 23:19:54,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:19:54,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:19:54,583 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 23:19:54,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1009194153] [2022-01-09 23:19:54,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:19:54,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:19:54,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:19:54,607 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) [2022-01-09 23:19:54,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-09 23:19:54,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:19:54,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-09 23:19:54,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:19:54,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:19:54,696 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 23:19:54,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:19:54,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346590989] [2022-01-09 23:19:54,696 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 23:19:54,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009194153] [2022-01-09 23:19:54,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009194153] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:19:54,696 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:19:54,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-09 23:19:54,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093285040] [2022-01-09 23:19:54,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:19:54,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-09 23:19:54,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:19:54,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-09 23:19:54,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:19:54,698 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:19:54,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:19:54,738 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2022-01-09 23:19:54,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-09 23:19:54,738 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-09 23:19:54,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:19:54,739 INFO L225 Difference]: With dead ends: 49 [2022-01-09 23:19:54,739 INFO L226 Difference]: Without dead ends: 40 [2022-01-09 23:19:54,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-09 23:19:54,740 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 26 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:19:54,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 29 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:19:54,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-09 23:19:54,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 23. [2022-01-09 23:19:54,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:19:54,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-01-09 23:19:54,743 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2022-01-09 23:19:54,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:19:54,743 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-01-09 23:19:54,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:19:54,743 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-01-09 23:19:54,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-09 23:19:54,744 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:19:54,744 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:19:54,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-09 23:19:54,960 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 [2022-01-09 23:19:54,960 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:19:54,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:19:54,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1842440164, now seen corresponding path program 1 times [2022-01-09 23:19:54,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:19:54,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061960286] [2022-01-09 23:19:54,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:19:54,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:19:54,975 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 23:19:54,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [25299457] [2022-01-09 23:19:54,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:19:54,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:19:54,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:19:54,979 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) [2022-01-09 23:19:54,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-09 23:19:55,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:19:55,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-09 23:19:55,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:19:55,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:19:55,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:19:55,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:19:55,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:19:55,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061960286] [2022-01-09 23:19:55,089 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 23:19:55,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25299457] [2022-01-09 23:19:55,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25299457] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:19:55,090 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 23:19:55,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2022-01-09 23:19:55,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037411919] [2022-01-09 23:19:55,090 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 23:19:55,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-09 23:19:55,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:19:55,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-09 23:19:55,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-09 23:19:55,092 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:19:55,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:19:55,151 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2022-01-09 23:19:55,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-09 23:19:55,151 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-09 23:19:55,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:19:55,152 INFO L225 Difference]: With dead ends: 44 [2022-01-09 23:19:55,152 INFO L226 Difference]: Without dead ends: 37 [2022-01-09 23:19:55,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-01-09 23:19:55,153 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:19:55,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 46 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:19:55,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-09 23:19:55,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2022-01-09 23:19:55,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:19:55,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-01-09 23:19:55,156 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 14 [2022-01-09 23:19:55,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:19:55,156 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-01-09 23:19:55,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:19:55,156 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-01-09 23:19:55,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-09 23:19:55,157 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:19:55,157 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:19:55,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-09 23:19:55,373 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 [2022-01-09 23:19:55,373 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:19:55,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:19:55,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1667884396, now seen corresponding path program 1 times [2022-01-09 23:19:55,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:19:55,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007110038] [2022-01-09 23:19:55,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:19:55,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:19:55,384 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 23:19:55,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2147347850] [2022-01-09 23:19:55,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:19:55,384 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:19:55,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:19:55,385 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) [2022-01-09 23:19:55,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-09 23:19:55,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:19:55,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-09 23:19:55,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:19:55,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:19:55,484 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 23:19:55,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:19:55,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007110038] [2022-01-09 23:19:55,485 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 23:19:55,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147347850] [2022-01-09 23:19:55,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147347850] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:19:55,485 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:19:55,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-09 23:19:55,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340114962] [2022-01-09 23:19:55,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:19:55,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-09 23:19:55,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:19:55,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-09 23:19:55,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-09 23:19:55,486 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:19:55,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:19:55,537 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2022-01-09 23:19:55,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-09 23:19:55,537 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-09 23:19:55,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:19:55,537 INFO L225 Difference]: With dead ends: 41 [2022-01-09 23:19:55,537 INFO L226 Difference]: Without dead ends: 27 [2022-01-09 23:19:55,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-09 23:19:55,538 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 18 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:19:55,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 32 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:19:55,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-09 23:19:55,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2022-01-09 23:19:55,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:19:55,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-01-09 23:19:55,540 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2022-01-09 23:19:55,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:19:55,541 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-01-09 23:19:55,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:19:55,541 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-01-09 23:19:55,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-09 23:19:55,541 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:19:55,541 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:19:55,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-09 23:19:55,755 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 [2022-01-09 23:19:55,755 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:19:55,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:19:55,756 INFO L85 PathProgramCache]: Analyzing trace with hash 586911962, now seen corresponding path program 1 times [2022-01-09 23:19:55,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:19:55,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754988966] [2022-01-09 23:19:55,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:19:55,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:19:55,771 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 23:19:55,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [194385027] [2022-01-09 23:19:55,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:19:55,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:19:55,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:19:55,773 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) [2022-01-09 23:19:55,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-09 23:19:55,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:19:55,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-09 23:19:55,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:19:55,835 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 10 treesize of output 8 [2022-01-09 23:19:55,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:19:55,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-01-09 23:19:55,841 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 8 treesize of output 7 [2022-01-09 23:19:55,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-01-09 23:19:55,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:19:55,888 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-01-09 23:19:55,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:19:55,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:19:56,027 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_147 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_147) |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|) 1)) is different from false [2022-01-09 23:19:56,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-01-09 23:19:56,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:19:56,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754988966] [2022-01-09 23:19:56,061 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 23:19:56,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194385027] [2022-01-09 23:19:56,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194385027] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:19:56,061 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 23:19:56,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-01-09 23:19:56,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670729015] [2022-01-09 23:19:56,061 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 23:19:56,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-09 23:19:56,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:19:56,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-09 23:19:56,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=64, Unknown=1, NotChecked=16, Total=110 [2022-01-09 23:19:56,062 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:19:56,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:19:56,198 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2022-01-09 23:19:56,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-09 23:19:56,198 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-09 23:19:56,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:19:56,199 INFO L225 Difference]: With dead ends: 44 [2022-01-09 23:19:56,199 INFO L226 Difference]: Without dead ends: 42 [2022-01-09 23:19:56,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=109, Unknown=1, NotChecked=22, Total=182 [2022-01-09 23:19:56,200 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 28 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:19:56,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 107 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 56 Invalid, 0 Unknown, 44 Unchecked, 0.1s Time] [2022-01-09 23:19:56,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-09 23:19:56,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 28. [2022-01-09 23:19:56,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:19:56,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-01-09 23:19:56,203 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 16 [2022-01-09 23:19:56,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:19:56,203 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-01-09 23:19:56,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:19:56,203 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-01-09 23:19:56,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-09 23:19:56,204 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:19:56,204 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:19:56,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-09 23:19:56,409 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 [2022-01-09 23:19:56,412 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:19:56,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:19:56,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1267903976, now seen corresponding path program 2 times [2022-01-09 23:19:56,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:19:56,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967633239] [2022-01-09 23:19:56,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:19:56,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:19:56,438 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 23:19:56,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [994345522] [2022-01-09 23:19:56,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 23:19:56,438 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:19:56,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:19:56,459 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) [2022-01-09 23:19:56,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-09 23:19:56,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 23:19:56,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:19:56,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-09 23:19:56,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:19:56,550 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:19:56,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:19:56,581 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:19:56,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:19:56,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967633239] [2022-01-09 23:19:56,582 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 23:19:56,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994345522] [2022-01-09 23:19:56,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994345522] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:19:56,582 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 23:19:56,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-01-09 23:19:56,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687682633] [2022-01-09 23:19:56,582 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 23:19:56,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-09 23:19:56,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:19:56,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-09 23:19:56,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-09 23:19:56,583 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:19:56,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:19:56,657 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2022-01-09 23:19:56,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-09 23:19:56,657 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-09 23:19:56,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:19:56,658 INFO L225 Difference]: With dead ends: 61 [2022-01-09 23:19:56,658 INFO L226 Difference]: Without dead ends: 52 [2022-01-09 23:19:56,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-01-09 23:19:56,658 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 36 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:19:56,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 37 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:19:56,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-09 23:19:56,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 28. [2022-01-09 23:19:56,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:19:56,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-01-09 23:19:56,662 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 18 [2022-01-09 23:19:56,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:19:56,662 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-01-09 23:19:56,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:19:56,662 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-01-09 23:19:56,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-09 23:19:56,663 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:19:56,663 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:19:56,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-09 23:19:56,879 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 [2022-01-09 23:19:56,879 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:19:56,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:19:56,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1174519208, now seen corresponding path program 3 times [2022-01-09 23:19:56,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:19:56,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513387200] [2022-01-09 23:19:56,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:19:56,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:19:56,892 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 23:19:56,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1014136359] [2022-01-09 23:19:56,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-09 23:19:56,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:19:56,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:19:56,893 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) [2022-01-09 23:19:56,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-09 23:19:56,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-09 23:19:56,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:19:56,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-09 23:19:56,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:19:57,002 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:19:57,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:19:57,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:19:57,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:19:57,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513387200] [2022-01-09 23:19:57,035 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 23:19:57,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014136359] [2022-01-09 23:19:57,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014136359] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:19:57,035 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 23:19:57,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-01-09 23:19:57,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572647975] [2022-01-09 23:19:57,036 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 23:19:57,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-09 23:19:57,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:19:57,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-09 23:19:57,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-09 23:19:57,036 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:19:57,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:19:57,135 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2022-01-09 23:19:57,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-09 23:19:57,136 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-09 23:19:57,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:19:57,136 INFO L225 Difference]: With dead ends: 56 [2022-01-09 23:19:57,136 INFO L226 Difference]: Without dead ends: 49 [2022-01-09 23:19:57,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-01-09 23:19:57,137 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 48 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:19:57,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 61 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:19:57,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-01-09 23:19:57,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2022-01-09 23:19:57,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:19:57,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-01-09 23:19:57,140 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 18 [2022-01-09 23:19:57,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:19:57,140 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-01-09 23:19:57,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:19:57,141 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-01-09 23:19:57,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-09 23:19:57,141 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:19:57,141 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:19:57,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-09 23:19:57,357 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 [2022-01-09 23:19:57,358 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:19:57,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:19:57,358 INFO L85 PathProgramCache]: Analyzing trace with hash 798963152, now seen corresponding path program 1 times [2022-01-09 23:19:57,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:19:57,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83607222] [2022-01-09 23:19:57,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:19:57,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:19:57,382 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 23:19:57,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1680057063] [2022-01-09 23:19:57,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:19:57,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:19:57,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:19:57,388 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) [2022-01-09 23:19:57,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-09 23:19:57,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:19:57,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-09 23:19:57,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:19:57,469 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 10 treesize of output 8 [2022-01-09 23:19:57,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:19:57,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-01-09 23:19:57,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 20 treesize of output 20 [2022-01-09 23:19:57,482 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 8 treesize of output 7 [2022-01-09 23:19:57,484 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 8 treesize of output 7 [2022-01-09 23:19:57,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:19:57,513 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-09 23:19:57,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-01-09 23:19:57,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:19:57,565 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-09 23:19:57,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 32 [2022-01-09 23:19:57,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:19:57,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:19:57,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:19:57,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:19:57,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83607222] [2022-01-09 23:19:57,808 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 23:19:57,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680057063] [2022-01-09 23:19:57,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680057063] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:19:57,808 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 23:19:57,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2022-01-09 23:19:57,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994836796] [2022-01-09 23:19:57,808 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 23:19:57,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-09 23:19:57,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:19:57,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-09 23:19:57,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-01-09 23:19:57,809 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:19:57,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:19:57,877 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2022-01-09 23:19:57,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-09 23:19:57,877 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-09 23:19:57,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:19:57,877 INFO L225 Difference]: With dead ends: 36 [2022-01-09 23:19:57,877 INFO L226 Difference]: Without dead ends: 34 [2022-01-09 23:19:57,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-01-09 23:19:57,878 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 8 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:19:57,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 68 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 31 Unchecked, 0.0s Time] [2022-01-09 23:19:57,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-09 23:19:57,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-01-09 23:19:57,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:19:57,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2022-01-09 23:19:57,881 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 20 [2022-01-09 23:19:57,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:19:57,882 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2022-01-09 23:19:57,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:19:57,882 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2022-01-09 23:19:57,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-09 23:19:57,882 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:19:57,882 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:19:57,901 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-01-09 23:19:58,083 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 [2022-01-09 23:19:58,084 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:19:58,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:19:58,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1786143722, now seen corresponding path program 4 times [2022-01-09 23:19:58,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:19:58,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407950330] [2022-01-09 23:19:58,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:19:58,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:19:58,095 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 23:19:58,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [591284871] [2022-01-09 23:19:58,096 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-09 23:19:58,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:19:58,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:19:58,109 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) [2022-01-09 23:19:58,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-09 23:19:58,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-09 23:19:58,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:19:58,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-09 23:19:58,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:19:58,178 INFO L353 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-01-09 23:19:58,179 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 51 [2022-01-09 23:19:58,183 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 8 treesize of output 7 [2022-01-09 23:19:58,186 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 8 treesize of output 7 [2022-01-09 23:19:58,202 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 11 [2022-01-09 23:19:58,204 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 5 treesize of output 3 [2022-01-09 23:19:58,215 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 10 treesize of output 8 [2022-01-09 23:19:58,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-01-09 23:19:58,241 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-01-09 23:19:58,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:19:58,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-01-09 23:19:58,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:19:58,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-01-09 23:19:58,321 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-09 23:19:58,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:20:00,382 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_54| Int)) (or (forall ((v_ArrVal_308 Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_54| 8) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_308) |c_ULTIMATE.start_main_~b~0#1.offset|) 1)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_54|)))) is different from false [2022-01-09 23:20:00,684 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_54| Int) (v_ArrVal_308 Int) (v_ArrVal_306 Int)) (or (= (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_306) (+ (* |v_ULTIMATE.start_main_~i~0#1_54| 8) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_308) |c_ULTIMATE.start_main_~b~0#1.offset|) 1) (not (<= 2 |v_ULTIMATE.start_main_~i~0#1_54|)))) is different from false [2022-01-09 23:20:00,715 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_305 (Array Int Int)) (|v_ULTIMATE.start_main_~i~0#1_54| Int) (v_ArrVal_308 Int) (v_ArrVal_306 Int)) (or (not (<= 2 |v_ULTIMATE.start_main_~i~0#1_54|)) (= (select (store (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_305) |c_ULTIMATE.start_main_~b~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_306) (+ (* |v_ULTIMATE.start_main_~i~0#1_54| 8) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_308) |c_ULTIMATE.start_main_~b~0#1.offset|) 1))) is different from false [2022-01-09 23:20:00,746 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2022-01-09 23:20:00,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:20:00,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407950330] [2022-01-09 23:20:00,746 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 23:20:00,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591284871] [2022-01-09 23:20:00,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591284871] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:20:00,746 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 23:20:00,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2022-01-09 23:20:00,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073400604] [2022-01-09 23:20:00,747 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 23:20:00,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-09 23:20:00,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:20:00,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-09 23:20:00,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=97, Unknown=3, NotChecked=66, Total=210 [2022-01-09 23:20:00,748 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:20:02,774 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~i~0#1_54| Int)) (or (forall ((v_ArrVal_308 Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_54| 8) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_308) |c_ULTIMATE.start_main_~b~0#1.offset|) 1)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_54|)))) (= 0 |c_ULTIMATE.start_main_~b~0#1.offset|) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|) 1) (not (= |c_ULTIMATE.start_main_~b~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (= |c_ULTIMATE.start_main_~i~0#1| 1)) is different from false [2022-01-09 23:20:04,789 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~i~0#1_54| Int)) (or (forall ((v_ArrVal_308 Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_54| 8) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_308) |c_ULTIMATE.start_main_~b~0#1.offset|) 1)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_54|)))) (= 0 |c_ULTIMATE.start_main_~b~0#1.offset|) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|) 1)) is different from false [2022-01-09 23:20:04,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:20:04,812 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2022-01-09 23:20:04,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-09 23:20:04,812 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-09 23:20:04,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:20:04,812 INFO L225 Difference]: With dead ends: 48 [2022-01-09 23:20:04,812 INFO L226 Difference]: Without dead ends: 46 [2022-01-09 23:20:04,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=64, Invalid=133, Unknown=5, NotChecked=140, Total=342 [2022-01-09 23:20:04,813 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 7 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:20:04,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 84 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 76 Unchecked, 0.0s Time] [2022-01-09 23:20:04,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-01-09 23:20:04,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2022-01-09 23:20:04,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 38 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:20:04,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2022-01-09 23:20:04,817 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 20 [2022-01-09 23:20:04,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:20:04,817 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2022-01-09 23:20:04,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:20:04,817 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2022-01-09 23:20:04,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-09 23:20:04,818 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:20:04,818 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:20:04,837 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-01-09 23:20:05,027 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 [2022-01-09 23:20:05,027 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:20:05,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:20:05,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1197174726, now seen corresponding path program 2 times [2022-01-09 23:20:05,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:20:05,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125137376] [2022-01-09 23:20:05,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:20:05,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:20:05,037 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 23:20:05,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1472134971] [2022-01-09 23:20:05,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 23:20:05,038 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:20:05,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:20:05,039 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) [2022-01-09 23:20:05,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-09 23:20:05,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 23:20:05,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:20:05,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-09 23:20:05,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:20:05,196 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-09 23:20:05,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:20:05,254 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-09 23:20:05,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:20:05,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125137376] [2022-01-09 23:20:05,254 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 23:20:05,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472134971] [2022-01-09 23:20:05,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472134971] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:20:05,254 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 23:20:05,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-01-09 23:20:05,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913385848] [2022-01-09 23:20:05,255 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 23:20:05,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-09 23:20:05,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:20:05,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-09 23:20:05,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-01-09 23:20:05,256 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:20:05,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:20:05,334 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2022-01-09 23:20:05,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-09 23:20:05,334 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-09 23:20:05,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:20:05,335 INFO L225 Difference]: With dead ends: 63 [2022-01-09 23:20:05,335 INFO L226 Difference]: Without dead ends: 43 [2022-01-09 23:20:05,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2022-01-09 23:20:05,336 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 31 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:20:05,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 51 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:20:05,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-09 23:20:05,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2022-01-09 23:20:05,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:20:05,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-01-09 23:20:05,338 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 24 [2022-01-09 23:20:05,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:20:05,339 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-01-09 23:20:05,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:20:05,339 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-01-09 23:20:05,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-09 23:20:05,339 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:20:05,339 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:20:05,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-09 23:20:05,556 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 [2022-01-09 23:20:05,556 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:20:05,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:20:05,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1232945932, now seen corresponding path program 3 times [2022-01-09 23:20:05,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:20:05,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194019267] [2022-01-09 23:20:05,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:20:05,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:20:05,568 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 23:20:05,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [195541934] [2022-01-09 23:20:05,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-09 23:20:05,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:20:05,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:20:05,570 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) [2022-01-09 23:20:05,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-09 23:20:05,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-09 23:20:05,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:20:05,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 46 conjunts are in the unsatisfiable core [2022-01-09 23:20:05,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:20:05,705 INFO L353 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2022-01-09 23:20:05,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 54 [2022-01-09 23:20:05,711 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 28 treesize of output 31 [2022-01-09 23:20:05,736 INFO L353 Elim1Store]: treesize reduction 23, result has 54.0 percent of original size [2022-01-09 23:20:05,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 43 treesize of output 69 [2022-01-09 23:20:05,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 16 treesize of output 12 [2022-01-09 23:20:05,748 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 5 treesize of output 3 [2022-01-09 23:20:05,791 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 8 treesize of output 7 [2022-01-09 23:20:05,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 38 [2022-01-09 23:20:05,808 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 5 treesize of output 3 [2022-01-09 23:20:05,824 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 5 treesize of output 3 [2022-01-09 23:20:05,838 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-09 23:20:05,852 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 10 treesize of output 8 [2022-01-09 23:20:05,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:20:05,884 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-09 23:20:05,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-01-09 23:20:05,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:20:05,918 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-09 23:20:05,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-01-09 23:20:05,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:20:05,989 INFO L353 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-01-09 23:20:05,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 39 [2022-01-09 23:20:06,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:20:06,063 INFO L353 Elim1Store]: treesize reduction 115, result has 28.1 percent of original size [2022-01-09 23:20:06,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 45 treesize of output 67 [2022-01-09 23:20:06,315 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:20:06,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:20:08,437 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (or (< (+ |ULTIMATE.start_main_~i~0#1| 1) c_~N~0) (forall ((v_ArrVal_392 Int)) (= 5 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 8) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_392) (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|)))))) is different from false [2022-01-09 23:20:15,736 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_79| Int)) (or (forall ((v_ArrVal_388 Int) (|v_ULTIMATE.start_main_~i~0#1_76| Int) (v_ArrVal_392 Int)) (or (= 5 (let ((.cse1 (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|))) (select (store (let ((.cse2 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_79| 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_388))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse2) |c_ULTIMATE.start_main_~b~0#1.base|))) (store .cse0 .cse1 (+ (select .cse0 |c_ULTIMATE.start_main_~b~0#1.offset|) (select .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|))))) (+ (* |v_ULTIMATE.start_main_~i~0#1_76| 8) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_392) .cse1))) (<= (+ |v_ULTIMATE.start_main_~i~0#1_76| 1) |v_ULTIMATE.start_main_~i~0#1_79|))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_79|)))) is different from false [2022-01-09 23:20:17,768 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_388 Int) (v_ArrVal_387 Int) (|v_ULTIMATE.start_main_~i~0#1_79| Int) (|v_ULTIMATE.start_main_~i~0#1_76| Int) (v_ArrVal_392 Int)) (or (= 5 (let ((.cse1 (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|))) (select (store (let ((.cse2 (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_387) (+ (* |v_ULTIMATE.start_main_~i~0#1_79| 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_388))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse2) |c_ULTIMATE.start_main_~b~0#1.base|))) (store .cse0 .cse1 (+ (select .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|) (select .cse0 |c_ULTIMATE.start_main_~b~0#1.offset|))))) (+ (* |v_ULTIMATE.start_main_~i~0#1_76| 8) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_392) .cse1))) (<= (+ |v_ULTIMATE.start_main_~i~0#1_76| 1) |v_ULTIMATE.start_main_~i~0#1_79|) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_79|)))) is different from false [2022-01-09 23:20:17,782 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2022-01-09 23:20:17,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:20:17,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194019267] [2022-01-09 23:20:17,783 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 23:20:17,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195541934] [2022-01-09 23:20:17,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195541934] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:20:17,783 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 23:20:17,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2022-01-09 23:20:17,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355545995] [2022-01-09 23:20:17,783 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 23:20:17,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-09 23:20:17,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:20:17,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-09 23:20:17,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=339, Unknown=9, NotChecked=120, Total=552 [2022-01-09 23:20:17,784 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:20:19,797 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~i~0#1_79| Int)) (or (forall ((v_ArrVal_388 Int) (|v_ULTIMATE.start_main_~i~0#1_76| Int) (v_ArrVal_392 Int)) (or (= 5 (let ((.cse1 (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|))) (select (store (let ((.cse2 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_79| 8) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_388))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse2) |c_ULTIMATE.start_main_~b~0#1.base|))) (store .cse0 .cse1 (+ (select .cse0 |c_ULTIMATE.start_main_~b~0#1.offset|) (select .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|))))) (+ (* |v_ULTIMATE.start_main_~i~0#1_76| 8) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_392) .cse1))) (<= (+ |v_ULTIMATE.start_main_~i~0#1_76| 1) |v_ULTIMATE.start_main_~i~0#1_79|))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_79|)))) (= 0 |c_ULTIMATE.start_main_~b~0#1.offset|) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (= 4 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|)) (= |c_ULTIMATE.start_main_~i~0#1| 1)) is different from false [2022-01-09 23:20:21,814 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|))) (and (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (or (< (+ |ULTIMATE.start_main_~i~0#1| 1) c_~N~0) (forall ((v_ArrVal_392 Int)) (= 5 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 8) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_392) (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|)))))) (< 2 c_~N~0) (= 0 |c_ULTIMATE.start_main_~b~0#1.offset|) (= (+ 4 (select .cse0 |c_ULTIMATE.start_main_~b~0#1.offset|)) (select .cse0 (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|))) (exists ((|ULTIMATE.start_main_~a~0#1.base| Int)) (= (select (select |c_#memory_int| |ULTIMATE.start_main_~a~0#1.base|) 0) 4)) (= (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (= (select .cse0 0) 1) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (= 4 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|)) (= |c_ULTIMATE.start_main_~i~0#1| 1))) is different from false [2022-01-09 23:20:23,820 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|))) (and (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (or (< (+ |ULTIMATE.start_main_~i~0#1| 1) c_~N~0) (forall ((v_ArrVal_392 Int)) (= 5 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 8) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_392) (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|)))))) (< 2 c_~N~0) (= 0 |c_ULTIMATE.start_main_~b~0#1.offset|) (= (+ 4 (select .cse0 |c_ULTIMATE.start_main_~b~0#1.offset|)) (select .cse0 (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|))) (exists ((|ULTIMATE.start_main_~a~0#1.base| Int)) (= (select (select |c_#memory_int| |ULTIMATE.start_main_~a~0#1.base|) 0) 4)) (= (select .cse0 0) 1))) is different from false [2022-01-09 23:20:23,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:20:23,842 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2022-01-09 23:20:23,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-09 23:20:23,842 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-09 23:20:23,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:20:23,843 INFO L225 Difference]: With dead ends: 47 [2022-01-09 23:20:23,843 INFO L226 Difference]: Without dead ends: 45 [2022-01-09 23:20:23,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=100, Invalid=374, Unknown=12, NotChecked=270, Total=756 [2022-01-09 23:20:23,843 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 4 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:20:23,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 89 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 38 Invalid, 0 Unknown, 114 Unchecked, 0.0s Time] [2022-01-09 23:20:23,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-01-09 23:20:23,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2022-01-09 23:20:23,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 42 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:20:23,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2022-01-09 23:20:23,847 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 24 [2022-01-09 23:20:23,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:20:23,847 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2022-01-09 23:20:23,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:20:23,847 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2022-01-09 23:20:23,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-09 23:20:23,848 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:20:23,848 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:20:23,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-09 23:20:24,048 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 [2022-01-09 23:20:24,048 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:20:24,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:20:24,049 INFO L85 PathProgramCache]: Analyzing trace with hash -900609774, now seen corresponding path program 5 times [2022-01-09 23:20:24,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:20:24,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458807037] [2022-01-09 23:20:24,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:20:24,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:20:24,064 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 23:20:24,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1218332369] [2022-01-09 23:20:24,064 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-09 23:20:24,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:20:24,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:20:24,070 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) [2022-01-09 23:20:24,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-09 23:20:24,142 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-09 23:20:24,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:20:24,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-09 23:20:24,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:20:24,231 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:20:24,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:20:24,313 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:20:24,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:20:24,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458807037] [2022-01-09 23:20:24,314 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 23:20:24,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218332369] [2022-01-09 23:20:24,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218332369] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:20:24,314 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 23:20:24,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-01-09 23:20:24,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455507422] [2022-01-09 23:20:24,315 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 23:20:24,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-09 23:20:24,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:20:24,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-09 23:20:24,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-01-09 23:20:24,315 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:20:24,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:20:24,547 INFO L93 Difference]: Finished difference Result 128 states and 139 transitions. [2022-01-09 23:20:24,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-09 23:20:24,548 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-09 23:20:24,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:20:24,548 INFO L225 Difference]: With dead ends: 128 [2022-01-09 23:20:24,548 INFO L226 Difference]: Without dead ends: 111 [2022-01-09 23:20:24,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=268, Invalid=724, Unknown=0, NotChecked=0, Total=992 [2022-01-09 23:20:24,549 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 172 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:20:24,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 97 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:20:24,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-01-09 23:20:24,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 66. [2022-01-09 23:20:24,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.1384615384615384) internal successors, (74), 65 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:20:24,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2022-01-09 23:20:24,555 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 24 [2022-01-09 23:20:24,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:20:24,555 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2022-01-09 23:20:24,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:20:24,555 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2022-01-09 23:20:24,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-09 23:20:24,556 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:20:24,556 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:20:24,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-09 23:20:24,756 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 [2022-01-09 23:20:24,757 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:20:24,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:20:24,757 INFO L85 PathProgramCache]: Analyzing trace with hash 149788298, now seen corresponding path program 4 times [2022-01-09 23:20:24,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:20:24,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033784197] [2022-01-09 23:20:24,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:20:24,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:20:24,769 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 23:20:24,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1135158650] [2022-01-09 23:20:24,770 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-09 23:20:24,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:20:24,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:20:24,784 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) [2022-01-09 23:20:24,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-09 23:20:24,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-09 23:20:24,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:20:24,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-09 23:20:24,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:20:24,908 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-09 23:20:24,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:20:24,966 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-09 23:20:24,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:20:24,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033784197] [2022-01-09 23:20:24,967 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 23:20:24,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135158650] [2022-01-09 23:20:24,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135158650] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:20:24,967 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 23:20:24,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-01-09 23:20:24,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188419800] [2022-01-09 23:20:24,967 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 23:20:24,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-09 23:20:24,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:20:24,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-09 23:20:24,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-01-09 23:20:24,968 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:20:25,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:20:25,109 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2022-01-09 23:20:25,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-09 23:20:25,109 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-09 23:20:25,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:20:25,109 INFO L225 Difference]: With dead ends: 92 [2022-01-09 23:20:25,109 INFO L226 Difference]: Without dead ends: 79 [2022-01-09 23:20:25,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2022-01-09 23:20:25,110 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 46 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:20:25,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 80 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:20:25,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-01-09 23:20:25,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 59. [2022-01-09 23:20:25,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.103448275862069) internal successors, (64), 58 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:20:25,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2022-01-09 23:20:25,115 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 26 [2022-01-09 23:20:25,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:20:25,116 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2022-01-09 23:20:25,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:20:25,116 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2022-01-09 23:20:25,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-09 23:20:25,116 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:20:25,116 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:20:25,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-09 23:20:25,317 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 [2022-01-09 23:20:25,317 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:20:25,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:20:25,317 INFO L85 PathProgramCache]: Analyzing trace with hash -55017726, now seen corresponding path program 5 times [2022-01-09 23:20:25,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:20:25,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720226427] [2022-01-09 23:20:25,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:20:25,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:20:25,331 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 23:20:25,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1753062658] [2022-01-09 23:20:25,331 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-09 23:20:25,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:20:25,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:20:25,332 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) [2022-01-09 23:20:25,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-09 23:20:25,412 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-09 23:20:25,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:20:25,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 53 conjunts are in the unsatisfiable core [2022-01-09 23:20:25,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:20:25,446 INFO L353 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2022-01-09 23:20:25,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 54 [2022-01-09 23:20:25,449 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 28 treesize of output 31 [2022-01-09 23:20:25,471 INFO L353 Elim1Store]: treesize reduction 25, result has 51.9 percent of original size [2022-01-09 23:20:25,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 45 treesize of output 71 [2022-01-09 23:20:25,509 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 17 treesize of output 15 [2022-01-09 23:20:25,581 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 12 treesize of output 11 [2022-01-09 23:20:25,594 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 11 treesize of output 7 [2022-01-09 23:20:25,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 26 treesize of output 20 [2022-01-09 23:20:25,615 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 15 treesize of output 11 [2022-01-09 23:20:25,632 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 10 treesize of output 8 [2022-01-09 23:20:25,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-09 23:20:25,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:20:25,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 39 [2022-01-09 23:20:25,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:20:25,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:20:25,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:20:25,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 44 [2022-01-09 23:20:25,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-09 23:20:25,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:20:25,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:20:25,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 58 [2022-01-09 23:20:25,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:20:25,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:20:25,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:20:25,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 56 [2022-01-09 23:20:26,233 INFO L353 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-01-09 23:20:26,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 10 case distinctions, treesize of input 77 treesize of output 41 [2022-01-09 23:20:26,247 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:20:26,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:20:46,825 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:20:46,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:20:46,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720226427] [2022-01-09 23:20:46,826 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 23:20:46,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753062658] [2022-01-09 23:20:46,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753062658] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:20:46,826 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 23:20:46,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2022-01-09 23:20:46,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361401933] [2022-01-09 23:20:46,826 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 23:20:46,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-09 23:20:46,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:20:46,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-09 23:20:46,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=629, Unknown=10, NotChecked=0, Total=756 [2022-01-09 23:20:46,828 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:20:48,875 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse7 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (and (forall ((|v_ULTIMATE.start_main_~i~0#1_119| Int)) (or (forall ((v_ArrVal_529 Int)) (let ((.cse6 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_119|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_529))) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse6))) (let ((.cse5 (select .cse3 |c_ULTIMATE.start_main_~b~0#1.base|))) (let ((.cse2 (select .cse5 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse4 (select .cse6 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse1 (store .cse5 (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|) (+ .cse2 .cse4)))) (let ((.cse0 (+ .cse2 (select (select (store .cse3 |c_ULTIMATE.start_main_~b~0#1.base| .cse1) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) .cse4))) (or (= .cse0 13) (not (= (select (store .cse1 (+ 16 |c_ULTIMATE.start_main_~b~0#1.offset|) .cse0) |c_ULTIMATE.start_main_~b~0#1.offset|) 1)))))))))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_119|)))) (= 0 |c_ULTIMATE.start_main_~b~0#1.offset|) (<= 1 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|)) (= (select .cse7 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) 8) (not (= |c_ULTIMATE.start_main_~b~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (= 4 (select .cse7 |c_ULTIMATE.start_main_~a~0#1.offset|)))) is different from false [2022-01-09 23:20:49,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:20:49,210 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2022-01-09 23:20:49,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-09 23:20:49,210 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-09 23:20:49,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:20:49,210 INFO L225 Difference]: With dead ends: 61 [2022-01-09 23:20:49,210 INFO L226 Difference]: Without dead ends: 42 [2022-01-09 23:20:49,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 22.9s TimeCoverageRelationStatistics Valid=153, Invalid=832, Unknown=11, NotChecked=60, Total=1056 [2022-01-09 23:20:49,211 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 12 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:20:49,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 108 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 114 Invalid, 0 Unknown, 77 Unchecked, 0.1s Time] [2022-01-09 23:20:49,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-09 23:20:49,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-01-09 23:20:49,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 41 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:20:49,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2022-01-09 23:20:49,215 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 28 [2022-01-09 23:20:49,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:20:49,215 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2022-01-09 23:20:49,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:20:49,215 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2022-01-09 23:20:49,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-09 23:20:49,215 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:20:49,215 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:20:49,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-09 23:20:49,416 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 [2022-01-09 23:20:49,416 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:20:49,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:20:49,416 INFO L85 PathProgramCache]: Analyzing trace with hash 48972360, now seen corresponding path program 6 times [2022-01-09 23:20:49,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:20:49,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458242773] [2022-01-09 23:20:49,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:20:49,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:20:49,442 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 23:20:49,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [985088902] [2022-01-09 23:20:49,442 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-09 23:20:49,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:20:49,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:20:49,451 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) [2022-01-09 23:20:49,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-09 23:20:49,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-09 23:20:49,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:20:49,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 56 conjunts are in the unsatisfiable core [2022-01-09 23:20:49,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:20:49,575 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 10 treesize of output 8 [2022-01-09 23:20:49,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:20:49,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-01-09 23:20:49,582 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 8 treesize of output 7 [2022-01-09 23:20:49,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-01-09 23:20:49,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:20:49,610 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-09 23:20:49,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-01-09 23:20:49,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:20:49,647 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-09 23:20:49,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-01-09 23:20:49,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:20:49,687 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-09 23:20:49,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-01-09 23:20:49,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:20:49,783 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-09 23:20:49,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 32 [2022-01-09 23:20:49,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:20:49,852 INFO L353 Elim1Store]: treesize reduction 78, result has 33.9 percent of original size [2022-01-09 23:20:49,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 62 [2022-01-09 23:20:49,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:20:49,972 INFO L353 Elim1Store]: treesize reduction 42, result has 40.8 percent of original size [2022-01-09 23:20:49,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 74 [2022-01-09 23:20:50,318 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-09 23:20:50,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 52 treesize of output 32 [2022-01-09 23:20:50,333 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 23:20:50,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:20:52,533 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (or (forall ((v_ArrVal_598 Int) (v_ArrVal_595 Int)) (= (select (let ((.cse0 (* |ULTIMATE.start_main_~i~0#1| 8))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ .cse0 |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_595) (+ .cse0 8 |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_598)) (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|)) 5)) (not (< (+ |ULTIMATE.start_main_~i~0#1| 1) c_~N~0)) (< (+ 2 |ULTIMATE.start_main_~i~0#1|) c_~N~0))) is different from false [2022-01-09 23:20:53,251 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_598 Int) (|v_ULTIMATE.start_main_~i~0#1_132| Int) (v_ArrVal_595 Int)) (or (not (< (+ |v_ULTIMATE.start_main_~i~0#1_132| 1) c_~N~0)) (= (select (let ((.cse2 (* 8 |v_ULTIMATE.start_main_~i~0#1_132|))) (store (store (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|)) (.cse1 (* 8 |c_ULTIMATE.start_main_~i~0#1|))) (store .cse0 (+ .cse1 |c_ULTIMATE.start_main_~b~0#1.offset|) (+ (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse1 |c_ULTIMATE.start_main_~a~0#1.offset| (- 8))) (select .cse0 (+ .cse1 (- 8) |c_ULTIMATE.start_main_~b~0#1.offset|))))) (+ .cse2 |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_595) (+ 8 .cse2 |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_598)) (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|)) 5) (< (+ 2 |v_ULTIMATE.start_main_~i~0#1_132|) c_~N~0))) is different from false [2022-01-09 23:20:54,619 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2022-01-09 23:20:54,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:20:54,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458242773] [2022-01-09 23:20:54,620 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 23:20:54,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985088902] [2022-01-09 23:20:54,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985088902] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:20:54,620 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 23:20:54,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 35 [2022-01-09 23:20:54,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328281296] [2022-01-09 23:20:54,620 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 23:20:54,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-09 23:20:54,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:20:54,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-09 23:20:54,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=905, Unknown=3, NotChecked=126, Total=1190 [2022-01-09 23:20:54,622 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 35 states, 35 states have (on average 1.4285714285714286) internal successors, (50), 35 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:20:57,081 WARN L838 $PredicateComparison]: unable to prove that (and (<= c_~N~0 4) (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (or (forall ((v_ArrVal_598 Int) (v_ArrVal_595 Int)) (= (select (let ((.cse0 (* |ULTIMATE.start_main_~i~0#1| 8))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ .cse0 |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_595) (+ .cse0 8 |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_598)) (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|)) 5)) (not (< (+ |ULTIMATE.start_main_~i~0#1| 1) c_~N~0)) (< (+ 2 |ULTIMATE.start_main_~i~0#1|) c_~N~0))) (= 0 |c_ULTIMATE.start_main_~b~0#1.offset|) (exists ((|ULTIMATE.start_main_~a~0#1.base| Int)) (let ((.cse1 (select (select |c_#memory_int| |ULTIMATE.start_main_~a~0#1.base|) 0))) (and (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|))) (= (+ .cse1 (select .cse2 |c_ULTIMATE.start_main_~b~0#1.offset|)) (select .cse2 (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|)))) (= .cse1 4)))) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|) 1) (<= |c_ULTIMATE.start_main_~i~0#1| 4) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (= 4 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|)) (< 3 c_~N~0)) is different from false [2022-01-09 23:20:59,084 WARN L838 $PredicateComparison]: unable to prove that (and (<= c_~N~0 4) (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (or (forall ((v_ArrVal_598 Int) (v_ArrVal_595 Int)) (= (select (let ((.cse0 (* |ULTIMATE.start_main_~i~0#1| 8))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ .cse0 |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_595) (+ .cse0 8 |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_598)) (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|)) 5)) (not (< (+ |ULTIMATE.start_main_~i~0#1| 1) c_~N~0)) (< (+ 2 |ULTIMATE.start_main_~i~0#1|) c_~N~0))) (= 0 |c_ULTIMATE.start_main_~b~0#1.offset|) (exists ((|ULTIMATE.start_main_~a~0#1.base| Int)) (let ((.cse1 (select (select |c_#memory_int| |ULTIMATE.start_main_~a~0#1.base|) 0))) (and (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|))) (= (+ .cse1 (select .cse2 |c_ULTIMATE.start_main_~b~0#1.offset|)) (select .cse2 (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|)))) (= .cse1 4)))) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|) 1) (< 3 c_~N~0)) is different from false [2022-01-09 23:20:59,799 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_598 Int) (|v_ULTIMATE.start_main_~i~0#1_132| Int) (v_ArrVal_595 Int)) (or (not (< (+ |v_ULTIMATE.start_main_~i~0#1_132| 1) c_~N~0)) (= (select (let ((.cse2 (* 8 |v_ULTIMATE.start_main_~i~0#1_132|))) (store (store (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|)) (.cse1 (* 8 |c_ULTIMATE.start_main_~i~0#1|))) (store .cse0 (+ .cse1 |c_ULTIMATE.start_main_~b~0#1.offset|) (+ (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse1 |c_ULTIMATE.start_main_~a~0#1.offset| (- 8))) (select .cse0 (+ .cse1 (- 8) |c_ULTIMATE.start_main_~b~0#1.offset|))))) (+ .cse2 |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_595) (+ 8 .cse2 |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_598)) (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|)) 5) (< (+ 2 |v_ULTIMATE.start_main_~i~0#1_132|) c_~N~0))) (or (forall ((v_ArrVal_598 Int) (|v_ULTIMATE.start_main_~i~0#1_132| Int) (v_ArrVal_595 Int)) (or (not (< (+ |v_ULTIMATE.start_main_~i~0#1_132| 1) c_~N~0)) (= 5 (let ((.cse4 (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|))) (select (let ((.cse5 (* 8 |v_ULTIMATE.start_main_~i~0#1_132|))) (store (store (let ((.cse3 (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|))) (store .cse3 .cse4 (+ (select .cse3 |c_ULTIMATE.start_main_~b~0#1.offset|) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|)))) (+ .cse5 |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_595) (+ 8 .cse5 |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_598)) .cse4))) (< (+ 2 |v_ULTIMATE.start_main_~i~0#1_132|) c_~N~0))) (< |c_ULTIMATE.start_main_~i~0#1| c_~N~0))) is different from false [2022-01-09 23:20:59,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:20:59,860 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2022-01-09 23:20:59,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-09 23:20:59,861 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.4285714285714286) internal successors, (50), 35 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-09 23:20:59,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:20:59,861 INFO L225 Difference]: With dead ends: 69 [2022-01-09 23:20:59,861 INFO L226 Difference]: Without dead ends: 67 [2022-01-09 23:20:59,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=197, Invalid=1149, Unknown=6, NotChecked=370, Total=1722 [2022-01-09 23:20:59,862 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 7 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 161 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:20:59,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 109 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 39 Invalid, 0 Unknown, 161 Unchecked, 0.1s Time] [2022-01-09 23:20:59,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-09 23:20:59,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2022-01-09 23:20:59,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 58 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:20:59,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2022-01-09 23:20:59,870 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 28 [2022-01-09 23:20:59,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:20:59,871 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2022-01-09 23:20:59,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.4285714285714286) internal successors, (50), 35 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 23:20:59,871 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2022-01-09 23:20:59,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-09 23:20:59,873 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:20:59,874 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:20:59,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-09 23:21:00,087 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 [2022-01-09 23:21:00,087 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:21:00,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:21:00,088 INFO L85 PathProgramCache]: Analyzing trace with hash 778799246, now seen corresponding path program 6 times [2022-01-09 23:21:00,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:21:00,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882026985] [2022-01-09 23:21:00,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:21:00,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:21:00,098 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 23:21:00,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1751154298] [2022-01-09 23:21:00,098 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-09 23:21:00,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:21:00,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:21:00,103 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) [2022-01-09 23:21:00,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-09 23:21:00,237 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-09 23:21:00,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:21:00,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 41 conjunts are in the unsatisfiable core [2022-01-09 23:21:00,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:21:00,264 INFO L353 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-01-09 23:21:00,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 treesize of output 51 [2022-01-09 23:21:00,268 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 8 treesize of output 7 [2022-01-09 23:21:00,271 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 8 treesize of output 7 [2022-01-09 23:21:00,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 11 [2022-01-09 23:21:00,288 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 5 treesize of output 3 [2022-01-09 23:21:00,306 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 10 treesize of output 8 [2022-01-09 23:21:00,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-01-09 23:21:00,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-01-09 23:21:00,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-01-09 23:21:00,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-01-09 23:21:00,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:21:00,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-01-09 23:21:00,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:21:00,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-01-09 23:21:00,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:21:00,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-01-09 23:21:00,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-09 23:21:00,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-01-09 23:21:00,522 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-09 23:21:00,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:21:02,584 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_144| Int)) (or (forall ((v_ArrVal_668 Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_144|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_668) |c_ULTIMATE.start_main_~b~0#1.offset|) 1)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_144|)))) is different from false [2022-01-09 23:21:04,630 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_145| Int)) (or (forall ((|v_ULTIMATE.start_main_~i~0#1_144| Int) (v_ArrVal_668 Int) (v_ArrVal_666 Int)) (or (= (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_145|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_666) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_144|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_668) |c_ULTIMATE.start_main_~b~0#1.offset|) 1) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_145| 1) |v_ULTIMATE.start_main_~i~0#1_144|)))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_145|)))) is different from false [2022-01-09 23:21:06,656 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_665 Int) (|v_ULTIMATE.start_main_~i~0#1_145| Int) (|v_ULTIMATE.start_main_~i~0#1_144| Int) (v_ArrVal_668 Int) (v_ArrVal_666 Int)) (or (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_145| 1) |v_ULTIMATE.start_main_~i~0#1_144|)) (= (select (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_665) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_145|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_666) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_144|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_668) |c_ULTIMATE.start_main_~b~0#1.offset|) 1) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_145|)))) is different from false [2022-01-09 23:21:08,682 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_665 Int) (|v_ULTIMATE.start_main_~i~0#1_145| Int) (|v_ULTIMATE.start_main_~i~0#1_144| Int) (v_ArrVal_668 Int) (v_ArrVal_666 Int)) (or (= (select (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) 8 |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_665) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_145|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_666) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_144|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_668) |c_ULTIMATE.start_main_~b~0#1.offset|) 1) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_145| 1) |v_ULTIMATE.start_main_~i~0#1_144|)) (not (<= (+ 2 |c_ULTIMATE.start_main_~i~0#1|) |v_ULTIMATE.start_main_~i~0#1_145|)))) is different from false [2022-01-09 23:21:10,710 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_665 Int) (v_ArrVal_663 Int) (|v_ULTIMATE.start_main_~i~0#1_145| Int) (|v_ULTIMATE.start_main_~i~0#1_144| Int) (v_ArrVal_668 Int) (v_ArrVal_666 Int)) (or (= (select (store (store (let ((.cse0 (* 8 |c_ULTIMATE.start_main_~i~0#1|))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ .cse0 |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_663) (+ .cse0 8 |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_665)) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_145|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_666) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_144|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_668) |c_ULTIMATE.start_main_~b~0#1.offset|) 1) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_145| 1) |v_ULTIMATE.start_main_~i~0#1_144|)) (not (<= (+ 2 |c_ULTIMATE.start_main_~i~0#1|) |v_ULTIMATE.start_main_~i~0#1_145|)))) is different from false [2022-01-09 23:21:11,084 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_665 Int) (v_ArrVal_663 Int) (|v_ULTIMATE.start_main_~i~0#1_145| Int) (|v_ULTIMATE.start_main_~i~0#1_144| Int) (v_ArrVal_668 Int) (v_ArrVal_666 Int)) (or (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_145| 1) |v_ULTIMATE.start_main_~i~0#1_144|)) (= (select (store (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_663) (+ 16 |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_665) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_145|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_666) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_144|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_668) |c_ULTIMATE.start_main_~b~0#1.offset|) 1) (not (<= 3 |v_ULTIMATE.start_main_~i~0#1_145|)))) is different from false [2022-01-09 23:21:11,136 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_665 Int) (v_ArrVal_663 Int) (|v_ULTIMATE.start_main_~i~0#1_145| Int) (|v_ULTIMATE.start_main_~i~0#1_144| Int) (v_ArrVal_661 (Array Int Int)) (v_ArrVal_668 Int) (v_ArrVal_666 Int)) (or (= (select (store (store (store (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_661) |c_ULTIMATE.start_main_~b~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_663) (+ 16 |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_665) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_145|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_666) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_144|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_668) |c_ULTIMATE.start_main_~b~0#1.offset|) 1) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_145| 1) |v_ULTIMATE.start_main_~i~0#1_144|)) (not (<= 3 |v_ULTIMATE.start_main_~i~0#1_145|)))) is different from false [2022-01-09 23:21:11,254 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 20 not checked. [2022-01-09 23:21:11,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:21:11,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882026985] [2022-01-09 23:21:11,255 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 23:21:11,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751154298] [2022-01-09 23:21:11,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751154298] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:21:11,255 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 23:21:11,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 22 [2022-01-09 23:21:11,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313170981] [2022-01-09 23:21:11,255 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 23:21:11,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-09 23:21:11,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:21:11,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-09 23:21:11,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=158, Unknown=7, NotChecked=224, Total=462 [2022-01-09 23:21:11,256 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)