/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loop-zilu/benchmark26_linear.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-14 21:42:00,566 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-14 21:42:00,567 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-14 21:42:00,606 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-14 21:42:00,628 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-14 21:42:00,628 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-14 21:42:00,629 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-14 21:42:00,630 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-14 21:42:00,630 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-14 21:42:00,631 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-14 21:42:00,632 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-14 21:42:00,633 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-14 21:42:00,633 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-14 21:42:00,636 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-14 21:42:00,639 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-14 21:42:00,640 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-14 21:42:00,642 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-14 21:42:00,646 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-14 21:42:00,647 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-14 21:42:00,647 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-14 21:42:00,649 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-14 21:42:00,655 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-14 21:42:00,655 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-14 21:42:00,656 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-14 21:42:00,656 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-14 21:42:00,656 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-14 21:42:00,656 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-14 21:42:00,656 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-14 21:42:00,656 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-14 21:42:00,656 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-14 21:42:00,656 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-14 21:42:00,656 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-14 21:42:00,656 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-14 21:42:00,657 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-14 21:42:00,657 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-14 21:42:00,657 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-14 21:42:00,657 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-14 21:42:00,657 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-14 21:42:00,657 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-14 21:42:00,657 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 21:42:00,657 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-14 21:42:00,657 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-14 21:42:00,658 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-14 21:42:00,658 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-14 21:42:00,814 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-14 21:42:00,837 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-14 21:42:00,839 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-14 21:42:00,839 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-14 21:42:00,843 INFO L275 PluginConnector]: CDTParser initialized [2022-02-14 21:42:00,844 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-zilu/benchmark26_linear.i [2022-02-14 21:42:00,890 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ff618cce/139416f505cb425c88f2fe97d3cf9a25/FLAG76dfc7118 [2022-02-14 21:42:01,232 INFO L306 CDTParser]: Found 1 translation units. [2022-02-14 21:42:01,232 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-zilu/benchmark26_linear.i [2022-02-14 21:42:01,236 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ff618cce/139416f505cb425c88f2fe97d3cf9a25/FLAG76dfc7118 [2022-02-14 21:42:01,677 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ff618cce/139416f505cb425c88f2fe97d3cf9a25 [2022-02-14 21:42:01,679 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-14 21:42:01,680 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-14 21:42:01,681 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-14 21:42:01,681 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-14 21:42:01,684 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-14 21:42:01,685 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 09:42:01" (1/1) ... [2022-02-14 21:42:01,686 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1457fc38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:42:01, skipping insertion in model container [2022-02-14 21:42:01,686 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 09:42:01" (1/1) ... [2022-02-14 21:42:01,690 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-14 21:42:01,699 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-14 21:42:01,820 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-zilu/benchmark26_linear.i[868,881] [2022-02-14 21:42:01,831 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 21:42:01,835 INFO L203 MainTranslator]: Completed pre-run [2022-02-14 21:42:01,843 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-zilu/benchmark26_linear.i[868,881] [2022-02-14 21:42:01,844 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 21:42:01,852 INFO L208 MainTranslator]: Completed translation [2022-02-14 21:42:01,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:42:01 WrapperNode [2022-02-14 21:42:01,853 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-14 21:42:01,853 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-14 21:42:01,853 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-14 21:42:01,854 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-14 21:42:01,860 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:42:01" (1/1) ... [2022-02-14 21:42:01,860 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:42:01" (1/1) ... [2022-02-14 21:42:01,864 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:42:01" (1/1) ... [2022-02-14 21:42:01,864 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:42:01" (1/1) ... [2022-02-14 21:42:01,866 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:42:01" (1/1) ... [2022-02-14 21:42:01,868 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:42:01" (1/1) ... [2022-02-14 21:42:01,869 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:42:01" (1/1) ... [2022-02-14 21:42:01,869 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-14 21:42:01,870 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-14 21:42:01,870 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-14 21:42:01,870 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-14 21:42:01,871 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:42:01" (1/1) ... [2022-02-14 21:42:01,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 21:42:01,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:42:01,897 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) [2022-02-14 21:42:01,904 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 [2022-02-14 21:42:01,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-14 21:42:01,923 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-14 21:42:01,923 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-14 21:42:01,923 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-14 21:42:01,923 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-14 21:42:01,923 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-14 21:42:01,923 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-14 21:42:01,923 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-14 21:42:01,923 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-14 21:42:01,923 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-14 21:42:01,923 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-14 21:42:01,923 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2022-02-14 21:42:01,923 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-14 21:42:01,924 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-14 21:42:01,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-14 21:42:01,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-14 21:42:01,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-14 21:42:01,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-14 21:42:01,924 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-14 21:42:01,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-14 21:42:01,977 INFO L234 CfgBuilder]: Building ICFG [2022-02-14 21:42:01,978 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-14 21:42:02,049 INFO L275 CfgBuilder]: Performing block encoding [2022-02-14 21:42:02,052 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-14 21:42:02,052 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-14 21:42:02,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 09:42:02 BoogieIcfgContainer [2022-02-14 21:42:02,054 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-14 21:42:02,054 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-14 21:42:02,054 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-14 21:42:02,055 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-14 21:42:02,057 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 09:42:02" (1/1) ... [2022-02-14 21:42:02,143 INFO L89 elerationTransformer]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-14 21:42:02,144 INFO L91 elerationTransformer]: Accelerated Formula: (and (= (+ v_main_~x~0_3 1) v_main_~x~0_2) (< v_main_~x~0_3 v_main_~y~0_2)) InVars {main_~x~0=v_main_~x~0_3, main_~y~0=v_main_~y~0_2} OutVars{main_~x~0=v_main_~x~0_2, main_~y~0=v_main_~y~0_2} AuxVars[] AssignedVars[main_~x~0] to Formula: (or (and (< v_main_~x~0_2 (+ v_main_~y~0_2 1)) (< v_main_~x~0_3 v_main_~x~0_2)) (and (= v_main_~x~0_3 v_main_~x~0_2) (not (< v_main_~x~0_3 v_main_~y~0_2)))) InVars {main_~x~0=v_main_~x~0_3, main_~y~0=v_main_~y~0_2} OutVars{main_~x~0=v_main_~x~0_2, main_~y~0=v_main_~y~0_2} AuxVars[] AssignedVars[main_~x~0] [2022-02-14 21:42:02,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 09:42:02 BasicIcfg [2022-02-14 21:42:02,147 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-14 21:42:02,148 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-14 21:42:02,149 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-14 21:42:02,153 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-14 21:42:02,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 09:42:01" (1/4) ... [2022-02-14 21:42:02,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@702ecf6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 09:42:02, skipping insertion in model container [2022-02-14 21:42:02,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:42:01" (2/4) ... [2022-02-14 21:42:02,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@702ecf6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 09:42:02, skipping insertion in model container [2022-02-14 21:42:02,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 09:42:02" (3/4) ... [2022-02-14 21:42:02,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@702ecf6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 09:42:02, skipping insertion in model container [2022-02-14 21:42:02,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 09:42:02" (4/4) ... [2022-02-14 21:42:02,155 INFO L111 eAbstractionObserver]: Analyzing ICFG benchmark26_linear.iJordan [2022-02-14 21:42:02,158 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-14 21:42:02,158 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-14 21:42:02,203 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-14 21:42:02,209 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-14 21:42:02,217 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-14 21:42:02,226 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-14 21:42:02,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-14 21:42:02,232 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:42:02,233 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:42:02,233 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:42:02,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:42:02,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1809217115, now seen corresponding path program 1 times [2022-02-14 21:42:02,242 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:42:02,243 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401603133] [2022-02-14 21:42:02,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:42:02,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:42:02,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:02,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:42:02,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:02,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 21:42:02,385 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:42:02,386 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401603133] [2022-02-14 21:42:02,386 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401603133] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 21:42:02,386 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 21:42:02,386 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-14 21:42:02,388 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068601140] [2022-02-14 21:42:02,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 21:42:02,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-14 21:42:02,392 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:42:02,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-14 21:42:02,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 21:42:02,417 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2022-02-14 21:42:02,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:42:02,445 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2022-02-14 21:42:02,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-14 21:42:02,447 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 12 [2022-02-14 21:42:02,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:42:02,462 INFO L225 Difference]: With dead ends: 20 [2022-02-14 21:42:02,462 INFO L226 Difference]: Without dead ends: 13 [2022-02-14 21:42:02,463 INFO L932 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 [2022-02-14 21:42:02,465 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 21:42:02,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 23 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 21:42:02,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-02-14 21:42:02,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-02-14 21:42:02,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 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) [2022-02-14 21:42:02,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2022-02-14 21:42:02,487 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 12 [2022-02-14 21:42:02,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:42:02,487 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2022-02-14 21:42:02,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2022-02-14 21:42:02,487 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2022-02-14 21:42:02,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-14 21:42:02,488 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:42:02,488 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:42:02,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-14 21:42:02,488 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:42:02,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:42:02,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1810140636, now seen corresponding path program 1 times [2022-02-14 21:42:02,492 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:42:02,492 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457972099] [2022-02-14 21:42:02,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:42:02,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:42:02,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:02,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:42:02,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:02,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 21:42:02,548 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:42:02,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457972099] [2022-02-14 21:42:02,549 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457972099] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 21:42:02,549 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 21:42:02,549 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-14 21:42:02,549 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361526153] [2022-02-14 21:42:02,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 21:42:02,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-14 21:42:02,550 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:42:02,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-14 21:42:02,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-14 21:42:02,551 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-02-14 21:42:02,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:42:02,581 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2022-02-14 21:42:02,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-14 21:42:02,582 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 12 [2022-02-14 21:42:02,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:42:02,582 INFO L225 Difference]: With dead ends: 14 [2022-02-14 21:42:02,583 INFO L226 Difference]: Without dead ends: 14 [2022-02-14 21:42:02,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-14 21:42:02,584 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 21:42:02,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 19 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 21:42:02,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-02-14 21:42:02,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-02-14 21:42:02,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 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) [2022-02-14 21:42:02,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-02-14 21:42:02,590 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2022-02-14 21:42:02,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:42:02,595 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-02-14 21:42:02,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-02-14 21:42:02,598 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-02-14 21:42:02,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-14 21:42:02,601 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:42:02,601 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:42:02,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-14 21:42:02,602 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:42:02,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:42:02,602 INFO L85 PathProgramCache]: Analyzing trace with hash 306506437, now seen corresponding path program 1 times [2022-02-14 21:42:02,602 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:42:02,602 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534655468] [2022-02-14 21:42:02,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:42:02,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:42:02,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:02,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:42:02,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:02,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 21:42:02,712 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:42:02,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534655468] [2022-02-14 21:42:02,713 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534655468] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:42:02,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982447213] [2022-02-14 21:42:02,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:42:02,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:42:02,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:42:02,717 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) [2022-02-14 21:42:02,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-14 21:42:02,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:42:02,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-14 21:42:02,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:42:02,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 21:42:02,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:42:02,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-14 21:42:02,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982447213] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-14 21:42:02,942 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-02-14 21:42:02,942 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 7] total 10 [2022-02-14 21:42:02,942 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556149363] [2022-02-14 21:42:02,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 21:42:02,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-14 21:42:02,942 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:42:02,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-14 21:42:02,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-02-14 21:42:02,943 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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) [2022-02-14 21:42:02,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:42:02,965 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2022-02-14 21:42:02,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-14 21:42:02,965 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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 13 [2022-02-14 21:42:02,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:42:02,966 INFO L225 Difference]: With dead ends: 12 [2022-02-14 21:42:02,966 INFO L226 Difference]: Without dead ends: 0 [2022-02-14 21:42:02,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-02-14 21:42:02,967 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 2 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 21:42:02,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 35 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 21:42:02,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-14 21:42:02,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-14 21:42:02,968 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) [2022-02-14 21:42:02,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-14 21:42:02,968 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2022-02-14 21:42:02,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:42:02,968 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-14 21:42:02,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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) [2022-02-14 21:42:02,969 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-14 21:42:02,969 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-14 21:42:02,970 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-14 21:42:02,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-14 21:42:03,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:42:03,173 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-02-14 21:42:03,174 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-14 21:42:03,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 09:42:03 BasicIcfg [2022-02-14 21:42:03,176 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-14 21:42:03,177 INFO L158 Benchmark]: Toolchain (without parser) took 1497.06ms. Allocated memory was 186.6MB in the beginning and 249.6MB in the end (delta: 62.9MB). Free memory was 131.5MB in the beginning and 154.6MB in the end (delta: -23.1MB). Peak memory consumption was 39.6MB. Max. memory is 8.0GB. [2022-02-14 21:42:03,177 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 186.6MB. Free memory is still 147.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-14 21:42:03,178 INFO L158 Benchmark]: CACSL2BoogieTranslator took 172.24ms. Allocated memory was 186.6MB in the beginning and 249.6MB in the end (delta: 62.9MB). Free memory was 131.3MB in the beginning and 221.2MB in the end (delta: -89.9MB). Peak memory consumption was 10.3MB. Max. memory is 8.0GB. [2022-02-14 21:42:03,178 INFO L158 Benchmark]: Boogie Preprocessor took 16.16ms. Allocated memory is still 249.6MB. Free memory was 221.2MB in the beginning and 219.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-14 21:42:03,178 INFO L158 Benchmark]: RCFGBuilder took 183.52ms. Allocated memory is still 249.6MB. Free memory was 219.6MB in the beginning and 208.6MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-02-14 21:42:03,178 INFO L158 Benchmark]: IcfgTransformer took 93.37ms. Allocated memory is still 249.6MB. Free memory was 208.6MB in the beginning and 202.3MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 8.0GB. [2022-02-14 21:42:03,179 INFO L158 Benchmark]: TraceAbstraction took 1027.97ms. Allocated memory is still 249.6MB. Free memory was 201.8MB in the beginning and 154.6MB in the end (delta: 47.2MB). Peak memory consumption was 47.2MB. Max. memory is 8.0GB. [2022-02-14 21:42:03,180 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from IcfgTransformer: - StatisticsResult: Jordan loop acceleration statistics 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 186.6MB. Free memory is still 147.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 172.24ms. Allocated memory was 186.6MB in the beginning and 249.6MB in the end (delta: 62.9MB). Free memory was 131.3MB in the beginning and 221.2MB in the end (delta: -89.9MB). Peak memory consumption was 10.3MB. Max. memory is 8.0GB. * Boogie Preprocessor took 16.16ms. Allocated memory is still 249.6MB. Free memory was 221.2MB in the beginning and 219.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 183.52ms. Allocated memory is still 249.6MB. Free memory was 219.6MB in the beginning and 208.6MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 93.37ms. Allocated memory is still 249.6MB. Free memory was 208.6MB in the beginning and 202.3MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 8.0GB. * TraceAbstraction took 1027.97ms. Allocated memory is still 249.6MB. Free memory was 201.8MB in the beginning and 154.6MB in the end (delta: 47.2MB). Peak memory consumption was 47.2MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.0s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 22 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 21 mSDsluCounter, 77 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 37 mSDsCounter, 5 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 25 IncrementalHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5 mSolverCounterUnsat, 40 mSDtfsCounter, 25 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, InterpolantAutomatonStates: 13, 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 50 NumberOfCodeBlocks, 50 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 58 ConstructedInterpolants, 0 QuantifiedInterpolants, 124 SizeOfPredicates, 1 NumberOfNonLiveVariables, 55 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 1/3 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-02-14 21:42:03,219 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...