./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem17_label04.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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/eca-rers2012/Problem17_label04.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 49e10e55e7f24ac0e1cc4811d9fd20f6e770a7f556bf19e67f8acc4167c82fd3 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 09:34:54,586 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 09:34:54,587 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 09:34:54,646 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 09:34:54,649 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 09:34:54,652 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 09:34:54,655 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 09:34:54,658 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 09:34:54,659 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 09:34:54,663 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 09:34:54,663 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 09:34:54,664 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 09:34:54,665 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 09:34:54,666 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 09:34:54,667 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 09:34:54,669 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 09:34:54,670 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 09:34:54,670 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 09:34:54,673 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 09:34:54,677 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 09:34:54,678 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 09:34:54,679 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 09:34:54,680 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 09:34:54,680 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 09:34:54,685 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 09:34:54,685 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 09:34:54,685 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 09:34:54,687 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 09:34:54,687 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 09:34:54,688 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 09:34:54,688 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 09:34:54,689 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 09:34:54,690 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 09:34:54,691 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 09:34:54,691 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 09:34:54,692 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 09:34:54,692 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 09:34:54,692 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 09:34:54,692 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 09:34:54,694 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 09:34:54,694 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 09:34:54,695 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 09:34:54,718 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 09:34:54,718 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 09:34:54,719 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 09:34:54,719 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 09:34:54,719 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 09:34:54,720 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 09:34:54,720 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 09:34:54,720 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 09:34:54,720 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 09:34:54,721 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 09:34:54,721 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 09:34:54,721 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 09:34:54,721 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 09:34:54,722 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 09:34:54,722 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 09:34:54,722 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 09:34:54,722 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 09:34:54,722 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 09:34:54,722 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 09:34:54,722 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 09:34:54,723 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 09:34:54,723 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 09:34:54,723 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 09:34:54,723 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 09:34:54,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 09:34:54,723 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 09:34:54,724 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 09:34:54,724 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 09:34:54,724 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 09:34:54,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 09:34:54,725 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 09:34:54,725 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 09:34:54,725 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 09:34:54,726 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 09:34:54,726 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 49e10e55e7f24ac0e1cc4811d9fd20f6e770a7f556bf19e67f8acc4167c82fd3 [2021-12-22 09:34:54,902 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 09:34:54,934 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 09:34:54,936 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 09:34:54,936 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 09:34:54,937 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 09:34:54,938 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label04.c [2021-12-22 09:34:54,996 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfd561f0b/d0e8cf8ff3b241a09da5635a743b67cf/FLAG9f71382ec [2021-12-22 09:34:55,436 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 09:34:55,436 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label04.c [2021-12-22 09:34:55,454 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfd561f0b/d0e8cf8ff3b241a09da5635a743b67cf/FLAG9f71382ec [2021-12-22 09:34:55,768 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfd561f0b/d0e8cf8ff3b241a09da5635a743b67cf [2021-12-22 09:34:55,770 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 09:34:55,771 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 09:34:55,771 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 09:34:55,772 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 09:34:55,776 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 09:34:55,776 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:34:55" (1/1) ... [2021-12-22 09:34:55,777 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cdc8fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:34:55, skipping insertion in model container [2021-12-22 09:34:55,777 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:34:55" (1/1) ... [2021-12-22 09:34:55,784 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 09:34:55,852 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 09:34:56,039 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/eca-rers2012/Problem17_label04.c[3138,3151] [2021-12-22 09:34:56,470 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 09:34:56,476 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 09:34:56,522 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/eca-rers2012/Problem17_label04.c[3138,3151] [2021-12-22 09:34:56,750 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 09:34:56,761 INFO L208 MainTranslator]: Completed translation [2021-12-22 09:34:56,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:34:56 WrapperNode [2021-12-22 09:34:56,762 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 09:34:56,763 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 09:34:56,763 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 09:34:56,763 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 09:34:56,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:34:56" (1/1) ... [2021-12-22 09:34:56,800 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:34:56" (1/1) ... [2021-12-22 09:34:56,986 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2021-12-22 09:34:56,987 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 09:34:56,988 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 09:34:56,988 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 09:34:56,988 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 09:34:56,993 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:34:56" (1/1) ... [2021-12-22 09:34:56,994 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:34:56" (1/1) ... [2021-12-22 09:34:57,073 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:34:56" (1/1) ... [2021-12-22 09:34:57,075 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:34:56" (1/1) ... [2021-12-22 09:34:57,152 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:34:56" (1/1) ... [2021-12-22 09:34:57,170 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:34:56" (1/1) ... [2021-12-22 09:34:57,195 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:34:56" (1/1) ... [2021-12-22 09:34:57,231 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 09:34:57,233 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 09:34:57,234 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 09:34:57,237 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 09:34:57,238 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:34:56" (1/1) ... [2021-12-22 09:34:57,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 09:34:57,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:34:57,263 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) [2021-12-22 09:34:57,275 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 [2021-12-22 09:34:57,290 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 09:34:57,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 09:34:57,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 09:34:57,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 09:34:57,334 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 09:34:57,335 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 09:34:59,621 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 09:34:59,634 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 09:34:59,635 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-22 09:34:59,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:34:59 BoogieIcfgContainer [2021-12-22 09:34:59,637 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 09:34:59,638 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 09:34:59,639 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 09:34:59,641 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 09:34:59,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:34:55" (1/3) ... [2021-12-22 09:34:59,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d8f7775 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:34:59, skipping insertion in model container [2021-12-22 09:34:59,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:34:56" (2/3) ... [2021-12-22 09:34:59,643 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d8f7775 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:34:59, skipping insertion in model container [2021-12-22 09:34:59,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:34:59" (3/3) ... [2021-12-22 09:34:59,644 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label04.c [2021-12-22 09:34:59,650 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 09:34:59,650 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 09:34:59,695 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 09:34:59,701 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 [2021-12-22 09:34:59,702 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 09:34:59,723 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:34:59,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-22 09:34:59,727 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:34:59,727 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] [2021-12-22 09:34:59,728 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:34:59,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:34:59,731 INFO L85 PathProgramCache]: Analyzing trace with hash -279853278, now seen corresponding path program 1 times [2021-12-22 09:34:59,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:34:59,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721266876] [2021-12-22 09:34:59,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:34:59,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:34:59,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:34:59,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:34:59,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:34:59,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721266876] [2021-12-22 09:34:59,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721266876] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:34:59,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:34:59,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:34:59,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091794887] [2021-12-22 09:34:59,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:34:59,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:34:59,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:34:59,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:34:59,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:34:59,944 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:35:02,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:35:02,213 INFO L93 Difference]: Finished difference Result 1644 states and 3029 transitions. [2021-12-22 09:35:02,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:35:02,216 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-22 09:35:02,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:35:02,229 INFO L225 Difference]: With dead ends: 1644 [2021-12-22 09:35:02,230 INFO L226 Difference]: Without dead ends: 977 [2021-12-22 09:35:02,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:35:02,239 INFO L933 BasicCegarLoop]: 425 mSDtfsCounter, 468 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 1470 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 1802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 1470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-22 09:35:02,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [468 Valid, 503 Invalid, 1802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 1470 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-22 09:35:02,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2021-12-22 09:35:02,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 971. [2021-12-22 09:35:02,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 970 states have (on average 1.5536082474226804) internal successors, (1507), 970 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:35:02,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 1507 transitions. [2021-12-22 09:35:02,316 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 1507 transitions. Word has length 20 [2021-12-22 09:35:02,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:35:02,316 INFO L470 AbstractCegarLoop]: Abstraction has 971 states and 1507 transitions. [2021-12-22 09:35:02,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:35:02,317 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 1507 transitions. [2021-12-22 09:35:02,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-22 09:35:02,318 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:35:02,319 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:35:02,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 09:35:02,319 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:35:02,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:35:02,320 INFO L85 PathProgramCache]: Analyzing trace with hash -560555142, now seen corresponding path program 1 times [2021-12-22 09:35:02,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:35:02,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381693462] [2021-12-22 09:35:02,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:35:02,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:35:02,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:35:02,428 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:35:02,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:35:02,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381693462] [2021-12-22 09:35:02,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381693462] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:35:02,429 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:35:02,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:35:02,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232451179] [2021-12-22 09:35:02,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:35:02,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:35:02,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:35:02,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:35:02,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:35:02,433 INFO L87 Difference]: Start difference. First operand 971 states and 1507 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:35:04,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:35:04,391 INFO L93 Difference]: Finished difference Result 2813 states and 4381 transitions. [2021-12-22 09:35:04,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:35:04,392 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 0 states have call successors, (0), 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 87 [2021-12-22 09:35:04,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:35:04,398 INFO L225 Difference]: With dead ends: 2813 [2021-12-22 09:35:04,398 INFO L226 Difference]: Without dead ends: 1844 [2021-12-22 09:35:04,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:35:04,401 INFO L933 BasicCegarLoop]: 506 mSDtfsCounter, 405 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1381 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 1706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 1381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-22 09:35:04,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 579 Invalid, 1706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 1381 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-22 09:35:04,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-12-22 09:35:04,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1841. [2021-12-22 09:35:04,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1840 states have (on average 1.35) internal successors, (2484), 1840 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:35:04,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 2484 transitions. [2021-12-22 09:35:04,431 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 2484 transitions. Word has length 87 [2021-12-22 09:35:04,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:35:04,431 INFO L470 AbstractCegarLoop]: Abstraction has 1841 states and 2484 transitions. [2021-12-22 09:35:04,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:35:04,432 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 2484 transitions. [2021-12-22 09:35:04,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-22 09:35:04,433 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:35:04,433 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:35:04,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 09:35:04,434 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:35:04,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:35:04,434 INFO L85 PathProgramCache]: Analyzing trace with hash 405382798, now seen corresponding path program 1 times [2021-12-22 09:35:04,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:35:04,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499567008] [2021-12-22 09:35:04,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:35:04,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:35:04,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:35:04,536 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:35:04,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:35:04,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499567008] [2021-12-22 09:35:04,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499567008] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:35:04,538 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:35:04,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:35:04,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114956658] [2021-12-22 09:35:04,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:35:04,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:35:04,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:35:04,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:35:04,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:35:04,541 INFO L87 Difference]: Start difference. First operand 1841 states and 2484 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:35:06,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:35:06,354 INFO L93 Difference]: Finished difference Result 4552 states and 6282 transitions. [2021-12-22 09:35:06,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:35:06,354 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 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 90 [2021-12-22 09:35:06,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:35:06,363 INFO L225 Difference]: With dead ends: 4552 [2021-12-22 09:35:06,364 INFO L226 Difference]: Without dead ends: 2713 [2021-12-22 09:35:06,367 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 [2021-12-22 09:35:06,372 INFO L933 BasicCegarLoop]: 818 mSDtfsCounter, 487 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1264 mSolverCounterSat, 415 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 1679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 415 IncrementalHoareTripleChecker+Valid, 1264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-22 09:35:06,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 886 Invalid, 1679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [415 Valid, 1264 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-22 09:35:06,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2021-12-22 09:35:06,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 2711. [2021-12-22 09:35:06,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2711 states, 2710 states have (on average 1.3003690036900368) internal successors, (3524), 2710 states have internal predecessors, (3524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:35:06,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2711 states to 2711 states and 3524 transitions. [2021-12-22 09:35:06,418 INFO L78 Accepts]: Start accepts. Automaton has 2711 states and 3524 transitions. Word has length 90 [2021-12-22 09:35:06,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:35:06,419 INFO L470 AbstractCegarLoop]: Abstraction has 2711 states and 3524 transitions. [2021-12-22 09:35:06,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:35:06,420 INFO L276 IsEmpty]: Start isEmpty. Operand 2711 states and 3524 transitions. [2021-12-22 09:35:06,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-22 09:35:06,428 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:35:06,428 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:35:06,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 09:35:06,429 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:35:06,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:35:06,429 INFO L85 PathProgramCache]: Analyzing trace with hash -41455991, now seen corresponding path program 1 times [2021-12-22 09:35:06,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:35:06,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102907363] [2021-12-22 09:35:06,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:35:06,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:35:06,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:35:06,511 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-22 09:35:06,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:35:06,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102907363] [2021-12-22 09:35:06,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102907363] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:35:06,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:35:06,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:35:06,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617894438] [2021-12-22 09:35:06,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:35:06,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:35:06,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:35:06,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:35:06,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:35:06,514 INFO L87 Difference]: Start difference. First operand 2711 states and 3524 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:35:08,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:35:08,093 INFO L93 Difference]: Finished difference Result 7984 states and 10361 transitions. [2021-12-22 09:35:08,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:35:08,094 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 0 states have call successors, (0), 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 159 [2021-12-22 09:35:08,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:35:08,104 INFO L225 Difference]: With dead ends: 7984 [2021-12-22 09:35:08,105 INFO L226 Difference]: Without dead ends: 4421 [2021-12-22 09:35:08,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:35:08,109 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 386 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-22 09:35:08,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-22 09:35:08,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4421 states. [2021-12-22 09:35:08,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4421 to 3571. [2021-12-22 09:35:08,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3571 states, 3570 states have (on average 1.1775910364145659) internal successors, (4204), 3570 states have internal predecessors, (4204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:35:08,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3571 states to 3571 states and 4204 transitions. [2021-12-22 09:35:08,152 INFO L78 Accepts]: Start accepts. Automaton has 3571 states and 4204 transitions. Word has length 159 [2021-12-22 09:35:08,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:35:08,152 INFO L470 AbstractCegarLoop]: Abstraction has 3571 states and 4204 transitions. [2021-12-22 09:35:08,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:35:08,153 INFO L276 IsEmpty]: Start isEmpty. Operand 3571 states and 4204 transitions. [2021-12-22 09:35:08,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-12-22 09:35:08,154 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:35:08,154 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:35:08,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 09:35:08,154 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:35:08,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:35:08,155 INFO L85 PathProgramCache]: Analyzing trace with hash -695550011, now seen corresponding path program 1 times [2021-12-22 09:35:08,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:35:08,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960577278] [2021-12-22 09:35:08,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:35:08,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:35:08,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:35:08,283 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:35:08,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:35:08,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960577278] [2021-12-22 09:35:08,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960577278] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:35:08,284 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:35:08,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:35:08,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147265717] [2021-12-22 09:35:08,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:35:08,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:35:08,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:35:08,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:35:08,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:35:08,285 INFO L87 Difference]: Start difference. First operand 3571 states and 4204 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:35:09,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:35:09,619 INFO L93 Difference]: Finished difference Result 9273 states and 11087 transitions. [2021-12-22 09:35:09,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:35:09,620 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 172 [2021-12-22 09:35:09,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:35:09,633 INFO L225 Difference]: With dead ends: 9273 [2021-12-22 09:35:09,633 INFO L226 Difference]: Without dead ends: 5704 [2021-12-22 09:35:09,638 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 [2021-12-22 09:35:09,638 INFO L933 BasicCegarLoop]: 726 mSDtfsCounter, 496 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-22 09:35:09,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 784 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-22 09:35:09,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5704 states. [2021-12-22 09:35:09,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5704 to 5704. [2021-12-22 09:35:09,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5704 states, 5703 states have (on average 1.1595651411537786) internal successors, (6613), 5703 states have internal predecessors, (6613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:35:09,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5704 states to 5704 states and 6613 transitions. [2021-12-22 09:35:09,713 INFO L78 Accepts]: Start accepts. Automaton has 5704 states and 6613 transitions. Word has length 172 [2021-12-22 09:35:09,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:35:09,714 INFO L470 AbstractCegarLoop]: Abstraction has 5704 states and 6613 transitions. [2021-12-22 09:35:09,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:35:09,717 INFO L276 IsEmpty]: Start isEmpty. Operand 5704 states and 6613 transitions. [2021-12-22 09:35:09,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-12-22 09:35:09,718 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:35:09,719 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:35:09,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 09:35:09,720 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:35:09,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:35:09,720 INFO L85 PathProgramCache]: Analyzing trace with hash -487366976, now seen corresponding path program 1 times [2021-12-22 09:35:09,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:35:09,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68009302] [2021-12-22 09:35:09,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:35:09,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:35:09,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:35:09,808 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-22 09:35:09,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:35:09,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68009302] [2021-12-22 09:35:09,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68009302] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:35:09,809 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:35:09,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:35:09,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832667367] [2021-12-22 09:35:09,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:35:09,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:35:09,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:35:09,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:35:09,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:35:09,811 INFO L87 Difference]: Start difference. First operand 5704 states and 6613 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:35:11,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:35:11,387 INFO L93 Difference]: Finished difference Result 14376 states and 16776 transitions. [2021-12-22 09:35:11,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:35:11,392 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2021-12-22 09:35:11,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:35:11,416 INFO L225 Difference]: With dead ends: 14376 [2021-12-22 09:35:11,416 INFO L226 Difference]: Without dead ends: 8673 [2021-12-22 09:35:11,423 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 [2021-12-22 09:35:11,424 INFO L933 BasicCegarLoop]: 382 mSDtfsCounter, 431 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-22 09:35:11,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [431 Valid, 444 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-22 09:35:11,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8673 states. [2021-12-22 09:35:11,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8673 to 5677. [2021-12-22 09:35:11,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5677 states, 5676 states have (on average 1.1578576462297392) internal successors, (6572), 5676 states have internal predecessors, (6572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:35:11,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5677 states to 5677 states and 6572 transitions. [2021-12-22 09:35:11,503 INFO L78 Accepts]: Start accepts. Automaton has 5677 states and 6572 transitions. Word has length 174 [2021-12-22 09:35:11,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:35:11,504 INFO L470 AbstractCegarLoop]: Abstraction has 5677 states and 6572 transitions. [2021-12-22 09:35:11,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:35:11,504 INFO L276 IsEmpty]: Start isEmpty. Operand 5677 states and 6572 transitions. [2021-12-22 09:35:11,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-12-22 09:35:11,507 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:35:11,507 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:35:11,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 09:35:11,508 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:35:11,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:35:11,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1861125085, now seen corresponding path program 1 times [2021-12-22 09:35:11,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:35:11,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700663381] [2021-12-22 09:35:11,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:35:11,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:35:11,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:35:11,611 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 186 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-22 09:35:11,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:35:11,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700663381] [2021-12-22 09:35:11,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700663381] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:35:11,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:35:11,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:35:11,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321187905] [2021-12-22 09:35:11,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:35:11,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:35:11,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:35:11,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:35:11,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:35:11,613 INFO L87 Difference]: Start difference. First operand 5677 states and 6572 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:35:13,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:35:13,558 INFO L93 Difference]: Finished difference Result 13935 states and 16238 transitions. [2021-12-22 09:35:13,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:35:13,559 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 252 [2021-12-22 09:35:13,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:35:13,576 INFO L225 Difference]: With dead ends: 13935 [2021-12-22 09:35:13,576 INFO L226 Difference]: Without dead ends: 7832 [2021-12-22 09:35:13,581 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 [2021-12-22 09:35:13,582 INFO L933 BasicCegarLoop]: 586 mSDtfsCounter, 495 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 1588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-22 09:35:13,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [495 Valid, 629 Invalid, 1588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 1238 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-22 09:35:13,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7832 states. [2021-12-22 09:35:13,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7832 to 7402. [2021-12-22 09:35:13,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7402 states, 7401 states have (on average 1.1638967707066612) internal successors, (8614), 7401 states have internal predecessors, (8614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:35:13,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7402 states to 7402 states and 8614 transitions. [2021-12-22 09:35:13,697 INFO L78 Accepts]: Start accepts. Automaton has 7402 states and 8614 transitions. Word has length 252 [2021-12-22 09:35:13,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:35:13,698 INFO L470 AbstractCegarLoop]: Abstraction has 7402 states and 8614 transitions. [2021-12-22 09:35:13,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:35:13,699 INFO L276 IsEmpty]: Start isEmpty. Operand 7402 states and 8614 transitions. [2021-12-22 09:35:13,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2021-12-22 09:35:13,701 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:35:13,701 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:35:13,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 09:35:13,702 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:35:13,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:35:13,703 INFO L85 PathProgramCache]: Analyzing trace with hash 625857440, now seen corresponding path program 1 times [2021-12-22 09:35:13,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:35:13,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279302857] [2021-12-22 09:35:13,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:35:13,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:35:13,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:35:13,797 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 196 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-22 09:35:13,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:35:13,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279302857] [2021-12-22 09:35:13,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279302857] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:35:13,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:35:13,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:35:13,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401773582] [2021-12-22 09:35:13,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:35:13,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:35:13,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:35:13,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:35:13,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:35:13,799 INFO L87 Difference]: Start difference. First operand 7402 states and 8614 transitions. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:35:15,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:35:15,292 INFO L93 Difference]: Finished difference Result 19038 states and 22311 transitions. [2021-12-22 09:35:15,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:35:15,292 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 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 257 [2021-12-22 09:35:15,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:35:15,318 INFO L225 Difference]: With dead ends: 19038 [2021-12-22 09:35:15,318 INFO L226 Difference]: Without dead ends: 11213 [2021-12-22 09:35:15,325 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 [2021-12-22 09:35:15,327 INFO L933 BasicCegarLoop]: 775 mSDtfsCounter, 379 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 1445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 1196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:35:15,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 842 Invalid, 1445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 1196 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-22 09:35:15,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11213 states. [2021-12-22 09:35:15,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11213 to 10363. [2021-12-22 09:35:15,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10363 states, 10362 states have (on average 1.132117351862575) internal successors, (11731), 10362 states have internal predecessors, (11731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:35:15,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10363 states to 10363 states and 11731 transitions. [2021-12-22 09:35:15,429 INFO L78 Accepts]: Start accepts. Automaton has 10363 states and 11731 transitions. Word has length 257 [2021-12-22 09:35:15,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:35:15,431 INFO L470 AbstractCegarLoop]: Abstraction has 10363 states and 11731 transitions. [2021-12-22 09:35:15,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:35:15,432 INFO L276 IsEmpty]: Start isEmpty. Operand 10363 states and 11731 transitions. [2021-12-22 09:35:15,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2021-12-22 09:35:15,434 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:35:15,435 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:35:15,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 09:35:15,436 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:35:15,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:35:15,436 INFO L85 PathProgramCache]: Analyzing trace with hash 680789272, now seen corresponding path program 1 times [2021-12-22 09:35:15,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:35:15,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110625952] [2021-12-22 09:35:15,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:35:15,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:35:15,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:35:15,518 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 186 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-22 09:35:15,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:35:15,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110625952] [2021-12-22 09:35:15,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110625952] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:35:15,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:35:15,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:35:15,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385916579] [2021-12-22 09:35:15,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:35:15,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:35:15,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:35:15,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:35:15,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:35:15,520 INFO L87 Difference]: Start difference. First operand 10363 states and 11731 transitions. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:35:17,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:35:17,113 INFO L93 Difference]: Finished difference Result 24567 states and 27907 transitions. [2021-12-22 09:35:17,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:35:17,114 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 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 275 [2021-12-22 09:35:17,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:35:17,132 INFO L225 Difference]: With dead ends: 24567 [2021-12-22 09:35:17,133 INFO L226 Difference]: Without dead ends: 13774 [2021-12-22 09:35:17,141 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 [2021-12-22 09:35:17,142 INFO L933 BasicCegarLoop]: 245 mSDtfsCounter, 444 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1279 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 1507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 1279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-22 09:35:17,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [444 Valid, 295 Invalid, 1507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 1279 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-22 09:35:17,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13774 states. [2021-12-22 09:35:17,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13774 to 12918. [2021-12-22 09:35:17,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12918 states, 12917 states have (on average 1.1388867384067507) internal successors, (14711), 12917 states have internal predecessors, (14711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:35:17,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12918 states to 12918 states and 14711 transitions. [2021-12-22 09:35:17,265 INFO L78 Accepts]: Start accepts. Automaton has 12918 states and 14711 transitions. Word has length 275 [2021-12-22 09:35:17,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:35:17,266 INFO L470 AbstractCegarLoop]: Abstraction has 12918 states and 14711 transitions. [2021-12-22 09:35:17,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:35:17,266 INFO L276 IsEmpty]: Start isEmpty. Operand 12918 states and 14711 transitions. [2021-12-22 09:35:17,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2021-12-22 09:35:17,269 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:35:17,269 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:35:17,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 09:35:17,269 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:35:17,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:35:17,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1540121653, now seen corresponding path program 1 times [2021-12-22 09:35:17,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:35:17,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42505528] [2021-12-22 09:35:17,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:35:17,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:35:17,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:35:17,366 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 196 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-22 09:35:17,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:35:17,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42505528] [2021-12-22 09:35:17,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42505528] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:35:17,366 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:35:17,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 09:35:17,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731874189] [2021-12-22 09:35:17,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:35:17,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:35:17,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:35:17,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:35:17,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:35:17,368 INFO L87 Difference]: Start difference. First operand 12918 states and 14711 transitions. Second operand has 4 states, 4 states have (on average 49.75) internal successors, (199), 4 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:35:20,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:35:20,291 INFO L93 Difference]: Finished difference Result 46351 states and 52889 transitions. [2021-12-22 09:35:20,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:35:20,292 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 49.75) internal successors, (199), 4 states have internal predecessors, (199), 0 states have call successors, (0), 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 280 [2021-12-22 09:35:20,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:35:20,338 INFO L225 Difference]: With dead ends: 46351 [2021-12-22 09:35:20,338 INFO L226 Difference]: Without dead ends: 32154 [2021-12-22 09:35:20,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:35:20,349 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 897 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 2796 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 897 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 3240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 2796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-22 09:35:20,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [897 Valid, 336 Invalid, 3240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 2796 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-22 09:35:20,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32154 states. [2021-12-22 09:35:20,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32154 to 31677. [2021-12-22 09:35:20,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31677 states, 31676 states have (on average 1.1246685187523677) internal successors, (35625), 31676 states have internal predecessors, (35625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:35:20,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31677 states to 31677 states and 35625 transitions. [2021-12-22 09:35:20,666 INFO L78 Accepts]: Start accepts. Automaton has 31677 states and 35625 transitions. Word has length 280 [2021-12-22 09:35:20,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:35:20,667 INFO L470 AbstractCegarLoop]: Abstraction has 31677 states and 35625 transitions. [2021-12-22 09:35:20,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.75) internal successors, (199), 4 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:35:20,667 INFO L276 IsEmpty]: Start isEmpty. Operand 31677 states and 35625 transitions. [2021-12-22 09:35:20,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2021-12-22 09:35:20,670 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:35:20,671 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:35:20,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 09:35:20,672 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:35:20,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:35:20,672 INFO L85 PathProgramCache]: Analyzing trace with hash -2068453589, now seen corresponding path program 1 times [2021-12-22 09:35:20,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:35:20,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319568220] [2021-12-22 09:35:20,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:35:20,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:35:20,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:35:20,766 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-22 09:35:20,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:35:20,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319568220] [2021-12-22 09:35:20,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319568220] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:35:20,767 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:35:20,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:35:20,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504017477] [2021-12-22 09:35:20,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:35:20,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:35:20,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:35:20,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:35:20,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:35:20,768 INFO L87 Difference]: Start difference. First operand 31677 states and 35625 transitions. Second operand has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:35:22,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:35:22,524 INFO L93 Difference]: Finished difference Result 76998 states and 86991 transitions. [2021-12-22 09:35:22,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:35:22,525 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 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 309 [2021-12-22 09:35:22,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:35:22,570 INFO L225 Difference]: With dead ends: 76998 [2021-12-22 09:35:22,571 INFO L226 Difference]: Without dead ends: 44894 [2021-12-22 09:35:22,594 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 [2021-12-22 09:35:22,594 INFO L933 BasicCegarLoop]: 364 mSDtfsCounter, 464 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1299 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 1506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 1299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-22 09:35:22,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [464 Valid, 426 Invalid, 1506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 1299 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-22 09:35:22,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44894 states. [2021-12-22 09:35:23,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44894 to 43162. [2021-12-22 09:35:23,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43162 states, 43161 states have (on average 1.1074117837862885) internal successors, (47797), 43161 states have internal predecessors, (47797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:35:23,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43162 states to 43162 states and 47797 transitions. [2021-12-22 09:35:23,147 INFO L78 Accepts]: Start accepts. Automaton has 43162 states and 47797 transitions. Word has length 309 [2021-12-22 09:35:23,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:35:23,148 INFO L470 AbstractCegarLoop]: Abstraction has 43162 states and 47797 transitions. [2021-12-22 09:35:23,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:35:23,148 INFO L276 IsEmpty]: Start isEmpty. Operand 43162 states and 47797 transitions. [2021-12-22 09:35:23,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2021-12-22 09:35:23,157 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:35:23,157 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:35:23,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 09:35:23,158 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:35:23,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:35:23,158 INFO L85 PathProgramCache]: Analyzing trace with hash 856418989, now seen corresponding path program 1 times [2021-12-22 09:35:23,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:35:23,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322832274] [2021-12-22 09:35:23,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:35:23,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:35:23,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:35:23,308 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 217 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:35:23,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:35:23,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322832274] [2021-12-22 09:35:23,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322832274] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:35:23,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905120074] [2021-12-22 09:35:23,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:35:23,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:35:23,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:35:23,311 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 09:35:23,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 09:35:23,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:35:23,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-22 09:35:23,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:35:24,128 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 222 proven. 82 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-22 09:35:24,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 09:35:25,238 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 222 proven. 82 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-22 09:35:25,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905120074] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 09:35:25,238 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 09:35:25,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 9 [2021-12-22 09:35:25,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031721681] [2021-12-22 09:35:25,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 09:35:25,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 09:35:25,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:35:25,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 09:35:25,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-22 09:35:25,334 INFO L87 Difference]: Start difference. First operand 43162 states and 47797 transitions. Second operand has 9 states, 9 states have (on average 89.0) internal successors, (801), 9 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:35:36,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:35:36,866 INFO L93 Difference]: Finished difference Result 163441 states and 181226 transitions. [2021-12-22 09:35:36,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-22 09:35:36,866 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 89.0) internal successors, (801), 9 states have internal predecessors, (801), 0 states have call successors, (0), 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 315 [2021-12-22 09:35:36,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:35:37,009 INFO L225 Difference]: With dead ends: 163441 [2021-12-22 09:35:37,009 INFO L226 Difference]: Without dead ends: 116020 [2021-12-22 09:35:37,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 661 GetRequests, 640 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=353, Unknown=0, NotChecked=0, Total=506 [2021-12-22 09:35:37,051 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 13031 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 11677 mSolverCounterSat, 2675 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13031 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 14352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2675 IncrementalHoareTripleChecker+Valid, 11677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2021-12-22 09:35:37,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13031 Valid, 470 Invalid, 14352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2675 Valid, 11677 Invalid, 0 Unknown, 0 Unchecked, 10.5s Time] [2021-12-22 09:35:37,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116020 states. [2021-12-22 09:35:38,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116020 to 92127. [2021-12-22 09:35:38,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92127 states, 92126 states have (on average 1.1032933156763562) internal successors, (101642), 92126 states have internal predecessors, (101642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:35:38,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92127 states to 92127 states and 101642 transitions. [2021-12-22 09:35:38,277 INFO L78 Accepts]: Start accepts. Automaton has 92127 states and 101642 transitions. Word has length 315 [2021-12-22 09:35:38,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:35:38,277 INFO L470 AbstractCegarLoop]: Abstraction has 92127 states and 101642 transitions. [2021-12-22 09:35:38,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 89.0) internal successors, (801), 9 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:35:38,277 INFO L276 IsEmpty]: Start isEmpty. Operand 92127 states and 101642 transitions. [2021-12-22 09:35:38,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2021-12-22 09:35:38,281 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:35:38,281 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:35:38,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 09:35:38,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-22 09:35:38,499 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:35:38,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:35:38,500 INFO L85 PathProgramCache]: Analyzing trace with hash 2052661774, now seen corresponding path program 1 times [2021-12-22 09:35:38,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:35:38,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031869190] [2021-12-22 09:35:38,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:35:38,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:35:38,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:35:38,618 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 233 proven. 82 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-22 09:35:38,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:35:38,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031869190] [2021-12-22 09:35:38,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031869190] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:35:38,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597828002] [2021-12-22 09:35:38,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:35:38,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:35:38,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:35:38,620 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 09:35:38,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 09:35:38,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:35:38,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 09:35:38,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:35:40,110 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 233 proven. 82 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-22 09:35:40,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 09:35:41,954 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 233 proven. 82 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-22 09:35:41,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597828002] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 09:35:41,955 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 09:35:41,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2021-12-22 09:35:41,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51922364] [2021-12-22 09:35:41,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 09:35:41,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 09:35:41,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:35:41,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 09:35:41,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-12-22 09:35:41,957 INFO L87 Difference]: Start difference. First operand 92127 states and 101642 transitions. Second operand has 8 states, 8 states have (on average 101.75) internal successors, (814), 7 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:35:48,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:35:48,486 INFO L93 Difference]: Finished difference Result 217453 states and 240266 transitions. [2021-12-22 09:35:48,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 09:35:48,486 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 101.75) internal successors, (814), 7 states have internal predecessors, (814), 0 states have call successors, (0), 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 367 [2021-12-22 09:35:48,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:35:48,634 INFO L225 Difference]: With dead ends: 217453 [2021-12-22 09:35:48,634 INFO L226 Difference]: Without dead ends: 125753 [2021-12-22 09:35:48,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 736 GetRequests, 729 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-12-22 09:35:48,692 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 2989 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 5537 mSolverCounterSat, 1222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2989 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 6759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1222 IncrementalHoareTripleChecker+Valid, 5537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-12-22 09:35:48,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2989 Valid, 337 Invalid, 6759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1222 Valid, 5537 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2021-12-22 09:35:48,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125753 states. [2021-12-22 09:35:50,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125753 to 109138. [2021-12-22 09:35:50,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109138 states, 109137 states have (on average 1.1063159148593054) internal successors, (120740), 109137 states have internal predecessors, (120740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:35:50,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109138 states to 109138 states and 120740 transitions. [2021-12-22 09:35:50,215 INFO L78 Accepts]: Start accepts. Automaton has 109138 states and 120740 transitions. Word has length 367 [2021-12-22 09:35:50,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:35:50,216 INFO L470 AbstractCegarLoop]: Abstraction has 109138 states and 120740 transitions. [2021-12-22 09:35:50,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 101.75) internal successors, (814), 7 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:35:50,216 INFO L276 IsEmpty]: Start isEmpty. Operand 109138 states and 120740 transitions. [2021-12-22 09:35:50,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2021-12-22 09:35:50,219 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:35:50,219 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:35:50,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 09:35:50,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-22 09:35:50,427 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:35:50,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:35:50,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1212771369, now seen corresponding path program 1 times [2021-12-22 09:35:50,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:35:50,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671215720] [2021-12-22 09:35:50,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:35:50,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:35:50,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:35:50,549 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-22 09:35:50,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:35:50,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671215720] [2021-12-22 09:35:50,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671215720] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:35:50,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:35:50,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:35:50,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335026872] [2021-12-22 09:35:50,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:35:50,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:35:50,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:35:50,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:35:50,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:35:50,553 INFO L87 Difference]: Start difference. First operand 109138 states and 120740 transitions. Second operand has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:35:52,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:35:52,678 INFO L93 Difference]: Finished difference Result 214861 states and 237724 transitions. [2021-12-22 09:35:52,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:35:52,678 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 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 389 [2021-12-22 09:35:52,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:35:52,838 INFO L225 Difference]: With dead ends: 214861 [2021-12-22 09:35:52,838 INFO L226 Difference]: Without dead ends: 106149 [2021-12-22 09:35:52,895 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 [2021-12-22 09:35:52,895 INFO L933 BasicCegarLoop]: 657 mSDtfsCounter, 481 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 1192 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 1328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-22 09:35:52,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [481 Valid, 720 Invalid, 1328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1192 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-22 09:35:52,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106149 states. [2021-12-22 09:35:54,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106149 to 104443. [2021-12-22 09:35:54,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104443 states, 104442 states have (on average 1.0791348308151893) internal successors, (112707), 104442 states have internal predecessors, (112707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:35:54,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104443 states to 104443 states and 112707 transitions. [2021-12-22 09:35:54,404 INFO L78 Accepts]: Start accepts. Automaton has 104443 states and 112707 transitions. Word has length 389 [2021-12-22 09:35:54,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:35:54,404 INFO L470 AbstractCegarLoop]: Abstraction has 104443 states and 112707 transitions. [2021-12-22 09:35:54,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:35:54,404 INFO L276 IsEmpty]: Start isEmpty. Operand 104443 states and 112707 transitions. [2021-12-22 09:35:54,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-12-22 09:35:54,409 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:35:54,410 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:35:54,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 09:35:54,410 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:35:54,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:35:54,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1565966588, now seen corresponding path program 1 times [2021-12-22 09:35:54,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:35:54,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40975755] [2021-12-22 09:35:54,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:35:54,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:35:54,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:35:54,575 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 351 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-12-22 09:35:54,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:35:54,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40975755] [2021-12-22 09:35:54,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40975755] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:35:54,576 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:35:54,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:35:54,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280026416] [2021-12-22 09:35:54,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:35:54,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:35:54,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:35:54,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:35:54,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:35:54,577 INFO L87 Difference]: Start difference. First operand 104443 states and 112707 transitions. Second operand has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)