/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/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/loop-invgen/string_concat-noarr.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 09:43:24,287 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 09:43:24,289 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 09:43:24,330 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 09:43:24,345 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 09:43:24,346 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 09:43:24,347 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 09:43:24,350 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 09:43:24,351 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 09:43:24,352 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 09:43:24,356 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 09:43:24,363 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 09:43:24,365 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 09:43:24,366 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 09:43:24,366 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 09:43:24,367 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 09:43:24,369 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 09:43:24,374 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 09:43:24,381 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 09:43:24,382 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 09:43:24,383 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 09:43:24,384 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-06 09:43:24,409 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 09:43:24,410 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 09:43:24,411 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-06 09:43:24,411 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-06 09:43:24,412 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-06 09:43:24,412 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-06 09:43:24,412 INFO L138 SettingsManager]: * Use SBE=true [2022-04-06 09:43:24,412 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 09:43:24,412 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 09:43:24,413 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 09:43:24,413 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 09:43:24,413 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 09:43:24,413 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 09:43:24,413 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 09:43:24,414 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 09:43:24,414 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 09:43:24,414 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 09:43:24,414 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 09:43:24,414 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 09:43:24,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 09:43:24,414 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 09:43:24,414 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-06 09:43:24,415 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-06 09:43:24,415 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 09:43:24,415 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-06 09:43:24,415 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 09:43:24,415 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-06 09:43:24,415 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-06 09:43:24,416 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 09:43:24,416 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 09:43:24,638 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 09:43:24,660 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 09:43:24,662 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 09:43:24,663 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 09:43:24,663 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 09:43:24,664 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/string_concat-noarr.i [2022-04-06 09:43:24,719 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/137fe2431/e5b60f1faba14bd6af5b18a55cfe99d3/FLAG3be9489b9 [2022-04-06 09:43:25,097 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 09:43:25,098 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/string_concat-noarr.i [2022-04-06 09:43:25,124 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/137fe2431/e5b60f1faba14bd6af5b18a55cfe99d3/FLAG3be9489b9 [2022-04-06 09:43:25,141 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/137fe2431/e5b60f1faba14bd6af5b18a55cfe99d3 [2022-04-06 09:43:25,144 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 09:43:25,145 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 09:43:25,148 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 09:43:25,148 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 09:43:25,151 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 09:43:25,152 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 09:43:25" (1/1) ... [2022-04-06 09:43:25,153 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4aad96cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:43:25, skipping insertion in model container [2022-04-06 09:43:25,153 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 09:43:25" (1/1) ... [2022-04-06 09:43:25,159 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 09:43:25,171 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 09:43:25,339 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/string_concat-noarr.i[893,906] [2022-04-06 09:43:25,348 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 09:43:25,354 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 09:43:25,364 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/string_concat-noarr.i[893,906] [2022-04-06 09:43:25,367 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 09:43:25,378 INFO L208 MainTranslator]: Completed translation [2022-04-06 09:43:25,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:43:25 WrapperNode [2022-04-06 09:43:25,378 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 09:43:25,379 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 09:43:25,379 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 09:43:25,379 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 09:43:25,386 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:43:25" (1/1) ... [2022-04-06 09:43:25,387 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:43:25" (1/1) ... [2022-04-06 09:43:25,392 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:43:25" (1/1) ... [2022-04-06 09:43:25,392 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:43:25" (1/1) ... [2022-04-06 09:43:25,395 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:43:25" (1/1) ... [2022-04-06 09:43:25,398 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:43:25" (1/1) ... [2022-04-06 09:43:25,399 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:43:25" (1/1) ... [2022-04-06 09:43:25,401 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 09:43:25,402 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 09:43:25,402 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 09:43:25,402 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 09:43:25,403 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:43:25" (1/1) ... [2022-04-06 09:43:25,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 09:43:25,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:43:25,429 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) [2022-04-06 09:43:25,430 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 [2022-04-06 09:43:25,454 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 09:43:25,454 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 09:43:25,454 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 09:43:25,454 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 09:43:25,454 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 09:43:25,455 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 09:43:25,455 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 09:43:25,455 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 09:43:25,455 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-04-06 09:43:25,455 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-04-06 09:43:25,455 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 09:43:25,455 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 09:43:25,456 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 09:43:25,456 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 09:43:25,456 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 09:43:25,456 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 09:43:25,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 09:43:25,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 09:43:25,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 09:43:25,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 09:43:25,460 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 09:43:25,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 09:43:25,512 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 09:43:25,513 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 09:43:25,602 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 09:43:25,607 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 09:43:25,607 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-06 09:43:25,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 09:43:25 BoogieIcfgContainer [2022-04-06 09:43:25,609 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 09:43:25,610 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 09:43:25,610 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 09:43:25,611 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 09:43:25,614 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 09:43:25" (1/1) ... [2022-04-06 09:43:25,616 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-06 09:43:25,628 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 09:43:25 BasicIcfg [2022-04-06 09:43:25,628 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 09:43:25,630 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 09:43:25,630 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 09:43:25,635 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 09:43:25,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 09:43:25" (1/4) ... [2022-04-06 09:43:25,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d7a29ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 09:43:25, skipping insertion in model container [2022-04-06 09:43:25,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:43:25" (2/4) ... [2022-04-06 09:43:25,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d7a29ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 09:43:25, skipping insertion in model container [2022-04-06 09:43:25,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 09:43:25" (3/4) ... [2022-04-06 09:43:25,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d7a29ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 09:43:25, skipping insertion in model container [2022-04-06 09:43:25,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 09:43:25" (4/4) ... [2022-04-06 09:43:25,638 INFO L111 eAbstractionObserver]: Analyzing ICFG string_concat-noarr.iqvasr [2022-04-06 09:43:25,642 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-06 09:43:25,642 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 09:43:25,677 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 09:43:25,683 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 09:43:25,683 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 09:43:25,696 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 19 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 09:43:25,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-04-06 09:43:25,700 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:43:25,700 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:43:25,701 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:43:25,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:43:25,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1427438595, now seen corresponding path program 1 times [2022-04-06 09:43:25,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:43:25,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17627172] [2022-04-06 09:43:25,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:43:25,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:43:25,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:25,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:43:25,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:25,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:43:25,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:43:25,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17627172] [2022-04-06 09:43:25,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17627172] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 09:43:25,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 09:43:25,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 09:43:25,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362267091] [2022-04-06 09:43:25,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 09:43:25,842 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 09:43:25,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:43:25,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 09:43:25,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 09:43:25,866 INFO L87 Difference]: Start difference. First operand has 26 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 19 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:43:25,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:43:25,896 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2022-04-06 09:43:25,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 09:43:25,898 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-04-06 09:43:25,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:43:25,903 INFO L225 Difference]: With dead ends: 43 [2022-04-06 09:43:25,904 INFO L226 Difference]: Without dead ends: 18 [2022-04-06 09:43:25,908 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 09:43:25,923 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 09:43:25,924 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 31 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 09:43:25,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-04-06 09:43:25,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-04-06 09:43:25,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:43:25,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-04-06 09:43:25,971 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2022-04-06 09:43:25,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:43:25,971 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-04-06 09:43:25,972 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:43:25,972 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-04-06 09:43:25,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 09:43:25,973 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:43:25,973 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:43:25,973 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 09:43:25,973 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:43:25,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:43:25,974 INFO L85 PathProgramCache]: Analyzing trace with hash -548355260, now seen corresponding path program 1 times [2022-04-06 09:43:25,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:43:25,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490883452] [2022-04-06 09:43:25,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:43:25,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:43:26,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:26,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:43:26,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:26,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:43:26,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:43:26,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490883452] [2022-04-06 09:43:26,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490883452] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 09:43:26,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 09:43:26,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 09:43:26,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513057773] [2022-04-06 09:43:26,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 09:43:26,127 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 09:43:26,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:43:26,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 09:43:26,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 09:43:26,129 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:43:26,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:43:26,201 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2022-04-06 09:43:26,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 09:43:26,202 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-04-06 09:43:26,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:43:26,203 INFO L225 Difference]: With dead ends: 29 [2022-04-06 09:43:26,203 INFO L226 Difference]: Without dead ends: 23 [2022-04-06 09:43:26,204 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-04-06 09:43:26,205 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 21 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 09:43:26,206 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 30 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 09:43:26,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-04-06 09:43:26,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2022-04-06 09:43:26,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:43:26,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-04-06 09:43:26,211 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2022-04-06 09:43:26,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:43:26,211 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-04-06 09:43:26,212 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:43:26,212 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-04-06 09:43:26,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-04-06 09:43:26,212 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:43:26,213 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:43:26,213 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 09:43:26,213 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:43:26,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:43:26,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1217379968, now seen corresponding path program 1 times [2022-04-06 09:43:26,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:43:26,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019055250] [2022-04-06 09:43:26,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:43:26,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:43:26,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:26,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:43:26,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:26,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:43:26,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:43:26,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019055250] [2022-04-06 09:43:26,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019055250] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:43:26,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753357521] [2022-04-06 09:43:26,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:43:26,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:26,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:43:26,291 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) [2022-04-06 09:43:26,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 09:43:26,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:26,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 09:43:26,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:43:26,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:43:26,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:43:26,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:43:26,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753357521] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:43:26,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:43:26,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-04-06 09:43:26,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251411232] [2022-04-06 09:43:26,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:43:26,639 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 09:43:26,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:43:26,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 09:43:26,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-04-06 09:43:26,640 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 9 states have internal predecessors, (33), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:43:26,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:43:26,819 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2022-04-06 09:43:26,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 09:43:26,819 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 9 states have internal predecessors, (33), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-04-06 09:43:26,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:43:26,823 INFO L225 Difference]: With dead ends: 52 [2022-04-06 09:43:26,823 INFO L226 Difference]: Without dead ends: 42 [2022-04-06 09:43:26,826 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2022-04-06 09:43:26,829 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 58 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 09:43:26,830 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 50 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 09:43:26,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-04-06 09:43:26,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 32. [2022-04-06 09:43:26,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:43:26,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-04-06 09:43:26,844 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 19 [2022-04-06 09:43:26,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:43:26,846 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-04-06 09:43:26,846 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 9 states have internal predecessors, (33), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:43:26,846 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-04-06 09:43:26,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-06 09:43:26,847 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:43:26,847 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:43:26,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 09:43:27,061 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:27,061 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:43:27,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:43:27,062 INFO L85 PathProgramCache]: Analyzing trace with hash -245336524, now seen corresponding path program 2 times [2022-04-06 09:43:27,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:43:27,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859951103] [2022-04-06 09:43:27,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:43:27,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:43:27,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:27,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:43:27,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:27,180 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:43:27,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:43:27,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859951103] [2022-04-06 09:43:27,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859951103] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:43:27,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180605765] [2022-04-06 09:43:27,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 09:43:27,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:27,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:43:27,183 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) [2022-04-06 09:43:27,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 09:43:27,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 09:43:27,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:43:27,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 09:43:27,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:43:27,332 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:43:27,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:43:27,457 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:43:27,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180605765] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:43:27,457 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:43:27,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-04-06 09:43:27,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103357890] [2022-04-06 09:43:27,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:43:27,461 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 09:43:27,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:43:27,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 09:43:27,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-04-06 09:43:27,465 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 15 states have internal predecessors, (45), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:43:27,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:43:27,772 INFO L93 Difference]: Finished difference Result 96 states and 112 transitions. [2022-04-06 09:43:27,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 09:43:27,772 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 15 states have internal predecessors, (45), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-04-06 09:43:27,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:43:27,774 INFO L225 Difference]: With dead ends: 96 [2022-04-06 09:43:27,774 INFO L226 Difference]: Without dead ends: 80 [2022-04-06 09:43:27,775 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=234, Invalid=636, Unknown=0, NotChecked=0, Total=870 [2022-04-06 09:43:27,776 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 132 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 09:43:27,777 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 50 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 09:43:27,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-04-06 09:43:27,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 53. [2022-04-06 09:43:27,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 48 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:43:27,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2022-04-06 09:43:27,783 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 25 [2022-04-06 09:43:27,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:43:27,784 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2022-04-06 09:43:27,784 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 15 states have internal predecessors, (45), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:43:27,784 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2022-04-06 09:43:27,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 09:43:27,785 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:43:27,785 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:43:27,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 09:43:28,003 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-04-06 09:43:28,004 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:43:28,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:43:28,004 INFO L85 PathProgramCache]: Analyzing trace with hash -754687844, now seen corresponding path program 3 times [2022-04-06 09:43:28,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:43:28,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703839179] [2022-04-06 09:43:28,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:43:28,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:43:28,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:28,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:43:28,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:28,158 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:43:28,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:43:28,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703839179] [2022-04-06 09:43:28,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703839179] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:43:28,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793746997] [2022-04-06 09:43:28,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 09:43:28,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:28,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:43:28,161 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) [2022-04-06 09:43:28,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 09:43:28,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-04-06 09:43:28,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:43:28,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 09:43:28,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:43:28,317 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:43:28,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:43:28,610 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:43:28,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793746997] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:43:28,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:43:28,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 30 [2022-04-06 09:43:28,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835708148] [2022-04-06 09:43:28,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:43:28,611 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 09:43:28,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:43:28,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 09:43:28,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=558, Unknown=0, NotChecked=0, Total=870 [2022-04-06 09:43:28,613 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 27 states have internal predecessors, (69), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:43:29,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:43:29,260 INFO L93 Difference]: Finished difference Result 216 states and 250 transitions. [2022-04-06 09:43:29,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 09:43:29,261 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 27 states have internal predecessors, (69), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-04-06 09:43:29,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:43:29,262 INFO L225 Difference]: With dead ends: 216 [2022-04-06 09:43:29,262 INFO L226 Difference]: Without dead ends: 188 [2022-04-06 09:43:29,264 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=876, Invalid=1986, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 09:43:29,265 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 320 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 09:43:29,265 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 45 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 09:43:29,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-04-06 09:43:29,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 95. [2022-04-06 09:43:29,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.1444444444444444) internal successors, (103), 90 states have internal predecessors, (103), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:43:29,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 107 transitions. [2022-04-06 09:43:29,273 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 107 transitions. Word has length 37 [2022-04-06 09:43:29,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:43:29,273 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 107 transitions. [2022-04-06 09:43:29,273 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 27 states have internal predecessors, (69), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:43:29,274 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 107 transitions. [2022-04-06 09:43:29,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 09:43:29,275 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:43:29,279 INFO L499 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:43:29,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 09:43:29,504 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:29,504 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:43:29,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:43:29,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1007083156, now seen corresponding path program 4 times [2022-04-06 09:43:29,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:43:29,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95838316] [2022-04-06 09:43:29,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:43:29,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:43:29,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:29,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:43:29,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:29,892 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:43:29,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:43:29,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95838316] [2022-04-06 09:43:29,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95838316] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:43:29,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042907678] [2022-04-06 09:43:29,893 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 09:43:29,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:29,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:43:29,895 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) [2022-04-06 09:43:29,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 09:43:29,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 09:43:29,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:43:29,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 09:43:29,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:43:30,097 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:43:30,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:43:30,851 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:43:30,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042907678] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:43:30,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:43:30,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 54 [2022-04-06 09:43:30,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632288056] [2022-04-06 09:43:30,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:43:30,852 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-04-06 09:43:30,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:43:30,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-04-06 09:43:30,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1188, Invalid=1674, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 09:43:30,855 INFO L87 Difference]: Start difference. First operand 95 states and 107 transitions. Second operand has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 51 states have internal predecessors, (117), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:43:32,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:43:32,511 INFO L93 Difference]: Finished difference Result 564 states and 634 transitions. [2022-04-06 09:43:32,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-04-06 09:43:32,511 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 51 states have internal predecessors, (117), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-04-06 09:43:32,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:43:32,514 INFO L225 Difference]: With dead ends: 564 [2022-04-06 09:43:32,514 INFO L226 Difference]: Without dead ends: 512 [2022-04-06 09:43:32,518 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1815 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3456, Invalid=6846, Unknown=0, NotChecked=0, Total=10302 [2022-04-06 09:43:32,519 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 904 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 373 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 904 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 373 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 09:43:32,519 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [904 Valid, 50 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [373 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 09:43:32,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2022-04-06 09:43:32,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 179. [2022-04-06 09:43:32,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.1436781609195403) internal successors, (199), 174 states have internal predecessors, (199), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:43:32,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 203 transitions. [2022-04-06 09:43:32,531 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 203 transitions. Word has length 61 [2022-04-06 09:43:32,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:43:32,532 INFO L478 AbstractCegarLoop]: Abstraction has 179 states and 203 transitions. [2022-04-06 09:43:32,532 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 51 states have internal predecessors, (117), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:43:32,532 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 203 transitions. [2022-04-06 09:43:32,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-04-06 09:43:32,533 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:43:32,533 INFO L499 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:43:32,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 09:43:32,748 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:32,748 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:43:32,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:43:32,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1177441036, now seen corresponding path program 5 times [2022-04-06 09:43:32,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:43:32,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519290568] [2022-04-06 09:43:32,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:43:32,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:43:32,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:33,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:43:33,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:33,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:43:33,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:43:33,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519290568] [2022-04-06 09:43:33,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519290568] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:43:33,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959286051] [2022-04-06 09:43:33,758 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-06 09:43:33,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:33,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:43:33,759 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) [2022-04-06 09:43:33,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 09:43:33,878 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2022-04-06 09:43:33,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:43:33,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 50 conjunts are in the unsatisfiable core [2022-04-06 09:43:33,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:43:34,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:43:34,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:43:36,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:43:36,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959286051] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:43:36,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:43:36,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 51] total 102 [2022-04-06 09:43:36,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217885792] [2022-04-06 09:43:36,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:43:36,592 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-04-06 09:43:36,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:43:36,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-04-06 09:43:36,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4668, Invalid=5634, Unknown=0, NotChecked=0, Total=10302 [2022-04-06 09:43:36,596 INFO L87 Difference]: Start difference. First operand 179 states and 203 transitions. Second operand has 102 states, 102 states have (on average 2.088235294117647) internal successors, (213), 99 states have internal predecessors, (213), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:43:41,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:43:41,582 INFO L93 Difference]: Finished difference Result 1692 states and 1834 transitions. [2022-04-06 09:43:41,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-04-06 09:43:41,582 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.088235294117647) internal successors, (213), 99 states have internal predecessors, (213), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 109 [2022-04-06 09:43:41,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:43:41,587 INFO L225 Difference]: With dead ends: 1692 [2022-04-06 09:43:41,587 INFO L226 Difference]: Without dead ends: 1592 [2022-04-06 09:43:41,596 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 169 SyntacticMatches, 1 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6531 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=13800, Invalid=25206, Unknown=0, NotChecked=0, Total=39006 [2022-04-06 09:43:41,597 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1694 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 780 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1694 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 780 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 09:43:41,597 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1694 Valid, 65 Invalid, 1478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [780 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 09:43:41,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2022-04-06 09:43:41,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 347. [2022-04-06 09:43:41,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 342 states have (on average 1.1432748538011697) internal successors, (391), 342 states have internal predecessors, (391), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:43:41,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 395 transitions. [2022-04-06 09:43:41,614 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 395 transitions. Word has length 109 [2022-04-06 09:43:41,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:43:41,615 INFO L478 AbstractCegarLoop]: Abstraction has 347 states and 395 transitions. [2022-04-06 09:43:41,615 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.088235294117647) internal successors, (213), 99 states have internal predecessors, (213), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:43:41,615 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 395 transitions. [2022-04-06 09:43:41,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-04-06 09:43:41,618 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:43:41,618 INFO L499 BasicCegarLoop]: trace histogram [95, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:43:41,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 09:43:41,831 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:41,832 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:43:41,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:43:41,832 INFO L85 PathProgramCache]: Analyzing trace with hash -527993268, now seen corresponding path program 6 times [2022-04-06 09:43:41,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:43:41,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083714619] [2022-04-06 09:43:41,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:43:41,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:43:41,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:44,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:43:44,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:43:44,812 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:43:44,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:43:44,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083714619] [2022-04-06 09:43:44,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083714619] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:43:44,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059685467] [2022-04-06 09:43:44,812 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 09:43:44,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:43:44,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:43:44,816 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) [2022-04-06 09:43:44,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 09:43:45,017 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2022-04-06 09:43:45,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 09:43:45,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 809 conjuncts, 98 conjunts are in the unsatisfiable core [2022-04-06 09:43:45,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:43:45,489 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:43:45,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:43:54,131 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:43:54,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059685467] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:43:54,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:43:54,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 99, 99] total 198 [2022-04-06 09:43:54,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755723108] [2022-04-06 09:43:54,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:43:54,132 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 198 states [2022-04-06 09:43:54,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:43:54,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 198 interpolants. [2022-04-06 09:43:54,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18540, Invalid=20466, Unknown=0, NotChecked=0, Total=39006 [2022-04-06 09:43:54,138 INFO L87 Difference]: Start difference. First operand 347 states and 395 transitions. Second operand has 198 states, 198 states have (on average 2.0454545454545454) internal successors, (405), 195 states have internal predecessors, (405), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:44:19,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:44:19,859 INFO L93 Difference]: Finished difference Result 5676 states and 5962 transitions. [2022-04-06 09:44:19,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2022-04-06 09:44:19,860 INFO L78 Accepts]: Start accepts. Automaton has has 198 states, 198 states have (on average 2.0454545454545454) internal successors, (405), 195 states have internal predecessors, (405), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 205 [2022-04-06 09:44:19,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:44:19,875 INFO L225 Difference]: With dead ends: 5676 [2022-04-06 09:44:19,875 INFO L226 Difference]: Without dead ends: 5480 [2022-04-06 09:44:19,887 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 702 GetRequests, 313 SyntacticMatches, 1 SemanticMatches, 388 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24603 ImplicationChecksByTransitivity, 22.2s TimeCoverageRelationStatistics Valid=55224, Invalid=96486, Unknown=0, NotChecked=0, Total=151710 [2022-04-06 09:44:19,888 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 4158 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1317 mSolverCounterSat, 1692 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4158 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 3009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1692 IncrementalHoareTripleChecker+Valid, 1317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-04-06 09:44:19,888 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4158 Valid, 55 Invalid, 3009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1692 Valid, 1317 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-04-06 09:44:19,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5480 states. [2022-04-06 09:44:19,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5480 to 683. [2022-04-06 09:44:19,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 678 states have (on average 1.1430678466076696) internal successors, (775), 678 states have internal predecessors, (775), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:44:19,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 779 transitions. [2022-04-06 09:44:19,921 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 779 transitions. Word has length 205 [2022-04-06 09:44:19,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:44:19,921 INFO L478 AbstractCegarLoop]: Abstraction has 683 states and 779 transitions. [2022-04-06 09:44:19,922 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 198 states, 198 states have (on average 2.0454545454545454) internal successors, (405), 195 states have internal predecessors, (405), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:44:19,922 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 779 transitions. [2022-04-06 09:44:19,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2022-04-06 09:44:19,928 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:44:19,929 INFO L499 BasicCegarLoop]: trace histogram [191, 190, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:44:19,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 09:44:20,142 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:44:20,143 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:44:20,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:44:20,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1829454644, now seen corresponding path program 7 times [2022-04-06 09:44:20,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:44:20,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046822329] [2022-04-06 09:44:20,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:44:20,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:44:20,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:31,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:44:31,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:31,694 INFO L134 CoverageAnalysis]: Checked inductivity of 36290 backedges. 0 proven. 36290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:44:31,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:44:31,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046822329] [2022-04-06 09:44:31,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046822329] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:44:31,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918913122] [2022-04-06 09:44:31,694 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-06 09:44:31,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:44:31,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:44:31,696 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) [2022-04-06 09:44:31,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 09:44:31,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:44:31,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 1577 conjuncts, 192 conjunts are in the unsatisfiable core [2022-04-06 09:44:31,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:44:54,868 INFO L134 CoverageAnalysis]: Checked inductivity of 36290 backedges. 36290 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:44:54,869 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 09:44:54,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918913122] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 09:44:54,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 09:44:54,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [193] imperfect sequences [196] total 387 [2022-04-06 09:44:54,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467755296] [2022-04-06 09:44:54,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 09:44:54,870 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2022-04-06 09:44:54,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:44:54,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2022-04-06 09:44:54,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37061, Invalid=112321, Unknown=0, NotChecked=0, Total=149382 [2022-04-06 09:44:54,881 INFO L87 Difference]: Start difference. First operand 683 states and 779 transitions. Second operand has 193 states, 193 states have (on average 2.0362694300518136) internal successors, (393), 193 states have internal predecessors, (393), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:44:57,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:44:57,680 INFO L93 Difference]: Finished difference Result 27957 states and 28147 transitions. [2022-04-06 09:44:57,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2022-04-06 09:44:57,680 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 2.0362694300518136) internal successors, (393), 193 states have internal predecessors, (393), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 397 [2022-04-06 09:44:57,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:44:57,685 INFO L225 Difference]: With dead ends: 27957 [2022-04-06 09:44:57,685 INFO L226 Difference]: Without dead ends: 1198 [2022-04-06 09:44:57,758 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 385 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36860 ImplicationChecksByTransitivity, 33.0s TimeCoverageRelationStatistics Valid=37061, Invalid=112321, Unknown=0, NotChecked=0, Total=149382 [2022-04-06 09:44:57,759 INFO L913 BasicCegarLoop]: 207 mSDtfsCounter, 576 mSDsluCounter, 1081 mSDsCounter, 0 mSdLazyCounter, 1114 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 1288 SdHoareTripleChecker+Invalid, 1205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 09:44:57,759 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [576 Valid, 1288 Invalid, 1205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1114 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 09:44:57,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1198 states. [2022-04-06 09:44:57,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1198 to 1190. [2022-04-06 09:44:57,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1190 states, 1185 states have (on average 1.0075949367088608) internal successors, (1194), 1185 states have internal predecessors, (1194), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:44:57,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 1198 transitions. [2022-04-06 09:44:57,777 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 1198 transitions. Word has length 397 [2022-04-06 09:44:57,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:44:57,777 INFO L478 AbstractCegarLoop]: Abstraction has 1190 states and 1198 transitions. [2022-04-06 09:44:57,778 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 2.0362694300518136) internal successors, (393), 193 states have internal predecessors, (393), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:44:57,778 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 1198 transitions. [2022-04-06 09:44:57,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2022-04-06 09:44:57,783 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 09:44:57,783 INFO L499 BasicCegarLoop]: trace histogram [100, 99, 92, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 09:44:57,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 09:44:58,000 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:44:58,000 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 09:44:58,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 09:44:58,001 INFO L85 PathProgramCache]: Analyzing trace with hash -856352636, now seen corresponding path program 1 times [2022-04-06 09:44:58,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 09:44:58,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561112568] [2022-04-06 09:44:58,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:44:58,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 09:44:58,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:09,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 09:45:09,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:09,428 INFO L134 CoverageAnalysis]: Checked inductivity of 18272 backedges. 0 proven. 18272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:45:09,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 09:45:09,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561112568] [2022-04-06 09:45:09,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561112568] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 09:45:09,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393028552] [2022-04-06 09:45:09,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 09:45:09,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 09:45:09,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 09:45:09,430 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) [2022-04-06 09:45:09,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 09:45:09,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 09:45:09,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 1395 conjuncts, 194 conjunts are in the unsatisfiable core [2022-04-06 09:45:09,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 09:45:10,482 INFO L134 CoverageAnalysis]: Checked inductivity of 18272 backedges. 0 proven. 18272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:45:10,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 09:45:12,376 INFO L134 CoverageAnalysis]: Checked inductivity of 18272 backedges. 0 proven. 18272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 09:45:12,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393028552] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 09:45:12,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 09:45:12,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [196, 195, 195] total 208 [2022-04-06 09:45:12,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194223605] [2022-04-06 09:45:12,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-06 09:45:12,377 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 208 states [2022-04-06 09:45:12,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 09:45:12,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 208 interpolants. [2022-04-06 09:45:12,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20515, Invalid=22541, Unknown=0, NotChecked=0, Total=43056 [2022-04-06 09:45:12,382 INFO L87 Difference]: Start difference. First operand 1190 states and 1198 transitions. Second operand has 208 states, 208 states have (on average 2.1153846153846154) internal successors, (440), 205 states have internal predecessors, (440), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:45:33,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 09:45:33,365 INFO L93 Difference]: Finished difference Result 2341 states and 2476 transitions. [2022-04-06 09:45:33,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 205 states. [2022-04-06 09:45:33,366 INFO L78 Accepts]: Start accepts. Automaton has has 208 states, 208 states have (on average 2.1153846153846154) internal successors, (440), 205 states have internal predecessors, (440), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 397 [2022-04-06 09:45:33,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 09:45:33,367 INFO L225 Difference]: With dead ends: 2341 [2022-04-06 09:45:33,367 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 09:45:33,378 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1192 GetRequests, 782 SyntacticMatches, 2 SemanticMatches, 408 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22518 ImplicationChecksByTransitivity, 26.1s TimeCoverageRelationStatistics Valid=61129, Invalid=106561, Unknown=0, NotChecked=0, Total=167690 [2022-04-06 09:45:33,379 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 2445 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 1526 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2445 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 2344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1526 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 09:45:33,380 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2445 Valid, 33 Invalid, 2344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1526 Valid, 818 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 09:45:33,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 09:45:33,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 09:45:33,380 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) [2022-04-06 09:45:33,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 09:45:33,380 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 397 [2022-04-06 09:45:33,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 09:45:33,381 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 09:45:33,381 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 208 states, 208 states have (on average 2.1153846153846154) internal successors, (440), 205 states have internal predecessors, (440), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 09:45:33,381 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 09:45:33,381 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 09:45:33,384 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 09:45:33,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 09:45:33,592 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-06 09:45:33,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-06 09:45:34,214 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-04-06 09:45:34,214 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-04-06 09:45:34,214 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-04-06 09:45:34,214 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-04-06 09:45:34,214 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-04-06 09:45:34,215 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-04-06 09:45:34,215 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-04-06 09:45:34,215 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 24 42) the Hoare annotation is: true [2022-04-06 09:45:34,215 INFO L882 garLoopResultBuilder]: For program point L26(lines 26 27) no Hoare annotation was computed. [2022-04-06 09:45:34,215 INFO L882 garLoopResultBuilder]: For program point L29-2(lines 28 31) no Hoare annotation was computed. [2022-04-06 09:45:34,215 INFO L882 garLoopResultBuilder]: For program point L29-3(lines 24 42) no Hoare annotation was computed. [2022-04-06 09:45:34,215 INFO L882 garLoopResultBuilder]: For program point L29(lines 29 31) no Hoare annotation was computed. [2022-04-06 09:45:34,215 INFO L885 garLoopResultBuilder]: At program point L39(lines 24 42) the Hoare annotation is: true [2022-04-06 09:45:34,215 INFO L882 garLoopResultBuilder]: For program point L35-2(lines 34 38) no Hoare annotation was computed. [2022-04-06 09:45:34,215 INFO L882 garLoopResultBuilder]: For program point L35-3(lines 24 42) no Hoare annotation was computed. [2022-04-06 09:45:34,215 INFO L882 garLoopResultBuilder]: For program point L35(lines 35 38) no Hoare annotation was computed. [2022-04-06 09:45:34,215 INFO L878 garLoopResultBuilder]: At program point L40(line 40) the Hoare annotation is: (< main_~i~0 200) [2022-04-06 09:45:34,215 INFO L882 garLoopResultBuilder]: For program point L40-1(line 40) no Hoare annotation was computed. [2022-04-06 09:45:34,215 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 24 42) no Hoare annotation was computed. [2022-04-06 09:45:34,215 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 24 42) no Hoare annotation was computed. [2022-04-06 09:45:34,215 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2022-04-06 09:45:34,215 INFO L882 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2022-04-06 09:45:34,215 INFO L882 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2022-04-06 09:45:34,216 INFO L882 garLoopResultBuilder]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2022-04-06 09:45:34,216 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2022-04-06 09:45:34,216 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2022-04-06 09:45:34,218 INFO L719 BasicCegarLoop]: Path program histogram: [7, 1, 1, 1] [2022-04-06 09:45:34,219 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 09:45:34,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 09:45:34 BasicIcfg [2022-04-06 09:45:34,226 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 09:45:34,226 INFO L158 Benchmark]: Toolchain (without parser) took 129081.01ms. Allocated memory was 200.3MB in the beginning and 897.6MB in the end (delta: 697.3MB). Free memory was 175.1MB in the beginning and 731.6MB in the end (delta: -556.5MB). Peak memory consumption was 598.6MB. Max. memory is 8.0GB. [2022-04-06 09:45:34,226 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 200.3MB. Free memory is still 161.0MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 09:45:34,227 INFO L158 Benchmark]: CACSL2BoogieTranslator took 230.80ms. Allocated memory was 200.3MB in the beginning and 336.6MB in the end (delta: 136.3MB). Free memory was 175.1MB in the beginning and 309.8MB in the end (delta: -134.6MB). Peak memory consumption was 9.9MB. Max. memory is 8.0GB. [2022-04-06 09:45:34,227 INFO L158 Benchmark]: Boogie Preprocessor took 22.12ms. Allocated memory is still 336.6MB. Free memory was 309.8MB in the beginning and 308.4MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 09:45:34,227 INFO L158 Benchmark]: RCFGBuilder took 207.53ms. Allocated memory is still 336.6MB. Free memory was 308.1MB in the beginning and 298.0MB in the end (delta: 10.2MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-04-06 09:45:34,227 INFO L158 Benchmark]: IcfgTransformer took 17.69ms. Allocated memory is still 336.6MB. Free memory was 297.6MB in the beginning and 296.6MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 09:45:34,227 INFO L158 Benchmark]: TraceAbstraction took 128595.90ms. Allocated memory was 336.6MB in the beginning and 897.6MB in the end (delta: 561.0MB). Free memory was 295.9MB in the beginning and 731.6MB in the end (delta: -435.7MB). Peak memory consumption was 584.5MB. Max. memory is 8.0GB. [2022-04-06 09:45:34,229 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 200.3MB. Free memory is still 161.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 230.80ms. Allocated memory was 200.3MB in the beginning and 336.6MB in the end (delta: 136.3MB). Free memory was 175.1MB in the beginning and 309.8MB in the end (delta: -134.6MB). Peak memory consumption was 9.9MB. Max. memory is 8.0GB. * Boogie Preprocessor took 22.12ms. Allocated memory is still 336.6MB. Free memory was 309.8MB in the beginning and 308.4MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 207.53ms. Allocated memory is still 336.6MB. Free memory was 308.1MB in the beginning and 298.0MB in the end (delta: 10.2MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * IcfgTransformer took 17.69ms. Allocated memory is still 336.6MB. Free memory was 297.6MB in the beginning and 296.6MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 128595.90ms. Allocated memory was 336.6MB in the beginning and 897.6MB in the end (delta: 561.0MB). Free memory was 295.9MB in the beginning and 731.6MB in the end (delta: -435.7MB). Peak memory consumption was 584.5MB. 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: 19]: 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 4 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 128.5s, OverallIterations: 10, TraceHistogramMax: 191, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 57.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 10329 SdHoareTripleChecker+Valid, 4.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 10328 mSDsluCounter, 1697 SdHoareTripleChecker+Invalid, 4.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1360 mSDsCounter, 4721 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4868 IncrementalHoareTripleChecker+Invalid, 9589 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4721 mSolverCounterUnsat, 337 mSDtfsCounter, 4868 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3302 GetRequests, 1713 SyntacticMatches, 8 SemanticMatches, 1581 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93085 ImplicationChecksByTransitivity, 90.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1190occurred in iteration=9, InterpolantAutomatonStates: 803, 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, 10 MinimizatonAttempts, 6516 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 207 PreInvPairs, 318 NumberOfFragments, 15 HoareAnnotationTreeSize, 207 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 7 FomulaSimplificationsInter, 481 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 66.4s InterpolantComputationTime, 2532 NumberOfCodeBlocks, 2532 NumberOfCodeBlocksAsserted, 170 NumberOfCheckSat, 3360 ConstructedInterpolants, 0 QuantifiedInterpolants, 9782 SizeOfPredicates, 7 NumberOfNonLiveVariables, 4730 ConjunctsInSsa, 587 ConjunctsInUnsatCore, 25 InterpolantComputations, 3 PerfectInterpolantSequences, 36290/162586 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 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2022-04-06 09:45:34,262 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...