/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/array-tiling/poly1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 09:03:03,351 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 09:03:03,352 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 09:03:03,408 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 09:03:03,408 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 09:03:03,409 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 09:03:03,410 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 09:03:03,412 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 09:03:03,413 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 09:03:03,414 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 09:03:03,415 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 09:03:03,415 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 09:03:03,416 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 09:03:03,416 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 09:03:03,417 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 09:03:03,418 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 09:03:03,419 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 09:03:03,421 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 09:03:03,422 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 09:03:03,423 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 09:03:03,425 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 09:03:03,431 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 09:03:03,434 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 09:03:03,435 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 09:03:03,444 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 09:03:03,453 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 09:03:03,454 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 09:03:03,454 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 09:03:03,456 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 09:03:03,466 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 09:03:03,467 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 09:03:03,468 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 09:03:03,468 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 09:03:03,468 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 09:03:03,468 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 09:03:03,469 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 09:03:03,469 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 09:03:03,469 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 09:03:03,469 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 09:03:03,469 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 09:03:03,470 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 09:03:03,470 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 09:03:03,470 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 09:03:03,470 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 09:03:03,470 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 09:03:03,470 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 09:03:03,470 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 09:03:03,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 09:03:03,471 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 09:03:03,471 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 09:03:03,471 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 09:03:03,471 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 09:03:03,713 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 09:03:03,739 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 09:03:03,741 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 09:03:03,742 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 09:03:03,743 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 09:03:03,744 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/poly1.c [2022-01-31 09:03:03,800 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af78128d5/9a474314ab1b40cc84ad28dbe3f18500/FLAG6cc0ee186 [2022-01-31 09:03:04,154 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 09:03:04,155 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/poly1.c [2022-01-31 09:03:04,160 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af78128d5/9a474314ab1b40cc84ad28dbe3f18500/FLAG6cc0ee186 [2022-01-31 09:03:04,567 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af78128d5/9a474314ab1b40cc84ad28dbe3f18500 [2022-01-31 09:03:04,569 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 09:03:04,571 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 09:03:04,576 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 09:03:04,576 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 09:03:04,582 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 09:03:04,582 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:03:04" (1/1) ... [2022-01-31 09:03:04,583 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@125c5046 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:03:04, skipping insertion in model container [2022-01-31 09:03:04,583 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:03:04" (1/1) ... [2022-01-31 09:03:04,591 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 09:03:04,603 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 09:03:04,781 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/poly1.c[396,409] [2022-01-31 09:03:04,797 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 09:03:04,805 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 09:03:04,818 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/poly1.c[396,409] [2022-01-31 09:03:04,830 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 09:03:04,869 INFO L208 MainTranslator]: Completed translation [2022-01-31 09:03:04,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:03:04 WrapperNode [2022-01-31 09:03:04,869 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 09:03:04,871 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 09:03:04,871 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 09:03:04,871 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 09:03:04,892 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:03:04" (1/1) ... [2022-01-31 09:03:04,892 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:03:04" (1/1) ... [2022-01-31 09:03:04,899 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:03:04" (1/1) ... [2022-01-31 09:03:04,899 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:03:04" (1/1) ... [2022-01-31 09:03:04,913 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:03:04" (1/1) ... [2022-01-31 09:03:04,918 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:03:04" (1/1) ... [2022-01-31 09:03:04,922 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:03:04" (1/1) ... [2022-01-31 09:03:04,925 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 09:03:04,926 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 09:03:04,926 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 09:03:04,926 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 09:03:04,927 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:03:04" (1/1) ... [2022-01-31 09:03:04,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 09:03:04,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:03:04,965 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 09:03:04,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 09:03:05,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 09:03:05,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 09:03:05,001 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 09:03:05,001 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 09:03:05,002 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 09:03:05,002 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 09:03:05,002 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 09:03:05,002 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 09:03:05,002 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 09:03:05,002 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 09:03:05,003 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 09:03:05,003 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 09:03:05,003 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 09:03:05,003 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-01-31 09:03:05,003 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 09:03:05,004 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-31 09:03:05,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 09:03:05,005 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 09:03:05,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 09:03:05,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 09:03:05,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 09:03:05,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 09:03:05,080 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 09:03:05,082 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 09:03:05,233 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 09:03:05,237 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 09:03:05,238 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 09:03:05,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:03:05 BoogieIcfgContainer [2022-01-31 09:03:05,239 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 09:03:05,240 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 09:03:05,240 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 09:03:05,241 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 09:03:05,243 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:03:05" (1/1) ... [2022-01-31 09:03:05,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 09:03:05 BasicIcfg [2022-01-31 09:03:05,273 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 09:03:05,274 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 09:03:05,275 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 09:03:05,290 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 09:03:05,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 09:03:04" (1/4) ... [2022-01-31 09:03:05,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b7046a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:03:05, skipping insertion in model container [2022-01-31 09:03:05,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:03:04" (2/4) ... [2022-01-31 09:03:05,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b7046a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:03:05, skipping insertion in model container [2022-01-31 09:03:05,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:03:05" (3/4) ... [2022-01-31 09:03:05,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b7046a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 09:03:05, skipping insertion in model container [2022-01-31 09:03:05,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 09:03:05" (4/4) ... [2022-01-31 09:03:05,293 INFO L111 eAbstractionObserver]: Analyzing ICFG poly1.cJordan [2022-01-31 09:03:05,298 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 09:03:05,298 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 09:03:05,345 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 09:03:05,353 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 09:03:05,354 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 09:03:05,367 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 09:03:05,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 09:03:05,377 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:03:05,377 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:03:05,378 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:03:05,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:03:05,384 INFO L85 PathProgramCache]: Analyzing trace with hash -15457881, now seen corresponding path program 1 times [2022-01-31 09:03:05,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:03:05,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411114965] [2022-01-31 09:03:05,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:03:05,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:03:05,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:05,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:03:05,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:05,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:03:05,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:03:05,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411114965] [2022-01-31 09:03:05,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411114965] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:03:05,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:03:05,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 09:03:05,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648266138] [2022-01-31 09:03:05,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:03:05,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 09:03:05,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:03:05,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 09:03:05,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 09:03:05,624 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:03:05,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:03:05,672 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2022-01-31 09:03:05,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 09:03:05,675 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-01-31 09:03:05,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:03:05,682 INFO L225 Difference]: With dead ends: 25 [2022-01-31 09:03:05,682 INFO L226 Difference]: Without dead ends: 20 [2022-01-31 09:03:05,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 09:03:05,687 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 5 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:03:05,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 31 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:03:05,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-01-31 09:03:05,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-01-31 09:03:05,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 09:03:05,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-01-31 09:03:05,713 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 14 [2022-01-31 09:03:05,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:03:05,713 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-01-31 09:03:05,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:03:05,713 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-01-31 09:03:05,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-31 09:03:05,714 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:03:05,714 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:03:05,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 09:03:05,714 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:03:05,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:03:05,715 INFO L85 PathProgramCache]: Analyzing trace with hash 872045800, now seen corresponding path program 1 times [2022-01-31 09:03:05,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:03:05,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147323221] [2022-01-31 09:03:05,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:03:05,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:03:05,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:05,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 09:03:05,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:05,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:03:05,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:03:05,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147323221] [2022-01-31 09:03:05,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147323221] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 09:03:05,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 09:03:05,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 09:03:05,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347352854] [2022-01-31 09:03:05,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 09:03:05,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 09:03:05,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:03:05,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 09:03:05,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 09:03:05,793 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:03:05,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:03:05,828 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2022-01-31 09:03:05,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 09:03:05,829 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-01-31 09:03:05,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:03:05,830 INFO L225 Difference]: With dead ends: 22 [2022-01-31 09:03:05,830 INFO L226 Difference]: Without dead ends: 22 [2022-01-31 09:03:05,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 09:03:05,831 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 6 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:03:05,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 27 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:03:05,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-01-31 09:03:05,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-01-31 09:03:05,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 09:03:05,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-01-31 09:03:05,836 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 14 [2022-01-31 09:03:05,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:03:05,837 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-01-31 09:03:05,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:03:05,837 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-01-31 09:03:05,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-31 09:03:05,838 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:03:05,838 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:03:05,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 09:03:05,838 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:03:05,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:03:05,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1767986565, now seen corresponding path program 1 times [2022-01-31 09:03:05,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:03:05,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128710980] [2022-01-31 09:03:05,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:03:05,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:03:05,856 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:03:05,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1688733913] [2022-01-31 09:03:05,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:03:05,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:03:05,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:03:05,863 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:03:05,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 09:03:05,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:05,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-31 09:03:05,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:03:06,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:03:06,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:03:06,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:03:06,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:03:06,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128710980] [2022-01-31 09:03:06,131 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:03:06,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688733913] [2022-01-31 09:03:06,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688733913] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:03:06,131 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:03:06,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-31 09:03:06,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376416337] [2022-01-31 09:03:06,133 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:03:06,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 09:03:06,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:03:06,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 09:03:06,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-31 09:03:06,136 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:03:06,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:03:06,176 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2022-01-31 09:03:06,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 09:03:06,177 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), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-01-31 09:03:06,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:03:06,178 INFO L225 Difference]: With dead ends: 24 [2022-01-31 09:03:06,178 INFO L226 Difference]: Without dead ends: 24 [2022-01-31 09:03:06,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-31 09:03:06,180 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 5 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 09:03:06,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 30 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 09:03:06,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-31 09:03:06,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-01-31 09:03:06,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 09:03:06,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2022-01-31 09:03:06,184 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 16 [2022-01-31 09:03:06,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:03:06,184 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2022-01-31 09:03:06,185 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), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:03:06,185 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2022-01-31 09:03:06,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-31 09:03:06,185 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:03:06,185 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:03:06,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-31 09:03:06,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:03:06,400 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:03:06,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:03:06,400 INFO L85 PathProgramCache]: Analyzing trace with hash -521364766, now seen corresponding path program 2 times [2022-01-31 09:03:06,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:03:06,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167850546] [2022-01-31 09:03:06,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:03:06,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:03:06,417 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:03:06,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1874331905] [2022-01-31 09:03:06,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:03:06,418 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:03:06,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:03:06,419 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:03:06,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 09:03:06,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:03:06,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:03:06,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-31 09:03:06,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:03:06,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 49 [2022-01-31 09:03:06,565 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 09:03:06,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-01-31 09:03:06,667 INFO L353 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-01-31 09:03:06,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2022-01-31 09:03:06,728 INFO L353 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2022-01-31 09:03:06,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 26 [2022-01-31 09:03:06,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:03:06,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:03:07,068 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 49 treesize of output 45 [2022-01-31 09:03:07,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 09:03:07,080 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 09:03:07,081 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 2 case distinctions, treesize of input 45 treesize of output 52 [2022-01-31 09:03:07,108 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 14 treesize of output 6 [2022-01-31 09:03:07,151 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 6 [2022-01-31 09:03:07,197 INFO L353 Elim1Store]: treesize reduction 39, result has 23.5 percent of original size [2022-01-31 09:03:07,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 70 [2022-01-31 09:03:07,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:03:07,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:03:07,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167850546] [2022-01-31 09:03:07,289 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:03:07,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874331905] [2022-01-31 09:03:07,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874331905] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:03:07,292 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:03:07,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2022-01-31 09:03:07,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140334988] [2022-01-31 09:03:07,293 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:03:07,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 09:03:07,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:03:07,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 09:03:07,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-01-31 09:03:07,296 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:03:07,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:03:07,424 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-01-31 09:03:07,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 09:03:07,425 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-01-31 09:03:07,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:03:07,427 INFO L225 Difference]: With dead ends: 42 [2022-01-31 09:03:07,427 INFO L226 Difference]: Without dead ends: 42 [2022-01-31 09:03:07,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-01-31 09:03:07,429 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 18 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:03:07,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 124 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 83 Invalid, 0 Unknown, 20 Unchecked, 0.1s Time] [2022-01-31 09:03:07,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-31 09:03:07,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 32. [2022-01-31 09:03:07,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 09:03:07,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2022-01-31 09:03:07,437 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 18 [2022-01-31 09:03:07,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:03:07,437 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2022-01-31 09:03:07,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 09:03:07,438 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2022-01-31 09:03:07,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 09:03:07,438 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:03:07,439 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:03:07,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 09:03:07,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-31 09:03:07,663 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:03:07,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:03:07,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1564738305, now seen corresponding path program 3 times [2022-01-31 09:03:07,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:03:07,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35081830] [2022-01-31 09:03:07,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:03:07,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:03:07,676 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:03:07,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1966257846] [2022-01-31 09:03:07,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 09:03:07,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:03:07,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:03:07,679 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:03:07,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 09:03:07,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-31 09:03:07,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:03:07,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-31 09:03:07,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:03:07,927 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 49 [2022-01-31 09:03:07,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-01-31 09:03:07,937 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 09:03:08,000 INFO L353 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-01-31 09:03:08,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2022-01-31 09:03:08,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 50 [2022-01-31 09:03:08,058 INFO L353 Elim1Store]: treesize reduction 46, result has 29.2 percent of original size [2022-01-31 09:03:08,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 69 [2022-01-31 09:03:08,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:03:08,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2022-01-31 09:03:08,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:03:08,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 32 [2022-01-31 09:03:08,250 INFO L353 Elim1Store]: treesize reduction 48, result has 5.9 percent of original size [2022-01-31 09:03:08,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 27 [2022-01-31 09:03:08,299 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:03:08,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:03:10,623 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((aux_div_main_~i~0_26 Int) (aux_mod_main_~i~0_26 Int) (v_ArrVal_50 Int)) (let ((.cse0 (* 4294967296 aux_div_main_~i~0_26))) (or (< aux_mod_main_~i~0_26 0) (< (+ .cse0 1 aux_mod_main_~i~0_26) c_~SIZE~0) (= (select (store (select |c_#memory_int| c_main_~a~0.base) (+ c_main_~a~0.offset (* 8 (mod aux_mod_main_~i~0_26 4294967296))) v_ArrVal_50) c_main_~a~0.offset) 0) (<= c_~SIZE~0 (+ .cse0 aux_mod_main_~i~0_26)) (< 2147483647 aux_mod_main_~i~0_26)))) (forall ((aux_div_main_~i~0_26 Int) (aux_mod_main_~i~0_26 Int) (v_ArrVal_50 Int)) (let ((.cse1 (* 4294967296 aux_div_main_~i~0_26))) (or (< (+ .cse1 1 aux_mod_main_~i~0_26) c_~SIZE~0) (<= aux_mod_main_~i~0_26 2147483647) (<= c_~SIZE~0 (+ .cse1 aux_mod_main_~i~0_26)) (= (select (store (select |c_#memory_int| c_main_~a~0.base) (+ c_main_~a~0.offset (* 8 (mod aux_mod_main_~i~0_26 4294967296)) (- 34359738368)) v_ArrVal_50) c_main_~a~0.offset) 0) (<= 4294967296 aux_mod_main_~i~0_26))))) is different from false [2022-01-31 09:03:12,280 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((aux_div_main_~i~0_26 Int) (aux_mod_main_~i~0_26 Int)) (let ((.cse0 (* 4294967296 aux_div_main_~i~0_26))) (or (< aux_mod_main_~i~0_26 0) (< (+ .cse0 1 aux_mod_main_~i~0_26) c_~SIZE~0) (<= c_~SIZE~0 (+ .cse0 aux_mod_main_~i~0_26)) (< 2147483647 aux_mod_main_~i~0_26) (let ((.cse1 (<= (mod c_main_~i~0 4294967296) 2147483647))) (and (or (not .cse1) (forall ((v_ArrVal_48 Int) (v_ArrVal_50 Int)) (= (select (store (store (select |c_#memory_int| c_main_~a~0.base) (+ c_main_~a~0.offset (* (mod c_main_~i~0 4294967296) 8)) v_ArrVal_48) (+ c_main_~a~0.offset (* 8 (mod aux_mod_main_~i~0_26 4294967296))) v_ArrVal_50) c_main_~a~0.offset) 0))) (or .cse1 (forall ((v_ArrVal_48 Int) (v_ArrVal_50 Int)) (= (select (store (store (select |c_#memory_int| c_main_~a~0.base) (+ c_main_~a~0.offset (* (mod c_main_~i~0 4294967296) 8) (- 34359738368)) v_ArrVal_48) (+ c_main_~a~0.offset (* 8 (mod aux_mod_main_~i~0_26 4294967296))) v_ArrVal_50) c_main_~a~0.offset) 0)))))))) (forall ((aux_div_main_~i~0_26 Int) (aux_mod_main_~i~0_26 Int)) (let ((.cse3 (* 4294967296 aux_div_main_~i~0_26))) (or (let ((.cse2 (<= (mod c_main_~i~0 4294967296) 2147483647))) (and (or .cse2 (forall ((v_ArrVal_48 Int) (v_ArrVal_50 Int)) (= (select (store (store (select |c_#memory_int| c_main_~a~0.base) (+ c_main_~a~0.offset (* (mod c_main_~i~0 4294967296) 8) (- 34359738368)) v_ArrVal_48) (+ c_main_~a~0.offset (* 8 (mod aux_mod_main_~i~0_26 4294967296)) (- 34359738368)) v_ArrVal_50) c_main_~a~0.offset) 0))) (or (not .cse2) (forall ((v_ArrVal_48 Int) (v_ArrVal_50 Int)) (= (select (store (store (select |c_#memory_int| c_main_~a~0.base) (+ c_main_~a~0.offset (* (mod c_main_~i~0 4294967296) 8)) v_ArrVal_48) (+ c_main_~a~0.offset (* 8 (mod aux_mod_main_~i~0_26 4294967296)) (- 34359738368)) v_ArrVal_50) c_main_~a~0.offset) 0))))) (< (+ .cse3 1 aux_mod_main_~i~0_26) c_~SIZE~0) (<= aux_mod_main_~i~0_26 2147483647) (<= c_~SIZE~0 (+ .cse3 aux_mod_main_~i~0_26)) (<= 4294967296 aux_mod_main_~i~0_26))))) is different from false [2022-01-31 09:03:13,748 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((aux_div_main_~i~0_26 Int) (aux_mod_main_~i~0_26 Int)) (let ((.cse1 (* 4294967296 aux_div_main_~i~0_26))) (or (let ((.cse0 (<= (mod (+ c_main_~i~0 1) 4294967296) 2147483647))) (and (or .cse0 (forall ((v_ArrVal_48 Int) (v_ArrVal_50 Int)) (= (select (store (store (select |c_#memory_int| c_main_~a~0.base) (+ c_main_~a~0.offset (* (mod (+ c_main_~i~0 1) 4294967296) 8) (- 34359738368)) v_ArrVal_48) (+ c_main_~a~0.offset (* 8 (mod aux_mod_main_~i~0_26 4294967296)) (- 34359738368)) v_ArrVal_50) c_main_~a~0.offset) 0))) (or (forall ((v_ArrVal_48 Int) (v_ArrVal_50 Int)) (= 0 (select (store (store (select |c_#memory_int| c_main_~a~0.base) (+ c_main_~a~0.offset (* (mod (+ c_main_~i~0 1) 4294967296) 8)) v_ArrVal_48) (+ c_main_~a~0.offset (* 8 (mod aux_mod_main_~i~0_26 4294967296)) (- 34359738368)) v_ArrVal_50) c_main_~a~0.offset))) (not .cse0)))) (< (+ .cse1 1 aux_mod_main_~i~0_26) c_~SIZE~0) (<= aux_mod_main_~i~0_26 2147483647) (<= c_~SIZE~0 (+ .cse1 aux_mod_main_~i~0_26)) (<= 4294967296 aux_mod_main_~i~0_26)))) (forall ((aux_div_main_~i~0_26 Int) (aux_mod_main_~i~0_26 Int)) (let ((.cse3 (* 4294967296 aux_div_main_~i~0_26))) (or (let ((.cse2 (<= (mod (+ c_main_~i~0 1) 4294967296) 2147483647))) (and (or (not .cse2) (forall ((v_ArrVal_48 Int) (v_ArrVal_50 Int)) (= (select (store (store (select |c_#memory_int| c_main_~a~0.base) (+ c_main_~a~0.offset (* (mod (+ c_main_~i~0 1) 4294967296) 8)) v_ArrVal_48) (+ c_main_~a~0.offset (* 8 (mod aux_mod_main_~i~0_26 4294967296))) v_ArrVal_50) c_main_~a~0.offset) 0))) (or .cse2 (forall ((v_ArrVal_48 Int) (v_ArrVal_50 Int)) (= (select (store (store (select |c_#memory_int| c_main_~a~0.base) (+ c_main_~a~0.offset (* (mod (+ c_main_~i~0 1) 4294967296) 8) (- 34359738368)) v_ArrVal_48) (+ c_main_~a~0.offset (* 8 (mod aux_mod_main_~i~0_26 4294967296))) v_ArrVal_50) c_main_~a~0.offset) 0))))) (< aux_mod_main_~i~0_26 0) (< (+ .cse3 1 aux_mod_main_~i~0_26) c_~SIZE~0) (<= c_~SIZE~0 (+ .cse3 aux_mod_main_~i~0_26)) (< 2147483647 aux_mod_main_~i~0_26))))) is different from false [2022-01-31 09:03:13,818 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 49 treesize of output 45 [2022-01-31 09:03:13,827 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 09:03:13,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 52 [2022-01-31 09:03:13,845 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 14 treesize of output 6 [2022-01-31 09:03:13,863 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 6 [2022-01-31 09:03:13,901 INFO L353 Elim1Store]: treesize reduction 39, result has 23.5 percent of original size [2022-01-31 09:03:13,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 584 treesize of output 569 [2022-01-31 09:03:14,508 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2022-01-31 09:03:14,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:03:14,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35081830] [2022-01-31 09:03:14,511 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:03:14,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966257846] [2022-01-31 09:03:14,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966257846] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:03:14,511 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:03:14,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 24 [2022-01-31 09:03:14,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823030705] [2022-01-31 09:03:14,512 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:03:14,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 09:03:14,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:03:14,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 09:03:14,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=340, Unknown=3, NotChecked=120, Total=552 [2022-01-31 09:03:14,513 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 24 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 09:03:20,029 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (- 1) c_main_~i~0))) (and (< 1 c_~SIZE~0) (= 0 .cse0) (= c_~MAX~0 100000) (<= c_~SIZE~0 2147483647) (< c_~SIZE~0 100000) (forall ((aux_div_main_~i~0_26 Int) (aux_mod_main_~i~0_26 Int)) (let ((.cse1 (* 4294967296 aux_div_main_~i~0_26))) (or (< aux_mod_main_~i~0_26 0) (< (+ .cse1 1 aux_mod_main_~i~0_26) c_~SIZE~0) (<= c_~SIZE~0 (+ .cse1 aux_mod_main_~i~0_26)) (< 2147483647 aux_mod_main_~i~0_26) (let ((.cse2 (<= (mod c_main_~i~0 4294967296) 2147483647))) (and (or (not .cse2) (forall ((v_ArrVal_48 Int) (v_ArrVal_50 Int)) (= (select (store (store (select |c_#memory_int| c_main_~a~0.base) (+ c_main_~a~0.offset (* (mod c_main_~i~0 4294967296) 8)) v_ArrVal_48) (+ c_main_~a~0.offset (* 8 (mod aux_mod_main_~i~0_26 4294967296))) v_ArrVal_50) c_main_~a~0.offset) 0))) (or .cse2 (forall ((v_ArrVal_48 Int) (v_ArrVal_50 Int)) (= (select (store (store (select |c_#memory_int| c_main_~a~0.base) (+ c_main_~a~0.offset (* (mod c_main_~i~0 4294967296) 8) (- 34359738368)) v_ArrVal_48) (+ c_main_~a~0.offset (* 8 (mod aux_mod_main_~i~0_26 4294967296))) v_ArrVal_50) c_main_~a~0.offset) 0)))))))) (= (* .cse0 .cse0) (select (select |c_#memory_int| c_main_~a~0.base) (+ c_main_~a~0.offset (* (mod (+ c_main_~i~0 4294967295) 4294967296) 8)))) (forall ((aux_div_main_~i~0_26 Int) (aux_mod_main_~i~0_26 Int)) (let ((.cse4 (* 4294967296 aux_div_main_~i~0_26))) (or (let ((.cse3 (<= (mod c_main_~i~0 4294967296) 2147483647))) (and (or .cse3 (forall ((v_ArrVal_48 Int) (v_ArrVal_50 Int)) (= (select (store (store (select |c_#memory_int| c_main_~a~0.base) (+ c_main_~a~0.offset (* (mod c_main_~i~0 4294967296) 8) (- 34359738368)) v_ArrVal_48) (+ c_main_~a~0.offset (* 8 (mod aux_mod_main_~i~0_26 4294967296)) (- 34359738368)) v_ArrVal_50) c_main_~a~0.offset) 0))) (or (not .cse3) (forall ((v_ArrVal_48 Int) (v_ArrVal_50 Int)) (= (select (store (store (select |c_#memory_int| c_main_~a~0.base) (+ c_main_~a~0.offset (* (mod c_main_~i~0 4294967296) 8)) v_ArrVal_48) (+ c_main_~a~0.offset (* 8 (mod aux_mod_main_~i~0_26 4294967296)) (- 34359738368)) v_ArrVal_50) c_main_~a~0.offset) 0))))) (< (+ .cse4 1 aux_mod_main_~i~0_26) c_~SIZE~0) (<= aux_mod_main_~i~0_26 2147483647) (<= c_~SIZE~0 (+ .cse4 aux_mod_main_~i~0_26)) (<= 4294967296 aux_mod_main_~i~0_26)))))) is different from false [2022-01-31 09:03:20,830 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (= (select (select |c_#memory_int| c_main_~a~0.base) c_main_~a~0.offset) 0))) (and (< 1 c_~SIZE~0) (or (= (* (mod c_main_~i~0 4294967296) 8) 0) .cse0) (< c_~SIZE~0 100000) (forall ((aux_div_main_~i~0_26 Int) (aux_mod_main_~i~0_26 Int) (v_ArrVal_50 Int)) (let ((.cse1 (* 4294967296 aux_div_main_~i~0_26))) (or (< aux_mod_main_~i~0_26 0) (< (+ .cse1 1 aux_mod_main_~i~0_26) c_~SIZE~0) (= (select (store (select |c_#memory_int| c_main_~a~0.base) (+ c_main_~a~0.offset (* 8 (mod aux_mod_main_~i~0_26 4294967296))) v_ArrVal_50) c_main_~a~0.offset) 0) (<= c_~SIZE~0 (+ .cse1 aux_mod_main_~i~0_26)) (< 2147483647 aux_mod_main_~i~0_26)))) (< c_main_~i~0 c_~SIZE~0) (forall ((aux_div_main_~i~0_26 Int) (aux_mod_main_~i~0_26 Int) (v_ArrVal_50 Int)) (let ((.cse2 (* 4294967296 aux_div_main_~i~0_26))) (or (< (+ .cse2 1 aux_mod_main_~i~0_26) c_~SIZE~0) (<= aux_mod_main_~i~0_26 2147483647) (<= c_~SIZE~0 (+ .cse2 aux_mod_main_~i~0_26)) (= (select (store (select |c_#memory_int| c_main_~a~0.base) (+ c_main_~a~0.offset (* 8 (mod aux_mod_main_~i~0_26 4294967296)) (- 34359738368)) v_ArrVal_50) c_main_~a~0.offset) 0) (<= 4294967296 aux_mod_main_~i~0_26)))) .cse0)) is different from false [2022-01-31 09:03:21,587 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (= (select (select |c_#memory_int| c_main_~a~0.base) c_main_~a~0.offset) 0))) (and (< 1 c_~SIZE~0) (< c_~SIZE~0 100000) (forall ((aux_div_main_~i~0_26 Int) (aux_mod_main_~i~0_26 Int) (v_ArrVal_50 Int)) (let ((.cse0 (* 4294967296 aux_div_main_~i~0_26))) (or (< aux_mod_main_~i~0_26 0) (< (+ .cse0 1 aux_mod_main_~i~0_26) c_~SIZE~0) (= (select (store (select |c_#memory_int| c_main_~a~0.base) (+ c_main_~a~0.offset (* 8 (mod aux_mod_main_~i~0_26 4294967296))) v_ArrVal_50) c_main_~a~0.offset) 0) (<= c_~SIZE~0 (+ .cse0 aux_mod_main_~i~0_26)) (< 2147483647 aux_mod_main_~i~0_26)))) (forall ((aux_div_main_~i~0_26 Int) (aux_mod_main_~i~0_26 Int) (v_ArrVal_50 Int)) (let ((.cse1 (* 4294967296 aux_div_main_~i~0_26))) (or (< (+ .cse1 1 aux_mod_main_~i~0_26) c_~SIZE~0) (<= aux_mod_main_~i~0_26 2147483647) (<= c_~SIZE~0 (+ .cse1 aux_mod_main_~i~0_26)) (= (select (store (select |c_#memory_int| c_main_~a~0.base) (+ c_main_~a~0.offset (* 8 (mod aux_mod_main_~i~0_26 4294967296)) (- 34359738368)) v_ArrVal_50) c_main_~a~0.offset) 0) (<= 4294967296 aux_mod_main_~i~0_26)))) (< c_main_~i~0 (+ c_~SIZE~0 1)) .cse2 (or (= 0 (* (mod (+ c_main_~i~0 4294967295) 4294967296) 8)) .cse2))) is different from false [2022-01-31 09:03:21,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:03:21,986 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2022-01-31 09:03:21,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 09:03:21,986 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2022-01-31 09:03:21,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:03:21,987 INFO L225 Difference]: With dead ends: 63 [2022-01-31 09:03:21,987 INFO L226 Difference]: Without dead ends: 63 [2022-01-31 09:03:21,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=213, Invalid=797, Unknown=6, NotChecked=390, Total=1406 [2022-01-31 09:03:21,989 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 69 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:03:21,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 163 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 274 Invalid, 0 Unknown, 147 Unchecked, 0.2s Time] [2022-01-31 09:03:21,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-01-31 09:03:21,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 34. [2022-01-31 09:03:21,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 09:03:21,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2022-01-31 09:03:21,994 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 20 [2022-01-31 09:03:21,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:03:21,994 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2022-01-31 09:03:21,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 09:03:21,994 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2022-01-31 09:03:21,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 09:03:21,995 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:03:21,995 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:03:22,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 09:03:22,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:03:22,197 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:03:22,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:03:22,198 INFO L85 PathProgramCache]: Analyzing trace with hash 775637980, now seen corresponding path program 4 times [2022-01-31 09:03:22,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:03:22,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940946280] [2022-01-31 09:03:22,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:03:22,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:03:22,208 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:03:22,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [498490808] [2022-01-31 09:03:22,208 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 09:03:22,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:03:22,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:03:22,211 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:03:22,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 09:03:22,329 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 09:03:22,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:03:22,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-31 09:03:22,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:03:22,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 49 [2022-01-31 09:03:22,384 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-01-31 09:03:22,389 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 09:03:22,452 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 64 [2022-01-31 09:03:22,471 INFO L353 Elim1Store]: treesize reduction 102, result has 20.9 percent of original size [2022-01-31 09:03:22,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 83 [2022-01-31 09:03:22,478 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 09:03:22,495 INFO L353 Elim1Store]: treesize reduction 22, result has 4.3 percent of original size [2022-01-31 09:03:22,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 38 [2022-01-31 09:03:22,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 50 [2022-01-31 09:03:22,541 INFO L353 Elim1Store]: treesize reduction 54, result has 16.9 percent of original size [2022-01-31 09:03:22,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 61 [2022-01-31 09:03:22,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:03:22,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 17 [2022-01-31 09:03:22,595 INFO L353 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-01-31 09:03:22,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2022-01-31 09:03:22,636 INFO L353 Elim1Store]: treesize reduction 48, result has 5.9 percent of original size [2022-01-31 09:03:22,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 27 [2022-01-31 09:03:22,681 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:03:22,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:03:23,349 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 49 treesize of output 45 [2022-01-31 09:03:23,355 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 09:03:23,363 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 09:03:23,363 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 2 case distinctions, treesize of input 45 treesize of output 52 [2022-01-31 09:03:23,386 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 6 [2022-01-31 09:03:23,462 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 14 treesize of output 6 [2022-01-31 09:03:23,522 INFO L353 Elim1Store]: treesize reduction 39, result has 23.5 percent of original size [2022-01-31 09:03:23,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 485 treesize of output 476 [2022-01-31 09:03:23,926 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:03:23,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:03:23,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940946280] [2022-01-31 09:03:23,926 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:03:23,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498490808] [2022-01-31 09:03:23,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498490808] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:03:23,927 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:03:23,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2022-01-31 09:03:23,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657387890] [2022-01-31 09:03:23,927 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:03:23,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 09:03:23,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:03:23,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 09:03:23,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-01-31 09:03:23,928 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 09:03:24,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:03:24,478 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2022-01-31 09:03:24,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 09:03:24,479 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2022-01-31 09:03:24,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:03:24,480 INFO L225 Difference]: With dead ends: 64 [2022-01-31 09:03:24,480 INFO L226 Difference]: Without dead ends: 64 [2022-01-31 09:03:24,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=290, Invalid=1270, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 09:03:24,481 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 60 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:03:24,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 173 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 114 Invalid, 0 Unknown, 70 Unchecked, 0.1s Time] [2022-01-31 09:03:24,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-01-31 09:03:24,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 40. [2022-01-31 09:03:24,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 09:03:24,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2022-01-31 09:03:24,486 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 22 [2022-01-31 09:03:24,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:03:24,486 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2022-01-31 09:03:24,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 09:03:24,487 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2022-01-31 09:03:24,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 09:03:24,487 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:03:24,487 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:03:24,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 09:03:24,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:03:24,688 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:03:24,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:03:24,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1857407175, now seen corresponding path program 1 times [2022-01-31 09:03:24,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:03:24,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981151350] [2022-01-31 09:03:24,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:03:24,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:03:24,699 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:03:24,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1096108021] [2022-01-31 09:03:24,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:03:24,699 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:03:24,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:03:24,708 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:03:24,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 09:03:24,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 09:03:24,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-31 09:03:24,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:03:24,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-31 09:03:24,891 INFO L353 Elim1Store]: treesize reduction 52, result has 5.5 percent of original size [2022-01-31 09:03:24,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 27 [2022-01-31 09:03:24,921 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:03:24,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:03:25,091 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 49 treesize of output 45 [2022-01-31 09:03:25,099 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 09:03:25,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 52 [2022-01-31 09:03:25,113 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 6 [2022-01-31 09:03:25,128 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 14 treesize of output 6 [2022-01-31 09:03:25,158 INFO L353 Elim1Store]: treesize reduction 43, result has 21.8 percent of original size [2022-01-31 09:03:25,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 42 [2022-01-31 09:03:25,207 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:03:25,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:03:25,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981151350] [2022-01-31 09:03:25,207 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:03:25,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096108021] [2022-01-31 09:03:25,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096108021] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:03:25,208 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:03:25,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 14 [2022-01-31 09:03:25,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953255518] [2022-01-31 09:03:25,208 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:03:25,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 09:03:25,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:03:25,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 09:03:25,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-01-31 09:03:25,209 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 13 states have internal predecessors, (28), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 09:03:25,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:03:25,357 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2022-01-31 09:03:25,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 09:03:25,358 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 13 states have internal predecessors, (28), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2022-01-31 09:03:25,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:03:25,360 INFO L225 Difference]: With dead ends: 69 [2022-01-31 09:03:25,361 INFO L226 Difference]: Without dead ends: 69 [2022-01-31 09:03:25,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-01-31 09:03:25,361 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 25 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 09:03:25,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 178 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 133 Invalid, 0 Unknown, 20 Unchecked, 0.1s Time] [2022-01-31 09:03:25,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-01-31 09:03:25,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 49. [2022-01-31 09:03:25,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 40 states have internal predecessors, (46), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:03:25,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2022-01-31 09:03:25,367 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 26 [2022-01-31 09:03:25,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:03:25,367 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2022-01-31 09:03:25,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 13 states have internal predecessors, (28), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 09:03:25,368 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2022-01-31 09:03:25,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 09:03:25,368 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:03:25,368 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:03:25,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 09:03:25,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:03:25,569 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:03:25,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:03:25,570 INFO L85 PathProgramCache]: Analyzing trace with hash 307768406, now seen corresponding path program 2 times [2022-01-31 09:03:25,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:03:25,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247159635] [2022-01-31 09:03:25,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:03:25,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:03:25,581 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:03:25,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [635470438] [2022-01-31 09:03:25,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 09:03:25,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:03:25,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:03:25,587 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:03:25,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 09:03:25,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 09:03:25,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:03:25,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-31 09:03:25,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:03:25,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 49 [2022-01-31 09:03:25,719 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 09:03:25,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-01-31 09:03:25,757 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-31 09:03:25,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-01-31 09:03:25,838 INFO L353 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2022-01-31 09:03:25,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 26 [2022-01-31 09:03:25,879 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:03:25,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:03:26,167 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 49 treesize of output 45 [2022-01-31 09:03:26,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 09:03:26,177 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 09:03:26,177 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 2 case distinctions, treesize of input 45 treesize of output 52 [2022-01-31 09:03:26,190 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 14 treesize of output 6 [2022-01-31 09:03:26,225 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 6 [2022-01-31 09:03:26,277 INFO L353 Elim1Store]: treesize reduction 43, result has 21.8 percent of original size [2022-01-31 09:03:26,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 83 treesize of output 74 [2022-01-31 09:03:26,343 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:03:26,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 09:03:26,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247159635] [2022-01-31 09:03:26,344 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 09:03:26,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635470438] [2022-01-31 09:03:26,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635470438] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 09:03:26,344 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 09:03:26,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2022-01-31 09:03:26,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844289633] [2022-01-31 09:03:26,344 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 09:03:26,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 09:03:26,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 09:03:26,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 09:03:26,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-01-31 09:03:26,345 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 17 states, 15 states have (on average 2.2) internal successors, (33), 16 states have internal predecessors, (33), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 09:03:26,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 09:03:26,577 INFO L93 Difference]: Finished difference Result 84 states and 93 transitions. [2022-01-31 09:03:26,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 09:03:26,578 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.2) internal successors, (33), 16 states have internal predecessors, (33), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2022-01-31 09:03:26,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 09:03:26,579 INFO L225 Difference]: With dead ends: 84 [2022-01-31 09:03:26,579 INFO L226 Difference]: Without dead ends: 84 [2022-01-31 09:03:26,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-01-31 09:03:26,580 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 25 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 09:03:26,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 227 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 224 Invalid, 0 Unknown, 39 Unchecked, 0.2s Time] [2022-01-31 09:03:26,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-01-31 09:03:26,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 49. [2022-01-31 09:03:26,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 40 states have internal predecessors, (46), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 09:03:26,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2022-01-31 09:03:26,586 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 28 [2022-01-31 09:03:26,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 09:03:26,586 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2022-01-31 09:03:26,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.2) internal successors, (33), 16 states have internal predecessors, (33), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 09:03:26,586 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2022-01-31 09:03:26,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 09:03:26,587 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 09:03:26,587 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 09:03:26,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-31 09:03:26,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:03:26,807 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 09:03:26,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 09:03:26,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1669522675, now seen corresponding path program 5 times [2022-01-31 09:03:26,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 09:03:26,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800287200] [2022-01-31 09:03:26,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 09:03:26,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 09:03:26,817 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 09:03:26,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1848425861] [2022-01-31 09:03:26,817 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 09:03:26,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 09:03:26,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 09:03:26,823 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 09:03:26,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 09:03:28,117 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-01-31 09:03:28,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 09:03:28,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-31 09:03:28,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 09:03:28,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 49 [2022-01-31 09:03:28,154 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 09:03:28,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-01-31 09:03:28,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 64 [2022-01-31 09:03:28,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:03:28,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:03:28,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:03:28,210 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 83 [2022-01-31 09:03:28,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:03:28,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 23 [2022-01-31 09:03:28,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 50 [2022-01-31 09:03:28,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:03:28,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:03:28,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:03:28,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 61 [2022-01-31 09:03:28,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:03:28,284 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 24 [2022-01-31 09:03:28,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 50 [2022-01-31 09:03:28,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:03:28,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:03:28,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:03:28,317 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 61 [2022-01-31 09:03:28,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:03:28,326 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 17 [2022-01-31 09:03:28,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 50 [2022-01-31 09:03:28,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:03:28,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:03:28,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:03:28,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 61 [2022-01-31 09:03:28,371 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 09:03:28,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:03:28,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 17 [2022-01-31 09:03:28,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 50 [2022-01-31 09:03:28,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:03:28,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:03:28,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:03:28,418 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 61 [2022-01-31 09:03:28,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:03:28,428 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 17 [2022-01-31 09:03:28,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:03:28,474 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 [2022-01-31 09:03:28,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 09:03:28,518 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 09:03:28,518 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 1 case distinctions, treesize of input 52 treesize of output 26 [2022-01-31 09:03:28,564 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 09:03:28,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 09:03:30,669 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 49 treesize of output 45 [2022-01-31 09:03:30,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 09:03:30,717 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 09:03:30,717 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 2 case distinctions, treesize of input 45 treesize of output 52 [2022-01-31 09:03:30,821 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 14 treesize of output 6 [2022-01-31 09:03:30,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 6 [2022-01-31 09:03:31,245 INFO L353 Elim1Store]: treesize reduction 39, result has 23.5 percent of original size [2022-01-31 09:03:31,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 951313 treesize of output 950284 [2022-01-31 09:03:44,391 WARN L228 SmtUtils]: Spent 7.99s on a formula simplification. DAG size of input: 1870 DAG size of output: 1870 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-01-31 09:03:52,907 WARN L228 SmtUtils]: Spent 5.04s on a formula simplification. DAG size of input: 1861 DAG size of output: 1861 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)