/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/loops/sum03-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 19:20:49,292 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 19:20:49,302 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 19:20:49,338 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 19:20:49,339 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 19:20:49,339 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 19:20:49,340 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 19:20:49,347 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 19:20:49,349 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 19:20:49,352 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 19:20:49,352 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 19:20:49,353 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 19:20:49,354 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 19:20:49,355 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 19:20:49,356 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 19:20:49,357 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 19:20:49,358 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 19:20:49,358 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 19:20:49,361 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 19:20:49,364 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 19:20:49,366 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 19:20:49,367 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 19:20:49,367 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 19:20:49,368 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 19:20:49,369 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 19:20:49,373 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 19:20:49,378 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 19:20:49,379 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 19:20:49,380 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 19:20:49,380 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-17 19:20:49,400 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 19:20:49,400 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 19:20:49,401 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-17 19:20:49,401 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-17 19:20:49,402 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-17 19:20:49,402 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-17 19:20:49,402 INFO L138 SettingsManager]: * Use SBE=true [2022-03-17 19:20:49,403 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 19:20:49,403 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 19:20:49,403 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 19:20:49,403 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 19:20:49,403 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 19:20:49,404 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 19:20:49,404 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 19:20:49,404 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 19:20:49,404 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 19:20:49,404 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 19:20:49,404 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 19:20:49,404 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 19:20:49,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 19:20:49,404 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 19:20:49,404 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-17 19:20:49,405 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-17 19:20:49,405 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 19:20:49,405 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-17 19:20:49,405 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-17 19:20:49,405 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-17 19:20:49,405 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-17 19:20:49,406 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 19:20:49,406 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 19:20:49,587 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 19:20:49,602 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 19:20:49,603 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 19:20:49,604 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 19:20:49,605 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 19:20:49,606 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum03-1.i [2022-03-17 19:20:49,653 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abcb37405/c19dff71895f4bafaceb0dea8a7d5331/FLAG15d7f4283 [2022-03-17 19:20:50,075 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 19:20:50,076 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum03-1.i [2022-03-17 19:20:50,082 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abcb37405/c19dff71895f4bafaceb0dea8a7d5331/FLAG15d7f4283 [2022-03-17 19:20:50,102 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abcb37405/c19dff71895f4bafaceb0dea8a7d5331 [2022-03-17 19:20:50,104 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 19:20:50,106 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 19:20:50,109 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 19:20:50,109 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 19:20:50,113 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 19:20:50,114 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 07:20:50" (1/1) ... [2022-03-17 19:20:50,123 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a4110ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:20:50, skipping insertion in model container [2022-03-17 19:20:50,123 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 07:20:50" (1/1) ... [2022-03-17 19:20:50,130 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 19:20:50,143 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 19:20:50,323 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/sum03-1.i[807,820] [2022-03-17 19:20:50,340 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 19:20:50,347 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 19:20:50,356 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/sum03-1.i[807,820] [2022-03-17 19:20:50,359 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 19:20:50,370 INFO L208 MainTranslator]: Completed translation [2022-03-17 19:20:50,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:20:50 WrapperNode [2022-03-17 19:20:50,372 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 19:20:50,373 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 19:20:50,373 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 19:20:50,373 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 19:20:50,380 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:20:50" (1/1) ... [2022-03-17 19:20:50,380 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:20:50" (1/1) ... [2022-03-17 19:20:50,385 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:20:50" (1/1) ... [2022-03-17 19:20:50,386 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:20:50" (1/1) ... [2022-03-17 19:20:50,390 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:20:50" (1/1) ... [2022-03-17 19:20:50,394 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:20:50" (1/1) ... [2022-03-17 19:20:50,400 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:20:50" (1/1) ... [2022-03-17 19:20:50,404 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 19:20:50,405 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 19:20:50,405 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 19:20:50,405 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 19:20:50,405 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:20:50" (1/1) ... [2022-03-17 19:20:50,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 19:20:50,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:20:50,440 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-17 19:20:50,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-17 19:20:50,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 19:20:50,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 19:20:50,470 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 19:20:50,470 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 19:20:50,471 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 19:20:50,471 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 19:20:50,471 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 19:20:50,472 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-17 19:20:50,472 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-17 19:20:50,472 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 19:20:50,472 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 19:20:50,473 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 19:20:50,473 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-17 19:20:50,473 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 19:20:50,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 19:20:50,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 19:20:50,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 19:20:50,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 19:20:50,473 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 19:20:50,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 19:20:50,526 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 19:20:50,528 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 19:20:50,617 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 19:20:50,622 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 19:20:50,622 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-17 19:20:50,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 07:20:50 BoogieIcfgContainer [2022-03-17 19:20:50,624 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 19:20:50,624 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 19:20:50,624 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 19:20:50,625 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 19:20:50,627 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 07:20:50" (1/1) ... [2022-03-17 19:20:50,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 07:20:50 BasicIcfg [2022-03-17 19:20:50,638 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 19:20:50,639 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 19:20:50,639 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 19:20:50,641 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 19:20:50,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 07:20:50" (1/4) ... [2022-03-17 19:20:50,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f70768a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 07:20:50, skipping insertion in model container [2022-03-17 19:20:50,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:20:50" (2/4) ... [2022-03-17 19:20:50,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f70768a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 07:20:50, skipping insertion in model container [2022-03-17 19:20:50,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 07:20:50" (3/4) ... [2022-03-17 19:20:50,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f70768a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 07:20:50, skipping insertion in model container [2022-03-17 19:20:50,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 07:20:50" (4/4) ... [2022-03-17 19:20:50,643 INFO L111 eAbstractionObserver]: Analyzing ICFG sum03-1.iqvasr [2022-03-17 19:20:50,646 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-17 19:20:50,647 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 19:20:50,686 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 19:20:50,690 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 [2022-03-17 19:20:50,690 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 19:20:50,700 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-17 19:20:50,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-17 19:20:50,703 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:20:50,704 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:20:50,704 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:20:50,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:20:50,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1546198667, now seen corresponding path program 1 times [2022-03-17 19:20:50,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:20:50,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646187177] [2022-03-17 19:20:50,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:20:50,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:20:50,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:20:51,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:20:51,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:20:51,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:20:51,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:20:51,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646187177] [2022-03-17 19:20:51,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646187177] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 19:20:51,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 19:20:51,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-17 19:20:51,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702388885] [2022-03-17 19:20:51,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 19:20:51,126 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 19:20:51,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:20:51,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 19:20:51,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-03-17 19:20:51,148 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 14 states have internal predecessors, (17), 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 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:20:51,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:20:51,320 INFO L93 Difference]: Finished difference Result 41 states and 57 transitions. [2022-03-17 19:20:51,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-17 19:20:51,322 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 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 13 [2022-03-17 19:20:51,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:20:51,327 INFO L225 Difference]: With dead ends: 41 [2022-03-17 19:20:51,327 INFO L226 Difference]: Without dead ends: 27 [2022-03-17 19:20:51,329 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-17 19:20:51,331 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 25 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 19:20:51,332 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 33 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 19:20:51,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-17 19:20:51,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2022-03-17 19:20:51,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-17 19:20:51,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2022-03-17 19:20:51,356 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 13 [2022-03-17 19:20:51,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:20:51,356 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2022-03-17 19:20:51,356 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 19:20:51,357 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2022-03-17 19:20:51,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-17 19:20:51,357 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:20:51,357 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:20:51,357 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 19:20:51,358 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:20:51,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:20:51,358 INFO L85 PathProgramCache]: Analyzing trace with hash 35168483, now seen corresponding path program 1 times [2022-03-17 19:20:51,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:20:51,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407758693] [2022-03-17 19:20:51,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:20:51,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:20:51,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:20:51,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:20:51,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:20:51,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-17 19:20:51,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:20:51,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:20:51,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:20:51,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407758693] [2022-03-17 19:20:51,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407758693] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:20:51,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259881196] [2022-03-17 19:20:51,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:20:51,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:20:51,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:20:51,535 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:20:51,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 19:20:51,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:20:51,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-17 19:20:51,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:20:51,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:20:51,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:20:52,522 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 19:20:52,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259881196] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:20:52,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:20:52,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-03-17 19:20:52,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743152617] [2022-03-17 19:20:52,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:20:52,524 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-17 19:20:52,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:20:52,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-17 19:20:52,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-03-17 19:20:52,525 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 21 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 7 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-17 19:20:52,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:20:52,850 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2022-03-17 19:20:52,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-17 19:20:52,851 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 7 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 21 [2022-03-17 19:20:52,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:20:52,852 INFO L225 Difference]: With dead ends: 49 [2022-03-17 19:20:52,852 INFO L226 Difference]: Without dead ends: 39 [2022-03-17 19:20:52,853 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2022-03-17 19:20:52,854 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 34 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 19:20:52,854 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 71 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 19:20:52,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-17 19:20:52,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2022-03-17 19:20:52,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-17 19:20:52,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2022-03-17 19:20:52,862 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 21 [2022-03-17 19:20:52,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:20:52,862 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2022-03-17 19:20:52,863 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 7 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-17 19:20:52,863 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2022-03-17 19:20:52,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-17 19:20:52,864 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:20:52,864 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:20:52,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-17 19:20:53,079 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:20:53,080 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:20:53,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:20:53,080 INFO L85 PathProgramCache]: Analyzing trace with hash -407833038, now seen corresponding path program 1 times [2022-03-17 19:20:53,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:20:53,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527614977] [2022-03-17 19:20:53,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:20:53,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:20:53,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:20:53,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:20:53,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:20:53,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-17 19:20:53,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:20:53,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 19:20:53,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:20:53,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-17 19:20:53,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:20:53,164 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 19:20:53,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:20:53,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527614977] [2022-03-17 19:20:53,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527614977] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:20:53,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959897869] [2022-03-17 19:20:53,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:20:53,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:20:53,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:20:53,166 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:20:53,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 19:20:53,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:20:53,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-17 19:20:53,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:20:53,299 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 19:20:53,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:20:53,402 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 19:20:53,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959897869] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:20:53,403 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:20:53,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-03-17 19:20:53,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423386787] [2022-03-17 19:20:53,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:20:53,404 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-17 19:20:53,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:20:53,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-17 19:20:53,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-03-17 19:20:53,404 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-17 19:20:53,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:20:53,731 INFO L93 Difference]: Finished difference Result 69 states and 83 transitions. [2022-03-17 19:20:53,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-17 19:20:53,731 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 37 [2022-03-17 19:20:53,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:20:53,732 INFO L225 Difference]: With dead ends: 69 [2022-03-17 19:20:53,732 INFO L226 Difference]: Without dead ends: 59 [2022-03-17 19:20:53,733 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2022-03-17 19:20:53,734 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 37 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 19:20:53,734 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 41 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 19:20:53,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-03-17 19:20:53,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-03-17 19:20:53,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-17 19:20:53,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2022-03-17 19:20:53,747 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 37 [2022-03-17 19:20:53,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:20:53,747 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2022-03-17 19:20:53,747 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-17 19:20:53,748 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2022-03-17 19:20:53,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-17 19:20:53,749 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:20:53,749 INFO L500 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:20:53,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 19:20:53,967 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,SelfDestructingSolverStorable2 [2022-03-17 19:20:53,968 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:20:53,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:20:53,968 INFO L85 PathProgramCache]: Analyzing trace with hash 562981354, now seen corresponding path program 2 times [2022-03-17 19:20:53,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:20:53,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928671725] [2022-03-17 19:20:53,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:20:53,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:20:53,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:20:54,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 19:20:54,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:20:54,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-03-17 19:20:54,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:20:54,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 19:20:54,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:20:54,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-03-17 19:20:54,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:20:54,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-17 19:20:54,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:20:54,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-03-17 19:20:54,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:20:54,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-03-17 19:20:54,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:20:54,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-03-17 19:20:54,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:20:54,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-03-17 19:20:54,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 19:20:54,171 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 32 proven. 128 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-17 19:20:54,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 19:20:54,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928671725] [2022-03-17 19:20:54,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928671725] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 19:20:54,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750474776] [2022-03-17 19:20:54,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 19:20:54,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:20:54,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 19:20:54,174 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 19:20:54,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 19:20:54,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 19:20:54,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 19:20:54,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-17 19:20:54,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 19:20:54,470 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 32 proven. 128 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-17 19:20:54,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 19:20:54,700 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 32 proven. 128 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-17 19:20:54,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750474776] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 19:20:54,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 19:20:54,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2022-03-17 19:20:54,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468333699] [2022-03-17 19:20:54,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 19:20:54,702 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-17 19:20:54,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 19:20:54,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-17 19:20:54,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2022-03-17 19:20:54,704 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-17 19:20:55,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 19:20:55,096 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2022-03-17 19:20:55,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-17 19:20:55,097 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 77 [2022-03-17 19:20:55,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 19:20:55,098 INFO L225 Difference]: With dead ends: 77 [2022-03-17 19:20:55,098 INFO L226 Difference]: Without dead ends: 67 [2022-03-17 19:20:55,099 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=776, Unknown=0, NotChecked=0, Total=992 [2022-03-17 19:20:55,100 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 41 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-17 19:20:55,100 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 81 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-17 19:20:55,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-17 19:20:55,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2022-03-17 19:20:55,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 48 states have (on average 1.0625) internal successors, (51), 48 states have internal predecessors, (51), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-17 19:20:55,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2022-03-17 19:20:55,110 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 77 [2022-03-17 19:20:55,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 19:20:55,111 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2022-03-17 19:20:55,111 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 19 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-17 19:20:55,111 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2022-03-17 19:20:55,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-17 19:20:55,113 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 19:20:55,113 INFO L500 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 19:20:55,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-17 19:20:55,328 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 19:20:55,328 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 19:20:55,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 19:20:55,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1970006374, now seen corresponding path program 3 times [2022-03-17 19:20:55,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 19:20:55,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490517632] [2022-03-17 19:20:55,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 19:20:55,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 19:20:55,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-17 19:20:55,400 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-17 19:20:55,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-17 19:20:55,467 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-17 19:20:55,467 INFO L614 BasicCegarLoop]: Counterexample is feasible [2022-03-17 19:20:55,468 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-17 19:20:55,469 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-17 19:20:55,471 INFO L718 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2022-03-17 19:20:55,473 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-17 19:20:55,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 07:20:55 BasicIcfg [2022-03-17 19:20:55,514 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-17 19:20:55,516 INFO L158 Benchmark]: Toolchain (without parser) took 5408.79ms. Allocated memory was 197.1MB in the beginning and 275.8MB in the end (delta: 78.6MB). Free memory was 147.4MB in the beginning and 170.4MB in the end (delta: -23.0MB). Peak memory consumption was 56.2MB. Max. memory is 8.0GB. [2022-03-17 19:20:55,516 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 197.1MB. Free memory is still 163.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-17 19:20:55,519 INFO L158 Benchmark]: CACSL2BoogieTranslator took 263.16ms. Allocated memory is still 197.1MB. Free memory was 147.3MB in the beginning and 174.4MB in the end (delta: -27.1MB). Peak memory consumption was 10.8MB. Max. memory is 8.0GB. [2022-03-17 19:20:55,519 INFO L158 Benchmark]: Boogie Preprocessor took 30.90ms. Allocated memory is still 197.1MB. Free memory was 174.4MB in the beginning and 172.8MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-17 19:20:55,519 INFO L158 Benchmark]: RCFGBuilder took 219.18ms. Allocated memory is still 197.1MB. Free memory was 172.8MB in the beginning and 162.7MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-17 19:20:55,520 INFO L158 Benchmark]: IcfgTransformer took 13.64ms. Allocated memory is still 197.1MB. Free memory was 162.7MB in the beginning and 161.8MB in the end (delta: 918.0kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-17 19:20:55,520 INFO L158 Benchmark]: TraceAbstraction took 4875.31ms. Allocated memory was 197.1MB in the beginning and 275.8MB in the end (delta: 78.6MB). Free memory was 161.3MB in the beginning and 170.4MB in the end (delta: -9.1MB). Peak memory consumption was 70.5MB. Max. memory is 8.0GB. [2022-03-17 19:20:55,521 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 197.1MB. Free memory is still 163.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 263.16ms. Allocated memory is still 197.1MB. Free memory was 147.3MB in the beginning and 174.4MB in the end (delta: -27.1MB). Peak memory consumption was 10.8MB. Max. memory is 8.0GB. * Boogie Preprocessor took 30.90ms. Allocated memory is still 197.1MB. Free memory was 174.4MB in the beginning and 172.8MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 219.18ms. Allocated memory is still 197.1MB. Free memory was 172.8MB in the beginning and 162.7MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 13.64ms. Allocated memory is still 197.1MB. Free memory was 162.7MB in the beginning and 161.8MB in the end (delta: 918.0kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 4875.31ms. Allocated memory was 197.1MB in the beginning and 275.8MB in the end (delta: 78.6MB). Free memory was 161.3MB in the beginning and 170.4MB in the end (delta: -9.1MB). Peak memory consumption was 70.5MB. 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 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L21] int sn=0; [L22] unsigned int loop1=__VERIFIER_nondet_uint(), n1=__VERIFIER_nondet_uint(); [L22] unsigned int loop1=__VERIFIER_nondet_uint(), n1=__VERIFIER_nondet_uint(); [L23] unsigned int x=0; VAL [loop1=50, n1=51, sn=0, x=0] [L24] COND TRUE 1 VAL [loop1=50, n1=51, sn=0, x=0] [L25] COND TRUE x<10 [L26] sn = sn + (2) VAL [loop1=50, n1=51, sn=2, x=0] [L28] x++ VAL [loop1=50, n1=51, sn=2, x=1] [L29] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [\old(cond)=1] [L14] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L29] RET __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [loop1=50, n1=51, sn=2, x=1] [L24] COND TRUE 1 VAL [loop1=50, n1=51, sn=2, x=1] [L25] COND TRUE x<10 [L26] sn = sn + (2) VAL [loop1=50, n1=51, sn=4, x=1] [L28] x++ VAL [loop1=50, n1=51, sn=4, x=2] [L29] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [\old(cond)=1] [L14] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L29] RET __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [loop1=50, n1=51, sn=4, x=2] [L24] COND TRUE 1 VAL [loop1=50, n1=51, sn=4, x=2] [L25] COND TRUE x<10 [L26] sn = sn + (2) VAL [loop1=50, n1=51, sn=6, x=2] [L28] x++ VAL [loop1=50, n1=51, sn=6, x=3] [L29] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [\old(cond)=1] [L14] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L29] RET __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [loop1=50, n1=51, sn=6, x=3] [L24] COND TRUE 1 VAL [loop1=50, n1=51, sn=6, x=3] [L25] COND TRUE x<10 [L26] sn = sn + (2) VAL [loop1=50, n1=51, sn=8, x=3] [L28] x++ VAL [loop1=50, n1=51, sn=8, x=4] [L29] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [\old(cond)=1] [L14] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L29] RET __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [loop1=50, n1=51, sn=8, x=4] [L24] COND TRUE 1 VAL [loop1=50, n1=51, sn=8, x=4] [L25] COND TRUE x<10 [L26] sn = sn + (2) VAL [loop1=50, n1=51, sn=10, x=4] [L28] x++ VAL [loop1=50, n1=51, sn=10, x=5] [L29] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [\old(cond)=1] [L14] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L29] RET __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [loop1=50, n1=51, sn=10, x=5] [L24] COND TRUE 1 VAL [loop1=50, n1=51, sn=10, x=5] [L25] COND TRUE x<10 [L26] sn = sn + (2) VAL [loop1=50, n1=51, sn=12, x=5] [L28] x++ VAL [loop1=50, n1=51, sn=12, x=6] [L29] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [\old(cond)=1] [L14] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L29] RET __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [loop1=50, n1=51, sn=12, x=6] [L24] COND TRUE 1 VAL [loop1=50, n1=51, sn=12, x=6] [L25] COND TRUE x<10 [L26] sn = sn + (2) VAL [loop1=50, n1=51, sn=14, x=6] [L28] x++ VAL [loop1=50, n1=51, sn=14, x=7] [L29] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [\old(cond)=1] [L14] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L29] RET __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [loop1=50, n1=51, sn=14, x=7] [L24] COND TRUE 1 VAL [loop1=50, n1=51, sn=14, x=7] [L25] COND TRUE x<10 [L26] sn = sn + (2) VAL [loop1=50, n1=51, sn=16, x=7] [L28] x++ VAL [loop1=50, n1=51, sn=16, x=8] [L29] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [\old(cond)=1] [L14] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L29] RET __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [loop1=50, n1=51, sn=16, x=8] [L24] COND TRUE 1 VAL [loop1=50, n1=51, sn=16, x=8] [L25] COND TRUE x<10 [L26] sn = sn + (2) VAL [loop1=50, n1=51, sn=18, x=8] [L28] x++ VAL [loop1=50, n1=51, sn=18, x=9] [L29] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [\old(cond)=1] [L14] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L29] RET __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [loop1=50, n1=51, sn=18, x=9] [L24] COND TRUE 1 VAL [loop1=50, n1=51, sn=18, x=9] [L25] COND TRUE x<10 [L26] sn = sn + (2) VAL [loop1=50, n1=51, sn=20, x=9] [L28] x++ VAL [loop1=50, n1=51, sn=20, x=10] [L29] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [\old(cond)=1] [L14] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L29] RET __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [loop1=50, n1=51, sn=20, x=10] [L24] COND TRUE 1 VAL [loop1=50, n1=51, sn=20, x=10] [L25] COND FALSE !(x<10) VAL [loop1=50, n1=51, sn=20, x=10] [L28] x++ VAL [loop1=50, n1=51, sn=20, x=11] [L29] CALL __VERIFIER_assert(sn==x*(2) || sn == 0) VAL [\old(cond)=0] [L14] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L15] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4.8s, OverallIterations: 5, TraceHistogramMax: 11, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 141 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 137 mSDsluCounter, 226 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 153 mSDsCounter, 128 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 931 IncrementalHoareTripleChecker+Invalid, 1059 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 128 mSolverCounterUnsat, 73 mSDtfsCounter, 931 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 368 GetRequests, 274 SyntacticMatches, 5 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=66occurred in iteration=4, InterpolantAutomatonStates: 46, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 6 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 376 NumberOfCodeBlocks, 376 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 408 ConstructedInterpolants, 0 QuantifiedInterpolants, 1670 SizeOfPredicates, 6 NumberOfNonLiveVariables, 350 ConjunctsInSsa, 52 ConjunctsInUnsatCore, 10 InterpolantComputations, 1 PerfectInterpolantSequences, 510/960 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 RESULT: Ultimate proved your program to be incorrect! [2022-03-17 19:20:55,533 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...