/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/eureka_05.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 12:04:23,479 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 12:04:23,480 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 12:04:23,501 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 12:04:23,501 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 12:04:23,504 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 12:04:23,531 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 12:04:23,533 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 12:04:23,534 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 12:04:23,534 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 12:04:23,535 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 12:04:23,535 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 12:04:23,536 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 12:04:23,536 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 12:04:23,537 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 12:04:23,537 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 12:04:23,538 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 12:04:23,538 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 12:04:23,539 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 12:04:23,540 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 12:04:23,541 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 12:04:23,542 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 12:04:23,542 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 12:04:23,543 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 12:04:23,544 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 12:04:23,549 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 12:04:23,549 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 12:04:23,549 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 12:04:23,552 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 12:04:23,562 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 12:04:23,562 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 12:04:23,563 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 12:04:23,563 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 12:04:23,564 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 12:04:23,564 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 12:04:23,564 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 12:04:23,564 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 12:04:23,564 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 12:04:23,564 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 12:04:23,564 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 12:04:23,564 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 12:04:23,564 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 12:04:23,564 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 12:04:23,565 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 12:04:23,565 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 12:04:23,565 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 12:04:23,565 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 12:04:23,565 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 12:04:23,565 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 12:04:23,565 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 12:04:23,566 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 12:04:23,566 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 12:04:23,774 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 12:04:23,790 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 12:04:23,792 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 12:04:23,793 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 12:04:23,794 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 12:04:23,795 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/eureka_05.i [2022-01-31 12:04:23,842 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09fd68c2d/db7a9bf9f4904367a6d48def7057c3ec/FLAG3cdae5099 [2022-01-31 12:04:24,242 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 12:04:24,243 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/eureka_05.i [2022-01-31 12:04:24,250 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09fd68c2d/db7a9bf9f4904367a6d48def7057c3ec/FLAG3cdae5099 [2022-01-31 12:04:24,263 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09fd68c2d/db7a9bf9f4904367a6d48def7057c3ec [2022-01-31 12:04:24,264 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 12:04:24,266 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 12:04:24,270 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 12:04:24,270 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 12:04:24,273 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 12:04:24,273 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 12:04:24" (1/1) ... [2022-01-31 12:04:24,274 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c2d70e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:04:24, skipping insertion in model container [2022-01-31 12:04:24,275 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 12:04:24" (1/1) ... [2022-01-31 12:04:24,279 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 12:04:24,293 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 12:04:24,424 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/eureka_05.i[810,823] [2022-01-31 12:04:24,439 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 12:04:24,446 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 12:04:24,457 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/eureka_05.i[810,823] [2022-01-31 12:04:24,473 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 12:04:24,484 INFO L208 MainTranslator]: Completed translation [2022-01-31 12:04:24,484 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:04:24 WrapperNode [2022-01-31 12:04:24,484 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 12:04:24,485 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 12:04:24,485 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 12:04:24,485 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 12:04:24,493 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:04:24" (1/1) ... [2022-01-31 12:04:24,493 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:04:24" (1/1) ... [2022-01-31 12:04:24,504 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:04:24" (1/1) ... [2022-01-31 12:04:24,505 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:04:24" (1/1) ... [2022-01-31 12:04:24,517 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:04:24" (1/1) ... [2022-01-31 12:04:24,522 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:04:24" (1/1) ... [2022-01-31 12:04:24,525 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:04:24" (1/1) ... [2022-01-31 12:04:24,526 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 12:04:24,527 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 12:04:24,527 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 12:04:24,527 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 12:04:24,529 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:04:24" (1/1) ... [2022-01-31 12:04:24,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 12:04:24,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:04:24,551 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 12:04:24,564 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 12:04:24,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 12:04:24,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 12:04:24,579 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 12:04:24,580 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 12:04:24,580 INFO L138 BoogieDeclarations]: Found implementation of procedure SelectionSort [2022-01-31 12:04:24,580 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 12:04:24,580 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 12:04:24,580 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 12:04:24,581 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 12:04:24,581 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 12:04:24,581 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 12:04:24,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 12:04:24,581 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 12:04:24,581 INFO L130 BoogieDeclarations]: Found specification of procedure SelectionSort [2022-01-31 12:04:24,582 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 12:04:24,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 12:04:24,584 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 12:04:24,584 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 12:04:24,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 12:04:24,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 12:04:24,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 12:04:24,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 12:04:24,634 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 12:04:24,635 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 12:04:24,775 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 12:04:24,779 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 12:04:24,779 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-01-31 12:04:24,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 12:04:24 BoogieIcfgContainer [2022-01-31 12:04:24,780 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 12:04:24,781 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 12:04:24,781 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 12:04:24,782 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 12:04:24,784 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 12:04:24" (1/1) ... [2022-01-31 12:04:24,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 12:04:24 BasicIcfg [2022-01-31 12:04:24,812 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 12:04:24,813 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 12:04:24,813 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 12:04:24,815 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 12:04:24,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 12:04:24" (1/4) ... [2022-01-31 12:04:24,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5050c39c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 12:04:24, skipping insertion in model container [2022-01-31 12:04:24,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:04:24" (2/4) ... [2022-01-31 12:04:24,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5050c39c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 12:04:24, skipping insertion in model container [2022-01-31 12:04:24,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 12:04:24" (3/4) ... [2022-01-31 12:04:24,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5050c39c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 12:04:24, skipping insertion in model container [2022-01-31 12:04:24,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 12:04:24" (4/4) ... [2022-01-31 12:04:24,817 INFO L111 eAbstractionObserver]: Analyzing ICFG eureka_05.iJordan [2022-01-31 12:04:24,821 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 12:04:24,821 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 12:04:24,881 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 12:04:24,885 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 12:04:24,885 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 12:04:24,903 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 25 states have internal predecessors, (35), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 12:04:24,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-31 12:04:24,908 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:04:24,908 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:04:24,908 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:04:24,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:04:24,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1326105583, now seen corresponding path program 1 times [2022-01-31 12:04:24,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:04:24,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186339600] [2022-01-31 12:04:24,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:04:24,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:04:25,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:04:25,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:04:25,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:04:25,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 12:04:25,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:04:25,120 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 12:04:25,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:04:25,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186339600] [2022-01-31 12:04:25,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186339600] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 12:04:25,122 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 12:04:25,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 12:04:25,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334661620] [2022-01-31 12:04:25,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 12:04:25,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 12:04:25,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:04:25,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 12:04:25,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 12:04:25,149 INFO L87 Difference]: Start difference. First operand has 34 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 25 states have internal predecessors, (35), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 12:04:25,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:04:25,265 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2022-01-31 12:04:25,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 12:04:25,267 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-01-31 12:04:25,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:04:25,271 INFO L225 Difference]: With dead ends: 51 [2022-01-31 12:04:25,272 INFO L226 Difference]: Without dead ends: 43 [2022-01-31 12:04:25,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 12:04:25,275 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 67 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 12:04:25,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 30 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 12:04:25,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-31 12:04:25,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 29. [2022-01-31 12:04:25,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 12:04:25,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-01-31 12:04:25,298 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 18 [2022-01-31 12:04:25,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:04:25,298 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-01-31 12:04:25,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 12:04:25,299 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-01-31 12:04:25,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-31 12:04:25,299 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:04:25,299 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:04:25,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 12:04:25,300 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:04:25,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:04:25,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1290489969, now seen corresponding path program 1 times [2022-01-31 12:04:25,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:04:25,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978835595] [2022-01-31 12:04:25,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:04:25,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:04:25,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:04:25,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:04:25,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:04:25,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 12:04:25,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:04:25,349 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 12:04:25,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:04:25,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978835595] [2022-01-31 12:04:25,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978835595] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 12:04:25,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 12:04:25,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 12:04:25,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831356395] [2022-01-31 12:04:25,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 12:04:25,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 12:04:25,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:04:25,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 12:04:25,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 12:04:25,351 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 12:04:25,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:04:25,444 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2022-01-31 12:04:25,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 12:04:25,445 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-01-31 12:04:25,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:04:25,446 INFO L225 Difference]: With dead ends: 38 [2022-01-31 12:04:25,446 INFO L226 Difference]: Without dead ends: 38 [2022-01-31 12:04:25,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-31 12:04:25,447 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 48 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 12:04:25,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 25 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 12:04:25,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-31 12:04:25,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2022-01-31 12:04:25,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 12:04:25,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-01-31 12:04:25,451 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 18 [2022-01-31 12:04:25,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:04:25,451 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-01-31 12:04:25,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 12:04:25,451 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-01-31 12:04:25,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 12:04:25,452 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:04:25,452 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:04:25,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 12:04:25,452 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:04:25,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:04:25,453 INFO L85 PathProgramCache]: Analyzing trace with hash 43929779, now seen corresponding path program 1 times [2022-01-31 12:04:25,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:04:25,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768343232] [2022-01-31 12:04:25,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:04:25,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:04:25,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:04:25,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:04:25,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:04:25,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-01-31 12:04:25,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:04:25,499 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 12:04:25,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:04:25,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768343232] [2022-01-31 12:04:25,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768343232] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:04:25,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284660652] [2022-01-31 12:04:25,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:04:25,500 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:04:25,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:04:25,501 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 12:04:25,518 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 12:04:25,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:04:25,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 12:04:25,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:04:25,640 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 12:04:25,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 12:04:25,688 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 12:04:25,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284660652] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 12:04:25,689 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 12:04:25,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 8 [2022-01-31 12:04:25,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055731686] [2022-01-31 12:04:25,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 12:04:25,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 12:04:25,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:04:25,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 12:04:25,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-01-31 12:04:25,691 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 12:04:25,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:04:25,845 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2022-01-31 12:04:25,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 12:04:25,845 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 20 [2022-01-31 12:04:25,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:04:25,846 INFO L225 Difference]: With dead ends: 47 [2022-01-31 12:04:25,846 INFO L226 Difference]: Without dead ends: 47 [2022-01-31 12:04:25,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-01-31 12:04:25,847 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 57 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 12:04:25,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 25 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 12:04:25,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-01-31 12:04:25,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2022-01-31 12:04:25,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 12:04:25,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-01-31 12:04:25,851 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 20 [2022-01-31 12:04:25,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:04:25,852 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-01-31 12:04:25,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 12:04:25,852 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-01-31 12:04:25,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 12:04:25,852 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:04:25,853 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:04:25,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 12:04:26,070 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 12:04:26,070 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:04:26,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:04:26,071 INFO L85 PathProgramCache]: Analyzing trace with hash -969564551, now seen corresponding path program 2 times [2022-01-31 12:04:26,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:04:26,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108114316] [2022-01-31 12:04:26,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:04:26,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:04:26,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:04:26,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:04:26,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:04:26,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 12:04:26,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:04:26,157 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 12:04:26,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:04:26,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108114316] [2022-01-31 12:04:26,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108114316] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 12:04:26,157 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 12:04:26,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 12:04:26,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179597428] [2022-01-31 12:04:26,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 12:04:26,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 12:04:26,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:04:26,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 12:04:26,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-01-31 12:04:26,159 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 12:04:26,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:04:26,286 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2022-01-31 12:04:26,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 12:04:26,286 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-01-31 12:04:26,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:04:26,287 INFO L225 Difference]: With dead ends: 42 [2022-01-31 12:04:26,287 INFO L226 Difference]: Without dead ends: 42 [2022-01-31 12:04:26,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-01-31 12:04:26,288 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 76 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 12:04:26,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 27 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 12:04:26,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-31 12:04:26,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2022-01-31 12:04:26,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 12:04:26,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2022-01-31 12:04:26,291 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 26 [2022-01-31 12:04:26,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:04:26,292 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2022-01-31 12:04:26,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 12:04:26,292 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2022-01-31 12:04:26,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 12:04:26,293 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:04:26,293 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:04:26,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 12:04:26,293 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:04:26,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:04:26,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1845213134, now seen corresponding path program 1 times [2022-01-31 12:04:26,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:04:26,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57391875] [2022-01-31 12:04:26,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:04:26,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:04:26,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:04:26,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:04:26,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:04:26,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 12:04:26,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:04:26,381 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-31 12:04:26,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:04:26,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57391875] [2022-01-31 12:04:26,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57391875] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:04:26,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791106426] [2022-01-31 12:04:26,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:04:26,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:04:26,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:04:26,383 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 12:04:26,384 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 12:04:26,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:04:26,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 12:04:26,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:04:26,529 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 12:04:26,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 12:04:26,594 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 12:04:26,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791106426] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 12:04:26,594 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 12:04:26,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-01-31 12:04:26,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079899447] [2022-01-31 12:04:26,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 12:04:26,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 12:04:26,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:04:26,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 12:04:26,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-01-31 12:04:26,596 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 11 states have internal predecessors, (44), 3 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 12:04:26,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:04:26,968 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2022-01-31 12:04:26,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 12:04:26,968 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 11 states have internal predecessors, (44), 3 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 30 [2022-01-31 12:04:26,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:04:26,971 INFO L225 Difference]: With dead ends: 63 [2022-01-31 12:04:26,971 INFO L226 Difference]: Without dead ends: 63 [2022-01-31 12:04:26,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2022-01-31 12:04:26,973 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 106 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 12:04:26,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 38 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 12:04:26,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-01-31 12:04:26,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 40. [2022-01-31 12:04:26,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 12:04:26,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2022-01-31 12:04:26,983 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 30 [2022-01-31 12:04:26,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:04:26,983 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2022-01-31 12:04:26,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 11 states have internal predecessors, (44), 3 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 12:04:26,983 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2022-01-31 12:04:26,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 12:04:26,984 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:04:26,984 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:04:27,002 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-31 12:04:27,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:04:27,200 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:04:27,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:04:27,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1453502491, now seen corresponding path program 1 times [2022-01-31 12:04:27,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:04:27,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15883375] [2022-01-31 12:04:27,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:04:27,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:04:27,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:04:27,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:04:27,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:04:27,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 12:04:27,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:04:27,268 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-31 12:04:27,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:04:27,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15883375] [2022-01-31 12:04:27,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15883375] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:04:27,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611398454] [2022-01-31 12:04:27,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:04:27,268 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:04:27,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:04:27,269 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 12:04:27,270 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 12:04:27,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:04:27,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-31 12:04:27,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:04:27,406 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-31 12:04:27,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 12:04:27,550 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-01-31 12:04:27,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611398454] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 12:04:27,550 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 12:04:27,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 16 [2022-01-31 12:04:27,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405499590] [2022-01-31 12:04:27,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 12:04:27,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 12:04:27,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:04:27,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 12:04:27,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-01-31 12:04:27,552 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 13 states have internal predecessors, (44), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 12:04:27,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:04:27,917 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2022-01-31 12:04:27,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 12:04:27,917 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 13 states have internal predecessors, (44), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 35 [2022-01-31 12:04:27,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:04:27,918 INFO L225 Difference]: With dead ends: 64 [2022-01-31 12:04:27,918 INFO L226 Difference]: Without dead ends: 64 [2022-01-31 12:04:27,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=637, Unknown=0, NotChecked=0, Total=870 [2022-01-31 12:04:27,919 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 199 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 12:04:27,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 32 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 12:04:27,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-01-31 12:04:27,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2022-01-31 12:04:27,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 51 states have internal predecessors, (62), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 12:04:27,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2022-01-31 12:04:27,922 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 35 [2022-01-31 12:04:27,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:04:27,922 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2022-01-31 12:04:27,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 13 states have internal predecessors, (44), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 12:04:27,923 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2022-01-31 12:04:27,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 12:04:27,923 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:04:27,923 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:04:27,944 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 12:04:28,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:04:28,124 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:04:28,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:04:28,125 INFO L85 PathProgramCache]: Analyzing trace with hash -444702843, now seen corresponding path program 2 times [2022-01-31 12:04:28,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:04:28,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255249893] [2022-01-31 12:04:28,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:04:28,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:04:28,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:04:28,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:04:28,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:04:28,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 12:04:28,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:04:28,251 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-01-31 12:04:28,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:04:28,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255249893] [2022-01-31 12:04:28,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255249893] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:04:28,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409946944] [2022-01-31 12:04:28,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 12:04:28,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:04:28,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:04:28,256 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 12:04:28,258 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 12:04:28,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 12:04:28,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 12:04:28,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 12:04:28,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:04:28,468 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-01-31 12:04:28,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 12:04:28,700 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-01-31 12:04:28,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409946944] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 12:04:28,701 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 12:04:28,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 9] total 21 [2022-01-31 12:04:28,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368062751] [2022-01-31 12:04:28,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 12:04:28,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 12:04:28,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:04:28,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 12:04:28,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-01-31 12:04:28,702 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 18 states have internal predecessors, (68), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 12:04:29,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:04:29,086 INFO L93 Difference]: Finished difference Result 69 states and 83 transitions. [2022-01-31 12:04:29,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 12:04:29,087 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 18 states have internal predecessors, (68), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 54 [2022-01-31 12:04:29,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:04:29,088 INFO L225 Difference]: With dead ends: 69 [2022-01-31 12:04:29,088 INFO L226 Difference]: Without dead ends: 69 [2022-01-31 12:04:29,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=1005, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 12:04:29,089 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 177 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 12:04:29,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 29 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 12:04:29,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-01-31 12:04:29,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2022-01-31 12:04:29,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 54 states have (on average 1.2222222222222223) internal successors, (66), 54 states have internal predecessors, (66), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 12:04:29,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2022-01-31 12:04:29,092 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 54 [2022-01-31 12:04:29,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:04:29,092 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2022-01-31 12:04:29,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 18 states have internal predecessors, (68), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 12:04:29,093 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2022-01-31 12:04:29,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 12:04:29,093 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:04:29,093 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:04:29,113 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 12:04:29,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:04:29,294 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:04:29,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:04:29,294 INFO L85 PathProgramCache]: Analyzing trace with hash -292182650, now seen corresponding path program 3 times [2022-01-31 12:04:29,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:04:29,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800616533] [2022-01-31 12:04:29,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:04:29,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:04:29,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:04:29,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:04:29,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:04:29,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 12:04:29,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:04:29,379 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-01-31 12:04:29,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:04:29,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800616533] [2022-01-31 12:04:29,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800616533] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:04:29,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118099186] [2022-01-31 12:04:29,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 12:04:29,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:04:29,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:04:29,381 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 12:04:29,382 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 12:04:29,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-01-31 12:04:29,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 12:04:29,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-31 12:04:29,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:04:29,596 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-01-31 12:04:29,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 12:04:29,800 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-01-31 12:04:29,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118099186] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 12:04:29,800 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 12:04:29,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 16 [2022-01-31 12:04:29,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90540505] [2022-01-31 12:04:29,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 12:04:29,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 12:04:29,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:04:29,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 12:04:29,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-01-31 12:04:29,802 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand has 16 states, 16 states have (on average 4.25) internal successors, (68), 13 states have internal predecessors, (68), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 12:04:30,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:04:30,027 INFO L93 Difference]: Finished difference Result 80 states and 97 transitions. [2022-01-31 12:04:30,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 12:04:30,027 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 13 states have internal predecessors, (68), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 57 [2022-01-31 12:04:30,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:04:30,028 INFO L225 Difference]: With dead ends: 80 [2022-01-31 12:04:30,028 INFO L226 Difference]: Without dead ends: 80 [2022-01-31 12:04:30,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=470, Unknown=0, NotChecked=0, Total=650 [2022-01-31 12:04:30,029 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 170 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 12:04:30,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 30 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 12:04:30,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-01-31 12:04:30,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-01-31 12:04:30,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 72 states have (on average 1.25) internal successors, (90), 72 states have internal predecessors, (90), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 12:04:30,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 97 transitions. [2022-01-31 12:04:30,032 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 97 transitions. Word has length 57 [2022-01-31 12:04:30,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:04:30,033 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 97 transitions. [2022-01-31 12:04:30,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 13 states have internal predecessors, (68), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 12:04:30,033 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 97 transitions. [2022-01-31 12:04:30,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 12:04:30,033 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:04:30,033 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:04:30,052 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 12:04:30,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:04:30,251 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:04:30,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:04:30,251 INFO L85 PathProgramCache]: Analyzing trace with hash -582619515, now seen corresponding path program 4 times [2022-01-31 12:04:30,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:04:30,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705532746] [2022-01-31 12:04:30,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:04:30,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:04:30,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:04:30,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:04:30,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:04:30,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 12:04:30,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:04:30,333 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-01-31 12:04:30,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:04:30,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705532746] [2022-01-31 12:04:30,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705532746] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:04:30,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175977145] [2022-01-31 12:04:30,333 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 12:04:30,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:04:30,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:04:30,336 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 12:04:30,337 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 12:04:30,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 12:04:30,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 12:04:30,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-31 12:04:30,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:04:30,550 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-01-31 12:04:30,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 12:04:30,702 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-01-31 12:04:30,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175977145] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 12:04:30,703 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 12:04:30,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 21 [2022-01-31 12:04:30,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650047345] [2022-01-31 12:04:30,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 12:04:30,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 12:04:30,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:04:30,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 12:04:30,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-01-31 12:04:30,704 INFO L87 Difference]: Start difference. First operand 80 states and 97 transitions. Second operand has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 19 states have internal predecessors, (86), 3 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 12:04:31,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:04:31,923 INFO L93 Difference]: Finished difference Result 175 states and 224 transitions. [2022-01-31 12:04:31,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 12:04:31,924 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 19 states have internal predecessors, (86), 3 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 69 [2022-01-31 12:04:31,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:04:31,925 INFO L225 Difference]: With dead ends: 175 [2022-01-31 12:04:31,925 INFO L226 Difference]: Without dead ends: 175 [2022-01-31 12:04:31,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=971, Invalid=3061, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 12:04:31,926 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 293 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 12:04:31,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 39 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 12:04:31,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-01-31 12:04:31,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 116. [2022-01-31 12:04:31,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 108 states have (on average 1.2777777777777777) internal successors, (138), 108 states have internal predecessors, (138), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 12:04:31,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 145 transitions. [2022-01-31 12:04:31,931 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 145 transitions. Word has length 69 [2022-01-31 12:04:31,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:04:31,931 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 145 transitions. [2022-01-31 12:04:31,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.095238095238095) internal successors, (86), 19 states have internal predecessors, (86), 3 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 12:04:31,932 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 145 transitions. [2022-01-31 12:04:31,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 12:04:31,932 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:04:31,932 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:04:31,965 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 12:04:32,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:04:32,144 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:04:32,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:04:32,144 INFO L85 PathProgramCache]: Analyzing trace with hash -551286544, now seen corresponding path program 5 times [2022-01-31 12:04:32,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:04:32,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092423835] [2022-01-31 12:04:32,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:04:32,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:04:32,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:04:32,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:04:32,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:04:32,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 12:04:32,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:04:32,441 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-01-31 12:04:32,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:04:32,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092423835] [2022-01-31 12:04:32,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092423835] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:04:32,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705544043] [2022-01-31 12:04:32,442 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 12:04:32,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:04:32,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:04:32,443 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 12:04:32,444 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 12:04:32,582 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-01-31 12:04:32,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 12:04:32,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-31 12:04:32,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:04:32,639 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-31 12:04:32,640 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 11 treesize of output 11 [2022-01-31 12:04:32,772 INFO L387 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 11 treesize of output 7 [2022-01-31 12:04:33,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-01-31 12:04:33,232 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-01-31 12:04:33,232 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 19 treesize of output 10 [2022-01-31 12:04:33,273 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-01-31 12:04:33,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 12:04:33,358 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_320 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_~#array~0.base| v_ArrVal_320) |c_main_~#array~1.base|) |c_main_~#array~1.offset|) 0)) is different from false [2022-01-31 12:04:33,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705544043] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:04:33,359 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 12:04:33,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2022-01-31 12:04:33,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656688101] [2022-01-31 12:04:33,359 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 12:04:33,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 12:04:33,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:04:33,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 12:04:33,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=961, Unknown=9, NotChecked=62, Total=1122 [2022-01-31 12:04:33,361 INFO L87 Difference]: Start difference. First operand 116 states and 145 transitions. Second operand has 30 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 24 states have internal predecessors, (68), 5 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 12:04:34,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:04:34,183 INFO L93 Difference]: Finished difference Result 124 states and 153 transitions. [2022-01-31 12:04:34,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 12:04:34,184 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 24 states have internal predecessors, (68), 5 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 78 [2022-01-31 12:04:34,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:04:34,184 INFO L225 Difference]: With dead ends: 124 [2022-01-31 12:04:34,184 INFO L226 Difference]: Without dead ends: 124 [2022-01-31 12:04:34,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 70 SyntacticMatches, 7 SemanticMatches, 51 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=255, Invalid=2387, Unknown=14, NotChecked=100, Total=2756 [2022-01-31 12:04:34,187 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 83 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 12:04:34,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 176 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 722 Invalid, 0 Unknown, 49 Unchecked, 0.3s Time] [2022-01-31 12:04:34,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-01-31 12:04:34,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2022-01-31 12:04:34,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 112 states have (on average 1.2678571428571428) internal successors, (142), 113 states have internal predecessors, (142), 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 12:04:34,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 151 transitions. [2022-01-31 12:04:34,192 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 151 transitions. Word has length 78 [2022-01-31 12:04:34,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:04:34,192 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 151 transitions. [2022-01-31 12:04:34,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 24 states have internal predecessors, (68), 5 states have call successors, (7), 7 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 12:04:34,192 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 151 transitions. [2022-01-31 12:04:34,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-31 12:04:34,193 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:04:34,193 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:04:34,215 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-01-31 12:04:34,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:04:34,408 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:04:34,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:04:34,408 INFO L85 PathProgramCache]: Analyzing trace with hash 215004892, now seen corresponding path program 1 times [2022-01-31 12:04:34,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:04:34,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782401717] [2022-01-31 12:04:34,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:04:34,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:04:34,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:04:34,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:04:34,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:04:34,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 12:04:34,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:04:34,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 12:04:34,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:04:34,884 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 2 proven. 138 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-01-31 12:04:34,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:04:34,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782401717] [2022-01-31 12:04:34,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782401717] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:04:34,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247616399] [2022-01-31 12:04:34,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:04:34,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:04:34,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:04:34,888 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 12:04:34,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-31 12:04:34,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:04:34,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-31 12:04:34,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:04:35,012 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-31 12:04:35,013 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 11 treesize of output 11 [2022-01-31 12:04:35,114 INFO L387 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 15 treesize of output 11 [2022-01-31 12:04:35,185 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-31 12:04:35,186 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 1 case distinctions, treesize of input 25 treesize of output 24 [2022-01-31 12:04:35,567 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 16 treesize of output 18 [2022-01-31 12:04:35,766 INFO L353 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-01-31 12:04:35,767 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 21 treesize of output 10 [2022-01-31 12:04:35,814 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-01-31 12:04:35,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 12:04:35,956 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_405 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_~#array~0.base| v_ArrVal_405) |c_main_~#array~1.base|) (+ |c_main_~#array~1.offset| 4)) 1)) is different from false [2022-01-31 12:04:35,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247616399] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:04:35,957 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 12:04:35,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 37 [2022-01-31 12:04:35,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419002517] [2022-01-31 12:04:35,958 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 12:04:35,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 12:04:35,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:04:35,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 12:04:35,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1496, Unknown=11, NotChecked=78, Total=1722 [2022-01-31 12:04:35,959 INFO L87 Difference]: Start difference. First operand 122 states and 151 transitions. Second operand has 37 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 32 states have internal predecessors, (82), 8 states have call successors, (10), 9 states have call predecessors, (10), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-31 12:04:36,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:04:36,930 INFO L93 Difference]: Finished difference Result 132 states and 161 transitions. [2022-01-31 12:04:36,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 12:04:36,931 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 32 states have internal predecessors, (82), 8 states have call successors, (10), 9 states have call predecessors, (10), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 86 [2022-01-31 12:04:36,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:04:36,932 INFO L225 Difference]: With dead ends: 132 [2022-01-31 12:04:36,932 INFO L226 Difference]: Without dead ends: 132 [2022-01-31 12:04:36,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 84 SyntacticMatches, 8 SemanticMatches, 64 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=393, Invalid=3755, Unknown=16, NotChecked=126, Total=4290 [2022-01-31 12:04:36,933 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 120 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 12:04:36,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 214 Invalid, 946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 700 Invalid, 0 Unknown, 164 Unchecked, 0.3s Time] [2022-01-31 12:04:36,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-01-31 12:04:36,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2022-01-31 12:04:36,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 118 states have (on average 1.2542372881355932) internal successors, (148), 119 states have internal predecessors, (148), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 12:04:36,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 159 transitions. [2022-01-31 12:04:36,937 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 159 transitions. Word has length 86 [2022-01-31 12:04:36,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:04:36,937 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 159 transitions. [2022-01-31 12:04:36,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 32 states have internal predecessors, (82), 8 states have call successors, (10), 9 states have call predecessors, (10), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-31 12:04:36,938 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 159 transitions. [2022-01-31 12:04:36,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-01-31 12:04:36,938 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:04:36,938 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:04:36,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-31 12:04:37,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-31 12:04:37,139 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:04:37,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:04:37,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1130972984, now seen corresponding path program 2 times [2022-01-31 12:04:37,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:04:37,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518324576] [2022-01-31 12:04:37,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:04:37,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:04:37,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:04:37,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:04:37,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:04:37,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 12:04:37,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:04:37,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 12:04:37,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:04:37,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 12:04:37,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:04:37,638 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 4 proven. 144 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-01-31 12:04:37,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:04:37,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518324576] [2022-01-31 12:04:37,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518324576] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:04:37,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375275792] [2022-01-31 12:04:37,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 12:04:37,639 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:04:37,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:04:37,640 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 12:04:37,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-31 12:04:37,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 12:04:37,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 12:04:37,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 42 conjunts are in the unsatisfiable core [2022-01-31 12:04:37,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:04:37,773 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-01-31 12:04:37,773 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 11 treesize of output 11 [2022-01-31 12:04:37,852 INFO L387 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 15 treesize of output 11 [2022-01-31 12:04:37,914 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-31 12:04:37,914 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 1 case distinctions, treesize of input 25 treesize of output 24 [2022-01-31 12:04:37,958 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-31 12:04:37,958 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 1 case distinctions, treesize of input 25 treesize of output 24 [2022-01-31 12:04:38,340 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 16 treesize of output 18 [2022-01-31 12:04:38,632 INFO L353 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-01-31 12:04:38,633 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 21 treesize of output 10 [2022-01-31 12:04:38,683 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 1 proven. 143 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-01-31 12:04:38,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 12:04:38,892 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_492 (Array Int Int))) (= 2 (select (select (store |c_#memory_int| |c_~#array~0.base| v_ArrVal_492) |c_main_~#array~1.base|) (+ |c_main_~#array~1.offset| 8)))) is different from false [2022-01-31 12:04:38,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375275792] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:04:38,893 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 12:04:38,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2022-01-31 12:04:38,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900198891] [2022-01-31 12:04:38,893 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 12:04:38,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 12:04:38,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:04:38,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 12:04:38,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1645, Unknown=11, NotChecked=82, Total=1892 [2022-01-31 12:04:38,894 INFO L87 Difference]: Start difference. First operand 130 states and 159 transitions. Second operand has 38 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 33 states have internal predecessors, (88), 10 states have call successors, (12), 9 states have call predecessors, (12), 6 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-01-31 12:04:40,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:04:40,015 INFO L93 Difference]: Finished difference Result 140 states and 169 transitions. [2022-01-31 12:04:40,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 12:04:40,016 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 33 states have internal predecessors, (88), 10 states have call successors, (12), 9 states have call predecessors, (12), 6 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 94 [2022-01-31 12:04:40,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:04:40,017 INFO L225 Difference]: With dead ends: 140 [2022-01-31 12:04:40,017 INFO L226 Difference]: Without dead ends: 140 [2022-01-31 12:04:40,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 97 SyntacticMatches, 10 SemanticMatches, 65 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=421, Invalid=3857, Unknown=16, NotChecked=128, Total=4422 [2022-01-31 12:04:40,018 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 99 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 1163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 12:04:40,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 267 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 919 Invalid, 0 Unknown, 153 Unchecked, 0.4s Time] [2022-01-31 12:04:40,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-01-31 12:04:40,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2022-01-31 12:04:40,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 124 states have (on average 1.2419354838709677) internal successors, (154), 125 states have internal predecessors, (154), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 12:04:40,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 167 transitions. [2022-01-31 12:04:40,033 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 167 transitions. Word has length 94 [2022-01-31 12:04:40,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:04:40,034 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 167 transitions. [2022-01-31 12:04:40,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 33 states have internal predecessors, (88), 10 states have call successors, (12), 9 states have call predecessors, (12), 6 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-01-31 12:04:40,034 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 167 transitions. [2022-01-31 12:04:40,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 12:04:40,036 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:04:40,036 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:04:40,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-31 12:04:40,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:04:40,236 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:04:40,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:04:40,237 INFO L85 PathProgramCache]: Analyzing trace with hash 971116212, now seen corresponding path program 3 times [2022-01-31 12:04:40,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:04:40,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652023073] [2022-01-31 12:04:40,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:04:40,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:04:40,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:04:40,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:04:40,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:04:40,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 12:04:40,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:04:40,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 12:04:40,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:04:40,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 12:04:40,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:04:40,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 12:04:40,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:04:40,801 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 6 proven. 150 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-01-31 12:04:40,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:04:40,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652023073] [2022-01-31 12:04:40,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652023073] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:04:40,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498412647] [2022-01-31 12:04:40,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 12:04:40,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:04:40,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:04:40,802 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 12:04:40,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-31 12:04:40,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-01-31 12:04:40,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 12:04:41,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-31 12:04:41,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:04:41,074 INFO L353 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-01-31 12:04:41,074 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-01-31 12:04:41,136 INFO L387 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 15 treesize of output 11 [2022-01-31 12:04:41,222 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-01-31 12:04:41,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-01-31 12:04:41,268 INFO L353 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-01-31 12:04:41,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 30 [2022-01-31 12:04:41,370 INFO L353 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-01-31 12:04:41,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 34 [2022-01-31 12:04:41,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 12:04:41,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-01-31 12:04:42,373 INFO L353 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-01-31 12:04:42,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 10 [2022-01-31 12:04:42,436 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-01-31 12:04:42,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 12:04:42,648 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_581 (Array Int Int))) (= 3 (select (select (store |c_#memory_int| |c_~#array~0.base| v_ArrVal_581) |c_main_~#array~1.base|) (+ |c_main_~#array~1.offset| 12)))) is different from false [2022-01-31 12:04:42,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498412647] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:04:42,649 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 12:04:42,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 40 [2022-01-31 12:04:42,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586700485] [2022-01-31 12:04:42,649 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 12:04:42,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 12:04:42,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:04:42,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 12:04:42,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1884, Unknown=12, NotChecked=88, Total=2162 [2022-01-31 12:04:42,650 INFO L87 Difference]: Start difference. First operand 138 states and 167 transitions. Second operand has 40 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 35 states have internal predecessors, (93), 12 states have call successors, (14), 9 states have call predecessors, (14), 6 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2022-01-31 12:04:44,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:04:44,235 INFO L93 Difference]: Finished difference Result 149 states and 178 transitions. [2022-01-31 12:04:44,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 12:04:44,235 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 35 states have internal predecessors, (93), 12 states have call successors, (14), 9 states have call predecessors, (14), 6 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) Word has length 102 [2022-01-31 12:04:44,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:04:44,236 INFO L225 Difference]: With dead ends: 149 [2022-01-31 12:04:44,236 INFO L226 Difference]: Without dead ends: 149 [2022-01-31 12:04:44,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 114 SyntacticMatches, 14 SemanticMatches, 74 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1418 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=539, Invalid=4998, Unknown=17, NotChecked=146, Total=5700 [2022-01-31 12:04:44,238 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 121 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 1066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 12:04:44,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 239 Invalid, 1066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 765 Invalid, 0 Unknown, 179 Unchecked, 0.3s Time] [2022-01-31 12:04:44,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-01-31 12:04:44,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 146. [2022-01-31 12:04:44,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 130 states have (on average 1.2307692307692308) internal successors, (160), 131 states have internal predecessors, (160), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 12:04:44,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 175 transitions. [2022-01-31 12:04:44,241 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 175 transitions. Word has length 102 [2022-01-31 12:04:44,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:04:44,241 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 175 transitions. [2022-01-31 12:04:44,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 35 states have internal predecessors, (93), 12 states have call successors, (14), 9 states have call predecessors, (14), 6 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2022-01-31 12:04:44,243 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 175 transitions. [2022-01-31 12:04:44,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-31 12:04:44,244 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:04:44,244 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:04:44,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-31 12:04:44,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-31 12:04:44,458 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:04:44,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:04:44,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1541490528, now seen corresponding path program 4 times [2022-01-31 12:04:44,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:04:44,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24233584] [2022-01-31 12:04:44,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:04:44,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:04:44,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:04:45,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:04:45,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:04:45,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 12:04:45,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:04:45,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 12:04:45,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:04:45,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 12:04:45,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:04:45,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 12:04:45,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:04:45,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 12:04:45,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:04:45,137 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 8 proven. 168 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-01-31 12:04:45,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:04:45,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24233584] [2022-01-31 12:04:45,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24233584] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:04:45,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162475808] [2022-01-31 12:04:45,138 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 12:04:45,138 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:04:45,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:04:45,139 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 12:04:45,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-31 12:04:45,247 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 12:04:45,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 12:04:45,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 108 conjunts are in the unsatisfiable core [2022-01-31 12:04:45,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:04:45,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-31 12:04:45,312 INFO L353 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-01-31 12:04:45,312 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 30 treesize of output 29 [2022-01-31 12:04:45,346 INFO L353 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-01-31 12:04:45,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-31 12:04:45,378 INFO L353 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-01-31 12:04:45,378 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 30 treesize of output 29 [2022-01-31 12:04:45,411 INFO L353 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-01-31 12:04:45,411 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 30 treesize of output 29 [2022-01-31 12:04:47,136 INFO L353 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-01-31 12:04:47,136 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 26 treesize of output 12 [2022-01-31 12:04:47,232 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 5 proven. 271 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-01-31 12:04:47,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 12:04:52,568 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 13 proven. 52 refuted. 102 times theorem prover too weak. 152 trivial. 0 not checked. [2022-01-31 12:04:52,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162475808] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 12:04:52,568 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 12:04:52,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 33, 21] total 65 [2022-01-31 12:04:52,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295630065] [2022-01-31 12:04:52,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 12:04:52,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 12:04:52,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:04:52,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 12:04:52,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=3707, Unknown=3, NotChecked=0, Total=4160 [2022-01-31 12:04:52,570 INFO L87 Difference]: Start difference. First operand 146 states and 175 transitions. Second operand has 65 states, 63 states have (on average 2.6825396825396823) internal successors, (169), 61 states have internal predecessors, (169), 19 states have call successors, (22), 8 states have call predecessors, (22), 6 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) [2022-01-31 12:05:16,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:05:16,088 INFO L93 Difference]: Finished difference Result 391 states and 498 transitions. [2022-01-31 12:05:16,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 12:05:16,089 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 63 states have (on average 2.6825396825396823) internal successors, (169), 61 states have internal predecessors, (169), 19 states have call successors, (22), 8 states have call predecessors, (22), 6 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) Word has length 110 [2022-01-31 12:05:16,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:05:16,090 INFO L225 Difference]: With dead ends: 391 [2022-01-31 12:05:16,091 INFO L226 Difference]: Without dead ends: 391 [2022-01-31 12:05:16,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 188 SyntacticMatches, 24 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 5015 ImplicationChecksByTransitivity, 28.8s TimeCoverageRelationStatistics Valid=1417, Invalid=12142, Unknown=13, NotChecked=0, Total=13572 [2022-01-31 12:05:16,095 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 222 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 1775 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 2794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 1775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 832 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 12:05:16,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 174 Invalid, 2794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 1775 Invalid, 0 Unknown, 832 Unchecked, 0.7s Time] [2022-01-31 12:05:16,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-01-31 12:05:16,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 154. [2022-01-31 12:05:16,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 136 states have (on average 1.2205882352941178) internal successors, (166), 137 states have internal predecessors, (166), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 12:05:16,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 183 transitions. [2022-01-31 12:05:16,101 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 183 transitions. Word has length 110 [2022-01-31 12:05:16,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:05:16,101 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 183 transitions. [2022-01-31 12:05:16,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 63 states have (on average 2.6825396825396823) internal successors, (169), 61 states have internal predecessors, (169), 19 states have call successors, (22), 8 states have call predecessors, (22), 6 states have return successors, (17), 17 states have call predecessors, (17), 16 states have call successors, (17) [2022-01-31 12:05:16,101 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 183 transitions. [2022-01-31 12:05:16,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-01-31 12:05:16,102 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 12:05:16,102 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 12:05:16,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-31 12:05:16,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-31 12:05:16,311 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 12:05:16,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 12:05:16,311 INFO L85 PathProgramCache]: Analyzing trace with hash -289884532, now seen corresponding path program 5 times [2022-01-31 12:05:16,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 12:05:16,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365372330] [2022-01-31 12:05:16,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 12:05:16,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 12:05:16,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:05:16,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 12:05:16,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:05:16,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-01-31 12:05:16,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:05:16,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 12:05:16,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:05:16,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 12:05:16,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:05:16,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 12:05:16,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:05:16,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 12:05:16,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:05:16,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 12:05:16,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 12:05:16,410 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 43 proven. 17 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2022-01-31 12:05:16,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 12:05:16,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365372330] [2022-01-31 12:05:16,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365372330] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 12:05:16,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039800423] [2022-01-31 12:05:16,410 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 12:05:16,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 12:05:16,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 12:05:16,411 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 12:05:16,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-31 12:05:16,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-01-31 12:05:16,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 12:05:16,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 12:05:16,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 12:05:16,724 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2022-01-31 12:05:16,725 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 12:05:16,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039800423] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 12:05:16,725 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 12:05:16,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 11 [2022-01-31 12:05:16,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937341985] [2022-01-31 12:05:16,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 12:05:16,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 12:05:16,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 12:05:16,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 12:05:16,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-01-31 12:05:16,726 INFO L87 Difference]: Start difference. First operand 154 states and 183 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-01-31 12:05:16,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 12:05:16,758 INFO L93 Difference]: Finished difference Result 147 states and 175 transitions. [2022-01-31 12:05:16,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 12:05:16,758 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 118 [2022-01-31 12:05:16,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 12:05:16,758 INFO L225 Difference]: With dead ends: 147 [2022-01-31 12:05:16,758 INFO L226 Difference]: Without dead ends: 0 [2022-01-31 12:05:16,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-01-31 12:05:16,760 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 12:05:16,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 154 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 12:05:16,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-01-31 12:05:16,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-01-31 12:05:16,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-31 12:05:16,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-01-31 12:05:16,761 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 118 [2022-01-31 12:05:16,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 12:05:16,761 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-01-31 12:05:16,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-01-31 12:05:16,761 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-01-31 12:05:16,761 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-01-31 12:05:16,763 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-31 12:05:16,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-31 12:05:16,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-31 12:05:16,972 INFO L732 BasicCegarLoop]: Path program histogram: [5, 5, 2, 1, 1, 1] [2022-01-31 12:05:16,973 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-31 12:05:16,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 12:05:16 BasicIcfg [2022-01-31 12:05:16,977 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-31 12:05:16,977 INFO L158 Benchmark]: Toolchain (without parser) took 52711.04ms. Allocated memory was 185.6MB in the beginning and 348.1MB in the end (delta: 162.5MB). Free memory was 132.3MB in the beginning and 120.9MB in the end (delta: 11.4MB). Peak memory consumption was 175.9MB. Max. memory is 8.0GB. [2022-01-31 12:05:16,978 INFO L158 Benchmark]: CDTParser took 0.48ms. Allocated memory is still 185.6MB. Free memory is still 148.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 12:05:16,978 INFO L158 Benchmark]: CACSL2BoogieTranslator took 214.30ms. Allocated memory is still 185.6MB. Free memory was 132.2MB in the beginning and 156.8MB in the end (delta: -24.6MB). Peak memory consumption was 11.0MB. Max. memory is 8.0GB. [2022-01-31 12:05:16,978 INFO L158 Benchmark]: Boogie Preprocessor took 41.30ms. Allocated memory is still 185.6MB. Free memory was 156.8MB in the beginning and 154.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-31 12:05:16,978 INFO L158 Benchmark]: RCFGBuilder took 253.31ms. Allocated memory is still 185.6MB. Free memory was 154.7MB in the beginning and 143.2MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-01-31 12:05:16,979 INFO L158 Benchmark]: IcfgTransformer took 31.45ms. Allocated memory is still 185.6MB. Free memory was 143.2MB in the beginning and 142.1MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-31 12:05:16,979 INFO L158 Benchmark]: TraceAbstraction took 52163.70ms. Allocated memory was 185.6MB in the beginning and 348.1MB in the end (delta: 162.5MB). Free memory was 141.6MB in the beginning and 120.9MB in the end (delta: 20.7MB). Peak memory consumption was 184.8MB. Max. memory is 8.0GB. [2022-01-31 12:05:16,980 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.48ms. Allocated memory is still 185.6MB. Free memory is still 148.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 214.30ms. Allocated memory is still 185.6MB. Free memory was 132.2MB in the beginning and 156.8MB in the end (delta: -24.6MB). Peak memory consumption was 11.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 41.30ms. Allocated memory is still 185.6MB. Free memory was 156.8MB in the beginning and 154.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 253.31ms. Allocated memory is still 185.6MB. Free memory was 154.7MB in the beginning and 143.2MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 31.45ms. Allocated memory is still 185.6MB. Free memory was 143.2MB in the beginning and 142.1MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 52163.70ms. Allocated memory was 185.6MB in the beginning and 348.1MB in the end (delta: 162.5MB). Free memory was 141.6MB in the beginning and 120.9MB in the end (delta: 20.7MB). Peak memory consumption was 184.8MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 52.1s, OverallIterations: 15, TraceHistogramMax: 10, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 31.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1852 SdHoareTripleChecker+Valid, 3.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1844 mSDsluCounter, 1499 SdHoareTripleChecker+Invalid, 2.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1377 IncrementalHoareTripleChecker+Unchecked, 1099 mSDsCounter, 970 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6845 IncrementalHoareTripleChecker+Invalid, 9192 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 970 mSolverCounterUnsat, 400 mSDtfsCounter, 6845 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1848 GetRequests, 1198 SyntacticMatches, 67 SemanticMatches, 583 ConstructedPredicates, 4 IntricatePredicates, 1 DeprecatedPredicates, 10536 ImplicationChecksByTransitivity, 37.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=154occurred in iteration=14, InterpolantAutomatonStates: 317, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 15 MinimizatonAttempts, 378 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 16.6s InterpolantComputationTime, 1768 NumberOfCodeBlocks, 1761 NumberOfCodeBlocksAsserted, 69 NumberOfCheckSat, 2109 ConstructedInterpolants, 274 QuantifiedInterpolants, 17169 SizeOfPredicates, 64 NumberOfNonLiveVariables, 3096 ConjunctsInSsa, 317 ConjunctsInUnsatCore, 34 InterpolantComputations, 4 PerfectInterpolantSequences, 2788/5062 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-01-31 12:05:17,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...