/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/loops/sum_array-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 03:19:57,299 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 03:19:57,300 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 03:19:57,331 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 03:19:57,333 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 03:19:57,334 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 03:19:57,338 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 03:19:57,340 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 03:19:57,344 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 03:19:57,348 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 03:19:57,349 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 03:19:57,350 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 03:19:57,350 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 03:19:57,352 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 03:19:57,353 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 03:19:57,354 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 03:19:57,354 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 03:19:57,355 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 03:19:57,358 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 03:19:57,362 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 03:19:57,364 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 03:19:57,365 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 03:19:57,366 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 03:19:57,367 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 03:19:57,368 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 03:19:57,373 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 03:19:57,379 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 03:19:57,379 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 03:19:57,381 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 03:19:57,381 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-20 03:19:57,391 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 03:19:57,391 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 03:19:57,393 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 03:19:57,393 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 03:19:57,393 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 03:19:57,393 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 03:19:57,393 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 03:19:57,393 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 03:19:57,394 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 03:19:57,394 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 03:19:57,394 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 03:19:57,394 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 03:19:57,394 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 03:19:57,394 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 03:19:57,395 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 03:19:57,395 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 03:19:57,395 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 03:19:57,395 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 03:19:57,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 03:19:57,395 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 03:19:57,395 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 03:19:57,396 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 03:19:57,396 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 03:19:57,580 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 03:19:57,609 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 03:19:57,611 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 03:19:57,612 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 03:19:57,613 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 03:19:57,614 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum_array-2.i [2022-03-20 03:19:57,666 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/421ecd98e/f8ab8c11af1245f898d64b3e67c22d2d/FLAGf7f95a7a2 [2022-03-20 03:19:57,996 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 03:19:57,997 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum_array-2.i [2022-03-20 03:19:58,004 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/421ecd98e/f8ab8c11af1245f898d64b3e67c22d2d/FLAGf7f95a7a2 [2022-03-20 03:19:58,422 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/421ecd98e/f8ab8c11af1245f898d64b3e67c22d2d [2022-03-20 03:19:58,424 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 03:19:58,425 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 03:19:58,428 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 03:19:58,428 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 03:19:58,431 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 03:19:58,432 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 03:19:58" (1/1) ... [2022-03-20 03:19:58,433 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a46bdb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:19:58, skipping insertion in model container [2022-03-20 03:19:58,433 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 03:19:58" (1/1) ... [2022-03-20 03:19:58,439 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 03:19:58,451 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 03:19:58,625 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/sum_array-2.i[938,951] [2022-03-20 03:19:58,638 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 03:19:58,644 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 03:19:58,656 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/sum_array-2.i[938,951] [2022-03-20 03:19:58,663 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 03:19:58,677 INFO L208 MainTranslator]: Completed translation [2022-03-20 03:19:58,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:19:58 WrapperNode [2022-03-20 03:19:58,678 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 03:19:58,678 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 03:19:58,679 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 03:19:58,679 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 03:19:58,686 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:19:58" (1/1) ... [2022-03-20 03:19:58,687 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:19:58" (1/1) ... [2022-03-20 03:19:58,692 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:19:58" (1/1) ... [2022-03-20 03:19:58,692 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:19:58" (1/1) ... [2022-03-20 03:19:58,698 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:19:58" (1/1) ... [2022-03-20 03:19:58,701 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:19:58" (1/1) ... [2022-03-20 03:19:58,706 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:19:58" (1/1) ... [2022-03-20 03:19:58,708 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 03:19:58,709 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 03:19:58,709 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 03:19:58,709 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 03:19:58,711 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:19:58" (1/1) ... [2022-03-20 03:19:58,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 03:19:58,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:19:58,735 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 03:19:58,746 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 [2022-03-20 03:19:58,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 03:19:58,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 03:19:58,773 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 03:19:58,774 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 03:19:58,774 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 03:19:58,774 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 03:19:58,774 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 03:19:58,774 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 03:19:58,774 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-20 03:19:58,774 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-20 03:19:58,774 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 03:19:58,774 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 03:19:58,774 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 03:19:58,775 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 03:19:58,775 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 03:19:58,777 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-20 03:19:58,777 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 03:19:58,777 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-20 03:19:58,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 03:19:58,778 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 03:19:58,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 03:19:58,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 03:19:58,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 03:19:58,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 03:19:58,876 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 03:19:58,877 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 03:19:59,070 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 03:19:59,075 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 03:19:59,076 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-03-20 03:19:59,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:19:59 BoogieIcfgContainer [2022-03-20 03:19:59,077 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 03:19:59,078 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 03:19:59,078 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 03:19:59,087 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 03:19:59,090 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:19:59" (1/1) ... [2022-03-20 03:19:59,092 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-03-20 03:19:59,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 03:19:59 BasicIcfg [2022-03-20 03:19:59,112 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 03:19:59,114 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 03:19:59,115 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 03:19:59,117 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 03:19:59,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 03:19:58" (1/4) ... [2022-03-20 03:19:59,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@526e7720 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 03:19:59, skipping insertion in model container [2022-03-20 03:19:59,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:19:58" (2/4) ... [2022-03-20 03:19:59,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@526e7720 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 03:19:59, skipping insertion in model container [2022-03-20 03:19:59,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:19:59" (3/4) ... [2022-03-20 03:19:59,120 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@526e7720 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 03:19:59, skipping insertion in model container [2022-03-20 03:19:59,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 03:19:59" (4/4) ... [2022-03-20 03:19:59,121 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_array-2.iJordan [2022-03-20 03:19:59,126 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-20 03:19:59,126 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 03:19:59,172 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 03:19:59,179 INFO L340 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 [2022-03-20 03:19:59,179 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 03:19:59,191 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 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) [2022-03-20 03:19:59,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 03:19:59,205 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:19:59,205 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:19:59,206 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:19:59,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:19:59,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1114027626, now seen corresponding path program 1 times [2022-03-20 03:19:59,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:19:59,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022155917] [2022-03-20 03:19:59,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:19:59,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:19:59,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:19:59,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:19:59,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:19:59,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:19:59,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:19:59,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022155917] [2022-03-20 03:19:59,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022155917] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 03:19:59,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 03:19:59,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 03:19:59,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878973362] [2022-03-20 03:19:59,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:19:59,389 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 03:19:59,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:19:59,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 03:19:59,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 03:19:59,414 INFO L87 Difference]: Start difference. First operand has 32 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 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 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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) [2022-03-20 03:19:59,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:19:59,453 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2022-03-20 03:19:59,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 03:19:59,455 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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 17 [2022-03-20 03:19:59,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:19:59,465 INFO L225 Difference]: With dead ends: 32 [2022-03-20 03:19:59,465 INFO L226 Difference]: Without dead ends: 27 [2022-03-20 03:19:59,467 INFO L912 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 [2022-03-20 03:19:59,472 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 28 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 03:19:59,473 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 39 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 03:19:59,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-20 03:19:59,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-03-20 03:19:59,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 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) [2022-03-20 03:19:59,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-03-20 03:19:59,495 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 17 [2022-03-20 03:19:59,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:19:59,496 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-03-20 03:19:59,496 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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) [2022-03-20 03:19:59,496 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-03-20 03:19:59,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 03:19:59,497 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:19:59,497 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:19:59,497 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 03:19:59,497 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:19:59,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:19:59,498 INFO L85 PathProgramCache]: Analyzing trace with hash -2033978408, now seen corresponding path program 1 times [2022-03-20 03:19:59,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:19:59,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720628435] [2022-03-20 03:19:59,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:19:59,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:19:59,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:19:59,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:19:59,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:19:59,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 03:19:59,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:19:59,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720628435] [2022-03-20 03:19:59,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720628435] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 03:19:59,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 03:19:59,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 03:19:59,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239768616] [2022-03-20 03:19:59,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 03:19:59,647 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 03:19:59,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:19:59,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 03:19:59,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 03:19:59,648 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 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) [2022-03-20 03:19:59,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:19:59,787 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2022-03-20 03:19:59,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 03:19:59,788 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 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 17 [2022-03-20 03:19:59,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:19:59,789 INFO L225 Difference]: With dead ends: 45 [2022-03-20 03:19:59,790 INFO L226 Difference]: Without dead ends: 39 [2022-03-20 03:19:59,793 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-20 03:19:59,794 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 48 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 03:19:59,795 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 30 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 03:19:59,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-20 03:19:59,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2022-03-20 03:19:59,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-20 03:19:59,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-03-20 03:19:59,808 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 17 [2022-03-20 03:19:59,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:19:59,813 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-03-20 03:19:59,813 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 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) [2022-03-20 03:19:59,814 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-03-20 03:19:59,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-20 03:19:59,814 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:19:59,814 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:19:59,815 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 03:19:59,815 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:19:59,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:19:59,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1179844468, now seen corresponding path program 1 times [2022-03-20 03:19:59,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:19:59,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161086227] [2022-03-20 03:19:59,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:19:59,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:19:59,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:20:00,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:20:00,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:20:00,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 03:20:00,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:20:00,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161086227] [2022-03-20 03:20:00,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161086227] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:20:00,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332697200] [2022-03-20 03:20:00,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:20:00,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:20:00,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:20:00,667 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) [2022-03-20 03:20:00,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 03:20:00,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:20:00,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-20 03:20:00,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:20:00,800 INFO L390 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 12 [2022-03-20 03:20:00,898 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-20 03:20:00,899 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 24 [2022-03-20 03:20:01,005 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 03:20:01,005 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 29 [2022-03-20 03:20:01,045 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 03:20:01,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:20:01,250 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 03:20:01,251 INFO L390 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 195 treesize of output 199 [2022-03-20 03:20:03,771 INFO L356 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2022-03-20 03:20:03,771 INFO L390 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 71 treesize of output 51 [2022-03-20 03:20:03,799 INFO L356 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2022-03-20 03:20:03,799 INFO L390 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 41 treesize of output 30 [2022-03-20 03:20:03,994 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 03:20:03,995 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 62 [2022-03-20 03:20:04,025 INFO L356 Elim1Store]: treesize reduction 7, result has 50.0 percent of original size [2022-03-20 03:20:04,026 INFO L390 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 108 treesize of output 87 [2022-03-20 03:20:04,482 INFO L356 Elim1Store]: treesize reduction 10, result has 28.6 percent of original size [2022-03-20 03:20:04,482 INFO L390 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 223 treesize of output 169 [2022-03-20 03:20:04,546 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-03-20 03:20:04,547 INFO L390 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 261 treesize of output 1 [2022-03-20 03:20:04,636 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-03-20 03:20:04,636 INFO L390 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 169 treesize of output 1 [2022-03-20 03:20:04,710 INFO L356 Elim1Store]: treesize reduction 10, result has 28.6 percent of original size [2022-03-20 03:20:04,710 INFO L390 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 158 treesize of output 120 [2022-03-20 03:20:04,813 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-03-20 03:20:04,813 INFO L390 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 104 treesize of output 1 [2022-03-20 03:20:06,176 INFO L356 Elim1Store]: treesize reduction 40, result has 70.8 percent of original size [2022-03-20 03:20:06,190 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 64 treesize of output 132 [2022-03-20 03:20:07,150 INFO L356 Elim1Store]: treesize reduction 40, result has 70.8 percent of original size [2022-03-20 03:20:07,151 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 697 treesize of output 473 [2022-03-20 03:20:08,867 INFO L356 Elim1Store]: treesize reduction 33, result has 74.4 percent of original size [2022-03-20 03:20:08,868 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 129 [2022-03-20 03:20:08,943 INFO L356 Elim1Store]: treesize reduction 108, result has 16.3 percent of original size [2022-03-20 03:20:08,944 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 172 treesize of output 112 [2022-03-20 03:20:09,009 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 03:20:09,010 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 827 treesize of output 585 [2022-03-20 03:20:18,761 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-03-20 03:20:18,761 INFO L390 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 38 treesize of output 1 [2022-03-20 03:20:18,768 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-03-20 03:20:18,769 INFO L390 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 285 treesize of output 1 [2022-03-20 03:20:18,779 INFO L356 Elim1Store]: treesize reduction 128, result has 0.8 percent of original size [2022-03-20 03:20:18,779 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 1 [2022-03-20 03:20:18,790 INFO L356 Elim1Store]: treesize reduction 128, result has 0.8 percent of original size [2022-03-20 03:20:18,791 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 827 treesize of output 1 [2022-03-20 03:20:18,811 WARN L234 Elim1Store]: Array PQE input equivalent to true [2022-03-20 03:20:18,815 WARN L234 Elim1Store]: Array PQE input equivalent to true [2022-03-20 03:20:18,826 INFO L356 Elim1Store]: treesize reduction 84, result has 1.2 percent of original size [2022-03-20 03:20:18,827 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 104 treesize of output 1 [2022-03-20 03:20:18,833 INFO L356 Elim1Store]: treesize reduction 84, result has 1.2 percent of original size [2022-03-20 03:20:18,834 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 169 treesize of output 1 [2022-03-20 03:20:18,839 INFO L356 Elim1Store]: treesize reduction 84, result has 1.2 percent of original size [2022-03-20 03:20:18,840 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 1 [2022-03-20 03:20:18,846 INFO L356 Elim1Store]: treesize reduction 84, result has 1.2 percent of original size [2022-03-20 03:20:18,846 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 261 treesize of output 1 [2022-03-20 03:20:18,851 WARN L234 Elim1Store]: Array PQE input equivalent to true [2022-03-20 03:20:18,866 INFO L356 Elim1Store]: treesize reduction 128, result has 0.8 percent of original size [2022-03-20 03:20:18,867 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 799 treesize of output 1 [2022-03-20 03:20:18,870 WARN L234 Elim1Store]: Array PQE input equivalent to true [2022-03-20 03:20:18,878 INFO L356 Elim1Store]: treesize reduction 128, result has 0.8 percent of original size [2022-03-20 03:20:18,879 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 402 treesize of output 1 [2022-03-20 03:20:18,885 INFO L356 Elim1Store]: treesize reduction 128, result has 0.8 percent of original size [2022-03-20 03:20:18,885 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 1 [2022-03-20 03:20:18,894 INFO L356 Elim1Store]: treesize reduction 128, result has 0.8 percent of original size [2022-03-20 03:20:18,894 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 231 treesize of output 1 [2022-03-20 03:20:18,897 WARN L234 Elim1Store]: Array PQE input equivalent to true [2022-03-20 03:20:18,905 WARN L234 Elim1Store]: Array PQE input equivalent to true [2022-03-20 03:20:18,979 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 03:20:18,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332697200] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:20:18,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:20:18,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 22 [2022-03-20 03:20:18,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779519950] [2022-03-20 03:20:18,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:20:18,980 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 03:20:18,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:20:18,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 03:20:18,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-03-20 03:20:18,982 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 22 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 19 states have internal predecessors, (46), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:20:19,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:20:19,583 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2022-03-20 03:20:19,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 03:20:19,586 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 19 states have internal predecessors, (46), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-03-20 03:20:19,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:20:19,587 INFO L225 Difference]: With dead ends: 61 [2022-03-20 03:20:19,587 INFO L226 Difference]: Without dead ends: 46 [2022-03-20 03:20:19,588 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=256, Invalid=1150, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 03:20:19,588 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 105 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 03:20:19,588 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 84 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 03:20:19,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-20 03:20:19,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2022-03-20 03:20:19,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 32 states have internal predecessors, (35), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 03:20:19,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2022-03-20 03:20:19,593 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 25 [2022-03-20 03:20:19,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:20:19,593 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2022-03-20 03:20:19,593 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 19 states have internal predecessors, (46), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 03:20:19,593 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2022-03-20 03:20:19,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 03:20:19,594 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:20:19,594 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:20:19,611 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-20 03:20:19,803 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:20:19,804 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:20:19,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:20:19,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1140994972, now seen corresponding path program 1 times [2022-03-20 03:20:19,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:20:19,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215423519] [2022-03-20 03:20:19,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:20:19,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:20:19,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:20:19,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:20:19,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:20:19,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-20 03:20:19,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:20:19,944 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 03:20:19,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:20:19,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215423519] [2022-03-20 03:20:19,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215423519] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:20:19,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637364798] [2022-03-20 03:20:19,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:20:19,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:20:19,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:20:19,946 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) [2022-03-20 03:20:19,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 03:20:19,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:20:19,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 03:20:20,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:20:20,088 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 03:20:20,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:20:20,197 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-20 03:20:20,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637364798] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 03:20:20,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 03:20:20,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 13 [2022-03-20 03:20:20,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649745595] [2022-03-20 03:20:20,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 03:20:20,198 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 03:20:20,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 03:20:20,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 03:20:20,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-03-20 03:20:20,199 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 03:20:20,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 03:20:20,457 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2022-03-20 03:20:20,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 03:20:20,457 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2022-03-20 03:20:20,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 03:20:20,458 INFO L225 Difference]: With dead ends: 62 [2022-03-20 03:20:20,458 INFO L226 Difference]: Without dead ends: 62 [2022-03-20 03:20:20,458 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2022-03-20 03:20:20,459 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 146 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 03:20:20,459 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 49 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 03:20:20,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-03-20 03:20:20,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 44. [2022-03-20 03:20:20,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 37 states have internal predecessors, (40), 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) [2022-03-20 03:20:20,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2022-03-20 03:20:20,463 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 36 [2022-03-20 03:20:20,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 03:20:20,463 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2022-03-20 03:20:20,463 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 03:20:20,463 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2022-03-20 03:20:20,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-20 03:20:20,464 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 03:20:20,464 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 03:20:20,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 03:20:20,679 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-20 03:20:20,680 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 03:20:20,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 03:20:20,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1497787256, now seen corresponding path program 2 times [2022-03-20 03:20:20,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 03:20:20,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188306449] [2022-03-20 03:20:20,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 03:20:20,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 03:20:20,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:20:21,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 03:20:21,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:20:21,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-20 03:20:21,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 03:20:21,497 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-20 03:20:21,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 03:20:21,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188306449] [2022-03-20 03:20:21,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188306449] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 03:20:21,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979316035] [2022-03-20 03:20:21,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 03:20:21,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 03:20:21,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 03:20:21,498 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) [2022-03-20 03:20:21,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 03:20:21,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 03:20:21,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 03:20:21,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 03:20:21,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 03:20:21,573 INFO L390 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 12 [2022-03-20 03:20:21,667 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2022-03-20 03:20:21,685 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-03-20 03:20:21,705 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-03-20 03:20:21,706 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 30 [2022-03-20 03:20:30,190 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 03:20:30,190 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 31 [2022-03-20 03:20:30,243 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 03:20:30,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 03:20:38,553 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (<= (mod c_main_~i~0 4294967296) 2147483647))) (and (or .cse0 (forall ((|main_~#C~0.offset| Int) (|main_~#A~0.offset| Int)) (let ((.cse2 (let ((.cse3 (* (mod c_main_~i~0 4294967296) 4))) (store (select |c_#memory_int| |c_main_~#C~0.base|) (+ (- 17179869184) .cse3 |main_~#C~0.offset|) (+ (select (select |c_#memory_int| |c_main_~#A~0.base|) (+ (- 17179869184) .cse3 |main_~#A~0.offset|)) (select (select |c_#memory_int| |c_main_~#B~0.base|) (+ (- 17179869184) .cse3 |c_main_~#B~0.offset|))))))) (= (let ((.cse1 (store |c_#memory_int| |c_main_~#C~0.base| .cse2))) (+ (select (select .cse1 |c_main_~#A~0.base|) (+ |main_~#A~0.offset| 4)) (select (select .cse1 |c_main_~#B~0.base|) (+ |c_main_~#B~0.offset| 4)))) (select .cse2 (+ |main_~#C~0.offset| 4)))))) (or (not .cse0) (forall ((|main_~#C~0.offset| Int) (|main_~#A~0.offset| Int)) (let ((.cse5 (let ((.cse6 (* (mod c_main_~i~0 4294967296) 4))) (store (select |c_#memory_int| |c_main_~#C~0.base|) (+ .cse6 |main_~#C~0.offset|) (+ (select (select |c_#memory_int| |c_main_~#A~0.base|) (+ .cse6 |main_~#A~0.offset|)) (select (select |c_#memory_int| |c_main_~#B~0.base|) (+ .cse6 |c_main_~#B~0.offset|))))))) (= (let ((.cse4 (store |c_#memory_int| |c_main_~#C~0.base| .cse5))) (+ (select (select .cse4 |c_main_~#A~0.base|) (+ |main_~#A~0.offset| 4)) (select (select .cse4 |c_main_~#B~0.base|) (+ |c_main_~#B~0.offset| 4)))) (select .cse5 (+ |main_~#C~0.offset| 4)))))))) is different from false [2022-03-20 03:20:40,573 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse3 (<= (mod (+ c_main_~i~0 1) 4294967296) 2147483647))) (and (or (forall ((|main_~#C~0.offset| Int) (|main_~#A~0.offset| Int)) (let ((.cse1 (let ((.cse2 (* (mod (+ c_main_~i~0 1) 4294967296) 4))) (store (select |c_#memory_int| |c_main_~#C~0.base|) (+ .cse2 |main_~#C~0.offset|) (+ (select (select |c_#memory_int| |c_main_~#A~0.base|) (+ .cse2 |main_~#A~0.offset|)) (select (select |c_#memory_int| |c_main_~#B~0.base|) (+ .cse2 |c_main_~#B~0.offset|))))))) (= (let ((.cse0 (store |c_#memory_int| |c_main_~#C~0.base| .cse1))) (+ (select (select .cse0 |c_main_~#B~0.base|) (+ |c_main_~#B~0.offset| 4)) (select (select .cse0 |c_main_~#A~0.base|) (+ |main_~#A~0.offset| 4)))) (select .cse1 (+ |main_~#C~0.offset| 4))))) (not .cse3)) (or .cse3 (forall ((|main_~#C~0.offset| Int) (|main_~#A~0.offset| Int)) (let ((.cse5 (let ((.cse6 (* (mod (+ c_main_~i~0 1) 4294967296) 4))) (store (select |c_#memory_int| |c_main_~#C~0.base|) (+ (- 17179869184) .cse6 |main_~#C~0.offset|) (+ (select (select |c_#memory_int| |c_main_~#A~0.base|) (+ (- 17179869184) .cse6 |main_~#A~0.offset|)) (select (select |c_#memory_int| |c_main_~#B~0.base|) (+ (- 17179869184) .cse6 |c_main_~#B~0.offset|))))))) (= (let ((.cse4 (store |c_#memory_int| |c_main_~#C~0.base| .cse5))) (+ (select (select .cse4 |c_main_~#B~0.base|) (+ |c_main_~#B~0.offset| 4)) (select (select .cse4 |c_main_~#A~0.base|) (+ |main_~#A~0.offset| 4)))) (select .cse5 (+ |main_~#C~0.offset| 4)))))))) is different from false [2022-03-20 03:20:40,595 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse4 (<= (mod (+ c_main_~i~0 1) 4294967296) 2147483647))) (and (or (forall ((|main_~#C~0.offset| Int) (v_ArrVal_134 (Array Int Int)) (|main_~#A~0.offset| Int)) (let ((.cse1 (let ((.cse2 (* (mod (+ c_main_~i~0 1) 4294967296) 4))) (store v_ArrVal_134 (+ .cse2 |main_~#C~0.offset|) (let ((.cse3 (store |c_#memory_int| |c_main_~#C~0.base| v_ArrVal_134))) (+ (select (select .cse3 |c_main_~#B~0.base|) (+ .cse2 |c_main_~#B~0.offset|)) (select (select .cse3 |c_main_~#A~0.base|) (+ .cse2 |main_~#A~0.offset|)))))))) (= (let ((.cse0 (store |c_#memory_int| |c_main_~#C~0.base| .cse1))) (+ (select (select .cse0 |c_main_~#B~0.base|) (+ |c_main_~#B~0.offset| 4)) (select (select .cse0 |c_main_~#A~0.base|) (+ |main_~#A~0.offset| 4)))) (select .cse1 (+ |main_~#C~0.offset| 4))))) (not .cse4)) (or .cse4 (forall ((|main_~#C~0.offset| Int) (v_ArrVal_134 (Array Int Int)) (|main_~#A~0.offset| Int)) (let ((.cse5 (let ((.cse7 (* (mod (+ c_main_~i~0 1) 4294967296) 4))) (store v_ArrVal_134 (+ (- 17179869184) .cse7 |main_~#C~0.offset|) (let ((.cse8 (store |c_#memory_int| |c_main_~#C~0.base| v_ArrVal_134))) (+ (select (select .cse8 |c_main_~#A~0.base|) (+ (- 17179869184) .cse7 |main_~#A~0.offset|)) (select (select .cse8 |c_main_~#B~0.base|) (+ (- 17179869184) .cse7 |c_main_~#B~0.offset|)))))))) (= (select .cse5 (+ |main_~#C~0.offset| 4)) (let ((.cse6 (store |c_#memory_int| |c_main_~#C~0.base| .cse5))) (+ (select (select .cse6 |c_main_~#A~0.base|) (+ |main_~#A~0.offset| 4)) (select (select .cse6 |c_main_~#B~0.base|) (+ |c_main_~#B~0.offset| 4)))))))))) is different from false [2022-03-20 03:20:40,606 WARN L833 $PredicateComparison]: unable to prove that (forall ((|main_~#C~0.offset| Int) (v_ArrVal_134 (Array Int Int)) (|main_~#A~0.offset| Int)) (let ((.cse3 (+ |main_~#A~0.offset| 4)) (.cse2 (+ |c_main_~#B~0.offset| 4))) (let ((.cse0 (let ((.cse4 (store |c_#memory_int| |c_main_~#C~0.base| v_ArrVal_134))) (+ (select (select .cse4 |c_main_~#A~0.base|) .cse3) (select (select .cse4 |c_main_~#B~0.base|) .cse2))))) (= .cse0 (let ((.cse1 (store |c_#memory_int| |c_main_~#C~0.base| (store v_ArrVal_134 (+ |main_~#C~0.offset| 4) .cse0)))) (+ (select (select .cse1 |c_main_~#B~0.base|) .cse2) (select (select .cse1 |c_main_~#A~0.base|) .cse3))))))) is different from false [2022-03-20 03:20:40,659 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 03:20:40,659 INFO L390 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 6267 treesize of output 6087 [2022-03-20 03:20:40,726 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-20 03:20:40,727 INFO L390 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 10250 treesize of output 8054