./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/locks/test_locks_12.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/locks/test_locks_12.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fbb7e06bf350f46f725ea0ddc5d1215829061b3a ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-25 20:13:56,788 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-25 20:13:56,791 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-25 20:13:56,839 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-25 20:13:56,840 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-25 20:13:56,843 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-25 20:13:56,845 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-25 20:13:56,850 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-25 20:13:56,852 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-25 20:13:56,856 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-25 20:13:56,857 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-25 20:13:56,861 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-25 20:13:56,861 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-25 20:13:56,863 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-25 20:13:56,865 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-25 20:13:56,866 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-25 20:13:56,866 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-25 20:13:56,867 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-25 20:13:56,868 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-25 20:13:56,869 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-25 20:13:56,871 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-25 20:13:56,871 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-25 20:13:56,872 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-25 20:13:56,873 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-25 20:13:56,875 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-25 20:13:56,875 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-25 20:13:56,876 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-25 20:13:56,876 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-25 20:13:56,877 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-25 20:13:56,877 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-25 20:13:56,878 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-25 20:13:56,878 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-25 20:13:56,879 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-25 20:13:56,880 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-25 20:13:56,880 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-25 20:13:56,881 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-25 20:13:56,881 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-25 20:13:56,881 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-25 20:13:56,882 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-25 20:13:56,882 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-25 20:13:56,883 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-25 20:13:56,884 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-25 20:13:56,905 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-25 20:13:56,905 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-25 20:13:56,905 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-25 20:13:56,905 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-25 20:13:56,906 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-25 20:13:56,907 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-25 20:13:56,907 INFO L138 SettingsManager]: * Use SBE=true [2021-08-25 20:13:56,907 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-25 20:13:56,907 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-25 20:13:56,907 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-25 20:13:56,908 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-25 20:13:56,908 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-25 20:13:56,908 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-25 20:13:56,908 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-25 20:13:56,908 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-25 20:13:56,909 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-25 20:13:56,909 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-25 20:13:56,909 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-25 20:13:56,909 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-25 20:13:56,909 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-25 20:13:56,910 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-25 20:13:56,910 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-25 20:13:56,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 20:13:56,910 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-25 20:13:56,910 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-25 20:13:56,911 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-25 20:13:56,911 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-25 20:13:56,911 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-25 20:13:56,911 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-25 20:13:56,911 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-25 20:13:56,911 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fbb7e06bf350f46f725ea0ddc5d1215829061b3a [2021-08-25 20:13:57,228 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-25 20:13:57,261 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-25 20:13:57,264 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-25 20:13:57,266 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-25 20:13:57,266 INFO L275 PluginConnector]: CDTParser initialized [2021-08-25 20:13:57,267 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/locks/test_locks_12.c [2021-08-25 20:13:57,317 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f43730d9/3880fa28775844aab75884f2f9516270/FLAG8f0a5f6b4 [2021-08-25 20:13:57,806 INFO L306 CDTParser]: Found 1 translation units. [2021-08-25 20:13:57,808 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/locks/test_locks_12.c [2021-08-25 20:13:57,817 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f43730d9/3880fa28775844aab75884f2f9516270/FLAG8f0a5f6b4 [2021-08-25 20:13:57,838 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f43730d9/3880fa28775844aab75884f2f9516270 [2021-08-25 20:13:57,840 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-25 20:13:57,842 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-25 20:13:57,845 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-25 20:13:57,845 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-25 20:13:57,848 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-25 20:13:57,849 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 08:13:57" (1/1) ... [2021-08-25 20:13:57,851 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7712945c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:13:57, skipping insertion in model container [2021-08-25 20:13:57,851 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 08:13:57" (1/1) ... [2021-08-25 20:13:57,857 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-25 20:13:57,884 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-25 20:13:58,045 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/locks/test_locks_12.c[4591,4604] [2021-08-25 20:13:58,054 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 20:13:58,062 INFO L203 MainTranslator]: Completed pre-run [2021-08-25 20:13:58,097 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/locks/test_locks_12.c[4591,4604] [2021-08-25 20:13:58,105 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 20:13:58,143 INFO L208 MainTranslator]: Completed translation [2021-08-25 20:13:58,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:13:58 WrapperNode [2021-08-25 20:13:58,159 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-25 20:13:58,160 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-25 20:13:58,160 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-25 20:13:58,160 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-25 20:13:58,166 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:13:58" (1/1) ... [2021-08-25 20:13:58,171 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:13:58" (1/1) ... [2021-08-25 20:13:58,189 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-25 20:13:58,190 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-25 20:13:58,190 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-25 20:13:58,190 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-25 20:13:58,196 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:13:58" (1/1) ... [2021-08-25 20:13:58,196 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:13:58" (1/1) ... [2021-08-25 20:13:58,198 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:13:58" (1/1) ... [2021-08-25 20:13:58,198 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:13:58" (1/1) ... [2021-08-25 20:13:58,202 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:13:58" (1/1) ... [2021-08-25 20:13:58,206 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:13:58" (1/1) ... [2021-08-25 20:13:58,207 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:13:58" (1/1) ... [2021-08-25 20:13:58,208 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-25 20:13:58,209 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-25 20:13:58,209 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-25 20:13:58,210 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-25 20:13:58,210 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:13:58" (1/1) ... [2021-08-25 20:13:58,216 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 20:13:58,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 20:13:58,238 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) [2021-08-25 20:13:58,263 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 [2021-08-25 20:13:58,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-25 20:13:58,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-25 20:13:58,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-25 20:13:58,284 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-25 20:13:58,783 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-25 20:13:58,783 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-08-25 20:13:58,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 08:13:58 BoogieIcfgContainer [2021-08-25 20:13:58,785 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-25 20:13:58,787 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-25 20:13:58,787 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-25 20:13:58,789 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-25 20:13:58,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.08 08:13:57" (1/3) ... [2021-08-25 20:13:58,790 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fedbf3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 08:13:58, skipping insertion in model container [2021-08-25 20:13:58,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:13:58" (2/3) ... [2021-08-25 20:13:58,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fedbf3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 08:13:58, skipping insertion in model container [2021-08-25 20:13:58,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 08:13:58" (3/3) ... [2021-08-25 20:13:58,792 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_12.c [2021-08-25 20:13:58,796 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-25 20:13:58,796 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-25 20:13:58,834 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-25 20:13:58,840 INFO L339 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, mConcurrency=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, mLoopAccelerationTechnique=FAST_UPR [2021-08-25 20:13:58,840 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-25 20:13:58,856 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 44 states have (on average 1.9090909090909092) internal successors, (84), 45 states have internal predecessors, (84), 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) [2021-08-25 20:13:58,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-25 20:13:58,861 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:13:58,862 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:13:58,862 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:13:58,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:13:58,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1341605783, now seen corresponding path program 1 times [2021-08-25 20:13:58,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:13:58,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957128103] [2021-08-25 20:13:58,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:13:58,881 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:13:58,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:13:59,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:13:59,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:13:59,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957128103] [2021-08-25 20:13:59,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957128103] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:13:59,086 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:13:59,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:13:59,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685668434] [2021-08-25 20:13:59,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:13:59,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:13:59,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:13:59,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:59,104 INFO L87 Difference]: Start difference. First operand has 46 states, 44 states have (on average 1.9090909090909092) internal successors, (84), 45 states have internal predecessors, (84), 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) Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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) [2021-08-25 20:13:59,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:13:59,137 INFO L93 Difference]: Finished difference Result 95 states and 169 transitions. [2021-08-25 20:13:59,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:13:59,139 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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) Word has length 19 [2021-08-25 20:13:59,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:13:59,147 INFO L225 Difference]: With dead ends: 95 [2021-08-25 20:13:59,147 INFO L226 Difference]: Without dead ends: 81 [2021-08-25 20:13:59,149 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:59,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-08-25 20:13:59,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 55. [2021-08-25 20:13:59,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.8888888888888888) internal successors, (102), 54 states have internal predecessors, (102), 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) [2021-08-25 20:13:59,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 102 transitions. [2021-08-25 20:13:59,180 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 102 transitions. Word has length 19 [2021-08-25 20:13:59,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:13:59,180 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 102 transitions. [2021-08-25 20:13:59,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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) [2021-08-25 20:13:59,181 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 102 transitions. [2021-08-25 20:13:59,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-25 20:13:59,182 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:13:59,182 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:13:59,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-25 20:13:59,182 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:13:59,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:13:59,183 INFO L82 PathProgramCache]: Analyzing trace with hash 61742105, now seen corresponding path program 1 times [2021-08-25 20:13:59,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:13:59,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737942888] [2021-08-25 20:13:59,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:13:59,184 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:13:59,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:13:59,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:13:59,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:13:59,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737942888] [2021-08-25 20:13:59,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737942888] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:13:59,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:13:59,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:13:59,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647366245] [2021-08-25 20:13:59,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:13:59,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:13:59,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:13:59,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:59,264 INFO L87 Difference]: Start difference. First operand 55 states and 102 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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) [2021-08-25 20:13:59,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:13:59,289 INFO L93 Difference]: Finished difference Result 134 states and 249 transitions. [2021-08-25 20:13:59,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:13:59,290 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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) Word has length 19 [2021-08-25 20:13:59,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:13:59,291 INFO L225 Difference]: With dead ends: 134 [2021-08-25 20:13:59,291 INFO L226 Difference]: Without dead ends: 81 [2021-08-25 20:13:59,293 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:59,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-08-25 20:13:59,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2021-08-25 20:13:59,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.8717948717948718) internal successors, (146), 78 states have internal predecessors, (146), 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) [2021-08-25 20:13:59,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 146 transitions. [2021-08-25 20:13:59,304 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 146 transitions. Word has length 19 [2021-08-25 20:13:59,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:13:59,305 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 146 transitions. [2021-08-25 20:13:59,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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) [2021-08-25 20:13:59,305 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 146 transitions. [2021-08-25 20:13:59,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-25 20:13:59,306 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:13:59,306 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:13:59,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-25 20:13:59,306 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:13:59,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:13:59,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1359680987, now seen corresponding path program 1 times [2021-08-25 20:13:59,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:13:59,307 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203911314] [2021-08-25 20:13:59,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:13:59,308 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:13:59,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:13:59,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:13:59,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:13:59,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203911314] [2021-08-25 20:13:59,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203911314] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:13:59,371 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:13:59,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:13:59,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246370695] [2021-08-25 20:13:59,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:13:59,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:13:59,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:13:59,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:59,373 INFO L87 Difference]: Start difference. First operand 79 states and 146 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) [2021-08-25 20:13:59,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:13:59,397 INFO L93 Difference]: Finished difference Result 123 states and 222 transitions. [2021-08-25 20:13:59,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:13:59,398 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) Word has length 20 [2021-08-25 20:13:59,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:13:59,400 INFO L225 Difference]: With dead ends: 123 [2021-08-25 20:13:59,402 INFO L226 Difference]: Without dead ends: 84 [2021-08-25 20:13:59,403 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:59,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-08-25 20:13:59,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2021-08-25 20:13:59,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.8271604938271604) internal successors, (148), 81 states have internal predecessors, (148), 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) [2021-08-25 20:13:59,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 148 transitions. [2021-08-25 20:13:59,412 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 148 transitions. Word has length 20 [2021-08-25 20:13:59,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:13:59,412 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 148 transitions. [2021-08-25 20:13:59,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) [2021-08-25 20:13:59,412 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 148 transitions. [2021-08-25 20:13:59,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-25 20:13:59,413 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:13:59,413 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:13:59,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-25 20:13:59,414 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:13:59,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:13:59,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1914217955, now seen corresponding path program 1 times [2021-08-25 20:13:59,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:13:59,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625964371] [2021-08-25 20:13:59,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:13:59,415 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:13:59,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:13:59,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:13:59,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:13:59,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625964371] [2021-08-25 20:13:59,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625964371] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:13:59,470 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:13:59,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:13:59,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854752195] [2021-08-25 20:13:59,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:13:59,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:13:59,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:13:59,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:59,472 INFO L87 Difference]: Start difference. First operand 82 states and 148 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) [2021-08-25 20:13:59,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:13:59,493 INFO L93 Difference]: Finished difference Result 157 states and 285 transitions. [2021-08-25 20:13:59,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:13:59,493 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) Word has length 20 [2021-08-25 20:13:59,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:13:59,498 INFO L225 Difference]: With dead ends: 157 [2021-08-25 20:13:59,499 INFO L226 Difference]: Without dead ends: 155 [2021-08-25 20:13:59,499 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:59,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-08-25 20:13:59,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 109. [2021-08-25 20:13:59,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.8240740740740742) internal successors, (197), 108 states have internal predecessors, (197), 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) [2021-08-25 20:13:59,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 197 transitions. [2021-08-25 20:13:59,511 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 197 transitions. Word has length 20 [2021-08-25 20:13:59,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:13:59,511 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 197 transitions. [2021-08-25 20:13:59,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) [2021-08-25 20:13:59,512 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 197 transitions. [2021-08-25 20:13:59,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-25 20:13:59,513 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:13:59,513 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:13:59,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-25 20:13:59,513 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:13:59,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:13:59,514 INFO L82 PathProgramCache]: Analyzing trace with hash 634354277, now seen corresponding path program 1 times [2021-08-25 20:13:59,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:13:59,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314018420] [2021-08-25 20:13:59,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:13:59,516 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:13:59,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:13:59,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:13:59,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:13:59,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314018420] [2021-08-25 20:13:59,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314018420] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:13:59,567 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:13:59,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:13:59,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218790094] [2021-08-25 20:13:59,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:13:59,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:13:59,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:13:59,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:59,569 INFO L87 Difference]: Start difference. First operand 109 states and 197 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) [2021-08-25 20:13:59,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:13:59,595 INFO L93 Difference]: Finished difference Result 261 states and 475 transitions. [2021-08-25 20:13:59,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:13:59,596 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) Word has length 20 [2021-08-25 20:13:59,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:13:59,597 INFO L225 Difference]: With dead ends: 261 [2021-08-25 20:13:59,597 INFO L226 Difference]: Without dead ends: 157 [2021-08-25 20:13:59,598 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:59,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-08-25 20:13:59,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 155. [2021-08-25 20:13:59,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.8116883116883118) internal successors, (279), 154 states have internal predecessors, (279), 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) [2021-08-25 20:13:59,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 279 transitions. [2021-08-25 20:13:59,607 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 279 transitions. Word has length 20 [2021-08-25 20:13:59,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:13:59,608 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 279 transitions. [2021-08-25 20:13:59,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) [2021-08-25 20:13:59,608 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 279 transitions. [2021-08-25 20:13:59,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-25 20:13:59,609 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:13:59,609 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:13:59,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-25 20:13:59,610 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:13:59,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:13:59,611 INFO L82 PathProgramCache]: Analyzing trace with hash -788572498, now seen corresponding path program 1 times [2021-08-25 20:13:59,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:13:59,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324521703] [2021-08-25 20:13:59,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:13:59,616 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:13:59,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:13:59,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:13:59,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:13:59,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324521703] [2021-08-25 20:13:59,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324521703] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:13:59,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:13:59,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:13:59,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498312109] [2021-08-25 20:13:59,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:13:59,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:13:59,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:13:59,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:59,659 INFO L87 Difference]: Start difference. First operand 155 states and 279 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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) [2021-08-25 20:13:59,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:13:59,680 INFO L93 Difference]: Finished difference Result 234 states and 418 transitions. [2021-08-25 20:13:59,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:13:59,681 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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) Word has length 21 [2021-08-25 20:13:59,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:13:59,682 INFO L225 Difference]: With dead ends: 234 [2021-08-25 20:13:59,683 INFO L226 Difference]: Without dead ends: 159 [2021-08-25 20:13:59,686 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:59,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-08-25 20:13:59,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 157. [2021-08-25 20:13:59,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.7884615384615385) internal successors, (279), 156 states have internal predecessors, (279), 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) [2021-08-25 20:13:59,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 279 transitions. [2021-08-25 20:13:59,706 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 279 transitions. Word has length 21 [2021-08-25 20:13:59,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:13:59,706 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 279 transitions. [2021-08-25 20:13:59,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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) [2021-08-25 20:13:59,706 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 279 transitions. [2021-08-25 20:13:59,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-25 20:13:59,707 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:13:59,707 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:13:59,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-25 20:13:59,707 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:13:59,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:13:59,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1809640852, now seen corresponding path program 1 times [2021-08-25 20:13:59,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:13:59,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876971857] [2021-08-25 20:13:59,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:13:59,708 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:13:59,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:13:59,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:13:59,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:13:59,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876971857] [2021-08-25 20:13:59,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876971857] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:13:59,762 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:13:59,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:13:59,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878849322] [2021-08-25 20:13:59,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:13:59,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:13:59,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:13:59,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:59,765 INFO L87 Difference]: Start difference. First operand 157 states and 279 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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) [2021-08-25 20:13:59,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:13:59,791 INFO L93 Difference]: Finished difference Result 453 states and 809 transitions. [2021-08-25 20:13:59,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:13:59,792 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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) Word has length 21 [2021-08-25 20:13:59,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:13:59,793 INFO L225 Difference]: With dead ends: 453 [2021-08-25 20:13:59,794 INFO L226 Difference]: Without dead ends: 303 [2021-08-25 20:13:59,797 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:59,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-08-25 20:13:59,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 301. [2021-08-25 20:13:59,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 1.77) internal successors, (531), 300 states have internal predecessors, (531), 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) [2021-08-25 20:13:59,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 531 transitions. [2021-08-25 20:13:59,821 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 531 transitions. Word has length 21 [2021-08-25 20:13:59,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:13:59,823 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 531 transitions. [2021-08-25 20:13:59,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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) [2021-08-25 20:13:59,824 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 531 transitions. [2021-08-25 20:13:59,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-25 20:13:59,830 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:13:59,830 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:13:59,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-25 20:13:59,831 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:13:59,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:13:59,832 INFO L82 PathProgramCache]: Analyzing trace with hash -529777174, now seen corresponding path program 1 times [2021-08-25 20:13:59,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:13:59,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703721022] [2021-08-25 20:13:59,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:13:59,834 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:13:59,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:13:59,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:13:59,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:13:59,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703721022] [2021-08-25 20:13:59,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703721022] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:13:59,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:13:59,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:13:59,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664646088] [2021-08-25 20:13:59,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:13:59,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:13:59,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:13:59,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:59,892 INFO L87 Difference]: Start difference. First operand 301 states and 531 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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) [2021-08-25 20:13:59,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:13:59,905 INFO L93 Difference]: Finished difference Result 385 states and 685 transitions. [2021-08-25 20:13:59,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:13:59,906 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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) Word has length 21 [2021-08-25 20:13:59,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:13:59,908 INFO L225 Difference]: With dead ends: 385 [2021-08-25 20:13:59,908 INFO L226 Difference]: Without dead ends: 383 [2021-08-25 20:13:59,909 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:59,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-08-25 20:13:59,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 301. [2021-08-25 20:13:59,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 1.7566666666666666) internal successors, (527), 300 states have internal predecessors, (527), 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) [2021-08-25 20:13:59,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 527 transitions. [2021-08-25 20:13:59,920 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 527 transitions. Word has length 21 [2021-08-25 20:13:59,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:13:59,921 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 527 transitions. [2021-08-25 20:13:59,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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) [2021-08-25 20:13:59,921 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 527 transitions. [2021-08-25 20:13:59,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-25 20:13:59,922 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:13:59,922 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:13:59,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-25 20:13:59,923 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:13:59,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:13:59,923 INFO L82 PathProgramCache]: Analyzing trace with hash -264078182, now seen corresponding path program 1 times [2021-08-25 20:13:59,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:13:59,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508607167] [2021-08-25 20:13:59,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:13:59,924 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:13:59,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:13:59,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:13:59,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:13:59,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508607167] [2021-08-25 20:13:59,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508607167] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:13:59,973 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:13:59,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:13:59,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539618764] [2021-08-25 20:13:59,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:13:59,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:13:59,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:13:59,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:59,976 INFO L87 Difference]: Start difference. First operand 301 states and 527 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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) [2021-08-25 20:14:00,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:00,002 INFO L93 Difference]: Finished difference Result 565 states and 1001 transitions. [2021-08-25 20:14:00,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:00,003 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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) Word has length 22 [2021-08-25 20:14:00,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:00,006 INFO L225 Difference]: With dead ends: 565 [2021-08-25 20:14:00,006 INFO L226 Difference]: Without dead ends: 563 [2021-08-25 20:14:00,007 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:00,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-08-25 20:14:00,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 417. [2021-08-25 20:14:00,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 1.7283653846153846) internal successors, (719), 416 states have internal predecessors, (719), 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) [2021-08-25 20:14:00,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 719 transitions. [2021-08-25 20:14:00,027 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 719 transitions. Word has length 22 [2021-08-25 20:14:00,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:00,028 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 719 transitions. [2021-08-25 20:14:00,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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) [2021-08-25 20:14:00,028 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 719 transitions. [2021-08-25 20:14:00,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-25 20:14:00,029 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:00,029 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:14:00,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-25 20:14:00,029 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:00,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:00,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1543941860, now seen corresponding path program 1 times [2021-08-25 20:14:00,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:00,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873578309] [2021-08-25 20:14:00,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:00,031 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:00,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:00,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:00,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:00,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873578309] [2021-08-25 20:14:00,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873578309] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:00,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:00,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:00,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416189645] [2021-08-25 20:14:00,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:00,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:00,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:00,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:00,057 INFO L87 Difference]: Start difference. First operand 417 states and 719 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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) [2021-08-25 20:14:00,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:00,078 INFO L93 Difference]: Finished difference Result 997 states and 1729 transitions. [2021-08-25 20:14:00,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:00,079 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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) Word has length 22 [2021-08-25 20:14:00,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:00,081 INFO L225 Difference]: With dead ends: 997 [2021-08-25 20:14:00,081 INFO L226 Difference]: Without dead ends: 587 [2021-08-25 20:14:00,083 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:00,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-08-25 20:14:00,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 585. [2021-08-25 20:14:00,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 1.7174657534246576) internal successors, (1003), 584 states have internal predecessors, (1003), 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) [2021-08-25 20:14:00,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1003 transitions. [2021-08-25 20:14:00,106 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1003 transitions. Word has length 22 [2021-08-25 20:14:00,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:00,107 INFO L470 AbstractCegarLoop]: Abstraction has 585 states and 1003 transitions. [2021-08-25 20:14:00,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 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) [2021-08-25 20:14:00,108 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1003 transitions. [2021-08-25 20:14:00,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-25 20:14:00,110 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:00,110 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:14:00,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-25 20:14:00,110 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:00,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:00,111 INFO L82 PathProgramCache]: Analyzing trace with hash 403724673, now seen corresponding path program 1 times [2021-08-25 20:14:00,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:00,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528888936] [2021-08-25 20:14:00,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:00,113 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:00,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:00,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:00,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:00,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528888936] [2021-08-25 20:14:00,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528888936] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:00,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:00,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:00,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635654171] [2021-08-25 20:14:00,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:00,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:00,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:00,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:00,176 INFO L87 Difference]: Start difference. First operand 585 states and 1003 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2021-08-25 20:14:00,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:00,199 INFO L93 Difference]: Finished difference Result 885 states and 1513 transitions. [2021-08-25 20:14:00,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:00,200 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) Word has length 23 [2021-08-25 20:14:00,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:00,203 INFO L225 Difference]: With dead ends: 885 [2021-08-25 20:14:00,203 INFO L226 Difference]: Without dead ends: 599 [2021-08-25 20:14:00,204 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:00,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-08-25 20:14:00,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 597. [2021-08-25 20:14:00,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 596 states have (on average 1.6963087248322148) internal successors, (1011), 596 states have internal predecessors, (1011), 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) [2021-08-25 20:14:00,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 1011 transitions. [2021-08-25 20:14:00,218 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 1011 transitions. Word has length 23 [2021-08-25 20:14:00,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:00,219 INFO L470 AbstractCegarLoop]: Abstraction has 597 states and 1011 transitions. [2021-08-25 20:14:00,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2021-08-25 20:14:00,219 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 1011 transitions. [2021-08-25 20:14:00,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-25 20:14:00,220 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:00,220 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:14:00,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-25 20:14:00,220 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:00,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:00,221 INFO L82 PathProgramCache]: Analyzing trace with hash -617343681, now seen corresponding path program 1 times [2021-08-25 20:14:00,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:00,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355016538] [2021-08-25 20:14:00,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:00,222 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:00,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:00,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:00,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:00,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355016538] [2021-08-25 20:14:00,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355016538] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:00,244 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:00,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:00,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312458831] [2021-08-25 20:14:00,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:00,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:00,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:00,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:00,246 INFO L87 Difference]: Start difference. First operand 597 states and 1011 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2021-08-25 20:14:00,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:00,263 INFO L93 Difference]: Finished difference Result 1097 states and 1885 transitions. [2021-08-25 20:14:00,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:00,264 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) Word has length 23 [2021-08-25 20:14:00,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:00,268 INFO L225 Difference]: With dead ends: 1097 [2021-08-25 20:14:00,268 INFO L226 Difference]: Without dead ends: 1095 [2021-08-25 20:14:00,269 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:00,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1095 states. [2021-08-25 20:14:00,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1095 to 837. [2021-08-25 20:14:00,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 836 states have (on average 1.6590909090909092) internal successors, (1387), 836 states have internal predecessors, (1387), 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) [2021-08-25 20:14:00,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1387 transitions. [2021-08-25 20:14:00,290 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1387 transitions. Word has length 23 [2021-08-25 20:14:00,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:00,291 INFO L470 AbstractCegarLoop]: Abstraction has 837 states and 1387 transitions. [2021-08-25 20:14:00,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2021-08-25 20:14:00,291 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1387 transitions. [2021-08-25 20:14:00,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-25 20:14:00,292 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:00,292 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:14:00,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-25 20:14:00,293 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:00,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:00,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1897207359, now seen corresponding path program 1 times [2021-08-25 20:14:00,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:00,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467324536] [2021-08-25 20:14:00,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:00,294 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:00,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:00,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:00,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:00,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467324536] [2021-08-25 20:14:00,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467324536] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:00,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:00,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:00,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890551249] [2021-08-25 20:14:00,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:00,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:00,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:00,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:00,318 INFO L87 Difference]: Start difference. First operand 837 states and 1387 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2021-08-25 20:14:00,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:00,347 INFO L93 Difference]: Finished difference Result 1977 states and 3293 transitions. [2021-08-25 20:14:00,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:00,347 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) Word has length 23 [2021-08-25 20:14:00,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:00,352 INFO L225 Difference]: With dead ends: 1977 [2021-08-25 20:14:00,353 INFO L226 Difference]: Without dead ends: 1159 [2021-08-25 20:14:00,360 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:00,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2021-08-25 20:14:00,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 1157. [2021-08-25 20:14:00,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1156 states have (on average 1.6496539792387543) internal successors, (1907), 1156 states have internal predecessors, (1907), 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) [2021-08-25 20:14:00,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 1907 transitions. [2021-08-25 20:14:00,389 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 1907 transitions. Word has length 23 [2021-08-25 20:14:00,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:00,389 INFO L470 AbstractCegarLoop]: Abstraction has 1157 states and 1907 transitions. [2021-08-25 20:14:00,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2021-08-25 20:14:00,389 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 1907 transitions. [2021-08-25 20:14:00,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-25 20:14:00,392 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:00,392 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:14:00,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-25 20:14:00,392 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:00,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:00,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1957570863, now seen corresponding path program 1 times [2021-08-25 20:14:00,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:00,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673770282] [2021-08-25 20:14:00,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:00,393 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:00,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:00,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:00,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:00,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673770282] [2021-08-25 20:14:00,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673770282] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:00,424 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:00,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:00,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455055250] [2021-08-25 20:14:00,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:00,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:00,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:00,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:00,426 INFO L87 Difference]: Start difference. First operand 1157 states and 1907 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2021-08-25 20:14:00,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:00,449 INFO L93 Difference]: Finished difference Result 1737 states and 2853 transitions. [2021-08-25 20:14:00,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:00,450 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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) Word has length 24 [2021-08-25 20:14:00,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:00,454 INFO L225 Difference]: With dead ends: 1737 [2021-08-25 20:14:00,454 INFO L226 Difference]: Without dead ends: 1175 [2021-08-25 20:14:00,456 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:00,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2021-08-25 20:14:00,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 1173. [2021-08-25 20:14:00,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 1172 states have (on average 1.6271331058020477) internal successors, (1907), 1172 states have internal predecessors, (1907), 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) [2021-08-25 20:14:00,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 1907 transitions. [2021-08-25 20:14:00,493 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 1907 transitions. Word has length 24 [2021-08-25 20:14:00,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:00,495 INFO L470 AbstractCegarLoop]: Abstraction has 1173 states and 1907 transitions. [2021-08-25 20:14:00,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2021-08-25 20:14:00,495 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 1907 transitions. [2021-08-25 20:14:00,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-25 20:14:00,496 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:00,496 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:14:00,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-25 20:14:00,497 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:00,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:00,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1316328079, now seen corresponding path program 1 times [2021-08-25 20:14:00,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:00,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166003587] [2021-08-25 20:14:00,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:00,502 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:00,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:00,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:00,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:00,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166003587] [2021-08-25 20:14:00,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166003587] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:00,539 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:00,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:00,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854976901] [2021-08-25 20:14:00,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:00,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:00,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:00,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:00,541 INFO L87 Difference]: Start difference. First operand 1173 states and 1907 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2021-08-25 20:14:00,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:00,583 INFO L93 Difference]: Finished difference Result 2121 states and 3509 transitions. [2021-08-25 20:14:00,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:00,584 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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) Word has length 24 [2021-08-25 20:14:00,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:00,591 INFO L225 Difference]: With dead ends: 2121 [2021-08-25 20:14:00,591 INFO L226 Difference]: Without dead ends: 2119 [2021-08-25 20:14:00,593 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:00,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2119 states. [2021-08-25 20:14:00,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2119 to 1669. [2021-08-25 20:14:00,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1669 states, 1668 states have (on average 1.5845323741007193) internal successors, (2643), 1668 states have internal predecessors, (2643), 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) [2021-08-25 20:14:00,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 2643 transitions. [2021-08-25 20:14:00,634 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 2643 transitions. Word has length 24 [2021-08-25 20:14:00,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:00,634 INFO L470 AbstractCegarLoop]: Abstraction has 1669 states and 2643 transitions. [2021-08-25 20:14:00,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2021-08-25 20:14:00,635 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 2643 transitions. [2021-08-25 20:14:00,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-25 20:14:00,638 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:00,638 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:14:00,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-08-25 20:14:00,638 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:00,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:00,639 INFO L82 PathProgramCache]: Analyzing trace with hash 36464401, now seen corresponding path program 1 times [2021-08-25 20:14:00,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:00,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195683402] [2021-08-25 20:14:00,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:00,639 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:00,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:00,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:00,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:00,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195683402] [2021-08-25 20:14:00,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195683402] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:00,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:00,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:00,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705964201] [2021-08-25 20:14:00,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:00,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:00,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:00,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:00,665 INFO L87 Difference]: Start difference. First operand 1669 states and 2643 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2021-08-25 20:14:00,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:00,701 INFO L93 Difference]: Finished difference Result 3913 states and 6229 transitions. [2021-08-25 20:14:00,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:00,702 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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) Word has length 24 [2021-08-25 20:14:00,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:00,710 INFO L225 Difference]: With dead ends: 3913 [2021-08-25 20:14:00,711 INFO L226 Difference]: Without dead ends: 2279 [2021-08-25 20:14:00,713 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:00,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2279 states. [2021-08-25 20:14:00,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2279 to 2277. [2021-08-25 20:14:00,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2277 states, 2276 states have (on average 1.5760105448154658) internal successors, (3587), 2276 states have internal predecessors, (3587), 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) [2021-08-25 20:14:00,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2277 states to 2277 states and 3587 transitions. [2021-08-25 20:14:00,788 INFO L78 Accepts]: Start accepts. Automaton has 2277 states and 3587 transitions. Word has length 24 [2021-08-25 20:14:00,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:00,788 INFO L470 AbstractCegarLoop]: Abstraction has 2277 states and 3587 transitions. [2021-08-25 20:14:00,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2021-08-25 20:14:00,789 INFO L276 IsEmpty]: Start isEmpty. Operand 2277 states and 3587 transitions. [2021-08-25 20:14:00,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-25 20:14:00,791 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:00,792 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:14:00,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-08-25 20:14:00,792 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:00,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:00,793 INFO L82 PathProgramCache]: Analyzing trace with hash -2143288106, now seen corresponding path program 1 times [2021-08-25 20:14:00,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:00,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269772461] [2021-08-25 20:14:00,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:00,794 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:00,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:00,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:00,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:00,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269772461] [2021-08-25 20:14:00,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269772461] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:00,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:00,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:00,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603239588] [2021-08-25 20:14:00,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:00,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:00,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:00,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:00,828 INFO L87 Difference]: Start difference. First operand 2277 states and 3587 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) [2021-08-25 20:14:00,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:00,866 INFO L93 Difference]: Finished difference Result 3417 states and 5365 transitions. [2021-08-25 20:14:00,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:00,867 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) Word has length 25 [2021-08-25 20:14:00,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:00,875 INFO L225 Difference]: With dead ends: 3417 [2021-08-25 20:14:00,876 INFO L226 Difference]: Without dead ends: 2311 [2021-08-25 20:14:00,878 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:00,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2311 states. [2021-08-25 20:14:00,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2311 to 2309. [2021-08-25 20:14:00,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2309 states, 2308 states have (on average 1.5541594454072791) internal successors, (3587), 2308 states have internal predecessors, (3587), 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) [2021-08-25 20:14:00,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2309 states to 2309 states and 3587 transitions. [2021-08-25 20:14:00,934 INFO L78 Accepts]: Start accepts. Automaton has 2309 states and 3587 transitions. Word has length 25 [2021-08-25 20:14:00,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:00,935 INFO L470 AbstractCegarLoop]: Abstraction has 2309 states and 3587 transitions. [2021-08-25 20:14:00,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) [2021-08-25 20:14:00,935 INFO L276 IsEmpty]: Start isEmpty. Operand 2309 states and 3587 transitions. [2021-08-25 20:14:00,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-25 20:14:00,938 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:00,938 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:14:00,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-08-25 20:14:00,939 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:00,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:00,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1130610836, now seen corresponding path program 1 times [2021-08-25 20:14:00,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:00,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118977130] [2021-08-25 20:14:00,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:00,940 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:00,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:00,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:00,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:00,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118977130] [2021-08-25 20:14:00,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118977130] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:00,965 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:00,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:00,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590982809] [2021-08-25 20:14:00,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:00,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:00,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:00,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:00,968 INFO L87 Difference]: Start difference. First operand 2309 states and 3587 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) [2021-08-25 20:14:01,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:01,031 INFO L93 Difference]: Finished difference Result 4105 states and 6501 transitions. [2021-08-25 20:14:01,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:01,032 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) Word has length 25 [2021-08-25 20:14:01,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:01,046 INFO L225 Difference]: With dead ends: 4105 [2021-08-25 20:14:01,046 INFO L226 Difference]: Without dead ends: 4103 [2021-08-25 20:14:01,047 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:01,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4103 states. [2021-08-25 20:14:01,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4103 to 3333. [2021-08-25 20:14:01,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3333 states, 3332 states have (on average 1.508703481392557) internal successors, (5027), 3332 states have internal predecessors, (5027), 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) [2021-08-25 20:14:01,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3333 states to 3333 states and 5027 transitions. [2021-08-25 20:14:01,140 INFO L78 Accepts]: Start accepts. Automaton has 3333 states and 5027 transitions. Word has length 25 [2021-08-25 20:14:01,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:01,140 INFO L470 AbstractCegarLoop]: Abstraction has 3333 states and 5027 transitions. [2021-08-25 20:14:01,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) [2021-08-25 20:14:01,141 INFO L276 IsEmpty]: Start isEmpty. Operand 3333 states and 5027 transitions. [2021-08-25 20:14:01,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-25 20:14:01,145 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:01,145 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:14:01,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-08-25 20:14:01,146 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:01,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:01,147 INFO L82 PathProgramCache]: Analyzing trace with hash -149252842, now seen corresponding path program 1 times [2021-08-25 20:14:01,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:01,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335293499] [2021-08-25 20:14:01,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:01,147 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:01,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:01,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:01,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:01,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335293499] [2021-08-25 20:14:01,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335293499] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:01,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:01,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:01,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977469785] [2021-08-25 20:14:01,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:01,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:01,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:01,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:01,181 INFO L87 Difference]: Start difference. First operand 3333 states and 5027 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) [2021-08-25 20:14:01,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:01,268 INFO L93 Difference]: Finished difference Result 7753 states and 11749 transitions. [2021-08-25 20:14:01,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:01,268 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) Word has length 25 [2021-08-25 20:14:01,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:01,284 INFO L225 Difference]: With dead ends: 7753 [2021-08-25 20:14:01,284 INFO L226 Difference]: Without dead ends: 4487 [2021-08-25 20:14:01,288 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:01,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4487 states. [2021-08-25 20:14:01,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4487 to 4485. [2021-08-25 20:14:01,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4485 states, 4484 states have (on average 1.4993309545049063) internal successors, (6723), 4484 states have internal predecessors, (6723), 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) [2021-08-25 20:14:01,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4485 states to 4485 states and 6723 transitions. [2021-08-25 20:14:01,397 INFO L78 Accepts]: Start accepts. Automaton has 4485 states and 6723 transitions. Word has length 25 [2021-08-25 20:14:01,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:01,398 INFO L470 AbstractCegarLoop]: Abstraction has 4485 states and 6723 transitions. [2021-08-25 20:14:01,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) [2021-08-25 20:14:01,398 INFO L276 IsEmpty]: Start isEmpty. Operand 4485 states and 6723 transitions. [2021-08-25 20:14:01,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-25 20:14:01,402 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:01,403 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:14:01,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-08-25 20:14:01,411 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:01,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:01,412 INFO L82 PathProgramCache]: Analyzing trace with hash 689412294, now seen corresponding path program 1 times [2021-08-25 20:14:01,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:01,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260025796] [2021-08-25 20:14:01,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:01,413 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:01,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:01,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:01,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:01,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260025796] [2021-08-25 20:14:01,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260025796] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:01,439 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:01,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:01,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766005406] [2021-08-25 20:14:01,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:01,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:01,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:01,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:01,441 INFO L87 Difference]: Start difference. First operand 4485 states and 6723 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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) [2021-08-25 20:14:01,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:01,496 INFO L93 Difference]: Finished difference Result 6729 states and 10053 transitions. [2021-08-25 20:14:01,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:01,497 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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) Word has length 26 [2021-08-25 20:14:01,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:01,526 INFO L225 Difference]: With dead ends: 6729 [2021-08-25 20:14:01,526 INFO L226 Difference]: Without dead ends: 4551 [2021-08-25 20:14:01,531 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:01,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4551 states. [2021-08-25 20:14:01,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4551 to 4549. [2021-08-25 20:14:01,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4549 states, 4548 states have (on average 1.4782321899736148) internal successors, (6723), 4548 states have internal predecessors, (6723), 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) [2021-08-25 20:14:01,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4549 states to 4549 states and 6723 transitions. [2021-08-25 20:14:01,685 INFO L78 Accepts]: Start accepts. Automaton has 4549 states and 6723 transitions. Word has length 26 [2021-08-25 20:14:01,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:01,685 INFO L470 AbstractCegarLoop]: Abstraction has 4549 states and 6723 transitions. [2021-08-25 20:14:01,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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) [2021-08-25 20:14:01,685 INFO L276 IsEmpty]: Start isEmpty. Operand 4549 states and 6723 transitions. [2021-08-25 20:14:01,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-25 20:14:01,690 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:01,690 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:14:01,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-08-25 20:14:01,691 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:01,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:01,691 INFO L82 PathProgramCache]: Analyzing trace with hash -331656060, now seen corresponding path program 1 times [2021-08-25 20:14:01,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:01,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381011988] [2021-08-25 20:14:01,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:01,692 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:01,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:01,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:01,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:01,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381011988] [2021-08-25 20:14:01,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381011988] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:01,717 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:01,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:01,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441248600] [2021-08-25 20:14:01,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:01,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:01,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:01,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:01,719 INFO L87 Difference]: Start difference. First operand 4549 states and 6723 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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) [2021-08-25 20:14:01,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:01,812 INFO L93 Difference]: Finished difference Result 7945 states and 11973 transitions. [2021-08-25 20:14:01,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:01,813 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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) Word has length 26 [2021-08-25 20:14:01,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:01,827 INFO L225 Difference]: With dead ends: 7945 [2021-08-25 20:14:01,828 INFO L226 Difference]: Without dead ends: 7943 [2021-08-25 20:14:01,831 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:01,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7943 states. [2021-08-25 20:14:01,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7943 to 6661. [2021-08-25 20:14:02,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6661 states, 6660 states have (on average 1.4322822822822823) internal successors, (9539), 6660 states have internal predecessors, (9539), 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) [2021-08-25 20:14:02,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6661 states to 6661 states and 9539 transitions. [2021-08-25 20:14:02,023 INFO L78 Accepts]: Start accepts. Automaton has 6661 states and 9539 transitions. Word has length 26 [2021-08-25 20:14:02,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:02,023 INFO L470 AbstractCegarLoop]: Abstraction has 6661 states and 9539 transitions. [2021-08-25 20:14:02,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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) [2021-08-25 20:14:02,024 INFO L276 IsEmpty]: Start isEmpty. Operand 6661 states and 9539 transitions. [2021-08-25 20:14:02,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-25 20:14:02,033 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:02,033 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:14:02,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-08-25 20:14:02,033 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:02,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:02,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1611519738, now seen corresponding path program 1 times [2021-08-25 20:14:02,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:02,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880464680] [2021-08-25 20:14:02,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:02,035 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:02,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:02,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:02,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:02,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880464680] [2021-08-25 20:14:02,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880464680] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:02,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:02,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:02,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132608081] [2021-08-25 20:14:02,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:02,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:02,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:02,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:02,080 INFO L87 Difference]: Start difference. First operand 6661 states and 9539 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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) [2021-08-25 20:14:02,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:02,193 INFO L93 Difference]: Finished difference Result 15369 states and 22085 transitions. [2021-08-25 20:14:02,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:02,193 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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) Word has length 26 [2021-08-25 20:14:02,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:02,210 INFO L225 Difference]: With dead ends: 15369 [2021-08-25 20:14:02,211 INFO L226 Difference]: Without dead ends: 8839 [2021-08-25 20:14:02,221 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:02,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8839 states. [2021-08-25 20:14:02,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8839 to 8837. [2021-08-25 20:14:02,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8837 states, 8836 states have (on average 1.4199864191942055) internal successors, (12547), 8836 states have internal predecessors, (12547), 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) [2021-08-25 20:14:02,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8837 states to 8837 states and 12547 transitions. [2021-08-25 20:14:02,507 INFO L78 Accepts]: Start accepts. Automaton has 8837 states and 12547 transitions. Word has length 26 [2021-08-25 20:14:02,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:02,508 INFO L470 AbstractCegarLoop]: Abstraction has 8837 states and 12547 transitions. [2021-08-25 20:14:02,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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) [2021-08-25 20:14:02,508 INFO L276 IsEmpty]: Start isEmpty. Operand 8837 states and 12547 transitions. [2021-08-25 20:14:02,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-25 20:14:02,519 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:02,519 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:14:02,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-08-25 20:14:02,520 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:02,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:02,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1691188181, now seen corresponding path program 1 times [2021-08-25 20:14:02,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:02,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846757779] [2021-08-25 20:14:02,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:02,521 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:02,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:02,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:02,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:02,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846757779] [2021-08-25 20:14:02,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846757779] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:02,544 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:02,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:02,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047540893] [2021-08-25 20:14:02,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:02,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:02,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:02,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:02,548 INFO L87 Difference]: Start difference. First operand 8837 states and 12547 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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) [2021-08-25 20:14:02,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:02,653 INFO L93 Difference]: Finished difference Result 13257 states and 18757 transitions. [2021-08-25 20:14:02,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:02,653 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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) Word has length 27 [2021-08-25 20:14:02,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:02,670 INFO L225 Difference]: With dead ends: 13257 [2021-08-25 20:14:02,670 INFO L226 Difference]: Without dead ends: 8967 [2021-08-25 20:14:02,679 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:02,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8967 states. [2021-08-25 20:14:02,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8967 to 8965. [2021-08-25 20:14:02,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8965 states, 8964 states have (on average 1.3997099509147701) internal successors, (12547), 8964 states have internal predecessors, (12547), 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) [2021-08-25 20:14:02,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8965 states to 8965 states and 12547 transitions. [2021-08-25 20:14:02,926 INFO L78 Accepts]: Start accepts. Automaton has 8965 states and 12547 transitions. Word has length 27 [2021-08-25 20:14:02,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:02,927 INFO L470 AbstractCegarLoop]: Abstraction has 8965 states and 12547 transitions. [2021-08-25 20:14:02,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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) [2021-08-25 20:14:02,927 INFO L276 IsEmpty]: Start isEmpty. Operand 8965 states and 12547 transitions. [2021-08-25 20:14:02,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-25 20:14:02,936 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:02,936 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:14:02,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-08-25 20:14:02,936 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:02,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:02,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1582710761, now seen corresponding path program 1 times [2021-08-25 20:14:02,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:02,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486995199] [2021-08-25 20:14:02,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:02,938 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:02,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:02,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:02,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:02,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486995199] [2021-08-25 20:14:02,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486995199] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:02,959 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:02,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:02,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553905315] [2021-08-25 20:14:02,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:02,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:02,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:02,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:02,961 INFO L87 Difference]: Start difference. First operand 8965 states and 12547 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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) [2021-08-25 20:14:03,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:03,158 INFO L93 Difference]: Finished difference Result 15369 states and 21893 transitions. [2021-08-25 20:14:03,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:03,158 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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) Word has length 27 [2021-08-25 20:14:03,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:03,187 INFO L225 Difference]: With dead ends: 15369 [2021-08-25 20:14:03,187 INFO L226 Difference]: Without dead ends: 15367 [2021-08-25 20:14:03,190 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:03,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15367 states. [2021-08-25 20:14:03,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15367 to 13317. [2021-08-25 20:14:03,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13317 states, 13316 states have (on average 1.3555872634424753) internal successors, (18051), 13316 states have internal predecessors, (18051), 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) [2021-08-25 20:14:03,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13317 states to 13317 states and 18051 transitions. [2021-08-25 20:14:03,459 INFO L78 Accepts]: Start accepts. Automaton has 13317 states and 18051 transitions. Word has length 27 [2021-08-25 20:14:03,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:03,459 INFO L470 AbstractCegarLoop]: Abstraction has 13317 states and 18051 transitions. [2021-08-25 20:14:03,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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) [2021-08-25 20:14:03,459 INFO L276 IsEmpty]: Start isEmpty. Operand 13317 states and 18051 transitions. [2021-08-25 20:14:03,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-25 20:14:03,477 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:03,477 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:14:03,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-08-25 20:14:03,477 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:03,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:03,478 INFO L82 PathProgramCache]: Analyzing trace with hash 302847083, now seen corresponding path program 1 times [2021-08-25 20:14:03,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:03,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289932729] [2021-08-25 20:14:03,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:03,478 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:03,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:03,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:03,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:03,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289932729] [2021-08-25 20:14:03,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289932729] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:03,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:03,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:03,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481217796] [2021-08-25 20:14:03,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:03,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:03,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:03,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:03,498 INFO L87 Difference]: Start difference. First operand 13317 states and 18051 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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) [2021-08-25 20:14:03,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:03,742 INFO L93 Difference]: Finished difference Result 30473 states and 41349 transitions. [2021-08-25 20:14:03,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:03,743 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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) Word has length 27 [2021-08-25 20:14:03,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:03,775 INFO L225 Difference]: With dead ends: 30473 [2021-08-25 20:14:03,775 INFO L226 Difference]: Without dead ends: 17415 [2021-08-25 20:14:03,791 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:03,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17415 states. [2021-08-25 20:14:04,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17415 to 17413. [2021-08-25 20:14:04,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17413 states, 17412 states have (on average 1.3381001608086378) internal successors, (23299), 17412 states have internal predecessors, (23299), 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) [2021-08-25 20:14:04,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17413 states to 17413 states and 23299 transitions. [2021-08-25 20:14:04,219 INFO L78 Accepts]: Start accepts. Automaton has 17413 states and 23299 transitions. Word has length 27 [2021-08-25 20:14:04,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:04,219 INFO L470 AbstractCegarLoop]: Abstraction has 17413 states and 23299 transitions. [2021-08-25 20:14:04,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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) [2021-08-25 20:14:04,219 INFO L276 IsEmpty]: Start isEmpty. Operand 17413 states and 23299 transitions. [2021-08-25 20:14:04,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-25 20:14:04,237 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:04,238 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:14:04,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-08-25 20:14:04,238 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:04,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:04,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1819608763, now seen corresponding path program 1 times [2021-08-25 20:14:04,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:04,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129328153] [2021-08-25 20:14:04,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:04,239 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:04,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:04,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:04,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:04,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129328153] [2021-08-25 20:14:04,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129328153] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:04,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:04,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:04,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994672657] [2021-08-25 20:14:04,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:04,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:04,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:04,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:04,260 INFO L87 Difference]: Start difference. First operand 17413 states and 23299 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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) [2021-08-25 20:14:04,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:04,430 INFO L93 Difference]: Finished difference Result 26121 states and 34821 transitions. [2021-08-25 20:14:04,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:04,431 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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) Word has length 28 [2021-08-25 20:14:04,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:04,463 INFO L225 Difference]: With dead ends: 26121 [2021-08-25 20:14:04,463 INFO L226 Difference]: Without dead ends: 17671 [2021-08-25 20:14:04,478 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:04,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17671 states. [2021-08-25 20:14:04,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17671 to 17669. [2021-08-25 20:14:04,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17669 states, 17668 states have (on average 1.318711795336201) internal successors, (23299), 17668 states have internal predecessors, (23299), 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) [2021-08-25 20:14:04,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17669 states to 17669 states and 23299 transitions. [2021-08-25 20:14:04,942 INFO L78 Accepts]: Start accepts. Automaton has 17669 states and 23299 transitions. Word has length 28 [2021-08-25 20:14:04,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:04,943 INFO L470 AbstractCegarLoop]: Abstraction has 17669 states and 23299 transitions. [2021-08-25 20:14:04,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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) [2021-08-25 20:14:04,943 INFO L276 IsEmpty]: Start isEmpty. Operand 17669 states and 23299 transitions. [2021-08-25 20:14:04,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-25 20:14:04,962 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:04,963 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:14:04,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-08-25 20:14:04,963 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:04,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:04,964 INFO L82 PathProgramCache]: Analyzing trace with hash 798540409, now seen corresponding path program 1 times [2021-08-25 20:14:04,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:04,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024640848] [2021-08-25 20:14:04,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:04,964 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:04,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:04,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:04,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:04,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024640848] [2021-08-25 20:14:04,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024640848] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:04,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:04,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:04,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689409138] [2021-08-25 20:14:04,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:04,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:04,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:04,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:04,989 INFO L87 Difference]: Start difference. First operand 17669 states and 23299 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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) [2021-08-25 20:14:05,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:05,275 INFO L93 Difference]: Finished difference Result 29705 states and 39685 transitions. [2021-08-25 20:14:05,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:05,276 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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) Word has length 28 [2021-08-25 20:14:05,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:05,333 INFO L225 Difference]: With dead ends: 29705 [2021-08-25 20:14:05,334 INFO L226 Difference]: Without dead ends: 29703 [2021-08-25 20:14:05,343 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:05,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29703 states. [2021-08-25 20:14:05,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29703 to 26629. [2021-08-25 20:14:05,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26629 states, 26628 states have (on average 1.2787667117320114) internal successors, (34051), 26628 states have internal predecessors, (34051), 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) [2021-08-25 20:14:05,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26629 states to 26629 states and 34051 transitions. [2021-08-25 20:14:05,881 INFO L78 Accepts]: Start accepts. Automaton has 26629 states and 34051 transitions. Word has length 28 [2021-08-25 20:14:05,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:05,882 INFO L470 AbstractCegarLoop]: Abstraction has 26629 states and 34051 transitions. [2021-08-25 20:14:05,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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) [2021-08-25 20:14:05,882 INFO L276 IsEmpty]: Start isEmpty. Operand 26629 states and 34051 transitions. [2021-08-25 20:14:05,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-25 20:14:05,915 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:05,915 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:14:05,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-08-25 20:14:05,915 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:05,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:05,916 INFO L82 PathProgramCache]: Analyzing trace with hash -481323269, now seen corresponding path program 1 times [2021-08-25 20:14:05,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:05,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860967614] [2021-08-25 20:14:05,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:05,916 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:05,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:05,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:05,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:05,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860967614] [2021-08-25 20:14:05,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860967614] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:05,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:05,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:05,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948214773] [2021-08-25 20:14:05,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:05,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:05,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:05,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:05,935 INFO L87 Difference]: Start difference. First operand 26629 states and 34051 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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) [2021-08-25 20:14:06,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:06,231 INFO L93 Difference]: Finished difference Result 60425 states and 77061 transitions. [2021-08-25 20:14:06,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:06,231 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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) Word has length 28 [2021-08-25 20:14:06,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:06,296 INFO L225 Difference]: With dead ends: 60425 [2021-08-25 20:14:06,297 INFO L226 Difference]: Without dead ends: 34311 [2021-08-25 20:14:06,328 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:06,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34311 states. [2021-08-25 20:14:07,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34311 to 34309. [2021-08-25 20:14:07,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34309 states, 34308 states have (on average 1.2536726128016789) internal successors, (43011), 34308 states have internal predecessors, (43011), 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) [2021-08-25 20:14:07,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34309 states to 34309 states and 43011 transitions. [2021-08-25 20:14:07,184 INFO L78 Accepts]: Start accepts. Automaton has 34309 states and 43011 transitions. Word has length 28 [2021-08-25 20:14:07,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:07,184 INFO L470 AbstractCegarLoop]: Abstraction has 34309 states and 43011 transitions. [2021-08-25 20:14:07,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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) [2021-08-25 20:14:07,185 INFO L276 IsEmpty]: Start isEmpty. Operand 34309 states and 43011 transitions. [2021-08-25 20:14:07,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-25 20:14:07,207 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:07,207 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:14:07,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-08-25 20:14:07,208 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:07,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:07,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1014835328, now seen corresponding path program 1 times [2021-08-25 20:14:07,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:07,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717238701] [2021-08-25 20:14:07,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:07,210 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:07,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:07,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:07,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:07,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717238701] [2021-08-25 20:14:07,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717238701] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:07,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:07,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:07,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740431260] [2021-08-25 20:14:07,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:07,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:07,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:07,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:07,312 INFO L87 Difference]: Start difference. First operand 34309 states and 43011 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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) [2021-08-25 20:14:07,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:07,640 INFO L93 Difference]: Finished difference Result 51465 states and 64261 transitions. [2021-08-25 20:14:07,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:07,640 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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) Word has length 29 [2021-08-25 20:14:07,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:07,688 INFO L225 Difference]: With dead ends: 51465 [2021-08-25 20:14:07,688 INFO L226 Difference]: Without dead ends: 34823 [2021-08-25 20:14:07,703 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:07,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34823 states. [2021-08-25 20:14:08,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34823 to 34821. [2021-08-25 20:14:08,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34821 states, 34820 states have (on average 1.23523836875359) internal successors, (43011), 34820 states have internal predecessors, (43011), 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) [2021-08-25 20:14:08,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34821 states to 34821 states and 43011 transitions. [2021-08-25 20:14:08,243 INFO L78 Accepts]: Start accepts. Automaton has 34821 states and 43011 transitions. Word has length 29 [2021-08-25 20:14:08,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:08,243 INFO L470 AbstractCegarLoop]: Abstraction has 34821 states and 43011 transitions. [2021-08-25 20:14:08,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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) [2021-08-25 20:14:08,244 INFO L276 IsEmpty]: Start isEmpty. Operand 34821 states and 43011 transitions. [2021-08-25 20:14:08,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-25 20:14:08,263 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:08,263 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:14:08,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-08-25 20:14:08,264 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:08,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:08,264 INFO L82 PathProgramCache]: Analyzing trace with hash -2035903682, now seen corresponding path program 1 times [2021-08-25 20:14:08,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:08,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521996841] [2021-08-25 20:14:08,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:08,265 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:08,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:08,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:08,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:08,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521996841] [2021-08-25 20:14:08,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521996841] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:08,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:08,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:08,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482759023] [2021-08-25 20:14:08,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:08,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:08,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:08,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:08,284 INFO L87 Difference]: Start difference. First operand 34821 states and 43011 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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) [2021-08-25 20:14:09,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:09,069 INFO L93 Difference]: Finished difference Result 101385 states and 122885 transitions. [2021-08-25 20:14:09,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:09,070 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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) Word has length 29 [2021-08-25 20:14:09,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:09,168 INFO L225 Difference]: With dead ends: 101385 [2021-08-25 20:14:09,168 INFO L226 Difference]: Without dead ends: 67591 [2021-08-25 20:14:09,194 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:09,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67591 states. [2021-08-25 20:14:10,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67591 to 67589. [2021-08-25 20:14:10,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67589 states, 67588 states have (on average 1.1817926259099247) internal successors, (79875), 67588 states have internal predecessors, (79875), 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) [2021-08-25 20:14:10,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67589 states to 67589 states and 79875 transitions. [2021-08-25 20:14:10,269 INFO L78 Accepts]: Start accepts. Automaton has 67589 states and 79875 transitions. Word has length 29 [2021-08-25 20:14:10,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:10,269 INFO L470 AbstractCegarLoop]: Abstraction has 67589 states and 79875 transitions. [2021-08-25 20:14:10,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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) [2021-08-25 20:14:10,269 INFO L276 IsEmpty]: Start isEmpty. Operand 67589 states and 79875 transitions. [2021-08-25 20:14:10,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-25 20:14:10,308 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:10,309 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:14:10,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-08-25 20:14:10,309 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:10,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:10,310 INFO L82 PathProgramCache]: Analyzing trace with hash -756040004, now seen corresponding path program 1 times [2021-08-25 20:14:10,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:10,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297978133] [2021-08-25 20:14:10,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:10,310 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:10,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:10,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:10,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:10,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297978133] [2021-08-25 20:14:10,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297978133] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:10,328 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:10,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:10,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840398861] [2021-08-25 20:14:10,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:10,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:10,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:10,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:10,329 INFO L87 Difference]: Start difference. First operand 67589 states and 79875 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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) [2021-08-25 20:14:11,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:11,080 INFO L93 Difference]: Finished difference Result 71689 states and 86021 transitions. [2021-08-25 20:14:11,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:11,080 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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) Word has length 29 [2021-08-25 20:14:11,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:11,276 INFO L225 Difference]: With dead ends: 71689 [2021-08-25 20:14:11,276 INFO L226 Difference]: Without dead ends: 71687 [2021-08-25 20:14:11,295 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:11,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71687 states. [2021-08-25 20:14:12,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71687 to 67589. [2021-08-25 20:14:12,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67589 states, 67588 states have (on average 1.166642007456945) internal successors, (78851), 67588 states have internal predecessors, (78851), 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) [2021-08-25 20:14:12,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67589 states to 67589 states and 78851 transitions. [2021-08-25 20:14:12,189 INFO L78 Accepts]: Start accepts. Automaton has 67589 states and 78851 transitions. Word has length 29 [2021-08-25 20:14:12,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:12,190 INFO L470 AbstractCegarLoop]: Abstraction has 67589 states and 78851 transitions. [2021-08-25 20:14:12,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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) [2021-08-25 20:14:12,190 INFO L276 IsEmpty]: Start isEmpty. Operand 67589 states and 78851 transitions. [2021-08-25 20:14:12,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-25 20:14:12,219 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:12,219 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:14:12,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-08-25 20:14:12,219 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:12,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:12,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1311711408, now seen corresponding path program 1 times [2021-08-25 20:14:12,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:12,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936840668] [2021-08-25 20:14:12,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:12,220 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:12,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:12,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:12,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:12,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936840668] [2021-08-25 20:14:12,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936840668] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:12,240 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:12,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:12,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623196571] [2021-08-25 20:14:12,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:12,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:12,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:12,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:12,242 INFO L87 Difference]: Start difference. First operand 67589 states and 78851 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2021-08-25 20:14:13,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:13,206 INFO L93 Difference]: Finished difference Result 109575 states and 126980 transitions. [2021-08-25 20:14:13,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:13,206 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) Word has length 30 [2021-08-25 20:14:13,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:13,334 INFO L225 Difference]: With dead ends: 109575 [2021-08-25 20:14:13,335 INFO L226 Difference]: Without dead ends: 109573 [2021-08-25 20:14:13,355 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:13,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109573 states. [2021-08-25 20:14:14,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109573 to 105477. [2021-08-25 20:14:14,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105477 states, 105476 states have (on average 1.1456160643179492) internal successors, (120835), 105476 states have internal predecessors, (120835), 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) [2021-08-25 20:14:14,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105477 states to 105477 states and 120835 transitions. [2021-08-25 20:14:14,963 INFO L78 Accepts]: Start accepts. Automaton has 105477 states and 120835 transitions. Word has length 30 [2021-08-25 20:14:14,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:14,964 INFO L470 AbstractCegarLoop]: Abstraction has 105477 states and 120835 transitions. [2021-08-25 20:14:14,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2021-08-25 20:14:14,964 INFO L276 IsEmpty]: Start isEmpty. Operand 105477 states and 120835 transitions. [2021-08-25 20:14:15,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-25 20:14:15,035 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:14:15,035 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:14:15,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-08-25 20:14:15,035 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:14:15,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:14:15,035 INFO L82 PathProgramCache]: Analyzing trace with hash 31847730, now seen corresponding path program 1 times [2021-08-25 20:14:15,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:14:15,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188786191] [2021-08-25 20:14:15,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:14:15,036 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:14:15,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:14:15,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:14:15,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:14:15,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188786191] [2021-08-25 20:14:15,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188786191] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:14:15,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:14:15,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:14:15,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681951206] [2021-08-25 20:14:15,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:14:15,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:14:15,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:14:15,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:15,054 INFO L87 Difference]: Start difference. First operand 105477 states and 120835 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2021-08-25 20:14:16,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:14:16,482 INFO L93 Difference]: Finished difference Result 236549 states and 268291 transitions. [2021-08-25 20:14:16,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:14:16,483 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) Word has length 30 [2021-08-25 20:14:16,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:14:16,484 INFO L225 Difference]: With dead ends: 236549 [2021-08-25 20:14:16,484 INFO L226 Difference]: Without dead ends: 0 [2021-08-25 20:14:16,552 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:14:16,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-25 20:14:16,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-25 20:14:16,553 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) [2021-08-25 20:14:16,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-25 20:14:16,553 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 30 [2021-08-25 20:14:16,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:14:16,554 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-25 20:14:16,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2021-08-25 20:14:16,554 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-25 20:14:16,554 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-25 20:14:16,557 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-25 20:14:16,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-08-25 20:14:16,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-25 20:14:16,577 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-25 20:14:16,580 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-25 20:14:16,581 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-25 20:14:16,582 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-25 20:14:16,590 INFO L857 garLoopResultBuilder]: For program point L184(line 184) no Hoare annotation was computed. [2021-08-25 20:14:16,590 INFO L853 garLoopResultBuilder]: At program point L184-1(lines 7 193) the Hoare annotation is: false [2021-08-25 20:14:16,590 INFO L857 garLoopResultBuilder]: For program point L118-1(lines 47 188) no Hoare annotation was computed. [2021-08-25 20:14:16,591 INFO L857 garLoopResultBuilder]: For program point L168-1(lines 47 188) no Hoare annotation was computed. [2021-08-25 20:14:16,591 INFO L857 garLoopResultBuilder]: For program point L102-1(lines 47 188) no Hoare annotation was computed. [2021-08-25 20:14:16,591 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-25 20:14:16,591 INFO L857 garLoopResultBuilder]: For program point L86-1(lines 47 188) no Hoare annotation was computed. [2021-08-25 20:14:16,591 INFO L857 garLoopResultBuilder]: For program point L169(line 169) no Hoare annotation was computed. [2021-08-25 20:14:16,591 INFO L857 garLoopResultBuilder]: For program point L153-1(lines 47 188) no Hoare annotation was computed. [2021-08-25 20:14:16,591 INFO L857 garLoopResultBuilder]: For program point L154(line 154) no Hoare annotation was computed. [2021-08-25 20:14:16,592 INFO L857 garLoopResultBuilder]: For program point L138-1(lines 47 188) no Hoare annotation was computed. [2021-08-25 20:14:16,592 INFO L857 garLoopResultBuilder]: For program point L122-1(lines 47 188) no Hoare annotation was computed. [2021-08-25 20:14:16,592 INFO L857 garLoopResultBuilder]: For program point L139(line 139) no Hoare annotation was computed. [2021-08-25 20:14:16,592 INFO L857 garLoopResultBuilder]: For program point L106-1(lines 47 188) no Hoare annotation was computed. [2021-08-25 20:14:16,592 INFO L860 garLoopResultBuilder]: At program point L189(lines 7 193) the Hoare annotation is: true [2021-08-25 20:14:16,592 INFO L857 garLoopResultBuilder]: For program point L90-1(lines 47 188) no Hoare annotation was computed. [2021-08-25 20:14:16,593 INFO L857 garLoopResultBuilder]: For program point L173-1(lines 47 188) no Hoare annotation was computed. [2021-08-25 20:14:16,593 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-25 20:14:16,593 INFO L857 garLoopResultBuilder]: For program point L174(line 174) no Hoare annotation was computed. [2021-08-25 20:14:16,593 INFO L857 garLoopResultBuilder]: For program point L158-1(lines 47 188) no Hoare annotation was computed. [2021-08-25 20:14:16,593 INFO L860 garLoopResultBuilder]: At program point L192(lines 6 193) the Hoare annotation is: true [2021-08-25 20:14:16,593 INFO L857 garLoopResultBuilder]: For program point L159(line 159) no Hoare annotation was computed. [2021-08-25 20:14:16,594 INFO L857 garLoopResultBuilder]: For program point L143-1(lines 47 188) no Hoare annotation was computed. [2021-08-25 20:14:16,594 INFO L857 garLoopResultBuilder]: For program point L110-1(lines 47 188) no Hoare annotation was computed. [2021-08-25 20:14:16,594 INFO L857 garLoopResultBuilder]: For program point L94-1(lines 47 188) no Hoare annotation was computed. [2021-08-25 20:14:16,594 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-25 20:14:16,594 INFO L857 garLoopResultBuilder]: For program point L144(line 144) no Hoare annotation was computed. [2021-08-25 20:14:16,594 INFO L857 garLoopResultBuilder]: For program point L78(lines 78 80) no Hoare annotation was computed. [2021-08-25 20:14:16,594 INFO L857 garLoopResultBuilder]: For program point L78-2(lines 47 188) no Hoare annotation was computed. [2021-08-25 20:14:16,595 INFO L857 garLoopResultBuilder]: For program point L128-1(lines 47 188) no Hoare annotation was computed. [2021-08-25 20:14:16,595 INFO L857 garLoopResultBuilder]: For program point L178-1(lines 47 188) no Hoare annotation was computed. [2021-08-25 20:14:16,595 INFO L857 garLoopResultBuilder]: For program point L129(line 129) no Hoare annotation was computed. [2021-08-25 20:14:16,595 INFO L857 garLoopResultBuilder]: For program point L179(line 179) no Hoare annotation was computed. [2021-08-25 20:14:16,595 INFO L857 garLoopResultBuilder]: For program point L163-1(lines 47 188) no Hoare annotation was computed. [2021-08-25 20:14:16,595 INFO L857 garLoopResultBuilder]: For program point L114-1(lines 47 188) no Hoare annotation was computed. [2021-08-25 20:14:16,595 INFO L857 garLoopResultBuilder]: For program point L164(line 164) no Hoare annotation was computed. [2021-08-25 20:14:16,596 INFO L857 garLoopResultBuilder]: For program point L98-1(lines 47 188) no Hoare annotation was computed. [2021-08-25 20:14:16,596 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-25 20:14:16,596 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 191) no Hoare annotation was computed. [2021-08-25 20:14:16,596 INFO L857 garLoopResultBuilder]: For program point L148-1(lines 47 188) no Hoare annotation was computed. [2021-08-25 20:14:16,596 INFO L857 garLoopResultBuilder]: For program point L49(lines 49 51) no Hoare annotation was computed. [2021-08-25 20:14:16,596 INFO L857 garLoopResultBuilder]: For program point L82-1(lines 47 188) no Hoare annotation was computed. [2021-08-25 20:14:16,597 INFO L857 garLoopResultBuilder]: For program point L149(line 149) no Hoare annotation was computed. [2021-08-25 20:14:16,597 INFO L857 garLoopResultBuilder]: For program point L133-1(lines 47 188) no Hoare annotation was computed. [2021-08-25 20:14:16,597 INFO L860 garLoopResultBuilder]: At program point L183-1(lines 47 188) the Hoare annotation is: true [2021-08-25 20:14:16,597 INFO L857 garLoopResultBuilder]: For program point L134(line 134) no Hoare annotation was computed. [2021-08-25 20:14:16,601 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-25 20:14:16,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.08 08:14:16 BoogieIcfgContainer [2021-08-25 20:14:16,610 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-25 20:14:16,611 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-25 20:14:16,611 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-25 20:14:16,611 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-25 20:14:16,612 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 08:13:58" (3/4) ... [2021-08-25 20:14:16,614 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-25 20:14:16,626 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-08-25 20:14:16,626 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-25 20:14:16,627 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-25 20:14:16,627 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-25 20:14:16,676 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-25 20:14:16,676 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-25 20:14:16,679 INFO L168 Benchmark]: Toolchain (without parser) took 18835.36 ms. Allocated memory was 58.7 MB in the beginning and 12.3 GB in the end (delta: 12.3 GB). Free memory was 38.0 MB in the beginning and 11.1 GB in the end (delta: -11.1 GB). Peak memory consumption was 1.2 GB. Max. memory is 16.1 GB. [2021-08-25 20:14:16,679 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 58.7 MB. Free memory was 41.0 MB in the beginning and 41.0 MB in the end (delta: 73.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 20:14:16,680 INFO L168 Benchmark]: CACSL2BoogieTranslator took 314.08 ms. Allocated memory is still 58.7 MB. Free memory was 37.6 MB in the beginning and 42.8 MB in the end (delta: -5.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-08-25 20:14:16,680 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.21 ms. Allocated memory is still 58.7 MB. Free memory was 42.6 MB in the beginning and 40.8 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 20:14:16,681 INFO L168 Benchmark]: Boogie Preprocessor took 19.00 ms. Allocated memory is still 58.7 MB. Free memory was 40.8 MB in the beginning and 39.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 20:14:16,681 INFO L168 Benchmark]: RCFGBuilder took 575.82 ms. Allocated memory was 58.7 MB in the beginning and 71.3 MB in the end (delta: 12.6 MB). Free memory was 39.6 MB in the beginning and 45.5 MB in the end (delta: -5.9 MB). Peak memory consumption was 18.5 MB. Max. memory is 16.1 GB. [2021-08-25 20:14:16,681 INFO L168 Benchmark]: TraceAbstraction took 17823.37 ms. Allocated memory was 71.3 MB in the beginning and 12.3 GB in the end (delta: 12.3 GB). Free memory was 44.9 MB in the beginning and 11.1 GB in the end (delta: -11.0 GB). Peak memory consumption was 1.2 GB. Max. memory is 16.1 GB. [2021-08-25 20:14:16,682 INFO L168 Benchmark]: Witness Printer took 65.80 ms. Allocated memory is still 12.3 GB. Free memory was 11.1 GB in the beginning and 11.1 GB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-25 20:14:16,687 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 58.7 MB. Free memory was 41.0 MB in the beginning and 41.0 MB in the end (delta: 73.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 314.08 ms. Allocated memory is still 58.7 MB. Free memory was 37.6 MB in the beginning and 42.8 MB in the end (delta: -5.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 29.21 ms. Allocated memory is still 58.7 MB. Free memory was 42.6 MB in the beginning and 40.8 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 19.00 ms. Allocated memory is still 58.7 MB. Free memory was 40.8 MB in the beginning and 39.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 575.82 ms. Allocated memory was 58.7 MB in the beginning and 71.3 MB in the end (delta: 12.6 MB). Free memory was 39.6 MB in the beginning and 45.5 MB in the end (delta: -5.9 MB). Peak memory consumption was 18.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 17823.37 ms. Allocated memory was 71.3 MB in the beginning and 12.3 GB in the end (delta: 12.3 GB). Free memory was 44.9 MB in the beginning and 11.1 GB in the end (delta: -11.0 GB). Peak memory consumption was 1.2 GB. Max. memory is 16.1 GB. * Witness Printer took 65.80 ms. Allocated memory is still 12.3 GB. Free memory was 11.1 GB in the beginning and 11.1 GB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 191]: 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 1 procedures, 46 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 17769.0ms, OverallIterations: 33, TraceHistogramMax: 1, EmptinessCheckTime: 346.6ms, AutomataDifference: 7634.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 22.7ms, InitialAbstractionConstructionTime: 11.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 3231 SDtfs, 1629 SDslu, 2174 SDs, 0 SdLazy, 175 SolverSat, 33 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 246.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 99 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 99.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=105477occurred in iteration=32, InterpolantAutomatonStates: 99, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 8177.0ms AutomataMinimizationTime, 33 MinimizatonAttempts, 16418 StatesRemovedByMinimization, 32 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 4105 NumberOfFragments, 4 HoareAnnotationTreeSize, 4 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 6.5ms HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 3.1ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 60.0ms SsaConstructionTime, 261.3ms SatisfiabilityAnalysisTime, 862.7ms InterpolantComputationTime, 811 NumberOfCodeBlocks, 811 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 778 ConstructedInterpolants, 0 QuantifiedInterpolants, 1702 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 33 InterpolantComputations, 33 PerfectInterpolantSequences, 0/0 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: 6]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 47]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-08-25 20:14:16,726 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...