./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pals_lcr.7.ufo.BOUNDED-14.pals+Problem12_label03.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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/combinations/pals_lcr.7.ufo.BOUNDED-14.pals+Problem12_label03.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 d295d755d44127829d46828e377e22a38631a635ad7a6b559c09be673317721a --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 14:44:07,646 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 14:44:07,648 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 14:44:07,706 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 14:44:07,707 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 14:44:07,710 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 14:44:07,711 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 14:44:07,714 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 14:44:07,716 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 14:44:07,720 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 14:44:07,721 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 14:44:07,722 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 14:44:07,723 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 14:44:07,725 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 14:44:07,726 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 14:44:07,729 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 14:44:07,730 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 14:44:07,731 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 14:44:07,733 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 14:44:07,738 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 14:44:07,739 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 14:44:07,740 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 14:44:07,742 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 14:44:07,743 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 14:44:07,749 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 14:44:07,749 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 14:44:07,750 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 14:44:07,751 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 14:44:07,751 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 14:44:07,752 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 14:44:07,753 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 14:44:07,753 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 14:44:07,755 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 14:44:07,756 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 14:44:07,757 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 14:44:07,757 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 14:44:07,758 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 14:44:07,758 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 14:44:07,758 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 14:44:07,759 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 14:44:07,760 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 14:44:07,761 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 14:44:07,793 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 14:44:07,793 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 14:44:07,794 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 14:44:07,794 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 14:44:07,795 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 14:44:07,795 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 14:44:07,796 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 14:44:07,796 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 14:44:07,796 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 14:44:07,796 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 14:44:07,797 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 14:44:07,797 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 14:44:07,798 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 14:44:07,798 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 14:44:07,798 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 14:44:07,798 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 14:44:07,798 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 14:44:07,799 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 14:44:07,799 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 14:44:07,799 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 14:44:07,799 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 14:44:07,800 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 14:44:07,800 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 14:44:07,800 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 14:44:07,800 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 14:44:07,800 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 14:44:07,801 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 14:44:07,802 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 14:44:07,802 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 14:44:07,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 14:44:07,803 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 14:44:07,803 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 14:44:07,803 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 14:44:07,803 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 14:44:07,804 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d295d755d44127829d46828e377e22a38631a635ad7a6b559c09be673317721a [2021-12-21 14:44:08,039 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 14:44:08,058 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 14:44:08,060 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 14:44:08,061 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 14:44:08,062 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 14:44:08,063 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.7.ufo.BOUNDED-14.pals+Problem12_label03.c [2021-12-21 14:44:08,129 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f120283c3/1fcd0e648f2c4e159b74dcc30bd2773a/FLAG0e6da9a85 [2021-12-21 14:44:08,828 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 14:44:08,829 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.7.ufo.BOUNDED-14.pals+Problem12_label03.c [2021-12-21 14:44:08,866 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f120283c3/1fcd0e648f2c4e159b74dcc30bd2773a/FLAG0e6da9a85 [2021-12-21 14:44:08,960 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f120283c3/1fcd0e648f2c4e159b74dcc30bd2773a [2021-12-21 14:44:08,964 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 14:44:08,966 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 14:44:08,969 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 14:44:08,970 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 14:44:08,973 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 14:44:08,974 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 02:44:08" (1/1) ... [2021-12-21 14:44:08,975 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cbd4006 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:44:08, skipping insertion in model container [2021-12-21 14:44:08,976 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 02:44:08" (1/1) ... [2021-12-21 14:44:08,982 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 14:44:09,108 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 14:44:09,503 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/combinations/pals_lcr.7.ufo.BOUNDED-14.pals+Problem12_label03.c[20426,20439] [2021-12-21 14:44:09,548 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/combinations/pals_lcr.7.ufo.BOUNDED-14.pals+Problem12_label03.c[22763,22776] [2021-12-21 14:44:10,188 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 14:44:10,196 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 14:44:10,234 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/combinations/pals_lcr.7.ufo.BOUNDED-14.pals+Problem12_label03.c[20426,20439] [2021-12-21 14:44:10,247 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/combinations/pals_lcr.7.ufo.BOUNDED-14.pals+Problem12_label03.c[22763,22776] [2021-12-21 14:44:10,650 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 14:44:10,675 INFO L208 MainTranslator]: Completed translation [2021-12-21 14:44:10,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:44:10 WrapperNode [2021-12-21 14:44:10,676 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 14:44:10,677 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 14:44:10,677 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 14:44:10,677 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 14:44:10,683 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:44:10" (1/1) ... [2021-12-21 14:44:10,745 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:44:10" (1/1) ... [2021-12-21 14:44:11,121 INFO L137 Inliner]: procedures = 38, calls = 24, calls flagged for inlining = 19, calls inlined = 19, statements flattened = 5210 [2021-12-21 14:44:11,122 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 14:44:11,123 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 14:44:11,123 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 14:44:11,124 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 14:44:11,131 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:44:10" (1/1) ... [2021-12-21 14:44:11,132 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:44:10" (1/1) ... [2021-12-21 14:44:11,198 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:44:10" (1/1) ... [2021-12-21 14:44:11,199 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:44:10" (1/1) ... [2021-12-21 14:44:11,306 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:44:10" (1/1) ... [2021-12-21 14:44:11,418 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:44:10" (1/1) ... [2021-12-21 14:44:11,471 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:44:10" (1/1) ... [2021-12-21 14:44:11,605 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 14:44:11,607 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 14:44:11,607 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 14:44:11,607 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 14:44:11,610 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:44:10" (1/1) ... [2021-12-21 14:44:11,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 14:44:11,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:44:11,689 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) [2021-12-21 14:44:11,731 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 [2021-12-21 14:44:11,759 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 14:44:11,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 14:44:11,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 14:44:11,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 14:44:11,897 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 14:44:11,909 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 14:44:15,516 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 14:44:15,529 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 14:44:15,529 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-21 14:44:15,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 02:44:15 BoogieIcfgContainer [2021-12-21 14:44:15,532 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 14:44:15,534 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 14:44:15,534 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 14:44:15,537 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 14:44:15,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 02:44:08" (1/3) ... [2021-12-21 14:44:15,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ac590db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 02:44:15, skipping insertion in model container [2021-12-21 14:44:15,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:44:10" (2/3) ... [2021-12-21 14:44:15,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ac590db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 02:44:15, skipping insertion in model container [2021-12-21 14:44:15,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 02:44:15" (3/3) ... [2021-12-21 14:44:15,540 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.ufo.BOUNDED-14.pals+Problem12_label03.c [2021-12-21 14:44:15,545 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 14:44:15,545 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-21 14:44:15,588 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 14:44:15,594 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 [2021-12-21 14:44:15,594 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-21 14:44:15,623 INFO L276 IsEmpty]: Start isEmpty. Operand has 944 states, 941 states have (on average 1.8979808714133901) internal successors, (1786), 943 states have internal predecessors, (1786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:15,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-21 14:44:15,629 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:44:15,630 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] [2021-12-21 14:44:15,630 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:44:15,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:44:15,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1744659899, now seen corresponding path program 1 times [2021-12-21 14:44:15,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:44:15,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982415602] [2021-12-21 14:44:15,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:44:15,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:44:15,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:44:15,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:44:15,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:44:15,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982415602] [2021-12-21 14:44:15,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982415602] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:44:15,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:44:15,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 14:44:15,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59911] [2021-12-21 14:44:15,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:44:15,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:44:15,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:44:15,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:44:15,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:44:15,967 INFO L87 Difference]: Start difference. First operand has 944 states, 941 states have (on average 1.8979808714133901) internal successors, (1786), 943 states have internal predecessors, (1786), 0 states have call successors, (0), 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) [2021-12-21 14:44:19,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:44:19,358 INFO L93 Difference]: Finished difference Result 2587 states and 4966 transitions. [2021-12-21 14:44:19,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:44:19,364 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 [2021-12-21 14:44:19,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:44:19,392 INFO L225 Difference]: With dead ends: 2587 [2021-12-21 14:44:19,393 INFO L226 Difference]: Without dead ends: 1629 [2021-12-21 14:44:19,406 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 [2021-12-21 14:44:19,412 INFO L933 BasicCegarLoop]: 689 mSDtfsCounter, 1032 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 2334 mSolverCounterSat, 651 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1032 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 2985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 651 IncrementalHoareTripleChecker+Valid, 2334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-21 14:44:19,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1032 Valid, 700 Invalid, 2985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [651 Valid, 2334 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-21 14:44:19,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1629 states. [2021-12-21 14:44:19,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1629 to 1629. [2021-12-21 14:44:19,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1629 states, 1627 states have (on average 1.6472034419176398) internal successors, (2680), 1628 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:19,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 2680 transitions. [2021-12-21 14:44:19,527 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 2680 transitions. Word has length 20 [2021-12-21 14:44:19,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:44:19,528 INFO L470 AbstractCegarLoop]: Abstraction has 1629 states and 2680 transitions. [2021-12-21 14:44:19,528 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) [2021-12-21 14:44:19,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 2680 transitions. [2021-12-21 14:44:19,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-21 14:44:19,531 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:44:19,531 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:44:19,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 14:44:19,532 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:44:19,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:44:19,534 INFO L85 PathProgramCache]: Analyzing trace with hash 325703937, now seen corresponding path program 1 times [2021-12-21 14:44:19,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:44:19,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237498118] [2021-12-21 14:44:19,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:44:19,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:44:19,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:44:19,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:44:19,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:44:19,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237498118] [2021-12-21 14:44:19,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237498118] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:44:19,644 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:44:19,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 14:44:19,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940864267] [2021-12-21 14:44:19,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:44:19,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 14:44:19,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:44:19,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 14:44:19,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:44:19,650 INFO L87 Difference]: Start difference. First operand 1629 states and 2680 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:19,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:44:19,732 INFO L93 Difference]: Finished difference Result 1701 states and 2792 transitions. [2021-12-21 14:44:19,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 14:44:19,733 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 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 42 [2021-12-21 14:44:19,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:44:19,739 INFO L225 Difference]: With dead ends: 1701 [2021-12-21 14:44:19,740 INFO L226 Difference]: Without dead ends: 1629 [2021-12-21 14:44:19,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:44:19,745 INFO L933 BasicCegarLoop]: 1651 mSDtfsCounter, 3 mSDsluCounter, 4900 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6551 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:44:19,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6551 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:44:19,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1629 states. [2021-12-21 14:44:19,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1629 to 1629. [2021-12-21 14:44:19,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1629 states, 1627 states have (on average 1.6164720344191763) internal successors, (2630), 1628 states have internal predecessors, (2630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:19,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 2630 transitions. [2021-12-21 14:44:19,782 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 2630 transitions. Word has length 42 [2021-12-21 14:44:19,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:44:19,782 INFO L470 AbstractCegarLoop]: Abstraction has 1629 states and 2630 transitions. [2021-12-21 14:44:19,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:19,783 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 2630 transitions. [2021-12-21 14:44:19,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-21 14:44:19,793 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:44:19,793 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:44:19,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 14:44:19,794 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:44:19,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:44:19,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1207745120, now seen corresponding path program 1 times [2021-12-21 14:44:19,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:44:19,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038076353] [2021-12-21 14:44:19,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:44:19,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:44:19,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:44:19,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:44:19,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:44:19,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038076353] [2021-12-21 14:44:19,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038076353] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:44:19,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:44:19,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 14:44:19,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120664490] [2021-12-21 14:44:19,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:44:19,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:44:19,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:44:19,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:44:19,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:44:19,934 INFO L87 Difference]: Start difference. First operand 1629 states and 2630 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:19,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:44:19,969 INFO L93 Difference]: Finished difference Result 1759 states and 2836 transitions. [2021-12-21 14:44:19,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:44:19,970 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 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 91 [2021-12-21 14:44:19,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:44:19,978 INFO L225 Difference]: With dead ends: 1759 [2021-12-21 14:44:19,978 INFO L226 Difference]: Without dead ends: 1691 [2021-12-21 14:44:19,981 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 [2021-12-21 14:44:19,985 INFO L933 BasicCegarLoop]: 1697 mSDtfsCounter, 1537 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1537 SdHoareTripleChecker+Valid, 1803 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:44:19,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1537 Valid, 1803 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:44:19,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1691 states. [2021-12-21 14:44:20,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1691 to 1689. [2021-12-21 14:44:20,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1689 states, 1687 states have (on average 1.6158861885002964) internal successors, (2726), 1688 states have internal predecessors, (2726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:20,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1689 states to 1689 states and 2726 transitions. [2021-12-21 14:44:20,027 INFO L78 Accepts]: Start accepts. Automaton has 1689 states and 2726 transitions. Word has length 91 [2021-12-21 14:44:20,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:44:20,028 INFO L470 AbstractCegarLoop]: Abstraction has 1689 states and 2726 transitions. [2021-12-21 14:44:20,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:20,028 INFO L276 IsEmpty]: Start isEmpty. Operand 1689 states and 2726 transitions. [2021-12-21 14:44:20,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-21 14:44:20,029 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:44:20,030 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:44:20,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 14:44:20,030 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:44:20,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:44:20,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1564953708, now seen corresponding path program 1 times [2021-12-21 14:44:20,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:44:20,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159025627] [2021-12-21 14:44:20,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:44:20,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:44:20,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:44:20,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:44:20,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:44:20,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159025627] [2021-12-21 14:44:20,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159025627] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:44:20,131 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:44:20,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 14:44:20,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130812872] [2021-12-21 14:44:20,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:44:20,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:44:20,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:44:20,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:44:20,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:44:20,133 INFO L87 Difference]: Start difference. First operand 1689 states and 2726 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:20,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:44:20,169 INFO L93 Difference]: Finished difference Result 1933 states and 3114 transitions. [2021-12-21 14:44:20,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:44:20,170 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 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 91 [2021-12-21 14:44:20,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:44:20,178 INFO L225 Difference]: With dead ends: 1933 [2021-12-21 14:44:20,178 INFO L226 Difference]: Without dead ends: 1805 [2021-12-21 14:44:20,179 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 [2021-12-21 14:44:20,185 INFO L933 BasicCegarLoop]: 1692 mSDtfsCounter, 1533 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1533 SdHoareTripleChecker+Valid, 1802 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:44:20,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1533 Valid, 1802 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:44:20,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1805 states. [2021-12-21 14:44:20,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1805 to 1803. [2021-12-21 14:44:20,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1803 states, 1801 states have (on average 1.6141032759578011) internal successors, (2907), 1802 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:20,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1803 states to 1803 states and 2907 transitions. [2021-12-21 14:44:20,226 INFO L78 Accepts]: Start accepts. Automaton has 1803 states and 2907 transitions. Word has length 91 [2021-12-21 14:44:20,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:44:20,227 INFO L470 AbstractCegarLoop]: Abstraction has 1803 states and 2907 transitions. [2021-12-21 14:44:20,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:20,227 INFO L276 IsEmpty]: Start isEmpty. Operand 1803 states and 2907 transitions. [2021-12-21 14:44:20,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-21 14:44:20,228 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:44:20,229 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:44:20,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 14:44:20,229 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:44:20,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:44:20,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1479108296, now seen corresponding path program 1 times [2021-12-21 14:44:20,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:44:20,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50941757] [2021-12-21 14:44:20,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:44:20,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:44:20,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:44:20,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:44:20,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:44:20,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50941757] [2021-12-21 14:44:20,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50941757] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:44:20,302 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:44:20,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 14:44:20,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171231457] [2021-12-21 14:44:20,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:44:20,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:44:20,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:44:20,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:44:20,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:44:20,304 INFO L87 Difference]: Start difference. First operand 1803 states and 2907 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:20,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:44:20,344 INFO L93 Difference]: Finished difference Result 2263 states and 3637 transitions. [2021-12-21 14:44:20,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:44:20,344 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 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 91 [2021-12-21 14:44:20,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:44:20,352 INFO L225 Difference]: With dead ends: 2263 [2021-12-21 14:44:20,352 INFO L226 Difference]: Without dead ends: 2021 [2021-12-21 14:44:20,353 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 [2021-12-21 14:44:20,354 INFO L933 BasicCegarLoop]: 1687 mSDtfsCounter, 1529 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1529 SdHoareTripleChecker+Valid, 1801 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:44:20,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1529 Valid, 1801 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:44:20,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2021 states. [2021-12-21 14:44:20,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2021 to 2019. [2021-12-21 14:44:20,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2019 states, 2017 states have (on average 1.6098165592464055) internal successors, (3247), 2018 states have internal predecessors, (3247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:20,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2019 states to 2019 states and 3247 transitions. [2021-12-21 14:44:20,401 INFO L78 Accepts]: Start accepts. Automaton has 2019 states and 3247 transitions. Word has length 91 [2021-12-21 14:44:20,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:44:20,405 INFO L470 AbstractCegarLoop]: Abstraction has 2019 states and 3247 transitions. [2021-12-21 14:44:20,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:20,405 INFO L276 IsEmpty]: Start isEmpty. Operand 2019 states and 3247 transitions. [2021-12-21 14:44:20,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-21 14:44:20,410 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:44:20,410 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:44:20,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 14:44:20,411 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:44:20,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:44:20,413 INFO L85 PathProgramCache]: Analyzing trace with hash 733525566, now seen corresponding path program 1 times [2021-12-21 14:44:20,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:44:20,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663902473] [2021-12-21 14:44:20,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:44:20,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:44:20,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:44:20,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:44:20,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:44:20,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663902473] [2021-12-21 14:44:20,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663902473] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:44:20,458 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:44:20,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 14:44:20,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394971942] [2021-12-21 14:44:20,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:44:20,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:44:20,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:44:20,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:44:20,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:44:20,460 INFO L87 Difference]: Start difference. First operand 2019 states and 3247 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:20,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:44:20,507 INFO L93 Difference]: Finished difference Result 2887 states and 4617 transitions. [2021-12-21 14:44:20,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:44:20,507 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 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 91 [2021-12-21 14:44:20,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:44:20,517 INFO L225 Difference]: With dead ends: 2887 [2021-12-21 14:44:20,517 INFO L226 Difference]: Without dead ends: 2429 [2021-12-21 14:44:20,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:44:20,520 INFO L933 BasicCegarLoop]: 1682 mSDtfsCounter, 1525 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1525 SdHoareTripleChecker+Valid, 1800 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:44:20,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1525 Valid, 1800 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:44:20,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2429 states. [2021-12-21 14:44:20,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2429 to 2427. [2021-12-21 14:44:20,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2427 states, 2425 states have (on average 1.6012371134020618) internal successors, (3883), 2426 states have internal predecessors, (3883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:20,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2427 states to 2427 states and 3883 transitions. [2021-12-21 14:44:20,595 INFO L78 Accepts]: Start accepts. Automaton has 2427 states and 3883 transitions. Word has length 91 [2021-12-21 14:44:20,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:44:20,596 INFO L470 AbstractCegarLoop]: Abstraction has 2427 states and 3883 transitions. [2021-12-21 14:44:20,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:20,597 INFO L276 IsEmpty]: Start isEmpty. Operand 2427 states and 3883 transitions. [2021-12-21 14:44:20,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-21 14:44:20,597 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:44:20,598 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:44:20,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 14:44:20,598 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:44:20,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:44:20,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1206505292, now seen corresponding path program 1 times [2021-12-21 14:44:20,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:44:20,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156826092] [2021-12-21 14:44:20,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:44:20,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:44:20,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:44:20,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:44:20,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:44:20,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156826092] [2021-12-21 14:44:20,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156826092] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:44:20,662 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:44:20,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 14:44:20,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729771469] [2021-12-21 14:44:20,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:44:20,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:44:20,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:44:20,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:44:20,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:44:20,664 INFO L87 Difference]: Start difference. First operand 2427 states and 3883 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:20,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:44:20,795 INFO L93 Difference]: Finished difference Result 4063 states and 6445 transitions. [2021-12-21 14:44:20,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:44:20,796 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 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 91 [2021-12-21 14:44:20,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:44:20,808 INFO L225 Difference]: With dead ends: 4063 [2021-12-21 14:44:20,809 INFO L226 Difference]: Without dead ends: 3197 [2021-12-21 14:44:20,811 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 [2021-12-21 14:44:20,811 INFO L933 BasicCegarLoop]: 1677 mSDtfsCounter, 1521 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1521 SdHoareTripleChecker+Valid, 1799 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:44:20,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1521 Valid, 1799 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:44:20,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3197 states. [2021-12-21 14:44:20,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3197 to 3195. [2021-12-21 14:44:20,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3195 states, 3193 states have (on average 1.5869088631381145) internal successors, (5067), 3194 states have internal predecessors, (5067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:20,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3195 states to 3195 states and 5067 transitions. [2021-12-21 14:44:20,908 INFO L78 Accepts]: Start accepts. Automaton has 3195 states and 5067 transitions. Word has length 91 [2021-12-21 14:44:20,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:44:20,909 INFO L470 AbstractCegarLoop]: Abstraction has 3195 states and 5067 transitions. [2021-12-21 14:44:20,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:20,909 INFO L276 IsEmpty]: Start isEmpty. Operand 3195 states and 5067 transitions. [2021-12-21 14:44:20,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-21 14:44:20,910 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:44:20,910 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:44:20,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 14:44:20,911 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:44:20,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:44:20,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1494177322, now seen corresponding path program 1 times [2021-12-21 14:44:20,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:44:20,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908523888] [2021-12-21 14:44:20,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:44:20,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:44:20,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:44:21,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:44:21,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:44:21,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908523888] [2021-12-21 14:44:21,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908523888] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:44:21,019 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:44:21,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 14:44:21,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292006097] [2021-12-21 14:44:21,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:44:21,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 14:44:21,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:44:21,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 14:44:21,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-21 14:44:21,021 INFO L87 Difference]: Start difference. First operand 3195 states and 5067 transitions. Second operand has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:22,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:44:22,414 INFO L93 Difference]: Finished difference Result 26071 states and 40697 transitions. [2021-12-21 14:44:22,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 14:44:22,415 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 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 91 [2021-12-21 14:44:22,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:44:22,517 INFO L225 Difference]: With dead ends: 26071 [2021-12-21 14:44:22,517 INFO L226 Difference]: Without dead ends: 24437 [2021-12-21 14:44:22,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-12-21 14:44:22,533 INFO L933 BasicCegarLoop]: 1597 mSDtfsCounter, 13389 mSDsluCounter, 1514 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13389 SdHoareTripleChecker+Valid, 3111 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:44:22,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13389 Valid, 3111 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 14:44:22,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24437 states. [2021-12-21 14:44:23,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24437 to 4827. [2021-12-21 14:44:23,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4827 states, 4825 states have (on average 1.5641450777202073) internal successors, (7547), 4826 states have internal predecessors, (7547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:23,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4827 states to 4827 states and 7547 transitions. [2021-12-21 14:44:23,086 INFO L78 Accepts]: Start accepts. Automaton has 4827 states and 7547 transitions. Word has length 91 [2021-12-21 14:44:23,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:44:23,087 INFO L470 AbstractCegarLoop]: Abstraction has 4827 states and 7547 transitions. [2021-12-21 14:44:23,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.11111111111111) internal successors, (91), 9 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:23,087 INFO L276 IsEmpty]: Start isEmpty. Operand 4827 states and 7547 transitions. [2021-12-21 14:44:23,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-21 14:44:23,088 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:44:23,088 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 14:44:23,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 14:44:23,089 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:44:23,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:44:23,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1370507274, now seen corresponding path program 1 times [2021-12-21 14:44:23,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:44:23,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224330048] [2021-12-21 14:44:23,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:44:23,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:44:23,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:44:23,162 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-21 14:44:23,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:44:23,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224330048] [2021-12-21 14:44:23,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224330048] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:44:23,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:44:23,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 14:44:23,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927762908] [2021-12-21 14:44:23,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:44:23,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:44:23,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:44:23,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:44:23,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:44:23,166 INFO L87 Difference]: Start difference. First operand 4827 states and 7547 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:26,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:44:26,657 INFO L93 Difference]: Finished difference Result 7833 states and 12474 transitions. [2021-12-21 14:44:26,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:44:26,659 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 0 states have call successors, (0), 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 91 [2021-12-21 14:44:26,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:44:26,675 INFO L225 Difference]: With dead ends: 7833 [2021-12-21 14:44:26,675 INFO L226 Difference]: Without dead ends: 6329 [2021-12-21 14:44:26,681 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 [2021-12-21 14:44:26,682 INFO L933 BasicCegarLoop]: 632 mSDtfsCounter, 889 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2261 mSolverCounterSat, 652 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 889 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 2913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 652 IncrementalHoareTripleChecker+Valid, 2261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:44:26,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [889 Valid, 639 Invalid, 2913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [652 Valid, 2261 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-21 14:44:26,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6329 states. [2021-12-21 14:44:26,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6329 to 6329. [2021-12-21 14:44:27,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6329 states, 6327 states have (on average 1.4804804804804805) internal successors, (9367), 6328 states have internal predecessors, (9367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:27,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6329 states to 6329 states and 9367 transitions. [2021-12-21 14:44:27,037 INFO L78 Accepts]: Start accepts. Automaton has 6329 states and 9367 transitions. Word has length 91 [2021-12-21 14:44:27,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:44:27,037 INFO L470 AbstractCegarLoop]: Abstraction has 6329 states and 9367 transitions. [2021-12-21 14:44:27,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:27,038 INFO L276 IsEmpty]: Start isEmpty. Operand 6329 states and 9367 transitions. [2021-12-21 14:44:27,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-21 14:44:27,039 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:44:27,039 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:44:27,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 14:44:27,040 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:44:27,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:44:27,041 INFO L85 PathProgramCache]: Analyzing trace with hash -30360326, now seen corresponding path program 1 times [2021-12-21 14:44:27,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:44:27,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124068431] [2021-12-21 14:44:27,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:44:27,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:44:27,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:44:27,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:44:27,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:44:27,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124068431] [2021-12-21 14:44:27,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124068431] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:44:27,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:44:27,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 14:44:27,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014807213] [2021-12-21 14:44:27,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:44:27,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:44:27,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:44:27,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:44:27,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:44:27,112 INFO L87 Difference]: Start difference. First operand 6329 states and 9367 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:27,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:44:27,444 INFO L93 Difference]: Finished difference Result 11151 states and 16779 transitions. [2021-12-21 14:44:27,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:44:27,445 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 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 93 [2021-12-21 14:44:27,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:44:27,459 INFO L225 Difference]: With dead ends: 11151 [2021-12-21 14:44:27,460 INFO L226 Difference]: Without dead ends: 7885 [2021-12-21 14:44:27,466 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 [2021-12-21 14:44:27,466 INFO L933 BasicCegarLoop]: 1632 mSDtfsCounter, 1505 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1505 SdHoareTripleChecker+Valid, 1735 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:44:27,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1505 Valid, 1735 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:44:27,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7885 states. [2021-12-21 14:44:27,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7885 to 7883. [2021-12-21 14:44:27,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7883 states, 7881 states have (on average 1.4852176119781753) internal successors, (11705), 7882 states have internal predecessors, (11705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:27,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7883 states to 7883 states and 11705 transitions. [2021-12-21 14:44:27,856 INFO L78 Accepts]: Start accepts. Automaton has 7883 states and 11705 transitions. Word has length 93 [2021-12-21 14:44:27,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:44:27,856 INFO L470 AbstractCegarLoop]: Abstraction has 7883 states and 11705 transitions. [2021-12-21 14:44:27,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:27,857 INFO L276 IsEmpty]: Start isEmpty. Operand 7883 states and 11705 transitions. [2021-12-21 14:44:27,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-21 14:44:27,858 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:44:27,858 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:44:27,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 14:44:27,858 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:44:27,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:44:27,859 INFO L85 PathProgramCache]: Analyzing trace with hash 36133186, now seen corresponding path program 1 times [2021-12-21 14:44:27,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:44:27,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238626151] [2021-12-21 14:44:27,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:44:27,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:44:27,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:44:28,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:44:28,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:44:28,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238626151] [2021-12-21 14:44:28,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238626151] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:44:28,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:44:28,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 14:44:28,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546528742] [2021-12-21 14:44:28,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:44:28,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 14:44:28,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:44:28,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 14:44:28,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-21 14:44:28,147 INFO L87 Difference]: Start difference. First operand 7883 states and 11705 transitions. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:28,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:44:28,801 INFO L93 Difference]: Finished difference Result 12703 states and 19067 transitions. [2021-12-21 14:44:28,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 14:44:28,802 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 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 93 [2021-12-21 14:44:28,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:44:28,820 INFO L225 Difference]: With dead ends: 12703 [2021-12-21 14:44:28,821 INFO L226 Difference]: Without dead ends: 7885 [2021-12-21 14:44:28,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-12-21 14:44:28,830 INFO L933 BasicCegarLoop]: 1643 mSDtfsCounter, 3426 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3426 SdHoareTripleChecker+Valid, 2273 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:44:28,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3426 Valid, 2273 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 14:44:28,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7885 states. [2021-12-21 14:44:29,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7885 to 7883. [2021-12-21 14:44:29,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7883 states, 7881 states have (on average 1.479127014338282) internal successors, (11657), 7882 states have internal predecessors, (11657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:29,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7883 states to 7883 states and 11657 transitions. [2021-12-21 14:44:29,217 INFO L78 Accepts]: Start accepts. Automaton has 7883 states and 11657 transitions. Word has length 93 [2021-12-21 14:44:29,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:44:29,217 INFO L470 AbstractCegarLoop]: Abstraction has 7883 states and 11657 transitions. [2021-12-21 14:44:29,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:29,218 INFO L276 IsEmpty]: Start isEmpty. Operand 7883 states and 11657 transitions. [2021-12-21 14:44:29,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-21 14:44:29,219 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:44:29,219 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:44:29,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 14:44:29,219 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:44:29,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:44:29,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1825047262, now seen corresponding path program 1 times [2021-12-21 14:44:29,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:44:29,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920694331] [2021-12-21 14:44:29,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:44:29,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:44:29,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:44:29,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:44:29,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:44:29,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920694331] [2021-12-21 14:44:29,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920694331] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:44:29,273 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:44:29,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 14:44:29,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74250271] [2021-12-21 14:44:29,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:44:29,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:44:29,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:44:29,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:44:29,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:44:29,275 INFO L87 Difference]: Start difference. First operand 7883 states and 11657 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:29,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:44:29,902 INFO L93 Difference]: Finished difference Result 16943 states and 25323 transitions. [2021-12-21 14:44:29,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:44:29,903 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 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 93 [2021-12-21 14:44:29,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:44:29,926 INFO L225 Difference]: With dead ends: 16943 [2021-12-21 14:44:29,926 INFO L226 Difference]: Without dead ends: 12125 [2021-12-21 14:44:29,936 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 [2021-12-21 14:44:29,937 INFO L933 BasicCegarLoop]: 1659 mSDtfsCounter, 1513 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1513 SdHoareTripleChecker+Valid, 1789 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:44:29,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1513 Valid, 1789 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:44:29,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12125 states. [2021-12-21 14:44:30,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12125 to 12123. [2021-12-21 14:44:30,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12123 states, 12121 states have (on average 1.477848362346341) internal successors, (17913), 12122 states have internal predecessors, (17913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:30,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12123 states to 12123 states and 17913 transitions. [2021-12-21 14:44:30,678 INFO L78 Accepts]: Start accepts. Automaton has 12123 states and 17913 transitions. Word has length 93 [2021-12-21 14:44:30,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:44:30,678 INFO L470 AbstractCegarLoop]: Abstraction has 12123 states and 17913 transitions. [2021-12-21 14:44:30,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:30,679 INFO L276 IsEmpty]: Start isEmpty. Operand 12123 states and 17913 transitions. [2021-12-21 14:44:30,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-21 14:44:30,680 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:44:30,680 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:44:30,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 14:44:30,680 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:44:30,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:44:30,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1222412418, now seen corresponding path program 1 times [2021-12-21 14:44:30,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:44:30,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823349697] [2021-12-21 14:44:30,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:44:30,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:44:30,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:44:30,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:44:30,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:44:30,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823349697] [2021-12-21 14:44:30,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823349697] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:44:30,718 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:44:30,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 14:44:30,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077853988] [2021-12-21 14:44:30,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:44:30,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:44:30,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:44:30,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:44:30,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:44:30,720 INFO L87 Difference]: Start difference. First operand 12123 states and 17913 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:31,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:44:31,791 INFO L93 Difference]: Finished difference Result 29087 states and 43131 transitions. [2021-12-21 14:44:31,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:44:31,791 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 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 93 [2021-12-21 14:44:31,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:44:31,835 INFO L225 Difference]: With dead ends: 29087 [2021-12-21 14:44:31,836 INFO L226 Difference]: Without dead ends: 20029 [2021-12-21 14:44:31,854 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 [2021-12-21 14:44:31,855 INFO L933 BasicCegarLoop]: 1672 mSDtfsCounter, 1517 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1517 SdHoareTripleChecker+Valid, 1798 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:44:31,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1517 Valid, 1798 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:44:31,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20029 states. [2021-12-21 14:44:32,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20029 to 20027. [2021-12-21 14:44:32,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20027 states, 20025 states have (on average 1.4666167290886392) internal successors, (29369), 20026 states have internal predecessors, (29369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:32,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20027 states to 20027 states and 29369 transitions. [2021-12-21 14:44:32,983 INFO L78 Accepts]: Start accepts. Automaton has 20027 states and 29369 transitions. Word has length 93 [2021-12-21 14:44:32,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:44:32,984 INFO L470 AbstractCegarLoop]: Abstraction has 20027 states and 29369 transitions. [2021-12-21 14:44:32,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:32,984 INFO L276 IsEmpty]: Start isEmpty. Operand 20027 states and 29369 transitions. [2021-12-21 14:44:32,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-12-21 14:44:32,985 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:44:32,985 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:44:32,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 14:44:32,985 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:44:32,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:44:32,986 INFO L85 PathProgramCache]: Analyzing trace with hash 705405902, now seen corresponding path program 1 times [2021-12-21 14:44:32,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:44:32,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975362669] [2021-12-21 14:44:32,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:44:32,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:44:33,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:44:33,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:44:33,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:44:33,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975362669] [2021-12-21 14:44:33,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975362669] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:44:33,069 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:44:33,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 14:44:33,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993638285] [2021-12-21 14:44:33,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:44:33,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 14:44:33,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:44:33,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 14:44:33,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 14:44:33,071 INFO L87 Difference]: Start difference. First operand 20027 states and 29369 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:34,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:44:34,500 INFO L93 Difference]: Finished difference Result 36989 states and 54394 transitions. [2021-12-21 14:44:34,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 14:44:34,501 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 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 94 [2021-12-21 14:44:34,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:44:34,540 INFO L225 Difference]: With dead ends: 36989 [2021-12-21 14:44:34,540 INFO L226 Difference]: Without dead ends: 20027 [2021-12-21 14:44:34,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-21 14:44:34,565 INFO L933 BasicCegarLoop]: 1560 mSDtfsCounter, 4985 mSDsluCounter, 1528 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4985 SdHoareTripleChecker+Valid, 3088 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 14:44:34,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4985 Valid, 3088 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 14:44:34,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20027 states. [2021-12-21 14:44:35,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20027 to 20027. [2021-12-21 14:44:35,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20027 states, 20025 states have (on average 1.453832709113608) internal successors, (29113), 20026 states have internal predecessors, (29113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:35,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20027 states to 20027 states and 29113 transitions. [2021-12-21 14:44:35,823 INFO L78 Accepts]: Start accepts. Automaton has 20027 states and 29113 transitions. Word has length 94 [2021-12-21 14:44:35,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:44:35,823 INFO L470 AbstractCegarLoop]: Abstraction has 20027 states and 29113 transitions. [2021-12-21 14:44:35,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:35,824 INFO L276 IsEmpty]: Start isEmpty. Operand 20027 states and 29113 transitions. [2021-12-21 14:44:35,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-12-21 14:44:35,825 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:44:35,825 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:44:35,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 14:44:35,825 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:44:35,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:44:35,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1549411404, now seen corresponding path program 1 times [2021-12-21 14:44:35,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:44:35,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28431911] [2021-12-21 14:44:35,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:44:35,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:44:35,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:44:35,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:44:35,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:44:35,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28431911] [2021-12-21 14:44:35,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28431911] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:44:35,898 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:44:35,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 14:44:35,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125621228] [2021-12-21 14:44:35,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:44:35,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 14:44:35,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:44:35,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 14:44:35,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 14:44:35,899 INFO L87 Difference]: Start difference. First operand 20027 states and 29113 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:37,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:44:37,091 INFO L93 Difference]: Finished difference Result 36989 states and 53882 transitions. [2021-12-21 14:44:37,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 14:44:37,092 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 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 94 [2021-12-21 14:44:37,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:44:37,118 INFO L225 Difference]: With dead ends: 36989 [2021-12-21 14:44:37,118 INFO L226 Difference]: Without dead ends: 20027 [2021-12-21 14:44:37,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-21 14:44:37,143 INFO L933 BasicCegarLoop]: 1558 mSDtfsCounter, 4872 mSDsluCounter, 1532 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4872 SdHoareTripleChecker+Valid, 3090 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:44:37,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4872 Valid, 3090 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 14:44:37,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20027 states. [2021-12-21 14:44:38,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20027 to 20027. [2021-12-21 14:44:38,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20027 states, 20025 states have (on average 1.4442446941323346) internal successors, (28921), 20026 states have internal predecessors, (28921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:38,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20027 states to 20027 states and 28921 transitions. [2021-12-21 14:44:38,588 INFO L78 Accepts]: Start accepts. Automaton has 20027 states and 28921 transitions. Word has length 94 [2021-12-21 14:44:38,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:44:38,589 INFO L470 AbstractCegarLoop]: Abstraction has 20027 states and 28921 transitions. [2021-12-21 14:44:38,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:38,589 INFO L276 IsEmpty]: Start isEmpty. Operand 20027 states and 28921 transitions. [2021-12-21 14:44:38,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-12-21 14:44:38,590 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:44:38,591 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:44:38,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 14:44:38,591 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:44:38,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:44:38,592 INFO L85 PathProgramCache]: Analyzing trace with hash 847811530, now seen corresponding path program 1 times [2021-12-21 14:44:38,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:44:38,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267630922] [2021-12-21 14:44:38,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:44:38,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:44:38,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:44:38,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:44:38,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:44:38,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267630922] [2021-12-21 14:44:38,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267630922] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:44:38,699 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:44:38,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 14:44:38,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845851304] [2021-12-21 14:44:38,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:44:38,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 14:44:38,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:44:38,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 14:44:38,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:44:38,700 INFO L87 Difference]: Start difference. First operand 20027 states and 28921 transitions. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:41,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:44:41,852 INFO L93 Difference]: Finished difference Result 34526 states and 49571 transitions. [2021-12-21 14:44:41,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 14:44:41,853 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 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 94 [2021-12-21 14:44:41,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:44:41,892 INFO L225 Difference]: With dead ends: 34526 [2021-12-21 14:44:41,892 INFO L226 Difference]: Without dead ends: 34524 [2021-12-21 14:44:41,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-21 14:44:41,900 INFO L933 BasicCegarLoop]: 1633 mSDtfsCounter, 820 mSDsluCounter, 9257 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 820 SdHoareTripleChecker+Valid, 10890 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:44:41,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [820 Valid, 10890 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:44:41,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34524 states. [2021-12-21 14:44:43,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34524 to 20795. [2021-12-21 14:44:43,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20795 states, 20793 states have (on average 1.4247583321310056) internal successors, (29625), 20794 states have internal predecessors, (29625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:43,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20795 states to 20795 states and 29625 transitions. [2021-12-21 14:44:43,664 INFO L78 Accepts]: Start accepts. Automaton has 20795 states and 29625 transitions. Word has length 94 [2021-12-21 14:44:43,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:44:43,664 INFO L470 AbstractCegarLoop]: Abstraction has 20795 states and 29625 transitions. [2021-12-21 14:44:43,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:43,664 INFO L276 IsEmpty]: Start isEmpty. Operand 20795 states and 29625 transitions. [2021-12-21 14:44:43,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-21 14:44:43,665 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:44:43,665 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 14:44:43,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 14:44:43,666 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:44:43,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:44:43,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1980431852, now seen corresponding path program 1 times [2021-12-21 14:44:43,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:44:43,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147003699] [2021-12-21 14:44:43,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:44:43,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:44:43,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:44:43,706 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:44:43,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:44:43,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147003699] [2021-12-21 14:44:43,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147003699] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:44:43,707 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:44:43,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 14:44:43,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536962807] [2021-12-21 14:44:43,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:44:43,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:44:43,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:44:43,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:44:43,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:44:43,708 INFO L87 Difference]: Start difference. First operand 20795 states and 29625 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:47,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:44:47,870 INFO L93 Difference]: Finished difference Result 26807 states and 38193 transitions. [2021-12-21 14:44:47,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:44:47,870 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 0 states have call successors, (0), 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 95 [2021-12-21 14:44:47,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:44:47,897 INFO L225 Difference]: With dead ends: 26807 [2021-12-21 14:44:47,897 INFO L226 Difference]: Without dead ends: 23801 [2021-12-21 14:44:47,905 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 [2021-12-21 14:44:47,905 INFO L933 BasicCegarLoop]: 738 mSDtfsCounter, 1077 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2380 mSolverCounterSat, 550 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1077 SdHoareTripleChecker+Valid, 745 SdHoareTripleChecker+Invalid, 2930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 550 IncrementalHoareTripleChecker+Valid, 2380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-21 14:44:47,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1077 Valid, 745 Invalid, 2930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [550 Valid, 2380 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-21 14:44:47,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23801 states. [2021-12-21 14:44:49,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23801 to 23799. [2021-12-21 14:44:49,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23799 states, 23797 states have (on average 1.4004286254569904) internal successors, (33326), 23798 states have internal predecessors, (33326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:49,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23799 states to 23799 states and 33326 transitions. [2021-12-21 14:44:49,779 INFO L78 Accepts]: Start accepts. Automaton has 23799 states and 33326 transitions. Word has length 95 [2021-12-21 14:44:49,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:44:49,780 INFO L470 AbstractCegarLoop]: Abstraction has 23799 states and 33326 transitions. [2021-12-21 14:44:49,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:49,780 INFO L276 IsEmpty]: Start isEmpty. Operand 23799 states and 33326 transitions. [2021-12-21 14:44:49,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-21 14:44:49,790 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:44:49,790 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 14:44:49,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-21 14:44:49,791 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:44:49,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:44:49,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1056306537, now seen corresponding path program 1 times [2021-12-21 14:44:49,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:44:49,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716022640] [2021-12-21 14:44:49,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:44:49,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:44:49,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:44:49,868 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:44:49,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:44:49,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716022640] [2021-12-21 14:44:49,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716022640] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:44:49,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:44:49,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 14:44:49,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966224946] [2021-12-21 14:44:49,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:44:49,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:44:49,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:44:49,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:44:49,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:44:49,871 INFO L87 Difference]: Start difference. First operand 23799 states and 33326 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:53,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:44:53,584 INFO L93 Difference]: Finished difference Result 35817 states and 49295 transitions. [2021-12-21 14:44:53,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:44:53,584 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 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 129 [2021-12-21 14:44:53,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:44:53,625 INFO L225 Difference]: With dead ends: 35817 [2021-12-21 14:44:53,626 INFO L226 Difference]: Without dead ends: 29807 [2021-12-21 14:44:53,637 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 [2021-12-21 14:44:53,638 INFO L933 BasicCegarLoop]: 604 mSDtfsCounter, 900 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1995 mSolverCounterSat, 935 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 900 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 2930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 935 IncrementalHoareTripleChecker+Valid, 1995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-21 14:44:53,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [900 Valid, 610 Invalid, 2930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [935 Valid, 1995 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-21 14:44:53,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29807 states. [2021-12-21 14:44:55,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29807 to 29056. [2021-12-21 14:44:55,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29056 states, 29054 states have (on average 1.3482825084325738) internal successors, (39173), 29055 states have internal predecessors, (39173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:55,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29056 states to 29056 states and 39173 transitions. [2021-12-21 14:44:55,666 INFO L78 Accepts]: Start accepts. Automaton has 29056 states and 39173 transitions. Word has length 129 [2021-12-21 14:44:55,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:44:55,666 INFO L470 AbstractCegarLoop]: Abstraction has 29056 states and 39173 transitions. [2021-12-21 14:44:55,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:44:55,667 INFO L276 IsEmpty]: Start isEmpty. Operand 29056 states and 39173 transitions. [2021-12-21 14:44:55,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-21 14:44:55,677 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:44:55,677 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 14:44:55,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-21 14:44:55,677 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:44:55,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:44:55,678 INFO L85 PathProgramCache]: Analyzing trace with hash 101873069, now seen corresponding path program 1 times [2021-12-21 14:44:55,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:44:55,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148750046] [2021-12-21 14:44:55,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:44:55,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:44:55,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:44:55,768 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-21 14:44:55,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:44:55,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148750046] [2021-12-21 14:44:55,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148750046] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:44:55,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:44:55,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 14:44:55,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171456352] [2021-12-21 14:44:55,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:44:55,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 14:44:55,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:44:55,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 14:44:55,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-21 14:44:55,771 INFO L87 Difference]: Start difference. First operand 29056 states and 39173 transitions. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)