./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.1.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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/seq-mthreaded-reduced/pals_lcr.5.1.ufo.UNBOUNDED.pals.c.p+lhb-reducer.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 31d5f3a14d915ecc08c5dc9b9c0c33fc37690ec404e8b1546bed720bc4205a6b --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 01:30:57,878 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 01:30:57,880 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 01:30:57,910 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 01:30:57,910 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 01:30:57,913 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 01:30:57,914 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 01:30:57,917 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 01:30:57,919 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 01:30:57,922 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 01:30:57,923 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 01:30:57,925 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 01:30:57,925 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 01:30:57,927 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 01:30:57,928 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 01:30:57,930 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 01:30:57,931 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 01:30:57,931 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 01:30:57,933 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 01:30:57,935 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 01:30:57,936 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 01:30:57,951 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 01:30:57,952 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 01:30:57,953 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 01:30:57,960 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 01:30:57,961 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 01:30:57,961 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 01:30:57,962 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 01:30:57,962 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 01:30:57,963 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 01:30:57,963 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 01:30:57,964 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 01:30:57,965 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 01:30:57,965 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 01:30:57,966 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 01:30:57,966 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 01:30:57,967 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 01:30:57,967 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 01:30:57,967 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 01:30:57,968 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 01:30:57,969 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 01:30:57,969 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 01:30:58,011 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 01:30:58,011 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 01:30:58,012 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 01:30:58,012 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 01:30:58,013 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 01:30:58,013 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 01:30:58,014 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 01:30:58,014 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 01:30:58,014 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 01:30:58,014 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 01:30:58,015 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 01:30:58,015 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 01:30:58,015 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 01:30:58,015 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 01:30:58,015 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 01:30:58,016 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 01:30:58,016 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 01:30:58,016 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 01:30:58,016 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 01:30:58,016 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 01:30:58,016 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 01:30:58,016 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 01:30:58,017 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 01:30:58,017 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 01:30:58,017 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:30:58,017 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 01:30:58,017 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 01:30:58,017 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 01:30:58,017 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 01:30:58,018 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 01:30:58,018 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 01:30:58,018 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 01:30:58,018 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 01:30:58,018 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 31d5f3a14d915ecc08c5dc9b9c0c33fc37690ec404e8b1546bed720bc4205a6b [2021-12-28 01:30:58,256 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 01:30:58,272 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 01:30:58,273 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 01:30:58,274 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 01:30:58,276 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 01:30:58,277 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.1.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c [2021-12-28 01:30:58,315 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/838596e11/c50bb871c8684362bf706342842a97ce/FLAGc0cb502a0 [2021-12-28 01:30:58,728 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 01:30:58,729 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.1.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c [2021-12-28 01:30:58,738 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/838596e11/c50bb871c8684362bf706342842a97ce/FLAGc0cb502a0 [2021-12-28 01:30:59,066 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/838596e11/c50bb871c8684362bf706342842a97ce [2021-12-28 01:30:59,071 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 01:30:59,072 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 01:30:59,075 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 01:30:59,076 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 01:30:59,078 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 01:30:59,079 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:30:59" (1/1) ... [2021-12-28 01:30:59,082 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65bc0aa5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:30:59, skipping insertion in model container [2021-12-28 01:30:59,083 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:30:59" (1/1) ... [2021-12-28 01:30:59,087 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 01:30:59,133 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 01:30:59,398 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.1.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c[13904,13917] [2021-12-28 01:30:59,475 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:30:59,485 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 01:30:59,542 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.5.1.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c[13904,13917] [2021-12-28 01:30:59,576 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:30:59,587 INFO L208 MainTranslator]: Completed translation [2021-12-28 01:30:59,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:30:59 WrapperNode [2021-12-28 01:30:59,588 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 01:30:59,589 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 01:30:59,589 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 01:30:59,589 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 01:30:59,596 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:30:59" (1/1) ... [2021-12-28 01:30:59,611 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:30:59" (1/1) ... [2021-12-28 01:30:59,673 INFO L137 Inliner]: procedures = 25, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1189 [2021-12-28 01:30:59,673 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 01:30:59,674 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 01:30:59,674 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 01:30:59,674 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 01:30:59,680 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:30:59" (1/1) ... [2021-12-28 01:30:59,680 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:30:59" (1/1) ... [2021-12-28 01:30:59,697 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:30:59" (1/1) ... [2021-12-28 01:30:59,697 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:30:59" (1/1) ... [2021-12-28 01:30:59,706 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:30:59" (1/1) ... [2021-12-28 01:30:59,727 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:30:59" (1/1) ... [2021-12-28 01:30:59,729 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:30:59" (1/1) ... [2021-12-28 01:30:59,746 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 01:30:59,747 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 01:30:59,747 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 01:30:59,747 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 01:30:59,748 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:30:59" (1/1) ... [2021-12-28 01:30:59,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:30:59,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:30:59,792 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) [2021-12-28 01:30:59,827 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 [2021-12-28 01:30:59,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 01:30:59,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 01:30:59,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 01:30:59,850 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 01:30:59,991 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 01:30:59,993 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 01:31:00,698 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 01:31:00,710 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 01:31:00,710 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-28 01:31:00,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:31:00 BoogieIcfgContainer [2021-12-28 01:31:00,712 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 01:31:00,713 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 01:31:00,713 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 01:31:00,715 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 01:31:00,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 01:30:59" (1/3) ... [2021-12-28 01:31:00,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@249e3150 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:31:00, skipping insertion in model container [2021-12-28 01:31:00,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:30:59" (2/3) ... [2021-12-28 01:31:00,717 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@249e3150 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:31:00, skipping insertion in model container [2021-12-28 01:31:00,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:31:00" (3/3) ... [2021-12-28 01:31:00,717 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.1.ufo.UNBOUNDED.pals.c.p+lhb-reducer.c [2021-12-28 01:31:00,721 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 01:31:00,721 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 01:31:00,765 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 01:31:00,770 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, mAutomataTypeConcurrency=PETRI_NET, 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 [2021-12-28 01:31:00,770 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-28 01:31:00,791 INFO L276 IsEmpty]: Start isEmpty. Operand has 336 states, 334 states have (on average 1.652694610778443) internal successors, (552), 335 states have internal predecessors, (552), 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) [2021-12-28 01:31:00,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-28 01:31:00,801 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:31:00,802 INFO L514 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:31:00,802 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:31:00,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:31:00,806 INFO L85 PathProgramCache]: Analyzing trace with hash 507379928, now seen corresponding path program 1 times [2021-12-28 01:31:00,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:31:00,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463194341] [2021-12-28 01:31:00,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:31:00,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:31:00,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:31:01,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:31:01,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:31:01,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463194341] [2021-12-28 01:31:01,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463194341] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:31:01,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:31:01,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:31:01,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329706722] [2021-12-28 01:31:01,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:31:01,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:31:01,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:31:01,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:31:01,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 01:31:01,025 INFO L87 Difference]: Start difference. First operand has 336 states, 334 states have (on average 1.652694610778443) internal successors, (552), 335 states have internal predecessors, (552), 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 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 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) [2021-12-28 01:31:01,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:31:01,119 INFO L93 Difference]: Finished difference Result 642 states and 1042 transitions. [2021-12-28 01:31:01,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:31:01,121 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 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 127 [2021-12-28 01:31:01,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:31:01,130 INFO L225 Difference]: With dead ends: 642 [2021-12-28 01:31:01,130 INFO L226 Difference]: Without dead ends: 333 [2021-12-28 01:31:01,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:31:01,135 INFO L933 BasicCegarLoop]: 549 mSDtfsCounter, 491 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 1129 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:31:01,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [491 Valid, 1129 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:31:01,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-12-28 01:31:01,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 333. [2021-12-28 01:31:01,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 1.5451807228915662) internal successors, (513), 332 states have internal predecessors, (513), 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) [2021-12-28 01:31:01,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 513 transitions. [2021-12-28 01:31:01,174 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 513 transitions. Word has length 127 [2021-12-28 01:31:01,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:31:01,174 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 513 transitions. [2021-12-28 01:31:01,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 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) [2021-12-28 01:31:01,175 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 513 transitions. [2021-12-28 01:31:01,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-28 01:31:01,178 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:31:01,178 INFO L514 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:31:01,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 01:31:01,178 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:31:01,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:31:01,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1226582684, now seen corresponding path program 1 times [2021-12-28 01:31:01,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:31:01,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973927686] [2021-12-28 01:31:01,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:31:01,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:31:01,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:31:01,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:31:01,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:31:01,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973927686] [2021-12-28 01:31:01,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973927686] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:31:01,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:31:01,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:31:01,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053792628] [2021-12-28 01:31:01,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:31:01,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:31:01,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:31:01,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:31:01,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:31:01,347 INFO L87 Difference]: Start difference. First operand 333 states and 513 transitions. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 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) [2021-12-28 01:31:01,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:31:01,424 INFO L93 Difference]: Finished difference Result 804 states and 1267 transitions. [2021-12-28 01:31:01,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:31:01,425 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 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 157 [2021-12-28 01:31:01,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:31:01,428 INFO L225 Difference]: With dead ends: 804 [2021-12-28 01:31:01,428 INFO L226 Difference]: Without dead ends: 523 [2021-12-28 01:31:01,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:31:01,430 INFO L933 BasicCegarLoop]: 582 mSDtfsCounter, 346 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 998 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:31:01,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 998 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:31:01,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-12-28 01:31:01,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 521. [2021-12-28 01:31:01,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 520 states have (on average 1.5596153846153846) internal successors, (811), 520 states have internal predecessors, (811), 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) [2021-12-28 01:31:01,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 811 transitions. [2021-12-28 01:31:01,470 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 811 transitions. Word has length 157 [2021-12-28 01:31:01,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:31:01,471 INFO L470 AbstractCegarLoop]: Abstraction has 521 states and 811 transitions. [2021-12-28 01:31:01,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 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) [2021-12-28 01:31:01,472 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 811 transitions. [2021-12-28 01:31:01,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-28 01:31:01,479 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:31:01,480 INFO L514 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:31:01,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 01:31:01,481 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:31:01,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:31:01,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1375467905, now seen corresponding path program 1 times [2021-12-28 01:31:01,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:31:01,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515926504] [2021-12-28 01:31:01,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:31:01,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:31:01,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:31:01,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:31:01,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:31:01,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515926504] [2021-12-28 01:31:01,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515926504] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:31:01,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:31:01,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:31:01,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922950905] [2021-12-28 01:31:01,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:31:01,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:31:01,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:31:01,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:31:01,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:31:01,573 INFO L87 Difference]: Start difference. First operand 521 states and 811 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 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) [2021-12-28 01:31:01,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:31:01,636 INFO L93 Difference]: Finished difference Result 1322 states and 2090 transitions. [2021-12-28 01:31:01,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:31:01,637 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 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 160 [2021-12-28 01:31:01,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:31:01,640 INFO L225 Difference]: With dead ends: 1322 [2021-12-28 01:31:01,640 INFO L226 Difference]: Without dead ends: 859 [2021-12-28 01:31:01,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:31:01,643 INFO L933 BasicCegarLoop]: 493 mSDtfsCounter, 334 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 897 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:31:01,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 897 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:31:01,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2021-12-28 01:31:01,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 857. [2021-12-28 01:31:01,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 1.566588785046729) internal successors, (1341), 856 states have internal predecessors, (1341), 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) [2021-12-28 01:31:01,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 1341 transitions. [2021-12-28 01:31:01,676 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 1341 transitions. Word has length 160 [2021-12-28 01:31:01,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:31:01,676 INFO L470 AbstractCegarLoop]: Abstraction has 857 states and 1341 transitions. [2021-12-28 01:31:01,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 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) [2021-12-28 01:31:01,676 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 1341 transitions. [2021-12-28 01:31:01,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-28 01:31:01,678 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:31:01,679 INFO L514 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:31:01,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 01:31:01,679 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:31:01,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:31:01,680 INFO L85 PathProgramCache]: Analyzing trace with hash -401831765, now seen corresponding path program 1 times [2021-12-28 01:31:01,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:31:01,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089982930] [2021-12-28 01:31:01,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:31:01,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:31:01,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:31:01,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:31:01,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:31:01,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089982930] [2021-12-28 01:31:01,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089982930] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:31:01,730 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:31:01,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:31:01,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876935679] [2021-12-28 01:31:01,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:31:01,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:31:01,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:31:01,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:31:01,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:31:01,732 INFO L87 Difference]: Start difference. First operand 857 states and 1341 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 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) [2021-12-28 01:31:01,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:31:01,819 INFO L93 Difference]: Finished difference Result 2240 states and 3538 transitions. [2021-12-28 01:31:01,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:31:01,820 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 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 163 [2021-12-28 01:31:01,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:31:01,827 INFO L225 Difference]: With dead ends: 2240 [2021-12-28 01:31:01,828 INFO L226 Difference]: Without dead ends: 1447 [2021-12-28 01:31:01,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:31:01,835 INFO L933 BasicCegarLoop]: 597 mSDtfsCounter, 320 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 989 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:31:01,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 989 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:31:01,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1447 states. [2021-12-28 01:31:01,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1447 to 1445. [2021-12-28 01:31:01,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1445 states, 1444 states have (on average 1.5657894736842106) internal successors, (2261), 1444 states have internal predecessors, (2261), 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) [2021-12-28 01:31:01,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1445 states to 1445 states and 2261 transitions. [2021-12-28 01:31:01,901 INFO L78 Accepts]: Start accepts. Automaton has 1445 states and 2261 transitions. Word has length 163 [2021-12-28 01:31:01,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:31:01,902 INFO L470 AbstractCegarLoop]: Abstraction has 1445 states and 2261 transitions. [2021-12-28 01:31:01,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 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) [2021-12-28 01:31:01,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1445 states and 2261 transitions. [2021-12-28 01:31:01,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-28 01:31:01,905 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:31:01,905 INFO L514 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:31:01,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 01:31:01,905 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:31:01,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:31:01,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1333810302, now seen corresponding path program 1 times [2021-12-28 01:31:01,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:31:01,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583830967] [2021-12-28 01:31:01,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:31:01,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:31:01,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:31:01,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:31:01,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:31:01,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583830967] [2021-12-28 01:31:01,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583830967] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:31:01,962 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:31:01,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:31:01,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207288501] [2021-12-28 01:31:01,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:31:01,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:31:01,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:31:01,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:31:01,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:31:01,965 INFO L87 Difference]: Start difference. First operand 1445 states and 2261 transitions. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 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) [2021-12-28 01:31:02,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:31:02,088 INFO L93 Difference]: Finished difference Result 3826 states and 6014 transitions. [2021-12-28 01:31:02,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:31:02,089 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 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 166 [2021-12-28 01:31:02,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:31:02,096 INFO L225 Difference]: With dead ends: 3826 [2021-12-28 01:31:02,096 INFO L226 Difference]: Without dead ends: 2451 [2021-12-28 01:31:02,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:31:02,099 INFO L933 BasicCegarLoop]: 477 mSDtfsCounter, 308 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 857 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:31:02,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 857 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:31:02,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2451 states. [2021-12-28 01:31:02,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2451 to 2449. [2021-12-28 01:31:02,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2449 states, 2448 states have (on average 1.5575980392156863) internal successors, (3813), 2448 states have internal predecessors, (3813), 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) [2021-12-28 01:31:02,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2449 states to 2449 states and 3813 transitions. [2021-12-28 01:31:02,215 INFO L78 Accepts]: Start accepts. Automaton has 2449 states and 3813 transitions. Word has length 166 [2021-12-28 01:31:02,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:31:02,216 INFO L470 AbstractCegarLoop]: Abstraction has 2449 states and 3813 transitions. [2021-12-28 01:31:02,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 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) [2021-12-28 01:31:02,216 INFO L276 IsEmpty]: Start isEmpty. Operand 2449 states and 3813 transitions. [2021-12-28 01:31:02,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-12-28 01:31:02,220 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:31:02,220 INFO L514 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:31:02,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 01:31:02,221 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:31:02,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:31:02,221 INFO L85 PathProgramCache]: Analyzing trace with hash -109197312, now seen corresponding path program 1 times [2021-12-28 01:31:02,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:31:02,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328664389] [2021-12-28 01:31:02,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:31:02,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:31:02,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:31:02,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:31:02,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:31:02,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328664389] [2021-12-28 01:31:02,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328664389] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:31:02,292 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:31:02,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:31:02,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816736533] [2021-12-28 01:31:02,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:31:02,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:31:02,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:31:02,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:31:02,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:31:02,293 INFO L87 Difference]: Start difference. First operand 2449 states and 3813 transitions. Second operand has 7 states, 7 states have (on average 24.142857142857142) internal successors, (169), 7 states have internal predecessors, (169), 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) [2021-12-28 01:31:03,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:31:03,699 INFO L93 Difference]: Finished difference Result 22976 states and 35818 transitions. [2021-12-28 01:31:03,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-28 01:31:03,699 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.142857142857142) internal successors, (169), 7 states have internal predecessors, (169), 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 169 [2021-12-28 01:31:03,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:31:03,762 INFO L225 Difference]: With dead ends: 22976 [2021-12-28 01:31:03,762 INFO L226 Difference]: Without dead ends: 20603 [2021-12-28 01:31:03,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-12-28 01:31:03,772 INFO L933 BasicCegarLoop]: 1654 mSDtfsCounter, 3286 mSDsluCounter, 7225 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3286 SdHoareTripleChecker+Valid, 8879 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 01:31:03,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3286 Valid, 8879 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 818 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 01:31:03,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20603 states. [2021-12-28 01:31:04,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20603 to 4851. [2021-12-28 01:31:04,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4851 states, 4850 states have (on average 1.534639175257732) internal successors, (7443), 4850 states have internal predecessors, (7443), 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) [2021-12-28 01:31:04,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4851 states to 4851 states and 7443 transitions. [2021-12-28 01:31:04,302 INFO L78 Accepts]: Start accepts. Automaton has 4851 states and 7443 transitions. Word has length 169 [2021-12-28 01:31:04,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:31:04,302 INFO L470 AbstractCegarLoop]: Abstraction has 4851 states and 7443 transitions. [2021-12-28 01:31:04,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.142857142857142) internal successors, (169), 7 states have internal predecessors, (169), 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) [2021-12-28 01:31:04,303 INFO L276 IsEmpty]: Start isEmpty. Operand 4851 states and 7443 transitions. [2021-12-28 01:31:04,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-12-28 01:31:04,311 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:31:04,311 INFO L514 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:31:04,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 01:31:04,311 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:31:04,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:31:04,312 INFO L85 PathProgramCache]: Analyzing trace with hash -685585935, now seen corresponding path program 1 times [2021-12-28 01:31:04,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:31:04,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726531532] [2021-12-28 01:31:04,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:31:04,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:31:04,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:31:04,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:31:04,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:31:04,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726531532] [2021-12-28 01:31:04,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726531532] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:31:04,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:31:04,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:31:04,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88955502] [2021-12-28 01:31:04,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:31:04,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:31:04,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:31:04,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:31:04,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:31:04,363 INFO L87 Difference]: Start difference. First operand 4851 states and 7443 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 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) [2021-12-28 01:31:04,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:31:04,915 INFO L93 Difference]: Finished difference Result 13321 states and 20415 transitions. [2021-12-28 01:31:04,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:31:04,915 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 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 172 [2021-12-28 01:31:04,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:31:04,934 INFO L225 Difference]: With dead ends: 13321 [2021-12-28 01:31:04,935 INFO L226 Difference]: Without dead ends: 8510 [2021-12-28 01:31:04,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:31:04,944 INFO L933 BasicCegarLoop]: 778 mSDtfsCounter, 337 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 1172 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:31:04,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 1172 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:31:04,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8510 states. [2021-12-28 01:31:05,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8510 to 8508. [2021-12-28 01:31:05,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8508 states, 8507 states have (on average 1.5183966145527212) internal successors, (12917), 8507 states have internal predecessors, (12917), 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) [2021-12-28 01:31:05,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8508 states to 8508 states and 12917 transitions. [2021-12-28 01:31:05,502 INFO L78 Accepts]: Start accepts. Automaton has 8508 states and 12917 transitions. Word has length 172 [2021-12-28 01:31:05,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:31:05,502 INFO L470 AbstractCegarLoop]: Abstraction has 8508 states and 12917 transitions. [2021-12-28 01:31:05,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 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) [2021-12-28 01:31:05,503 INFO L276 IsEmpty]: Start isEmpty. Operand 8508 states and 12917 transitions. [2021-12-28 01:31:05,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-12-28 01:31:05,516 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:31:05,516 INFO L514 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:31:05,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-28 01:31:05,517 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:31:05,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:31:05,517 INFO L85 PathProgramCache]: Analyzing trace with hash 443804160, now seen corresponding path program 1 times [2021-12-28 01:31:05,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:31:05,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70150179] [2021-12-28 01:31:05,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:31:05,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:31:05,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:31:05,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:31:05,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:31:05,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70150179] [2021-12-28 01:31:05,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70150179] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:31:05,554 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:31:05,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:31:05,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474799684] [2021-12-28 01:31:05,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:31:05,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:31:05,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:31:05,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:31:05,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:31:05,555 INFO L87 Difference]: Start difference. First operand 8508 states and 12917 transitions. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 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) [2021-12-28 01:31:06,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:31:06,484 INFO L93 Difference]: Finished difference Result 20430 states and 30991 transitions. [2021-12-28 01:31:06,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:31:06,484 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 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 173 [2021-12-28 01:31:06,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:31:06,506 INFO L225 Difference]: With dead ends: 20430 [2021-12-28 01:31:06,506 INFO L226 Difference]: Without dead ends: 11990 [2021-12-28 01:31:06,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:31:06,520 INFO L933 BasicCegarLoop]: 448 mSDtfsCounter, 352 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 794 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:31:06,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 794 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:31:06,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11990 states. [2021-12-28 01:31:07,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11990 to 11924. [2021-12-28 01:31:07,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11924 states, 11923 states have (on average 1.4929128575023065) internal successors, (17800), 11923 states have internal predecessors, (17800), 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) [2021-12-28 01:31:07,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11924 states to 11924 states and 17800 transitions. [2021-12-28 01:31:07,275 INFO L78 Accepts]: Start accepts. Automaton has 11924 states and 17800 transitions. Word has length 173 [2021-12-28 01:31:07,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:31:07,275 INFO L470 AbstractCegarLoop]: Abstraction has 11924 states and 17800 transitions. [2021-12-28 01:31:07,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 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) [2021-12-28 01:31:07,276 INFO L276 IsEmpty]: Start isEmpty. Operand 11924 states and 17800 transitions. [2021-12-28 01:31:07,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-12-28 01:31:07,295 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:31:07,295 INFO L514 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:31:07,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-28 01:31:07,295 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:31:07,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:31:07,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1404207551, now seen corresponding path program 1 times [2021-12-28 01:31:07,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:31:07,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316882084] [2021-12-28 01:31:07,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:31:07,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:31:07,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:31:07,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:31:07,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:31:07,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316882084] [2021-12-28 01:31:07,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316882084] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:31:07,441 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:31:07,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:31:07,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643446795] [2021-12-28 01:31:07,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:31:07,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:31:07,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:31:07,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:31:07,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:31:07,443 INFO L87 Difference]: Start difference. First operand 11924 states and 17800 transitions. Second operand has 7 states, 7 states have (on average 24.714285714285715) internal successors, (173), 7 states have internal predecessors, (173), 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) [2021-12-28 01:31:08,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:31:08,421 INFO L93 Difference]: Finished difference Result 23781 states and 35521 transitions. [2021-12-28 01:31:08,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 01:31:08,422 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.714285714285715) internal successors, (173), 7 states have internal predecessors, (173), 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 173 [2021-12-28 01:31:08,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:31:08,442 INFO L225 Difference]: With dead ends: 23781 [2021-12-28 01:31:08,442 INFO L226 Difference]: Without dead ends: 11926 [2021-12-28 01:31:08,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-12-28 01:31:08,456 INFO L933 BasicCegarLoop]: 724 mSDtfsCounter, 557 mSDsluCounter, 1650 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 2374 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 01:31:08,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [557 Valid, 2374 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 01:31:08,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11926 states. [2021-12-28 01:31:09,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11926 to 11924. [2021-12-28 01:31:09,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11924 states, 11923 states have (on average 1.478067600436132) internal successors, (17623), 11923 states have internal predecessors, (17623), 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) [2021-12-28 01:31:09,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11924 states to 11924 states and 17623 transitions. [2021-12-28 01:31:09,371 INFO L78 Accepts]: Start accepts. Automaton has 11924 states and 17623 transitions. Word has length 173 [2021-12-28 01:31:09,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:31:09,371 INFO L470 AbstractCegarLoop]: Abstraction has 11924 states and 17623 transitions. [2021-12-28 01:31:09,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.714285714285715) internal successors, (173), 7 states have internal predecessors, (173), 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) [2021-12-28 01:31:09,372 INFO L276 IsEmpty]: Start isEmpty. Operand 11924 states and 17623 transitions. [2021-12-28 01:31:09,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-12-28 01:31:09,391 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:31:09,392 INFO L514 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:31:09,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-28 01:31:09,392 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:31:09,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:31:09,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1620734737, now seen corresponding path program 1 times [2021-12-28 01:31:09,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:31:09,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505752140] [2021-12-28 01:31:09,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:31:09,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:31:09,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:31:09,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:31:09,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:31:09,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505752140] [2021-12-28 01:31:09,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505752140] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:31:09,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:31:09,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:31:09,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295912009] [2021-12-28 01:31:09,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:31:09,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:31:09,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:31:09,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:31:09,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:31:09,496 INFO L87 Difference]: Start difference. First operand 11924 states and 17623 transitions. Second operand has 7 states, 7 states have (on average 24.857142857142858) internal successors, (174), 7 states have internal predecessors, (174), 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) [2021-12-28 01:31:13,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:31:13,311 INFO L93 Difference]: Finished difference Result 60589 states and 89352 transitions. [2021-12-28 01:31:13,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 01:31:13,311 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.857142857142858) internal successors, (174), 7 states have internal predecessors, (174), 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 174 [2021-12-28 01:31:13,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:31:13,408 INFO L225 Difference]: With dead ends: 60589 [2021-12-28 01:31:13,408 INFO L226 Difference]: Without dead ends: 52435 [2021-12-28 01:31:13,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-28 01:31:13,425 INFO L933 BasicCegarLoop]: 1158 mSDtfsCounter, 2624 mSDsluCounter, 2056 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2624 SdHoareTripleChecker+Valid, 3214 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 01:31:13,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2624 Valid, 3214 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 01:31:13,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52435 states. [2021-12-28 01:31:15,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52435 to 22673. [2021-12-28 01:31:15,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22673 states, 22672 states have (on average 1.4693895553987297) internal successors, (33314), 22672 states have internal predecessors, (33314), 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) [2021-12-28 01:31:15,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22673 states to 22673 states and 33314 transitions. [2021-12-28 01:31:15,738 INFO L78 Accepts]: Start accepts. Automaton has 22673 states and 33314 transitions. Word has length 174 [2021-12-28 01:31:15,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:31:15,738 INFO L470 AbstractCegarLoop]: Abstraction has 22673 states and 33314 transitions. [2021-12-28 01:31:15,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.857142857142858) internal successors, (174), 7 states have internal predecessors, (174), 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) [2021-12-28 01:31:15,738 INFO L276 IsEmpty]: Start isEmpty. Operand 22673 states and 33314 transitions. [2021-12-28 01:31:15,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-12-28 01:31:15,787 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:31:15,787 INFO L514 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:31:15,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-28 01:31:15,788 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:31:15,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:31:15,788 INFO L85 PathProgramCache]: Analyzing trace with hash -490509957, now seen corresponding path program 1 times [2021-12-28 01:31:15,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:31:15,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915132283] [2021-12-28 01:31:15,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:31:15,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:31:15,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:31:15,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:31:15,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:31:15,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915132283] [2021-12-28 01:31:15,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915132283] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:31:15,896 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:31:15,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:31:15,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793851435] [2021-12-28 01:31:15,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:31:15,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:31:15,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:31:15,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:31:15,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:31:15,898 INFO L87 Difference]: Start difference. First operand 22673 states and 33314 transitions. Second operand has 7 states, 7 states have (on average 24.857142857142858) internal successors, (174), 7 states have internal predecessors, (174), 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) [2021-12-28 01:31:21,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:31:21,303 INFO L93 Difference]: Finished difference Result 70007 states and 103072 transitions. [2021-12-28 01:31:21,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 01:31:21,304 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.857142857142858) internal successors, (174), 7 states have internal predecessors, (174), 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 174 [2021-12-28 01:31:21,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:31:21,444 INFO L225 Difference]: With dead ends: 70007 [2021-12-28 01:31:21,444 INFO L226 Difference]: Without dead ends: 62285 [2021-12-28 01:31:21,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-28 01:31:21,479 INFO L933 BasicCegarLoop]: 1110 mSDtfsCounter, 2616 mSDsluCounter, 2620 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2616 SdHoareTripleChecker+Valid, 3730 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 01:31:21,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2616 Valid, 3730 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 01:31:21,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62285 states. [2021-12-28 01:31:24,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62285 to 36813. [2021-12-28 01:31:24,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36813 states, 36812 states have (on average 1.4612354666956426) internal successors, (53791), 36812 states have internal predecessors, (53791), 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) [2021-12-28 01:31:24,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36813 states to 36813 states and 53791 transitions. [2021-12-28 01:31:24,890 INFO L78 Accepts]: Start accepts. Automaton has 36813 states and 53791 transitions. Word has length 174 [2021-12-28 01:31:24,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:31:24,890 INFO L470 AbstractCegarLoop]: Abstraction has 36813 states and 53791 transitions. [2021-12-28 01:31:24,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.857142857142858) internal successors, (174), 7 states have internal predecessors, (174), 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) [2021-12-28 01:31:24,891 INFO L276 IsEmpty]: Start isEmpty. Operand 36813 states and 53791 transitions. [2021-12-28 01:31:24,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-12-28 01:31:24,977 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:31:24,977 INFO L514 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:31:24,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-28 01:31:24,978 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:31:24,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:31:24,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1276981041, now seen corresponding path program 1 times [2021-12-28 01:31:24,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:31:24,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467431146] [2021-12-28 01:31:24,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:31:24,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:31:25,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:31:25,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:31:25,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:31:25,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467431146] [2021-12-28 01:31:25,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467431146] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:31:25,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:31:25,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:31:25,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645709711] [2021-12-28 01:31:25,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:31:25,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:31:25,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:31:25,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:31:25,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:31:25,176 INFO L87 Difference]: Start difference. First operand 36813 states and 53791 transitions. Second operand has 7 states, 7 states have (on average 24.857142857142858) internal successors, (174), 7 states have internal predecessors, (174), 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) [2021-12-28 01:31:31,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:31:31,690 INFO L93 Difference]: Finished difference Result 78927 states and 116048 transitions. [2021-12-28 01:31:31,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 01:31:31,690 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.857142857142858) internal successors, (174), 7 states have internal predecessors, (174), 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 174 [2021-12-28 01:31:31,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:31:31,808 INFO L225 Difference]: With dead ends: 78927 [2021-12-28 01:31:31,808 INFO L226 Difference]: Without dead ends: 71061 [2021-12-28 01:31:31,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-28 01:31:31,832 INFO L933 BasicCegarLoop]: 1167 mSDtfsCounter, 2432 mSDsluCounter, 2779 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2432 SdHoareTripleChecker+Valid, 3946 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 01:31:31,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2432 Valid, 3946 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 01:31:31,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71061 states. [2021-12-28 01:31:36,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71061 to 46464. [2021-12-28 01:31:36,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46464 states, 46463 states have (on average 1.4605384929944256) internal successors, (67861), 46463 states have internal predecessors, (67861), 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) [2021-12-28 01:31:36,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46464 states to 46464 states and 67861 transitions. [2021-12-28 01:31:36,399 INFO L78 Accepts]: Start accepts. Automaton has 46464 states and 67861 transitions. Word has length 174 [2021-12-28 01:31:36,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:31:36,399 INFO L470 AbstractCegarLoop]: Abstraction has 46464 states and 67861 transitions. [2021-12-28 01:31:36,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.857142857142858) internal successors, (174), 7 states have internal predecessors, (174), 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) [2021-12-28 01:31:36,400 INFO L276 IsEmpty]: Start isEmpty. Operand 46464 states and 67861 transitions. [2021-12-28 01:31:36,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-12-28 01:31:36,462 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:31:36,462 INFO L514 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:31:36,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-28 01:31:36,462 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:31:36,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:31:36,463 INFO L85 PathProgramCache]: Analyzing trace with hash 815173252, now seen corresponding path program 1 times [2021-12-28 01:31:36,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:31:36,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821110810] [2021-12-28 01:31:36,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:31:36,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:31:36,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:31:36,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:31:36,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:31:36,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821110810] [2021-12-28 01:31:36,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821110810] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:31:36,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:31:36,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:31:36,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798827891] [2021-12-28 01:31:36,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:31:36,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:31:36,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:31:36,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:31:36,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:31:36,544 INFO L87 Difference]: Start difference. First operand 46464 states and 67861 transitions. Second operand has 7 states, 7 states have (on average 24.857142857142858) internal successors, (174), 7 states have internal predecessors, (174), 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) [2021-12-28 01:31:44,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:31:44,073 INFO L93 Difference]: Finished difference Result 88515 states and 130020 transitions. [2021-12-28 01:31:44,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 01:31:44,074 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.857142857142858) internal successors, (174), 7 states have internal predecessors, (174), 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 174 [2021-12-28 01:31:44,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:31:44,198 INFO L225 Difference]: With dead ends: 88515 [2021-12-28 01:31:44,198 INFO L226 Difference]: Without dead ends: 80505 [2021-12-28 01:31:44,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-28 01:31:44,229 INFO L933 BasicCegarLoop]: 1394 mSDtfsCounter, 2514 mSDsluCounter, 3755 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2514 SdHoareTripleChecker+Valid, 5149 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 01:31:44,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2514 Valid, 5149 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 01:31:44,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80505 states. [2021-12-28 01:31:50,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80505 to 56286. [2021-12-28 01:31:50,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56286 states, 56285 states have (on average 1.4602824908945544) internal successors, (82192), 56285 states have internal predecessors, (82192), 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) [2021-12-28 01:31:50,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56286 states to 56286 states and 82192 transitions. [2021-12-28 01:31:50,183 INFO L78 Accepts]: Start accepts. Automaton has 56286 states and 82192 transitions. Word has length 174 [2021-12-28 01:31:50,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:31:50,183 INFO L470 AbstractCegarLoop]: Abstraction has 56286 states and 82192 transitions. [2021-12-28 01:31:50,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.857142857142858) internal successors, (174), 7 states have internal predecessors, (174), 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) [2021-12-28 01:31:50,184 INFO L276 IsEmpty]: Start isEmpty. Operand 56286 states and 82192 transitions. [2021-12-28 01:31:50,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-12-28 01:31:50,290 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:31:50,290 INFO L514 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, 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, 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, 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, 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, 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] [2021-12-28 01:31:50,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-28 01:31:50,290 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:31:50,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:31:50,291 INFO L85 PathProgramCache]: Analyzing trace with hash 773645085, now seen corresponding path program 1 times [2021-12-28 01:31:50,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:31:50,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030358671] [2021-12-28 01:31:50,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:31:50,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:31:50,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:31:50,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:31:50,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:31:50,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030358671] [2021-12-28 01:31:50,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030358671] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:31:50,375 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:31:50,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:31:50,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976100750] [2021-12-28 01:31:50,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:31:50,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:31:50,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:31:50,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:31:50,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:31:50,376 INFO L87 Difference]: Start difference. First operand 56286 states and 82192 transitions. Second operand has 7 states, 7 states have (on average 25.0) internal successors, (175), 7 states have internal predecessors, (175), 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) [2021-12-28 01:31:59,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:31:59,425 INFO L93 Difference]: Finished difference Result 93088 states and 136880 transitions. [2021-12-28 01:31:59,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 01:31:59,426 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.0) internal successors, (175), 7 states have internal predecessors, (175), 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 175 [2021-12-28 01:31:59,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:31:59,568 INFO L225 Difference]: With dead ends: 93088 [2021-12-28 01:31:59,569 INFO L226 Difference]: Without dead ends: 87454 [2021-12-28 01:31:59,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-28 01:31:59,600 INFO L933 BasicCegarLoop]: 1335 mSDtfsCounter, 2688 mSDsluCounter, 3042 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2688 SdHoareTripleChecker+Valid, 4377 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 01:31:59,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2688 Valid, 4377 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 01:31:59,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87454 states. [2021-12-28 01:32:07,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87454 to 63235. [2021-12-28 01:32:07,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63235 states, 63234 states have (on average 1.4628206344687984) internal successors, (92500), 63234 states have internal predecessors, (92500), 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) [2021-12-28 01:32:07,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63235 states to 63235 states and 92500 transitions. [2021-12-28 01:32:07,502 INFO L78 Accepts]: Start accepts. Automaton has 63235 states and 92500 transitions. Word has length 175 [2021-12-28 01:32:07,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:32:07,502 INFO L470 AbstractCegarLoop]: Abstraction has 63235 states and 92500 transitions. [2021-12-28 01:32:07,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.0) internal successors, (175), 7 states have internal predecessors, (175), 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) [2021-12-28 01:32:07,503 INFO L276 IsEmpty]: Start isEmpty. Operand 63235 states and 92500 transitions. [2021-12-28 01:32:07,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-12-28 01:32:07,586 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:32:07,586 INFO L514 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, 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, 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, 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, 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, 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] [2021-12-28 01:32:07,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-28 01:32:07,587 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:32:07,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:32:07,587 INFO L85 PathProgramCache]: Analyzing trace with hash -153189903, now seen corresponding path program 1 times [2021-12-28 01:32:07,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:32:07,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289582066] [2021-12-28 01:32:07,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:32:07,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:32:07,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:32:07,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:32:07,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:32:07,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289582066] [2021-12-28 01:32:07,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289582066] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:32:07,625 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:32:07,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:32:07,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483087612] [2021-12-28 01:32:07,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:32:07,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:32:07,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:32:07,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:32:07,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:32:07,626 INFO L87 Difference]: Start difference. First operand 63235 states and 92500 transitions. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 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)