/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-crafted-1/in-de51.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 08:47:29,908 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 08:47:29,910 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 08:47:29,930 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 08:47:29,944 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 08:47:29,945 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 08:47:29,946 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 08:47:29,947 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 08:47:29,947 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 08:47:29,948 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 08:47:29,949 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 08:47:29,950 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 08:47:29,952 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 08:47:29,955 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 08:47:29,956 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 08:47:29,956 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 08:47:29,957 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 08:47:29,958 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 08:47:29,963 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 08:47:29,963 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 08:47:29,966 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 08:47:29,966 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-20 08:47:29,999 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 08:47:29,999 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 08:47:30,000 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 08:47:30,000 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 08:47:30,000 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 08:47:30,000 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 08:47:30,000 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 08:47:30,000 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 08:47:30,001 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 08:47:30,001 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 08:47:30,001 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 08:47:30,001 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 08:47:30,001 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 08:47:30,001 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 08:47:30,001 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 08:47:30,001 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 08:47:30,001 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 08:47:30,001 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 08:47:30,001 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 08:47:30,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 08:47:30,002 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 08:47:30,002 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 08:47:30,002 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 08:47:30,002 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 08:47:30,002 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 08:47:30,002 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 08:47:30,002 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-20 08:47:30,002 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-20 08:47:30,003 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 08:47:30,003 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 08:47:30,171 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 08:47:30,192 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 08:47:30,193 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 08:47:30,194 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 08:47:30,194 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 08:47:30,196 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de51.c [2022-03-20 08:47:30,236 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d3e1a300/64db7f6fc1a549e2938ce3adf58fdb21/FLAGa0ab23563 [2022-03-20 08:47:30,555 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 08:47:30,555 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de51.c [2022-03-20 08:47:30,558 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d3e1a300/64db7f6fc1a549e2938ce3adf58fdb21/FLAGa0ab23563 [2022-03-20 08:47:30,568 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d3e1a300/64db7f6fc1a549e2938ce3adf58fdb21 [2022-03-20 08:47:30,569 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 08:47:30,570 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 08:47:30,580 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 08:47:30,580 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 08:47:30,585 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 08:47:30,585 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:47:30" (1/1) ... [2022-03-20 08:47:30,586 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9fa3ea4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:47:30, skipping insertion in model container [2022-03-20 08:47:30,586 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:47:30" (1/1) ... [2022-03-20 08:47:30,603 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 08:47:30,617 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 08:47:30,737 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-crafted-1/in-de51.c[368,381] [2022-03-20 08:47:30,755 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 08:47:30,761 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 08:47:30,769 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-crafted-1/in-de51.c[368,381] [2022-03-20 08:47:30,776 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 08:47:30,786 INFO L208 MainTranslator]: Completed translation [2022-03-20 08:47:30,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:47:30 WrapperNode [2022-03-20 08:47:30,788 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 08:47:30,790 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 08:47:30,790 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 08:47:30,790 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 08:47:30,798 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:47:30" (1/1) ... [2022-03-20 08:47:30,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:47:30" (1/1) ... [2022-03-20 08:47:30,803 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:47:30" (1/1) ... [2022-03-20 08:47:30,803 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:47:30" (1/1) ... [2022-03-20 08:47:30,812 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:47:30" (1/1) ... [2022-03-20 08:47:30,817 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:47:30" (1/1) ... [2022-03-20 08:47:30,820 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:47:30" (1/1) ... [2022-03-20 08:47:30,823 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 08:47:30,824 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 08:47:30,824 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 08:47:30,824 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 08:47:30,825 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:47:30" (1/1) ... [2022-03-20 08:47:30,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 08:47:30,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:47:30,855 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 08:47:30,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 08:47:30,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 08:47:30,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 08:47:30,901 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 08:47:30,901 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 08:47:30,902 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 08:47:30,902 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 08:47:30,902 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 08:47:30,902 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 08:47:30,903 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 08:47:30,903 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-20 08:47:30,903 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 08:47:30,903 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 08:47:30,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 08:47:30,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 08:47:30,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 08:47:30,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 08:47:30,904 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 08:47:30,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 08:47:30,959 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 08:47:30,960 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 08:47:31,038 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 08:47:31,042 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 08:47:31,042 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-03-20 08:47:31,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:47:31 BoogieIcfgContainer [2022-03-20 08:47:31,044 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 08:47:31,044 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 08:47:31,044 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 08:47:31,056 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 08:47:31,058 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:47:31" (1/1) ... [2022-03-20 08:47:31,059 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-03-20 08:47:32,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 08:47:32 BasicIcfg [2022-03-20 08:47:32,290 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 08:47:32,291 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 08:47:32,291 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 08:47:32,295 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 08:47:32,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 08:47:30" (1/4) ... [2022-03-20 08:47:32,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a38b6e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:47:32, skipping insertion in model container [2022-03-20 08:47:32,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:47:30" (2/4) ... [2022-03-20 08:47:32,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a38b6e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:47:32, skipping insertion in model container [2022-03-20 08:47:32,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:47:31" (3/4) ... [2022-03-20 08:47:32,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a38b6e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 08:47:32, skipping insertion in model container [2022-03-20 08:47:32,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 08:47:32" (4/4) ... [2022-03-20 08:47:32,300 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de51.cqvasr [2022-03-20 08:47:32,304 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 08:47:32,304 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 08:47:32,333 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 08:47:32,338 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 [2022-03-20 08:47:32,338 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 08:47:32,349 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 08:47:32,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-20 08:47:32,351 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:47:32,352 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:47:32,352 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:47:32,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:47:32,359 INFO L85 PathProgramCache]: Analyzing trace with hash 702671213, now seen corresponding path program 1 times [2022-03-20 08:47:32,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:47:32,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403508295] [2022-03-20 08:47:32,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:47:32,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:47:32,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:47:32,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:47:32,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:47:32,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:47:32,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:47:32,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403508295] [2022-03-20 08:47:32,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403508295] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:47:32,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:47:32,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 08:47:32,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210112714] [2022-03-20 08:47:32,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:47:32,451 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 08:47:32,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:47:32,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 08:47:32,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 08:47:32,484 INFO L87 Difference]: Start difference. First operand has 24 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:47:32,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:47:32,515 INFO L93 Difference]: Finished difference Result 41 states and 60 transitions. [2022-03-20 08:47:32,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 08:47:32,517 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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 16 [2022-03-20 08:47:32,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:47:32,520 INFO L225 Difference]: With dead ends: 41 [2022-03-20 08:47:32,520 INFO L226 Difference]: Without dead ends: 17 [2022-03-20 08:47:32,522 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 08:47:32,524 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:47:32,525 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 25 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:47:32,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-20 08:47:32,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-03-20 08:47:32,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 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) [2022-03-20 08:47:32,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-03-20 08:47:32,543 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 16 [2022-03-20 08:47:32,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:47:32,544 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-03-20 08:47:32,544 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:47:32,544 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-03-20 08:47:32,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-20 08:47:32,545 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:47:32,545 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:47:32,545 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 08:47:32,546 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:47:32,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:47:32,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1128942900, now seen corresponding path program 1 times [2022-03-20 08:47:32,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:47:32,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235967341] [2022-03-20 08:47:32,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:47:32,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:47:32,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:47:32,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:47:32,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:47:32,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:47:32,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:47:32,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235967341] [2022-03-20 08:47:32,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235967341] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:47:32,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:47:32,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 08:47:32,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639046483] [2022-03-20 08:47:32,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:47:32,664 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 08:47:32,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:47:32,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 08:47:32,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 08:47:32,665 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:47:32,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:47:32,725 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2022-03-20 08:47:32,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 08:47:32,725 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 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 16 [2022-03-20 08:47:32,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:47:32,726 INFO L225 Difference]: With dead ends: 28 [2022-03-20 08:47:32,726 INFO L226 Difference]: Without dead ends: 23 [2022-03-20 08:47:32,726 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-20 08:47:32,727 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 25 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:47:32,727 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 30 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:47:32,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-20 08:47:32,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-03-20 08:47:32,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 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) [2022-03-20 08:47:32,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2022-03-20 08:47:32,731 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 16 [2022-03-20 08:47:32,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:47:32,731 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2022-03-20 08:47:32,731 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:47:32,731 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2022-03-20 08:47:32,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 08:47:32,732 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:47:32,732 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:47:32,732 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 08:47:32,732 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:47:32,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:47:32,733 INFO L85 PathProgramCache]: Analyzing trace with hash -610770875, now seen corresponding path program 1 times [2022-03-20 08:47:32,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:47:32,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864505568] [2022-03-20 08:47:32,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:47:32,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:47:32,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:47:32,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:47:32,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:47:32,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:47:32,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:47:32,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864505568] [2022-03-20 08:47:32,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864505568] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:47:32,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153412897] [2022-03-20 08:47:32,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:47:32,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:47:32,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:47:32,938 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:47:32,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 08:47:32,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:47:32,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 08:47:32,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:47:33,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:47:33,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:47:33,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:47:33,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153412897] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:47:33,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:47:33,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-03-20 08:47:33,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789251005] [2022-03-20 08:47:33,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:47:33,652 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 08:47:33,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:47:33,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 08:47:33,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-03-20 08:47:33,654 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand has 18 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 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) [2022-03-20 08:47:35,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:47:35,039 INFO L93 Difference]: Finished difference Result 48 states and 70 transitions. [2022-03-20 08:47:35,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 08:47:35,039 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 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 17 [2022-03-20 08:47:35,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:47:35,041 INFO L225 Difference]: With dead ends: 48 [2022-03-20 08:47:35,041 INFO L226 Difference]: Without dead ends: 32 [2022-03-20 08:47:35,042 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=258, Invalid=932, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 08:47:35,042 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 105 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 08:47:35,043 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 37 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 08:47:35,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-20 08:47:35,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 18. [2022-03-20 08:47:35,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 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) [2022-03-20 08:47:35,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2022-03-20 08:47:35,048 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 17 [2022-03-20 08:47:35,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:47:35,048 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2022-03-20 08:47:35,048 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 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) [2022-03-20 08:47:35,048 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2022-03-20 08:47:35,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 08:47:35,048 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:47:35,049 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:47:35,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 08:47:35,260 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:47:35,261 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:47:35,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:47:35,261 INFO L85 PathProgramCache]: Analyzing trace with hash 162216202, now seen corresponding path program 1 times [2022-03-20 08:47:35,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:47:35,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513193505] [2022-03-20 08:47:35,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:47:35,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:47:35,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:47:35,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:47:35,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:47:35,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:47:35,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:47:35,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513193505] [2022-03-20 08:47:35,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513193505] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:47:35,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814228701] [2022-03-20 08:47:35,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:47:35,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:47:35,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:47:35,362 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:47:35,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 08:47:35,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:47:35,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 08:47:35,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:47:35,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 08:47:35,481 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 08:47:35,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814228701] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:47:35,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 08:47:35,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 13 [2022-03-20 08:47:35,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537474829] [2022-03-20 08:47:35,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:47:35,482 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 08:47:35,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:47:35,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 08:47:35,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-03-20 08:47:35,483 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 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) [2022-03-20 08:47:35,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:47:35,523 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2022-03-20 08:47:35,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 08:47:35,523 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 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 17 [2022-03-20 08:47:35,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:47:35,525 INFO L225 Difference]: With dead ends: 35 [2022-03-20 08:47:35,525 INFO L226 Difference]: Without dead ends: 30 [2022-03-20 08:47:35,525 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-20 08:47:35,527 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 16 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:47:35,528 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 78 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:47:35,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-20 08:47:35,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2022-03-20 08:47:35,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 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) [2022-03-20 08:47:35,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2022-03-20 08:47:35,537 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 17 [2022-03-20 08:47:35,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:47:35,538 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2022-03-20 08:47:35,538 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 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) [2022-03-20 08:47:35,538 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2022-03-20 08:47:35,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-20 08:47:35,539 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:47:35,539 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:47:35,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 08:47:35,747 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-20 08:47:35,747 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:47:35,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:47:35,748 INFO L85 PathProgramCache]: Analyzing trace with hash 760455623, now seen corresponding path program 1 times [2022-03-20 08:47:35,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:47:35,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261230463] [2022-03-20 08:47:35,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:47:35,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:47:35,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:47:35,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:47:35,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:47:36,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:47:36,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:47:36,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261230463] [2022-03-20 08:47:36,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261230463] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:47:36,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724563607] [2022-03-20 08:47:36,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:47:36,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:47:36,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:47:36,008 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 08:47:36,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 08:47:36,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:47:36,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 08:47:36,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:47:36,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:47:36,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:47:39,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:47:39,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724563607] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:47:39,963 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:47:39,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 24 [2022-03-20 08:47:39,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713188275] [2022-03-20 08:47:39,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:47:39,963 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 08:47:39,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:47:39,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 08:47:39,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2022-03-20 08:47:39,964 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand has 24 states, 22 states have (on average 1.5) internal successors, (33), 21 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) [2022-03-20 08:47:48,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:47:48,183 INFO L93 Difference]: Finished difference Result 60 states and 85 transitions. [2022-03-20 08:47:48,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-20 08:47:48,184 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.5) internal successors, (33), 21 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 18 [2022-03-20 08:47:48,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:47:48,184 INFO L225 Difference]: With dead ends: 60 [2022-03-20 08:47:48,184 INFO L226 Difference]: Without dead ends: 27 [2022-03-20 08:47:48,186 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=498, Invalid=2154, Unknown=0, NotChecked=0, Total=2652 [2022-03-20 08:47:48,186 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 110 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-20 08:47:48,187 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 56 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-20 08:47:48,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-20 08:47:48,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2022-03-20 08:47:48,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 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) [2022-03-20 08:47:48,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2022-03-20 08:47:48,193 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 18 [2022-03-20 08:47:48,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:47:48,193 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2022-03-20 08:47:48,194 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.5) internal successors, (33), 21 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) [2022-03-20 08:47:48,194 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2022-03-20 08:47:48,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-20 08:47:48,194 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:47:48,194 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:47:48,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 08:47:48,400 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 [2022-03-20 08:47:48,400 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:47:48,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:47:48,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1618157770, now seen corresponding path program 1 times [2022-03-20 08:47:48,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:47:48,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683576057] [2022-03-20 08:47:48,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:47:48,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:47:48,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:47:48,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:47:48,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:47:48,567 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:47:48,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:47:48,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683576057] [2022-03-20 08:47:48,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683576057] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:47:48,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389847902] [2022-03-20 08:47:48,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:47:48,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:47:48,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:47:48,568 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) [2022-03-20 08:47:48,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 08:47:48,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:47:48,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 08:47:48,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:47:48,792 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 08:47:48,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:47:48,971 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 08:47:48,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389847902] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:47:48,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:47:48,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 20 [2022-03-20 08:47:48,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582579366] [2022-03-20 08:47:48,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:47:48,972 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 08:47:48,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:47:48,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 08:47:48,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-03-20 08:47:48,973 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 17 states have internal predecessors, (35), 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) [2022-03-20 08:47:49,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:47:49,262 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2022-03-20 08:47:49,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 08:47:49,263 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 17 states have internal predecessors, (35), 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 [2022-03-20 08:47:49,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:47:49,263 INFO L225 Difference]: With dead ends: 39 [2022-03-20 08:47:49,263 INFO L226 Difference]: Without dead ends: 33 [2022-03-20 08:47:49,264 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2022-03-20 08:47:49,264 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 54 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 08:47:49,264 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 47 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 188 Invalid, 0 Unknown, 6 Unchecked, 0.1s Time] [2022-03-20 08:47:49,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-20 08:47:49,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 23. [2022-03-20 08:47:49,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 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) [2022-03-20 08:47:49,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2022-03-20 08:47:49,269 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 19 [2022-03-20 08:47:49,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:47:49,270 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2022-03-20 08:47:49,270 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 17 states have internal predecessors, (35), 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) [2022-03-20 08:47:49,270 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2022-03-20 08:47:49,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-20 08:47:49,270 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:47:49,270 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:47:49,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 08:47:49,470 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 [2022-03-20 08:47:49,471 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:47:49,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:47:49,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1349996025, now seen corresponding path program 1 times [2022-03-20 08:47:49,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:47:49,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626848187] [2022-03-20 08:47:49,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:47:49,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:47:49,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:47:49,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:47:49,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:47:49,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:47:49,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:47:49,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626848187] [2022-03-20 08:47:49,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626848187] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:47:49,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621513142] [2022-03-20 08:47:49,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:47:49,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:47:49,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:47:49,784 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) [2022-03-20 08:47:49,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 08:47:49,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:47:49,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 08:47:49,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:47:54,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 08:47:54,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:47:55,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 08:47:55,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621513142] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:47:55,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:47:55,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 13] total 30 [2022-03-20 08:47:55,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921727096] [2022-03-20 08:47:55,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:47:55,250 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-20 08:47:55,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:47:55,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-20 08:47:55,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=717, Unknown=2, NotChecked=0, Total=870 [2022-03-20 08:47:55,251 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 30 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 27 states have internal predecessors, (40), 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) [2022-03-20 08:47:56,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:47:56,186 INFO L93 Difference]: Finished difference Result 33 states and 44 transitions. [2022-03-20 08:47:56,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 08:47:56,186 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 27 states have internal predecessors, (40), 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 20 [2022-03-20 08:47:56,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:47:56,186 INFO L225 Difference]: With dead ends: 33 [2022-03-20 08:47:56,186 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 08:47:56,187 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=420, Invalid=1648, Unknown=2, NotChecked=0, Total=2070 [2022-03-20 08:47:56,187 INFO L913 BasicCegarLoop]: 8 mSDtfsCounter, 41 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 08:47:56,188 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 70 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 196 Invalid, 0 Unknown, 19 Unchecked, 0.3s Time] [2022-03-20 08:47:56,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 08:47:56,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 08:47:56,188 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) [2022-03-20 08:47:56,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 08:47:56,188 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2022-03-20 08:47:56,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:47:56,188 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 08:47:56,188 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 27 states have internal predecessors, (40), 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) [2022-03-20 08:47:56,188 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 08:47:56,189 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 08:47:56,190 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 08:47:56,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 08:47:56,406 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 [2022-03-20 08:47:56,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-20 08:47:59,251 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|)) [2022-03-20 08:47:59,251 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-20 08:47:59,251 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-20 08:47:59,251 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-20 08:47:59,251 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-20 08:47:59,251 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-20 08:47:59,251 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-20 08:47:59,251 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 12 49) the Hoare annotation is: true [2022-03-20 08:47:59,252 INFO L878 garLoopResultBuilder]: At program point L16-2(lines 16 20) the Hoare annotation is: (or (and (<= (+ (div main_~y~0 4294967296) (div (+ main_~x~0 1) 4294967296)) (div main_~n~0 4294967296)) (= main_~n~0 (+ main_~y~0 main_~x~0))) (and (= main_~n~0 main_~x~0) (= main_~y~0 0))) [2022-03-20 08:47:59,252 INFO L882 garLoopResultBuilder]: For program point L16-3(lines 16 20) no Hoare annotation was computed. [2022-03-20 08:47:59,252 INFO L878 garLoopResultBuilder]: At program point L23-2(lines 23 27) the Hoare annotation is: (let ((.cse4 (div main_~n~0 4294967296)) (.cse2 (* (- 1) main_~z~0)) (.cse3 (* (- 1) main_~x~0))) (let ((.cse0 (<= (+ .cse4 (div (+ main_~n~0 .cse2 .cse3) (- 4294967296))) (+ (div (+ main_~z~0 main_~x~0 (- 4294967296)) 4294967296) 1))) (.cse1 (< (div (+ (- 1) .cse2 .cse3) (- 4294967296)) (+ (div (+ main_~z~0 main_~x~0 (* (- 1) main_~n~0)) 4294967296) .cse4 2)))) (or (and (<= main_~n~0 (+ main_~y~0 (* 4294967296 (div main_~x~0 4294967296)))) .cse0 .cse1 (= main_~n~0 (+ main_~y~0 main_~x~0))) (and (not (< 0 (mod (+ main_~n~0 (* main_~y~0 4294967295)) 4294967296))) (<= (* (div (+ main_~z~0 1) 4294967296) 4294967296) main_~z~0) .cse0 .cse1)))) [2022-03-20 08:47:59,252 INFO L882 garLoopResultBuilder]: For program point L29-1(lines 13 49) no Hoare annotation was computed. [2022-03-20 08:47:59,252 INFO L882 garLoopResultBuilder]: For program point L35-1(lines 13 49) no Hoare annotation was computed. [2022-03-20 08:47:59,252 INFO L882 garLoopResultBuilder]: For program point L41-1(lines 13 49) no Hoare annotation was computed. [2022-03-20 08:47:59,252 INFO L878 garLoopResultBuilder]: At program point L41-2(lines 41 45) the Hoare annotation is: (or (= main_~n~0 main_~x~0) (and (not (< 0 (mod main_~x~0 4294967296))) (not (< 0 (mod main_~n~0 4294967296)))) (let ((.cse2 (div main_~n~0 4294967296))) (let ((.cse1 (+ main_~n~0 (* 4294967296 (div main_~x~0 4294967296)))) (.cse0 (* .cse2 4294967296)) (.cse3 (* (- 1) main_~z~0)) (.cse4 (* (- 1) main_~x~0))) (and (<= (+ main_~x~0 .cse0) .cse1) (<= (+ .cse2 (div (+ main_~n~0 .cse3 .cse4) (- 4294967296))) (+ (div (+ main_~z~0 main_~x~0 (- 4294967296)) 4294967296) 1)) (< .cse1 (+ main_~x~0 .cse0 1)) (< (div (+ (- 1) .cse3 .cse4) (- 4294967296)) (+ (div (+ main_~z~0 main_~x~0 (* (- 1) main_~n~0)) 4294967296) .cse2 2)))))) [2022-03-20 08:47:59,252 INFO L882 garLoopResultBuilder]: For program point L47(line 47) no Hoare annotation was computed. [2022-03-20 08:47:59,252 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 12 49) no Hoare annotation was computed. [2022-03-20 08:47:59,252 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 12 49) no Hoare annotation was computed. [2022-03-20 08:47:59,252 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2022-03-20 08:47:59,252 INFO L882 garLoopResultBuilder]: For program point L6(lines 6 8) no Hoare annotation was computed. [2022-03-20 08:47:59,252 INFO L882 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2022-03-20 08:47:59,252 INFO L882 garLoopResultBuilder]: For program point L6-2(lines 5 10) no Hoare annotation was computed. [2022-03-20 08:47:59,253 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2022-03-20 08:47:59,253 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 5 10) no Hoare annotation was computed. [2022-03-20 08:47:59,255 INFO L719 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:47:59,255 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 08:47:59,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 08:47:59 BasicIcfg [2022-03-20 08:47:59,265 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 08:47:59,266 INFO L158 Benchmark]: Toolchain (without parser) took 28695.69ms. Allocated memory was 198.2MB in the beginning and 265.3MB in the end (delta: 67.1MB). Free memory was 143.6MB in the beginning and 175.9MB in the end (delta: -32.3MB). Peak memory consumption was 122.0MB. Max. memory is 8.0GB. [2022-03-20 08:47:59,266 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 198.2MB. Free memory is still 159.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 08:47:59,266 INFO L158 Benchmark]: CACSL2BoogieTranslator took 208.54ms. Allocated memory was 198.2MB in the beginning and 265.3MB in the end (delta: 67.1MB). Free memory was 143.4MB in the beginning and 240.1MB in the end (delta: -96.7MB). Peak memory consumption was 5.9MB. Max. memory is 8.0GB. [2022-03-20 08:47:59,266 INFO L158 Benchmark]: Boogie Preprocessor took 33.36ms. Allocated memory is still 265.3MB. Free memory was 240.1MB in the beginning and 238.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 08:47:59,267 INFO L158 Benchmark]: RCFGBuilder took 219.61ms. Allocated memory is still 265.3MB. Free memory was 238.6MB in the beginning and 227.0MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-20 08:47:59,267 INFO L158 Benchmark]: IcfgTransformer took 1245.96ms. Allocated memory is still 265.3MB. Free memory was 227.0MB in the beginning and 185.6MB in the end (delta: 41.4MB). Peak memory consumption was 40.9MB. Max. memory is 8.0GB. [2022-03-20 08:47:59,267 INFO L158 Benchmark]: TraceAbstraction took 26974.24ms. Allocated memory is still 265.3MB. Free memory was 185.1MB in the beginning and 175.9MB in the end (delta: 9.2MB). Peak memory consumption was 96.8MB. Max. memory is 8.0GB. [2022-03-20 08:47:59,268 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 198.2MB. Free memory is still 159.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 208.54ms. Allocated memory was 198.2MB in the beginning and 265.3MB in the end (delta: 67.1MB). Free memory was 143.4MB in the beginning and 240.1MB in the end (delta: -96.7MB). Peak memory consumption was 5.9MB. Max. memory is 8.0GB. * Boogie Preprocessor took 33.36ms. Allocated memory is still 265.3MB. Free memory was 240.1MB in the beginning and 238.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 219.61ms. Allocated memory is still 265.3MB. Free memory was 238.6MB in the beginning and 227.0MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 1245.96ms. Allocated memory is still 265.3MB. Free memory was 227.0MB in the beginning and 185.6MB in the end (delta: 41.4MB). Peak memory consumption was 40.9MB. Max. memory is 8.0GB. * TraceAbstraction took 26974.24ms. Allocated memory is still 265.3MB. Free memory was 185.1MB in the beginning and 175.9MB in the end (delta: 9.2MB). Peak memory consumption was 96.8MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 7]: 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, 24 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 26.9s, OverallIterations: 7, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 11.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.8s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 371 SdHoareTripleChecker+Valid, 3.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 370 mSDsluCounter, 343 SdHoareTripleChecker+Invalid, 3.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 25 IncrementalHoareTripleChecker+Unchecked, 260 mSDsCounter, 346 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 853 IncrementalHoareTripleChecker+Invalid, 1224 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 346 mSolverCounterUnsat, 91 mSDtfsCounter, 853 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 321 GetRequests, 122 SyntacticMatches, 22 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1863 ImplicationChecksByTransitivity, 13.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=4, InterpolantAutomatonStates: 102, 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, 7 MinimizatonAttempts, 34 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 23 PreInvPairs, 45 NumberOfFragments, 264 HoareAnnotationTreeSize, 23 FomulaSimplifications, 123 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 5114 FormulaSimplificationTreeSizeReductionInter, 2.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 11.5s InterpolantComputationTime, 214 NumberOfCodeBlocks, 214 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 272 ConstructedInterpolants, 4 QuantifiedInterpolants, 3198 SizeOfPredicates, 19 NumberOfNonLiveVariables, 393 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 16 InterpolantComputations, 3 PerfectInterpolantSequences, 11/32 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: 16]: Loop Invariant Derived loop invariant: (y / 4294967296 + (x + 1) / 4294967296 <= n / 4294967296 && n == y + x) || (n == x && y == 0) - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: (((n <= y + 4294967296 * (x / 4294967296) && n / 4294967296 + (n + -1 * z + -1 * x) / -4294967296 <= (z + x + -4294967296) / 4294967296 + 1) && (-1 + -1 * z + -1 * x) / -4294967296 < (z + x + -1 * n) / 4294967296 + n / 4294967296 + 2) && n == y + x) || (((!(0 < (n + y * 4294967295) % 4294967296) && (z + 1) / 4294967296 * 4294967296 <= z) && n / 4294967296 + (n + -1 * z + -1 * x) / -4294967296 <= (z + x + -4294967296) / 4294967296 + 1) && (-1 + -1 * z + -1 * x) / -4294967296 < (z + x + -1 * n) / 4294967296 + n / 4294967296 + 2) RESULT: Ultimate proved your program to be correct! [2022-03-20 08:47:59,403 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...