./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+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 d7923672572112c1e23e765d37ba0d9265e37954a51bbbf4393296aaafd9ce3e --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 15:12:53,239 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 15:12:53,262 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 15:12:53,288 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 15:12:53,288 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 15:12:53,291 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 15:12:53,293 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 15:12:53,299 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 15:12:53,301 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 15:12:53,301 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 15:12:53,302 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 15:12:53,303 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 15:12:53,303 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 15:12:53,305 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 15:12:53,307 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 15:12:53,308 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 15:12:53,311 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 15:12:53,311 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 15:12:53,315 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 15:12:53,316 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 15:12:53,319 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 15:12:53,320 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 15:12:53,321 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 15:12:53,321 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 15:12:53,323 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 15:12:53,325 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 15:12:53,326 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 15:12:53,326 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 15:12:53,327 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 15:12:53,328 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 15:12:53,328 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 15:12:53,329 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 15:12:53,329 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 15:12:53,330 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 15:12:53,331 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 15:12:53,331 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 15:12:53,332 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 15:12:53,332 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 15:12:53,332 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 15:12:53,333 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 15:12:53,333 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 15:12:53,335 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 15:12:53,355 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 15:12:53,355 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 15:12:53,356 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 15:12:53,356 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 15:12:53,357 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 15:12:53,357 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 15:12:53,357 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 15:12:53,357 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 15:12:53,358 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 15:12:53,358 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 15:12:53,358 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 15:12:53,359 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 15:12:53,359 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 15:12:53,359 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 15:12:53,359 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 15:12:53,359 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 15:12:53,359 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 15:12:53,360 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 15:12:53,360 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 15:12:53,360 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 15:12:53,360 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 15:12:53,360 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 15:12:53,360 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 15:12:53,361 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 15:12:53,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 15:12:53,361 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 15:12:53,361 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 15:12:53,361 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 15:12:53,361 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 15:12:53,362 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 15:12:53,362 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 15:12:53,362 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 15:12:53,362 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 15:12:53,362 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 15:12:53,362 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d7923672572112c1e23e765d37ba0d9265e37954a51bbbf4393296aaafd9ce3e [2021-12-14 15:12:53,573 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 15:12:53,590 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 15:12:53,592 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 15:12:53,592 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 15:12:53,607 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 15:12:53,608 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-12-14 15:12:53,656 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee5111f01/b9248021e4b847e8a73c2f15a2385aa2/FLAGa4f43decf [2021-12-14 15:12:54,119 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 15:12:54,120 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-12-14 15:12:54,138 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee5111f01/b9248021e4b847e8a73c2f15a2385aa2/FLAGa4f43decf [2021-12-14 15:12:54,147 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee5111f01/b9248021e4b847e8a73c2f15a2385aa2 [2021-12-14 15:12:54,151 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 15:12:54,152 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 15:12:54,153 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 15:12:54,153 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 15:12:54,155 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 15:12:54,156 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:12:54" (1/1) ... [2021-12-14 15:12:54,156 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d998f4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:54, skipping insertion in model container [2021-12-14 15:12:54,157 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:12:54" (1/1) ... [2021-12-14 15:12:54,161 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 15:12:54,218 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 15:12:54,426 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-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[9988,10001] [2021-12-14 15:12:54,478 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-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[24517,24530] [2021-12-14 15:12:54,667 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 15:12:54,677 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 15:12:54,731 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-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[9988,10001] [2021-12-14 15:12:54,764 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-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c[24517,24530] [2021-12-14 15:12:54,829 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 15:12:54,844 INFO L208 MainTranslator]: Completed translation [2021-12-14 15:12:54,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:54 WrapperNode [2021-12-14 15:12:54,845 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 15:12:54,846 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 15:12:54,846 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 15:12:54,846 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 15:12:54,851 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:54" (1/1) ... [2021-12-14 15:12:54,885 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:54" (1/1) ... [2021-12-14 15:12:54,944 INFO L137 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 3378 [2021-12-14 15:12:54,955 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 15:12:54,956 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 15:12:54,956 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 15:12:54,956 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 15:12:54,962 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:54" (1/1) ... [2021-12-14 15:12:54,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:54" (1/1) ... [2021-12-14 15:12:54,970 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:54" (1/1) ... [2021-12-14 15:12:54,971 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:54" (1/1) ... [2021-12-14 15:12:54,997 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:54" (1/1) ... [2021-12-14 15:12:55,011 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:54" (1/1) ... [2021-12-14 15:12:55,023 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:54" (1/1) ... [2021-12-14 15:12:55,038 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 15:12:55,039 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 15:12:55,039 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 15:12:55,039 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 15:12:55,041 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:54" (1/1) ... [2021-12-14 15:12:55,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 15:12:55,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:12:55,113 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) [2021-12-14 15:12:55,143 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 [2021-12-14 15:12:55,155 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 15:12:55,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 15:12:55,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 15:12:55,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 15:12:55,373 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 15:12:55,374 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 15:12:56,536 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 15:12:56,547 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 15:12:56,547 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-14 15:12:56,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:12:56 BoogieIcfgContainer [2021-12-14 15:12:56,549 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 15:12:56,551 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 15:12:56,551 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 15:12:56,553 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 15:12:56,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:12:54" (1/3) ... [2021-12-14 15:12:56,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@922ca43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:12:56, skipping insertion in model container [2021-12-14 15:12:56,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:12:54" (2/3) ... [2021-12-14 15:12:56,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@922ca43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:12:56, skipping insertion in model container [2021-12-14 15:12:56,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:12:56" (3/3) ... [2021-12-14 15:12:56,556 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2021-12-14 15:12:56,559 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 15:12:56,560 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-14 15:12:56,592 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 15:12:56,597 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 [2021-12-14 15:12:56,597 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-14 15:12:56,627 INFO L276 IsEmpty]: Start isEmpty. Operand has 702 states, 699 states have (on average 1.7854077253218885) internal successors, (1248), 701 states have internal predecessors, (1248), 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) [2021-12-14 15:12:56,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-14 15:12:56,643 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:12:56,643 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] [2021-12-14 15:12:56,644 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:12:56,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:12:56,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1557815088, now seen corresponding path program 1 times [2021-12-14 15:12:56,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:12:56,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858762366] [2021-12-14 15:12:56,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:12:56,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:12:56,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:12:56,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:12:56,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:12:56,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858762366] [2021-12-14 15:12:56,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858762366] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:12:56,915 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:12:56,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:12:56,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344939168] [2021-12-14 15:12:56,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:12:56,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:12:56,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:12:56,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:12:56,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:12:56,972 INFO L87 Difference]: Start difference. First operand has 702 states, 699 states have (on average 1.7854077253218885) internal successors, (1248), 701 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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) [2021-12-14 15:12:57,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:12:57,123 INFO L93 Difference]: Finished difference Result 1063 states and 1849 transitions. [2021-12-14 15:12:57,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:12:57,125 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 62 [2021-12-14 15:12:57,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:12:57,138 INFO L225 Difference]: With dead ends: 1063 [2021-12-14 15:12:57,139 INFO L226 Difference]: Without dead ends: 842 [2021-12-14 15:12:57,142 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 [2021-12-14 15:12:57,145 INFO L933 BasicCegarLoop]: 1246 mSDtfsCounter, 630 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 630 SdHoareTripleChecker+Valid, 2071 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 15:12:57,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [630 Valid, 2071 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 15:12:57,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2021-12-14 15:12:57,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 840. [2021-12-14 15:12:57,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 838 states have (on average 1.3723150357995226) internal successors, (1150), 839 states have internal predecessors, (1150), 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) [2021-12-14 15:12:57,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 1150 transitions. [2021-12-14 15:12:57,228 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 1150 transitions. Word has length 62 [2021-12-14 15:12:57,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:12:57,229 INFO L470 AbstractCegarLoop]: Abstraction has 840 states and 1150 transitions. [2021-12-14 15:12:57,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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) [2021-12-14 15:12:57,229 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 1150 transitions. [2021-12-14 15:12:57,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-14 15:12:57,233 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:12:57,233 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] [2021-12-14 15:12:57,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 15:12:57,233 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:12:57,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:12:57,234 INFO L85 PathProgramCache]: Analyzing trace with hash 701475668, now seen corresponding path program 1 times [2021-12-14 15:12:57,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:12:57,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770628345] [2021-12-14 15:12:57,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:12:57,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:12:57,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:12:57,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:12:57,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:12:57,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770628345] [2021-12-14 15:12:57,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770628345] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:12:57,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:12:57,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:12:57,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68487488] [2021-12-14 15:12:57,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:12:57,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:12:57,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:12:57,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:12:57,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:12:57,331 INFO L87 Difference]: Start difference. First operand 840 states and 1150 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2021-12-14 15:12:57,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:12:57,454 INFO L93 Difference]: Finished difference Result 1461 states and 2022 transitions. [2021-12-14 15:12:57,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:12:57,455 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 63 [2021-12-14 15:12:57,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:12:57,460 INFO L225 Difference]: With dead ends: 1461 [2021-12-14 15:12:57,460 INFO L226 Difference]: Without dead ends: 1221 [2021-12-14 15:12:57,465 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 [2021-12-14 15:12:57,467 INFO L933 BasicCegarLoop]: 1034 mSDtfsCounter, 548 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 1679 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 15:12:57,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [548 Valid, 1679 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 15:12:57,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2021-12-14 15:12:57,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 1217. [2021-12-14 15:12:57,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1217 states, 1215 states have (on average 1.359670781893004) internal successors, (1652), 1216 states have internal predecessors, (1652), 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) [2021-12-14 15:12:57,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1217 states to 1217 states and 1652 transitions. [2021-12-14 15:12:57,499 INFO L78 Accepts]: Start accepts. Automaton has 1217 states and 1652 transitions. Word has length 63 [2021-12-14 15:12:57,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:12:57,500 INFO L470 AbstractCegarLoop]: Abstraction has 1217 states and 1652 transitions. [2021-12-14 15:12:57,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2021-12-14 15:12:57,500 INFO L276 IsEmpty]: Start isEmpty. Operand 1217 states and 1652 transitions. [2021-12-14 15:12:57,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-14 15:12:57,505 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:12:57,505 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] [2021-12-14 15:12:57,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 15:12:57,506 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:12:57,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:12:57,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1921206290, now seen corresponding path program 1 times [2021-12-14 15:12:57,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:12:57,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985214511] [2021-12-14 15:12:57,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:12:57,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:12:57,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:12:57,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:12:57,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:12:57,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985214511] [2021-12-14 15:12:57,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985214511] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:12:57,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:12:57,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:12:57,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439419422] [2021-12-14 15:12:57,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:12:57,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:12:57,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:12:57,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:12:57,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:12:57,568 INFO L87 Difference]: Start difference. First operand 1217 states and 1652 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2021-12-14 15:12:57,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:12:57,640 INFO L93 Difference]: Finished difference Result 2215 states and 3114 transitions. [2021-12-14 15:12:57,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:12:57,641 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 63 [2021-12-14 15:12:57,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:12:57,647 INFO L225 Difference]: With dead ends: 2215 [2021-12-14 15:12:57,647 INFO L226 Difference]: Without dead ends: 1684 [2021-12-14 15:12:57,650 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 [2021-12-14 15:12:57,653 INFO L933 BasicCegarLoop]: 947 mSDtfsCounter, 493 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 1576 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:12:57,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [493 Valid, 1576 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:12:57,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1684 states. [2021-12-14 15:12:57,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1684 to 1680. [2021-12-14 15:12:57,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1678 states have (on average 1.3790226460071513) internal successors, (2314), 1679 states have internal predecessors, (2314), 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) [2021-12-14 15:12:57,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 2314 transitions. [2021-12-14 15:12:57,689 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 2314 transitions. Word has length 63 [2021-12-14 15:12:57,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:12:57,689 INFO L470 AbstractCegarLoop]: Abstraction has 1680 states and 2314 transitions. [2021-12-14 15:12:57,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2021-12-14 15:12:57,689 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 2314 transitions. [2021-12-14 15:12:57,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-14 15:12:57,691 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:12:57,692 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] [2021-12-14 15:12:57,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 15:12:57,692 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:12:57,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:12:57,693 INFO L85 PathProgramCache]: Analyzing trace with hash 951298247, now seen corresponding path program 1 times [2021-12-14 15:12:57,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:12:57,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683411458] [2021-12-14 15:12:57,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:12:57,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:12:57,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:12:57,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:12:57,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:12:57,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683411458] [2021-12-14 15:12:57,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683411458] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:12:57,785 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:12:57,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 15:12:57,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038082435] [2021-12-14 15:12:57,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:12:57,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 15:12:57,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:12:57,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 15:12:57,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:12:57,787 INFO L87 Difference]: Start difference. First operand 1680 states and 2314 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 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) [2021-12-14 15:12:58,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:12:58,165 INFO L93 Difference]: Finished difference Result 3709 states and 5233 transitions. [2021-12-14 15:12:58,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 15:12:58,166 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 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 63 [2021-12-14 15:12:58,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:12:58,172 INFO L225 Difference]: With dead ends: 3709 [2021-12-14 15:12:58,172 INFO L226 Difference]: Without dead ends: 2253 [2021-12-14 15:12:58,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:12:58,174 INFO L933 BasicCegarLoop]: 437 mSDtfsCounter, 2599 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2599 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 15:12:58,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2599 Valid, 574 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 15:12:58,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2253 states. [2021-12-14 15:12:58,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2253 to 2251. [2021-12-14 15:12:58,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2251 states, 2249 states have (on average 1.4104046242774566) internal successors, (3172), 2250 states have internal predecessors, (3172), 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) [2021-12-14 15:12:58,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2251 states to 2251 states and 3172 transitions. [2021-12-14 15:12:58,227 INFO L78 Accepts]: Start accepts. Automaton has 2251 states and 3172 transitions. Word has length 63 [2021-12-14 15:12:58,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:12:58,228 INFO L470 AbstractCegarLoop]: Abstraction has 2251 states and 3172 transitions. [2021-12-14 15:12:58,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 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) [2021-12-14 15:12:58,228 INFO L276 IsEmpty]: Start isEmpty. Operand 2251 states and 3172 transitions. [2021-12-14 15:12:58,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-14 15:12:58,230 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:12:58,230 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] [2021-12-14 15:12:58,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 15:12:58,231 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:12:58,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:12:58,231 INFO L85 PathProgramCache]: Analyzing trace with hash -778566540, now seen corresponding path program 1 times [2021-12-14 15:12:58,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:12:58,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144626011] [2021-12-14 15:12:58,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:12:58,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:12:58,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:12:58,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:12:58,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:12:58,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144626011] [2021-12-14 15:12:58,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144626011] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:12:58,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:12:58,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:12:58,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987476884] [2021-12-14 15:12:58,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:12:58,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:12:58,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:12:58,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:12:58,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:12:58,268 INFO L87 Difference]: Start difference. First operand 2251 states and 3172 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2021-12-14 15:12:58,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:12:58,377 INFO L93 Difference]: Finished difference Result 4648 states and 6627 transitions. [2021-12-14 15:12:58,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:12:58,378 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 64 [2021-12-14 15:12:58,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:12:58,386 INFO L225 Difference]: With dead ends: 4648 [2021-12-14 15:12:58,387 INFO L226 Difference]: Without dead ends: 3138 [2021-12-14 15:12:58,389 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 [2021-12-14 15:12:58,390 INFO L933 BasicCegarLoop]: 946 mSDtfsCounter, 578 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 1480 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:12:58,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [578 Valid, 1480 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:12:58,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3138 states. [2021-12-14 15:12:58,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3138 to 3128. [2021-12-14 15:12:58,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3128 states, 3126 states have (on average 1.3909149072296865) internal successors, (4348), 3127 states have internal predecessors, (4348), 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) [2021-12-14 15:12:58,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3128 states to 3128 states and 4348 transitions. [2021-12-14 15:12:58,479 INFO L78 Accepts]: Start accepts. Automaton has 3128 states and 4348 transitions. Word has length 64 [2021-12-14 15:12:58,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:12:58,480 INFO L470 AbstractCegarLoop]: Abstraction has 3128 states and 4348 transitions. [2021-12-14 15:12:58,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2021-12-14 15:12:58,480 INFO L276 IsEmpty]: Start isEmpty. Operand 3128 states and 4348 transitions. [2021-12-14 15:12:58,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-14 15:12:58,483 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:12:58,483 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] [2021-12-14 15:12:58,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 15:12:58,484 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:12:58,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:12:58,484 INFO L85 PathProgramCache]: Analyzing trace with hash -535437974, now seen corresponding path program 1 times [2021-12-14 15:12:58,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:12:58,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162945662] [2021-12-14 15:12:58,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:12:58,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:12:58,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:12:58,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:12:58,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:12:58,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162945662] [2021-12-14 15:12:58,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162945662] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:12:58,530 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:12:58,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 15:12:58,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849618779] [2021-12-14 15:12:58,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:12:58,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 15:12:58,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:12:58,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 15:12:58,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:12:58,532 INFO L87 Difference]: Start difference. First operand 3128 states and 4348 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 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) [2021-12-14 15:12:58,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:12:58,942 INFO L93 Difference]: Finished difference Result 6737 states and 9460 transitions. [2021-12-14 15:12:58,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 15:12:58,943 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 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 65 [2021-12-14 15:12:58,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:12:58,955 INFO L225 Difference]: With dead ends: 6737 [2021-12-14 15:12:58,956 INFO L226 Difference]: Without dead ends: 3943 [2021-12-14 15:12:58,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:12:58,962 INFO L933 BasicCegarLoop]: 382 mSDtfsCounter, 2267 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2267 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 15:12:58,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2267 Valid, 521 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 15:12:58,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3943 states. [2021-12-14 15:12:59,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3943 to 3927. [2021-12-14 15:12:59,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3927 states, 3925 states have (on average 1.3946496815286624) internal successors, (5474), 3926 states have internal predecessors, (5474), 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) [2021-12-14 15:12:59,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3927 states to 3927 states and 5474 transitions. [2021-12-14 15:12:59,107 INFO L78 Accepts]: Start accepts. Automaton has 3927 states and 5474 transitions. Word has length 65 [2021-12-14 15:12:59,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:12:59,107 INFO L470 AbstractCegarLoop]: Abstraction has 3927 states and 5474 transitions. [2021-12-14 15:12:59,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 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) [2021-12-14 15:12:59,107 INFO L276 IsEmpty]: Start isEmpty. Operand 3927 states and 5474 transitions. [2021-12-14 15:12:59,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-14 15:12:59,111 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:12:59,111 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] [2021-12-14 15:12:59,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 15:12:59,111 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:12:59,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:12:59,111 INFO L85 PathProgramCache]: Analyzing trace with hash -881934793, now seen corresponding path program 1 times [2021-12-14 15:12:59,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:12:59,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787828283] [2021-12-14 15:12:59,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:12:59,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:12:59,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:12:59,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:12:59,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:12:59,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787828283] [2021-12-14 15:12:59,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787828283] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:12:59,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:12:59,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 15:12:59,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757314510] [2021-12-14 15:12:59,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:12:59,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 15:12:59,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:12:59,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 15:12:59,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:12:59,150 INFO L87 Difference]: Start difference. First operand 3927 states and 5474 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 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) [2021-12-14 15:12:59,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:12:59,526 INFO L93 Difference]: Finished difference Result 8987 states and 12601 transitions. [2021-12-14 15:12:59,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 15:12:59,527 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 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 66 [2021-12-14 15:12:59,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:12:59,541 INFO L225 Difference]: With dead ends: 8987 [2021-12-14 15:12:59,541 INFO L226 Difference]: Without dead ends: 5345 [2021-12-14 15:12:59,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:12:59,546 INFO L933 BasicCegarLoop]: 396 mSDtfsCounter, 2339 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2339 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 15:12:59,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2339 Valid, 529 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 15:12:59,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5345 states. [2021-12-14 15:12:59,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5345 to 3927. [2021-12-14 15:12:59,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3927 states, 3925 states have (on average 1.3898089171974521) internal successors, (5455), 3926 states have internal predecessors, (5455), 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) [2021-12-14 15:12:59,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3927 states to 3927 states and 5455 transitions. [2021-12-14 15:12:59,705 INFO L78 Accepts]: Start accepts. Automaton has 3927 states and 5455 transitions. Word has length 66 [2021-12-14 15:12:59,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:12:59,705 INFO L470 AbstractCegarLoop]: Abstraction has 3927 states and 5455 transitions. [2021-12-14 15:12:59,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 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) [2021-12-14 15:12:59,705 INFO L276 IsEmpty]: Start isEmpty. Operand 3927 states and 5455 transitions. [2021-12-14 15:12:59,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-14 15:12:59,708 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:12:59,708 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] [2021-12-14 15:12:59,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 15:12:59,709 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:12:59,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:12:59,709 INFO L85 PathProgramCache]: Analyzing trace with hash -741572489, now seen corresponding path program 1 times [2021-12-14 15:12:59,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:12:59,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678873565] [2021-12-14 15:12:59,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:12:59,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:12:59,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:12:59,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:12:59,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:12:59,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678873565] [2021-12-14 15:12:59,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678873565] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:12:59,762 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:12:59,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 15:12:59,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118132779] [2021-12-14 15:12:59,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:12:59,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 15:12:59,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:12:59,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 15:12:59,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:12:59,764 INFO L87 Difference]: Start difference. First operand 3927 states and 5455 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 6 states have internal predecessors, (66), 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) [2021-12-14 15:13:00,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:13:00,719 INFO L93 Difference]: Finished difference Result 13399 states and 19176 transitions. [2021-12-14 15:13:00,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 15:13:00,720 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 6 states have internal predecessors, (66), 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 66 [2021-12-14 15:13:00,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:13:00,756 INFO L225 Difference]: With dead ends: 13399 [2021-12-14 15:13:00,756 INFO L226 Difference]: Without dead ends: 12233 [2021-12-14 15:13:00,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-14 15:13:00,762 INFO L933 BasicCegarLoop]: 393 mSDtfsCounter, 4771 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4771 SdHoareTripleChecker+Valid, 1026 SdHoareTripleChecker+Invalid, 951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 15:13:00,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4771 Valid, 1026 Invalid, 951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 15:13:00,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12233 states. [2021-12-14 15:13:00,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12233 to 3951. [2021-12-14 15:13:00,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3951 states, 3949 states have (on average 1.3894656875158269) internal successors, (5487), 3950 states have internal predecessors, (5487), 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) [2021-12-14 15:13:00,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3951 states to 3951 states and 5487 transitions. [2021-12-14 15:13:00,987 INFO L78 Accepts]: Start accepts. Automaton has 3951 states and 5487 transitions. Word has length 66 [2021-12-14 15:13:00,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:13:00,988 INFO L470 AbstractCegarLoop]: Abstraction has 3951 states and 5487 transitions. [2021-12-14 15:13:00,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 6 states have internal predecessors, (66), 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) [2021-12-14 15:13:00,988 INFO L276 IsEmpty]: Start isEmpty. Operand 3951 states and 5487 transitions. [2021-12-14 15:13:00,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-14 15:13:00,991 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:13:00,992 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] [2021-12-14 15:13:00,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 15:13:00,992 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:13:00,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:13:00,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1492647215, now seen corresponding path program 1 times [2021-12-14 15:13:00,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:13:00,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093201740] [2021-12-14 15:13:00,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:13:00,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:13:01,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:13:01,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:13:01,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:13:01,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093201740] [2021-12-14 15:13:01,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093201740] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:13:01,045 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:13:01,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 15:13:01,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939688667] [2021-12-14 15:13:01,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:13:01,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 15:13:01,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:13:01,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 15:13:01,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:13:01,047 INFO L87 Difference]: Start difference. First operand 3951 states and 5487 transitions. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 6 states have internal predecessors, (67), 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) [2021-12-14 15:13:02,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:13:02,015 INFO L93 Difference]: Finished difference Result 12281 states and 17342 transitions. [2021-12-14 15:13:02,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 15:13:02,016 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 6 states have internal predecessors, (67), 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 67 [2021-12-14 15:13:02,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:13:02,033 INFO L225 Difference]: With dead ends: 12281 [2021-12-14 15:13:02,033 INFO L226 Difference]: Without dead ends: 10904 [2021-12-14 15:13:02,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-14 15:13:02,038 INFO L933 BasicCegarLoop]: 401 mSDtfsCounter, 4122 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4122 SdHoareTripleChecker+Valid, 938 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 15:13:02,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4122 Valid, 938 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 15:13:02,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10904 states. [2021-12-14 15:13:02,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10904 to 3979. [2021-12-14 15:13:02,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3979 states, 3977 states have (on average 1.3887352275584612) internal successors, (5523), 3978 states have internal predecessors, (5523), 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) [2021-12-14 15:13:02,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3979 states to 3979 states and 5523 transitions. [2021-12-14 15:13:02,275 INFO L78 Accepts]: Start accepts. Automaton has 3979 states and 5523 transitions. Word has length 67 [2021-12-14 15:13:02,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:13:02,276 INFO L470 AbstractCegarLoop]: Abstraction has 3979 states and 5523 transitions. [2021-12-14 15:13:02,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 6 states have internal predecessors, (67), 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) [2021-12-14 15:13:02,276 INFO L276 IsEmpty]: Start isEmpty. Operand 3979 states and 5523 transitions. [2021-12-14 15:13:02,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-14 15:13:02,279 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:13:02,279 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] [2021-12-14 15:13:02,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 15:13:02,280 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:13:02,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:13:02,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1629228246, now seen corresponding path program 1 times [2021-12-14 15:13:02,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:13:02,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512228193] [2021-12-14 15:13:02,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:13:02,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:13:02,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:13:02,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:13:02,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:13:02,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512228193] [2021-12-14 15:13:02,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512228193] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:13:02,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:13:02,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 15:13:02,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200632639] [2021-12-14 15:13:02,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:13:02,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 15:13:02,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:13:02,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 15:13:02,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:13:02,320 INFO L87 Difference]: Start difference. First operand 3979 states and 5523 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 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) [2021-12-14 15:13:02,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:13:02,828 INFO L93 Difference]: Finished difference Result 8837 states and 12282 transitions. [2021-12-14 15:13:02,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 15:13:02,828 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 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 67 [2021-12-14 15:13:02,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:13:02,836 INFO L225 Difference]: With dead ends: 8837 [2021-12-14 15:13:02,836 INFO L226 Difference]: Without dead ends: 5166 [2021-12-14 15:13:02,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:13:02,841 INFO L933 BasicCegarLoop]: 361 mSDtfsCounter, 2057 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2057 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 15:13:02,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2057 Valid, 477 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 15:13:02,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5166 states. [2021-12-14 15:13:03,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5166 to 5144. [2021-12-14 15:13:03,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5144 states, 5142 states have (on average 1.3753403345001944) internal successors, (7072), 5143 states have internal predecessors, (7072), 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) [2021-12-14 15:13:03,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5144 states to 5144 states and 7072 transitions. [2021-12-14 15:13:03,124 INFO L78 Accepts]: Start accepts. Automaton has 5144 states and 7072 transitions. Word has length 67 [2021-12-14 15:13:03,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:13:03,124 INFO L470 AbstractCegarLoop]: Abstraction has 5144 states and 7072 transitions. [2021-12-14 15:13:03,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 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) [2021-12-14 15:13:03,125 INFO L276 IsEmpty]: Start isEmpty. Operand 5144 states and 7072 transitions. [2021-12-14 15:13:03,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-14 15:13:03,129 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:13:03,129 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] [2021-12-14 15:13:03,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 15:13:03,130 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:13:03,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:13:03,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1569192756, now seen corresponding path program 1 times [2021-12-14 15:13:03,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:13:03,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138591452] [2021-12-14 15:13:03,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:13:03,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:13:03,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:13:03,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:13:03,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:13:03,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138591452] [2021-12-14 15:13:03,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138591452] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:13:03,177 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:13:03,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 15:13:03,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794470507] [2021-12-14 15:13:03,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:13:03,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 15:13:03,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:13:03,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 15:13:03,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:13:03,179 INFO L87 Difference]: Start difference. First operand 5144 states and 7072 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 6 states have internal predecessors, (68), 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) [2021-12-14 15:13:04,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:13:04,609 INFO L93 Difference]: Finished difference Result 21648 states and 30629 transitions. [2021-12-14 15:13:04,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 15:13:04,609 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 6 states have internal predecessors, (68), 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 68 [2021-12-14 15:13:04,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:13:04,643 INFO L225 Difference]: With dead ends: 21648 [2021-12-14 15:13:04,644 INFO L226 Difference]: Without dead ends: 19448 [2021-12-14 15:13:04,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-14 15:13:04,652 INFO L933 BasicCegarLoop]: 391 mSDtfsCounter, 4207 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4207 SdHoareTripleChecker+Valid, 1010 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 15:13:04,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4207 Valid, 1010 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 15:13:04,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19448 states. [2021-12-14 15:13:05,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19448 to 5241. [2021-12-14 15:13:05,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5241 states, 5239 states have (on average 1.3744989501813323) internal successors, (7201), 5240 states have internal predecessors, (7201), 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) [2021-12-14 15:13:05,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5241 states to 5241 states and 7201 transitions. [2021-12-14 15:13:05,140 INFO L78 Accepts]: Start accepts. Automaton has 5241 states and 7201 transitions. Word has length 68 [2021-12-14 15:13:05,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:13:05,141 INFO L470 AbstractCegarLoop]: Abstraction has 5241 states and 7201 transitions. [2021-12-14 15:13:05,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 6 states have internal predecessors, (68), 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) [2021-12-14 15:13:05,141 INFO L276 IsEmpty]: Start isEmpty. Operand 5241 states and 7201 transitions. [2021-12-14 15:13:05,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-14 15:13:05,146 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:13:05,146 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] [2021-12-14 15:13:05,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 15:13:05,146 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:13:05,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:13:05,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1812754967, now seen corresponding path program 1 times [2021-12-14 15:13:05,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:13:05,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024274132] [2021-12-14 15:13:05,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:13:05,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:13:05,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:13:05,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:13:05,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:13:05,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024274132] [2021-12-14 15:13:05,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024274132] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:13:05,269 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:13:05,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 15:13:05,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314339662] [2021-12-14 15:13:05,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:13:05,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 15:13:05,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:13:05,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 15:13:05,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-14 15:13:05,271 INFO L87 Difference]: Start difference. First operand 5241 states and 7201 transitions. Second operand has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 8 states have internal predecessors, (69), 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) [2021-12-14 15:13:06,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:13:06,906 INFO L93 Difference]: Finished difference Result 15959 states and 22582 transitions. [2021-12-14 15:13:06,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 15:13:06,907 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 8 states have internal predecessors, (69), 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 69 [2021-12-14 15:13:06,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:13:06,928 INFO L225 Difference]: With dead ends: 15959 [2021-12-14 15:13:06,928 INFO L226 Difference]: Without dead ends: 12925 [2021-12-14 15:13:06,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2021-12-14 15:13:06,934 INFO L933 BasicCegarLoop]: 477 mSDtfsCounter, 3390 mSDsluCounter, 1439 mSDsCounter, 0 mSdLazyCounter, 1386 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3390 SdHoareTripleChecker+Valid, 1916 SdHoareTripleChecker+Invalid, 1477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 15:13:06,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3390 Valid, 1916 Invalid, 1477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1386 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 15:13:06,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12925 states. [2021-12-14 15:13:07,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12925 to 5237. [2021-12-14 15:13:07,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5237 states, 5235 states have (on average 1.3740210124164278) internal successors, (7193), 5236 states have internal predecessors, (7193), 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) [2021-12-14 15:13:07,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5237 states to 5237 states and 7193 transitions. [2021-12-14 15:13:07,280 INFO L78 Accepts]: Start accepts. Automaton has 5237 states and 7193 transitions. Word has length 69 [2021-12-14 15:13:07,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:13:07,280 INFO L470 AbstractCegarLoop]: Abstraction has 5237 states and 7193 transitions. [2021-12-14 15:13:07,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.666666666666667) internal successors, (69), 8 states have internal predecessors, (69), 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) [2021-12-14 15:13:07,281 INFO L276 IsEmpty]: Start isEmpty. Operand 5237 states and 7193 transitions. [2021-12-14 15:13:07,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-14 15:13:07,285 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:13:07,286 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] [2021-12-14 15:13:07,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-14 15:13:07,286 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:13:07,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:13:07,286 INFO L85 PathProgramCache]: Analyzing trace with hash -445002902, now seen corresponding path program 1 times [2021-12-14 15:13:07,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:13:07,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610100647] [2021-12-14 15:13:07,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:13:07,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:13:07,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:13:07,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:13:07,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:13:07,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610100647] [2021-12-14 15:13:07,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610100647] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:13:07,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:13:07,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 15:13:07,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128760065] [2021-12-14 15:13:07,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:13:07,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 15:13:07,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:13:07,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 15:13:07,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-14 15:13:07,440 INFO L87 Difference]: Start difference. First operand 5237 states and 7193 transitions. Second operand has 10 states, 10 states have (on average 6.9) internal successors, (69), 9 states have internal predecessors, (69), 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) [2021-12-14 15:13:10,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:13:10,109 INFO L93 Difference]: Finished difference Result 18098 states and 25263 transitions. [2021-12-14 15:13:10,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-14 15:13:10,110 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.9) internal successors, (69), 9 states have internal predecessors, (69), 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 69 [2021-12-14 15:13:10,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:13:10,133 INFO L225 Difference]: With dead ends: 18098 [2021-12-14 15:13:10,133 INFO L226 Difference]: Without dead ends: 16480 [2021-12-14 15:13:10,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2021-12-14 15:13:10,141 INFO L933 BasicCegarLoop]: 568 mSDtfsCounter, 3411 mSDsluCounter, 2625 mSDsCounter, 0 mSdLazyCounter, 2522 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3411 SdHoareTripleChecker+Valid, 3193 SdHoareTripleChecker+Invalid, 2564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 2522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-14 15:13:10,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3411 Valid, 3193 Invalid, 2564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 2522 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-14 15:13:10,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16480 states. [2021-12-14 15:13:10,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16480 to 5237. [2021-12-14 15:13:10,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5237 states, 5235 states have (on average 1.3736389684813755) internal successors, (7191), 5236 states have internal predecessors, (7191), 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) [2021-12-14 15:13:10,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5237 states to 5237 states and 7191 transitions. [2021-12-14 15:13:10,592 INFO L78 Accepts]: Start accepts. Automaton has 5237 states and 7191 transitions. Word has length 69 [2021-12-14 15:13:10,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:13:10,592 INFO L470 AbstractCegarLoop]: Abstraction has 5237 states and 7191 transitions. [2021-12-14 15:13:10,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.9) internal successors, (69), 9 states have internal predecessors, (69), 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) [2021-12-14 15:13:10,593 INFO L276 IsEmpty]: Start isEmpty. Operand 5237 states and 7191 transitions. [2021-12-14 15:13:10,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-14 15:13:10,597 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:13:10,597 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] [2021-12-14 15:13:10,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 15:13:10,597 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:13:10,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:13:10,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1293297930, now seen corresponding path program 1 times [2021-12-14 15:13:10,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:13:10,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592005035] [2021-12-14 15:13:10,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:13:10,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:13:10,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:13:10,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:13:10,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:13:10,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592005035] [2021-12-14 15:13:10,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592005035] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:13:10,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:13:10,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 15:13:10,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688861893] [2021-12-14 15:13:10,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:13:10,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 15:13:10,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:13:10,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 15:13:10,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-14 15:13:10,672 INFO L87 Difference]: Start difference. First operand 5237 states and 7191 transitions. Second operand has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 8 states have internal predecessors, (70), 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) [2021-12-14 15:13:12,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:13:12,872 INFO L93 Difference]: Finished difference Result 20133 states and 28579 transitions. [2021-12-14 15:13:12,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-14 15:13:12,873 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 8 states have internal predecessors, (70), 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 70 [2021-12-14 15:13:12,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:13:12,899 INFO L225 Difference]: With dead ends: 20133 [2021-12-14 15:13:12,900 INFO L226 Difference]: Without dead ends: 17057 [2021-12-14 15:13:12,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=438, Unknown=0, NotChecked=0, Total=600 [2021-12-14 15:13:12,910 INFO L933 BasicCegarLoop]: 467 mSDtfsCounter, 2578 mSDsluCounter, 2039 mSDsCounter, 0 mSdLazyCounter, 1705 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2578 SdHoareTripleChecker+Valid, 2506 SdHoareTripleChecker+Invalid, 1778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 15:13:12,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2578 Valid, 2506 Invalid, 1778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1705 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 15:13:12,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17057 states. [2021-12-14 15:13:13,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17057 to 5213. [2021-12-14 15:13:13,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5213 states, 5211 states have (on average 1.3724812895797351) internal successors, (7152), 5212 states have internal predecessors, (7152), 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) [2021-12-14 15:13:13,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5213 states to 5213 states and 7152 transitions. [2021-12-14 15:13:13,411 INFO L78 Accepts]: Start accepts. Automaton has 5213 states and 7152 transitions. Word has length 70 [2021-12-14 15:13:13,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:13:13,411 INFO L470 AbstractCegarLoop]: Abstraction has 5213 states and 7152 transitions. [2021-12-14 15:13:13,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.777777777777778) internal successors, (70), 8 states have internal predecessors, (70), 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) [2021-12-14 15:13:13,411 INFO L276 IsEmpty]: Start isEmpty. Operand 5213 states and 7152 transitions. [2021-12-14 15:13:13,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-14 15:13:13,415 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:13:13,415 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] [2021-12-14 15:13:13,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-14 15:13:13,415 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:13:13,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:13:13,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1552924457, now seen corresponding path program 1 times [2021-12-14 15:13:13,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:13:13,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710845648] [2021-12-14 15:13:13,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:13:13,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:13:13,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:13:13,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:13:13,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:13:13,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710845648] [2021-12-14 15:13:13,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710845648] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:13:13,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:13:13,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-14 15:13:13,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21680507] [2021-12-14 15:13:13,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:13:13,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-14 15:13:13,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:13:13,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-14 15:13:13,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-12-14 15:13:13,651 INFO L87 Difference]: Start difference. First operand 5213 states and 7152 transitions. Second operand has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 13 states have internal predecessors, (70), 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) [2021-12-14 15:13:17,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:13:17,267 INFO L93 Difference]: Finished difference Result 30705 states and 43716 transitions. [2021-12-14 15:13:17,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-14 15:13:17,268 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 13 states have internal predecessors, (70), 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 70 [2021-12-14 15:13:17,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:13:17,313 INFO L225 Difference]: With dead ends: 30705 [2021-12-14 15:13:17,313 INFO L226 Difference]: Without dead ends: 27473 [2021-12-14 15:13:17,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2021-12-14 15:13:17,323 INFO L933 BasicCegarLoop]: 852 mSDtfsCounter, 5184 mSDsluCounter, 4145 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5184 SdHoareTripleChecker+Valid, 4997 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 15:13:17,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5184 Valid, 4997 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 15:13:17,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27473 states. [2021-12-14 15:13:17,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27473 to 5003. [2021-12-14 15:13:17,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5003 states, 5001 states have (on average 1.3753249350129975) internal successors, (6878), 5002 states have internal predecessors, (6878), 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) [2021-12-14 15:13:17,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5003 states to 5003 states and 6878 transitions. [2021-12-14 15:13:17,895 INFO L78 Accepts]: Start accepts. Automaton has 5003 states and 6878 transitions. Word has length 70 [2021-12-14 15:13:17,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:13:17,895 INFO L470 AbstractCegarLoop]: Abstraction has 5003 states and 6878 transitions. [2021-12-14 15:13:17,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 13 states have internal predecessors, (70), 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) [2021-12-14 15:13:17,895 INFO L276 IsEmpty]: Start isEmpty. Operand 5003 states and 6878 transitions. [2021-12-14 15:13:17,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-14 15:13:17,901 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:13:17,901 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] [2021-12-14 15:13:17,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-14 15:13:17,901 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:13:17,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:13:17,902 INFO L85 PathProgramCache]: Analyzing trace with hash -757708310, now seen corresponding path program 1 times [2021-12-14 15:13:17,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:13:17,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348558874] [2021-12-14 15:13:17,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:13:17,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:13:17,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:13:17,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:13:17,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:13:17,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348558874] [2021-12-14 15:13:17,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348558874] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:13:17,961 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:13:17,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 15:13:17,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128223274] [2021-12-14 15:13:17,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:13:17,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 15:13:17,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:13:17,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 15:13:17,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:13:17,963 INFO L87 Difference]: Start difference. First operand 5003 states and 6878 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 6 states have internal predecessors, (70), 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) [2021-12-14 15:13:20,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:13:20,586 INFO L93 Difference]: Finished difference Result 18671 states and 26383 transitions. [2021-12-14 15:13:20,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 15:13:20,588 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 6 states have internal predecessors, (70), 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 70 [2021-12-14 15:13:20,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:13:20,609 INFO L225 Difference]: With dead ends: 18671 [2021-12-14 15:13:20,609 INFO L226 Difference]: Without dead ends: 16635 [2021-12-14 15:13:20,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-14 15:13:20,616 INFO L933 BasicCegarLoop]: 411 mSDtfsCounter, 2836 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2836 SdHoareTripleChecker+Valid, 1085 SdHoareTripleChecker+Invalid, 995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 15:13:20,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2836 Valid, 1085 Invalid, 995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 15:13:20,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16635 states. [2021-12-14 15:13:21,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16635 to 5074. [2021-12-14 15:13:21,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5074 states, 5072 states have (on average 1.3755914826498423) internal successors, (6977), 5073 states have internal predecessors, (6977), 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) [2021-12-14 15:13:21,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5074 states to 5074 states and 6977 transitions. [2021-12-14 15:13:21,230 INFO L78 Accepts]: Start accepts. Automaton has 5074 states and 6977 transitions. Word has length 70 [2021-12-14 15:13:21,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:13:21,230 INFO L470 AbstractCegarLoop]: Abstraction has 5074 states and 6977 transitions. [2021-12-14 15:13:21,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 6 states have internal predecessors, (70), 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) [2021-12-14 15:13:21,231 INFO L276 IsEmpty]: Start isEmpty. Operand 5074 states and 6977 transitions. [2021-12-14 15:13:21,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-14 15:13:21,234 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:13:21,235 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] [2021-12-14 15:13:21,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-14 15:13:21,235 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:13:21,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:13:21,235 INFO L85 PathProgramCache]: Analyzing trace with hash 55096187, now seen corresponding path program 1 times [2021-12-14 15:13:21,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:13:21,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726079176] [2021-12-14 15:13:21,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:13:21,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:13:21,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:13:21,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:13:21,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:13:21,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726079176] [2021-12-14 15:13:21,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726079176] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:13:21,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:13:21,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-14 15:13:21,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428354876] [2021-12-14 15:13:21,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:13:21,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-14 15:13:21,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:13:21,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-14 15:13:21,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-12-14 15:13:21,537 INFO L87 Difference]: Start difference. First operand 5074 states and 6977 transitions. Second operand has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 13 states have internal predecessors, (70), 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) [2021-12-14 15:13:27,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:13:27,518 INFO L93 Difference]: Finished difference Result 35132 states and 50360 transitions. [2021-12-14 15:13:27,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-14 15:13:27,518 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 13 states have internal predecessors, (70), 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 70 [2021-12-14 15:13:27,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:13:27,559 INFO L225 Difference]: With dead ends: 35132 [2021-12-14 15:13:27,559 INFO L226 Difference]: Without dead ends: 32100 [2021-12-14 15:13:27,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=221, Invalid=771, Unknown=0, NotChecked=0, Total=992 [2021-12-14 15:13:27,570 INFO L933 BasicCegarLoop]: 705 mSDtfsCounter, 5171 mSDsluCounter, 5540 mSDsCounter, 0 mSdLazyCounter, 1669 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5171 SdHoareTripleChecker+Valid, 6245 SdHoareTripleChecker+Invalid, 1804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 15:13:27,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5171 Valid, 6245 Invalid, 1804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1669 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-14 15:13:27,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32100 states. [2021-12-14 15:13:28,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32100 to 5068. [2021-12-14 15:13:28,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5068 states, 5066 states have (on average 1.3748519542045006) internal successors, (6965), 5067 states have internal predecessors, (6965), 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) [2021-12-14 15:13:28,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5068 states to 5068 states and 6965 transitions. [2021-12-14 15:13:28,504 INFO L78 Accepts]: Start accepts. Automaton has 5068 states and 6965 transitions. Word has length 70 [2021-12-14 15:13:28,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:13:28,504 INFO L470 AbstractCegarLoop]: Abstraction has 5068 states and 6965 transitions. [2021-12-14 15:13:28,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 13 states have internal predecessors, (70), 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) [2021-12-14 15:13:28,504 INFO L276 IsEmpty]: Start isEmpty. Operand 5068 states and 6965 transitions. [2021-12-14 15:13:28,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-14 15:13:28,508 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:13:28,508 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] [2021-12-14 15:13:28,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-14 15:13:28,509 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:13:28,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:13:28,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1421654202, now seen corresponding path program 1 times [2021-12-14 15:13:28,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:13:28,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693603217] [2021-12-14 15:13:28,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:13:28,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:13:28,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:13:28,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:13:28,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:13:28,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693603217] [2021-12-14 15:13:28,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693603217] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:13:28,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:13:28,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-14 15:13:28,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272184781] [2021-12-14 15:13:28,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:13:28,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-14 15:13:28,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:13:28,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-14 15:13:28,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-12-14 15:13:28,815 INFO L87 Difference]: Start difference. First operand 5068 states and 6965 transitions. Second operand has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 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) [2021-12-14 15:13:33,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:13:33,688 INFO L93 Difference]: Finished difference Result 27397 states and 39092 transitions. [2021-12-14 15:13:33,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-14 15:13:33,688 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 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 71 [2021-12-14 15:13:33,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:13:33,718 INFO L225 Difference]: With dead ends: 27397 [2021-12-14 15:13:33,718 INFO L226 Difference]: Without dead ends: 24286 [2021-12-14 15:13:33,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=167, Invalid=483, Unknown=0, NotChecked=0, Total=650 [2021-12-14 15:13:33,728 INFO L933 BasicCegarLoop]: 878 mSDtfsCounter, 4194 mSDsluCounter, 4463 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4194 SdHoareTripleChecker+Valid, 5341 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 15:13:33,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4194 Valid, 5341 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 15:13:33,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24286 states. [2021-12-14 15:13:34,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24286 to 4983. [2021-12-14 15:13:34,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4983 states, 4982 states have (on average 1.372340425531915) internal successors, (6837), 4982 states have internal predecessors, (6837), 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) [2021-12-14 15:13:34,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4983 states to 4983 states and 6837 transitions. [2021-12-14 15:13:34,570 INFO L78 Accepts]: Start accepts. Automaton has 4983 states and 6837 transitions. Word has length 71 [2021-12-14 15:13:34,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:13:34,571 INFO L470 AbstractCegarLoop]: Abstraction has 4983 states and 6837 transitions. [2021-12-14 15:13:34,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 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) [2021-12-14 15:13:34,571 INFO L276 IsEmpty]: Start isEmpty. Operand 4983 states and 6837 transitions. [2021-12-14 15:13:34,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-14 15:13:34,574 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:13:34,574 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] [2021-12-14 15:13:34,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-14 15:13:34,575 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:13:34,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:13:34,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1130829185, now seen corresponding path program 1 times [2021-12-14 15:13:34,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:13:34,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215732746] [2021-12-14 15:13:34,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:13:34,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:13:34,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:13:34,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:13:34,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:13:34,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215732746] [2021-12-14 15:13:34,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215732746] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:13:34,639 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:13:34,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 15:13:34,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803690426] [2021-12-14 15:13:34,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:13:34,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 15:13:34,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:13:34,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 15:13:34,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:13:34,641 INFO L87 Difference]: Start difference. First operand 4983 states and 6837 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 6 states have internal predecessors, (71), 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) [2021-12-14 15:13:38,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:13:38,671 INFO L93 Difference]: Finished difference Result 21166 states and 30003 transitions. [2021-12-14 15:13:38,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 15:13:38,672 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 6 states have internal predecessors, (71), 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 71 [2021-12-14 15:13:38,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:13:38,692 INFO L225 Difference]: With dead ends: 21166 [2021-12-14 15:13:38,692 INFO L226 Difference]: Without dead ends: 19084 [2021-12-14 15:13:38,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-14 15:13:38,697 INFO L933 BasicCegarLoop]: 391 mSDtfsCounter, 2876 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2876 SdHoareTripleChecker+Valid, 1050 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 15:13:38,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2876 Valid, 1050 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 15:13:38,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19084 states. [2021-12-14 15:13:39,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19084 to 5013. [2021-12-14 15:13:39,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5013 states, 5012 states have (on average 1.3721069433359936) internal successors, (6877), 5012 states have internal predecessors, (6877), 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) [2021-12-14 15:13:39,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5013 states to 5013 states and 6877 transitions. [2021-12-14 15:13:39,558 INFO L78 Accepts]: Start accepts. Automaton has 5013 states and 6877 transitions. Word has length 71 [2021-12-14 15:13:39,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:13:39,558 INFO L470 AbstractCegarLoop]: Abstraction has 5013 states and 6877 transitions. [2021-12-14 15:13:39,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 6 states have internal predecessors, (71), 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) [2021-12-14 15:13:39,558 INFO L276 IsEmpty]: Start isEmpty. Operand 5013 states and 6877 transitions. [2021-12-14 15:13:39,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-14 15:13:39,562 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:13:39,562 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] [2021-12-14 15:13:39,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-14 15:13:39,562 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:13:39,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:13:39,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1491852773, now seen corresponding path program 1 times [2021-12-14 15:13:39,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:13:39,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958475180] [2021-12-14 15:13:39,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:13:39,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:13:39,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:13:39,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:13:39,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:13:39,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958475180] [2021-12-14 15:13:39,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958475180] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:13:39,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:13:39,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 15:13:39,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151841413] [2021-12-14 15:13:39,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:13:39,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 15:13:39,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:13:39,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 15:13:39,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-14 15:13:39,668 INFO L87 Difference]: Start difference. First operand 5013 states and 6877 transitions. Second operand has 10 states, 10 states have (on average 7.1) internal successors, (71), 9 states have internal predecessors, (71), 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) [2021-12-14 15:13:44,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:13:44,112 INFO L93 Difference]: Finished difference Result 21393 states and 30303 transitions. [2021-12-14 15:13:44,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-14 15:13:44,113 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.1) internal successors, (71), 9 states have internal predecessors, (71), 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 71 [2021-12-14 15:13:44,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:13:44,134 INFO L225 Difference]: With dead ends: 21393 [2021-12-14 15:13:44,134 INFO L226 Difference]: Without dead ends: 18105 [2021-12-14 15:13:44,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-12-14 15:13:44,141 INFO L933 BasicCegarLoop]: 486 mSDtfsCounter, 3268 mSDsluCounter, 2318 mSDsCounter, 0 mSdLazyCounter, 1785 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3268 SdHoareTripleChecker+Valid, 2804 SdHoareTripleChecker+Invalid, 1879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 15:13:44,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3268 Valid, 2804 Invalid, 1879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1785 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 15:13:44,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18105 states. [2021-12-14 15:13:44,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18105 to 4876. [2021-12-14 15:13:44,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4876 states, 4875 states have (on average 1.3721025641025641) internal successors, (6689), 4875 states have internal predecessors, (6689), 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) [2021-12-14 15:13:44,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4876 states to 4876 states and 6689 transitions. [2021-12-14 15:13:44,998 INFO L78 Accepts]: Start accepts. Automaton has 4876 states and 6689 transitions. Word has length 71 [2021-12-14 15:13:44,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:13:44,998 INFO L470 AbstractCegarLoop]: Abstraction has 4876 states and 6689 transitions. [2021-12-14 15:13:44,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.1) internal successors, (71), 9 states have internal predecessors, (71), 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) [2021-12-14 15:13:44,998 INFO L276 IsEmpty]: Start isEmpty. Operand 4876 states and 6689 transitions. [2021-12-14 15:13:45,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-14 15:13:45,002 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:13:45,002 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] [2021-12-14 15:13:45,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-14 15:13:45,002 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:13:45,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:13:45,002 INFO L85 PathProgramCache]: Analyzing trace with hash -697354618, now seen corresponding path program 1 times [2021-12-14 15:13:45,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:13:45,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213329265] [2021-12-14 15:13:45,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:13:45,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:13:45,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:13:45,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:13:45,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:13:45,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213329265] [2021-12-14 15:13:45,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213329265] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:13:45,198 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:13:45,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-14 15:13:45,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240092681] [2021-12-14 15:13:45,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:13:45,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-14 15:13:45,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:13:45,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-14 15:13:45,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-12-14 15:13:45,200 INFO L87 Difference]: Start difference. First operand 4876 states and 6689 transitions. Second operand has 12 states, 12 states have (on average 6.0) internal successors, (72), 12 states have internal predecessors, (72), 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) [2021-12-14 15:13:54,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:13:54,848 INFO L93 Difference]: Finished difference Result 38922 states and 55764 transitions. [2021-12-14 15:13:54,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-14 15:13:54,848 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.0) internal successors, (72), 12 states have internal predecessors, (72), 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 72 [2021-12-14 15:13:54,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:13:54,890 INFO L225 Difference]: With dead ends: 38922 [2021-12-14 15:13:54,890 INFO L226 Difference]: Without dead ends: 35892 [2021-12-14 15:13:54,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=301, Invalid=1031, Unknown=0, NotChecked=0, Total=1332 [2021-12-14 15:13:54,902 INFO L933 BasicCegarLoop]: 649 mSDtfsCounter, 4621 mSDsluCounter, 5409 mSDsCounter, 0 mSdLazyCounter, 1626 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4621 SdHoareTripleChecker+Valid, 6058 SdHoareTripleChecker+Invalid, 1731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-14 15:13:54,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4621 Valid, 6058 Invalid, 1731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1626 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-14 15:13:54,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35892 states. [2021-12-14 15:13:56,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35892 to 4884. [2021-12-14 15:13:56,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4884 states, 4883 states have (on average 1.3723121032152366) internal successors, (6701), 4883 states have internal predecessors, (6701), 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) [2021-12-14 15:13:56,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4884 states to 4884 states and 6701 transitions. [2021-12-14 15:13:56,024 INFO L78 Accepts]: Start accepts. Automaton has 4884 states and 6701 transitions. Word has length 72 [2021-12-14 15:13:56,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:13:56,024 INFO L470 AbstractCegarLoop]: Abstraction has 4884 states and 6701 transitions. [2021-12-14 15:13:56,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.0) internal successors, (72), 12 states have internal predecessors, (72), 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) [2021-12-14 15:13:56,024 INFO L276 IsEmpty]: Start isEmpty. Operand 4884 states and 6701 transitions. [2021-12-14 15:13:56,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-14 15:13:56,028 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:13:56,028 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] [2021-12-14 15:13:56,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-14 15:13:56,029 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:13:56,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:13:56,029 INFO L85 PathProgramCache]: Analyzing trace with hash -967274292, now seen corresponding path program 1 times [2021-12-14 15:13:56,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:13:56,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422123921] [2021-12-14 15:13:56,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:13:56,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:13:56,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:13:56,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:13:56,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:13:56,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422123921] [2021-12-14 15:13:56,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422123921] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:13:56,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:13:56,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:13:56,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668247406] [2021-12-14 15:13:56,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:13:56,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:13:56,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:13:56,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:13:56,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:13:56,057 INFO L87 Difference]: Start difference. First operand 4884 states and 6701 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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) [2021-12-14 15:13:57,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:13:57,003 INFO L93 Difference]: Finished difference Result 7257 states and 10055 transitions. [2021-12-14 15:13:57,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:13:57,005 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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 73 [2021-12-14 15:13:57,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:13:57,009 INFO L225 Difference]: With dead ends: 7257 [2021-12-14 15:13:57,010 INFO L226 Difference]: Without dead ends: 4886 [2021-12-14 15:13:57,012 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 [2021-12-14 15:13:57,012 INFO L933 BasicCegarLoop]: 720 mSDtfsCounter, 328 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 1226 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:13:57,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 1226 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:13:57,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4886 states. [2021-12-14 15:13:57,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4886 to 4884. [2021-12-14 15:13:57,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4884 states, 4883 states have (on average 1.3614581200081917) internal successors, (6648), 4883 states have internal predecessors, (6648), 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) [2021-12-14 15:13:57,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4884 states to 4884 states and 6648 transitions. [2021-12-14 15:13:57,891 INFO L78 Accepts]: Start accepts. Automaton has 4884 states and 6648 transitions. Word has length 73 [2021-12-14 15:13:57,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:13:57,891 INFO L470 AbstractCegarLoop]: Abstraction has 4884 states and 6648 transitions. [2021-12-14 15:13:57,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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) [2021-12-14 15:13:57,891 INFO L276 IsEmpty]: Start isEmpty. Operand 4884 states and 6648 transitions. [2021-12-14 15:13:57,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-14 15:13:57,895 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:13:57,895 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] [2021-12-14 15:13:57,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-14 15:13:57,895 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:13:57,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:13:57,896 INFO L85 PathProgramCache]: Analyzing trace with hash -700390589, now seen corresponding path program 1 times [2021-12-14 15:13:57,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:13:57,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331836163] [2021-12-14 15:13:57,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:13:57,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:13:57,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:13:57,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:13:57,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:13:57,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331836163] [2021-12-14 15:13:57,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331836163] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:13:57,923 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:13:57,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:13:57,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253339351] [2021-12-14 15:13:57,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:13:57,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:13:57,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:13:57,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:13:57,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:13:57,924 INFO L87 Difference]: Start difference. First operand 4884 states and 6648 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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) [2021-12-14 15:13:59,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:13:59,395 INFO L93 Difference]: Finished difference Result 9617 states and 13272 transitions. [2021-12-14 15:13:59,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:13:59,395 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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 74 [2021-12-14 15:13:59,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:13:59,403 INFO L225 Difference]: With dead ends: 9617 [2021-12-14 15:13:59,403 INFO L226 Difference]: Without dead ends: 6869 [2021-12-14 15:13:59,406 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 [2021-12-14 15:13:59,407 INFO L933 BasicCegarLoop]: 423 mSDtfsCounter, 401 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:13:59,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [401 Valid, 576 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:13:59,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6869 states. [2021-12-14 15:14:00,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6869 to 6849. [2021-12-14 15:14:00,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6849 states, 6848 states have (on average 1.3828855140186915) internal successors, (9470), 6848 states have internal predecessors, (9470), 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) [2021-12-14 15:14:00,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6849 states to 6849 states and 9470 transitions. [2021-12-14 15:14:00,825 INFO L78 Accepts]: Start accepts. Automaton has 6849 states and 9470 transitions. Word has length 74 [2021-12-14 15:14:00,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:14:00,825 INFO L470 AbstractCegarLoop]: Abstraction has 6849 states and 9470 transitions. [2021-12-14 15:14:00,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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) [2021-12-14 15:14:00,826 INFO L276 IsEmpty]: Start isEmpty. Operand 6849 states and 9470 transitions. [2021-12-14 15:14:00,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-14 15:14:00,830 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:14:00,830 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] [2021-12-14 15:14:00,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-14 15:14:00,831 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:14:00,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:14:00,831 INFO L85 PathProgramCache]: Analyzing trace with hash -976483284, now seen corresponding path program 1 times [2021-12-14 15:14:00,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:14:00,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107210064] [2021-12-14 15:14:00,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:14:00,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:14:00,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:14:00,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:14:00,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:14:00,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107210064] [2021-12-14 15:14:00,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107210064] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:14:00,857 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:14:00,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:14:00,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662229690] [2021-12-14 15:14:00,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:14:00,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:14:00,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:14:00,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:14:00,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:14:00,858 INFO L87 Difference]: Start difference. First operand 6849 states and 9470 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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)