./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.05.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d30512-0125-4b8d-bf22-6626907db95c/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d30512-0125-4b8d-bf22-6626907db95c/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d30512-0125-4b8d-bf22-6626907db95c/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d30512-0125-4b8d-bf22-6626907db95c/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.05.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d30512-0125-4b8d-bf22-6626907db95c/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d30512-0125-4b8d-bf22-6626907db95c/bin/uautomizer-w2VwFs6gM0 --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 16e147b68a860b93a665f8bd36a316225675cf186d50a72fc3242bc6ec552f78 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 14:44:18,578 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 14:44:18,581 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 14:44:18,645 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 14:44:18,646 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 14:44:18,651 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 14:44:18,654 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 14:44:18,658 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 14:44:18,661 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 14:44:18,671 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 14:44:18,672 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 14:44:18,674 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 14:44:18,674 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 14:44:18,678 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 14:44:18,680 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 14:44:18,688 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 14:44:18,692 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 14:44:18,693 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 14:44:18,696 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 14:44:18,701 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 14:44:18,706 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 14:44:18,708 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 14:44:18,712 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 14:44:18,713 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 14:44:18,722 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 14:44:18,723 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 14:44:18,723 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 14:44:18,726 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 14:44:18,727 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 14:44:18,729 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 14:44:18,729 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 14:44:18,730 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 14:44:18,733 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 14:44:18,734 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 14:44:18,736 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 14:44:18,736 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 14:44:18,737 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 14:44:18,737 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 14:44:18,738 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 14:44:18,739 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 14:44:18,740 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 14:44:18,741 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d30512-0125-4b8d-bf22-6626907db95c/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-22 14:44:18,781 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 14:44:18,781 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 14:44:18,782 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 14:44:18,782 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 14:44:18,783 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 14:44:18,784 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 14:44:18,784 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 14:44:18,784 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 14:44:18,784 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 14:44:18,785 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 14:44:18,785 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 14:44:18,785 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 14:44:18,786 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 14:44:18,786 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 14:44:18,786 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 14:44:18,786 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 14:44:18,787 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 14:44:18,787 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 14:44:18,787 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 14:44:18,787 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 14:44:18,788 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 14:44:18,788 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 14:44:18,788 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 14:44:18,789 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 14:44:18,789 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 14:44:18,789 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 14:44:18,789 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 14:44:18,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 14:44:18,790 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 14:44:18,790 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 14:44:18,790 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 14:44:18,791 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 14:44:18,791 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d30512-0125-4b8d-bf22-6626907db95c/bin/uautomizer-w2VwFs6gM0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d30512-0125-4b8d-bf22-6626907db95c/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 16e147b68a860b93a665f8bd36a316225675cf186d50a72fc3242bc6ec552f78 [2021-11-22 14:44:19,080 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 14:44:19,110 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 14:44:19,114 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 14:44:19,115 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 14:44:19,116 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 14:44:19,118 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d30512-0125-4b8d-bf22-6626907db95c/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/systemc/token_ring.05.cil-2.c [2021-11-22 14:44:19,197 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d30512-0125-4b8d-bf22-6626907db95c/bin/uautomizer-w2VwFs6gM0/data/53b164ae8/e9e363d650df4172b1bda7f5843f225a/FLAGf2891d797 [2021-11-22 14:44:19,757 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 14:44:19,758 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d30512-0125-4b8d-bf22-6626907db95c/sv-benchmarks/c/systemc/token_ring.05.cil-2.c [2021-11-22 14:44:19,772 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d30512-0125-4b8d-bf22-6626907db95c/bin/uautomizer-w2VwFs6gM0/data/53b164ae8/e9e363d650df4172b1bda7f5843f225a/FLAGf2891d797 [2021-11-22 14:44:20,038 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d30512-0125-4b8d-bf22-6626907db95c/bin/uautomizer-w2VwFs6gM0/data/53b164ae8/e9e363d650df4172b1bda7f5843f225a [2021-11-22 14:44:20,041 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 14:44:20,043 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 14:44:20,046 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 14:44:20,049 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 14:44:20,067 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 14:44:20,068 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:44:20" (1/1) ... [2021-11-22 14:44:20,069 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12c6c122 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:44:20, skipping insertion in model container [2021-11-22 14:44:20,069 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:44:20" (1/1) ... [2021-11-22 14:44:20,077 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 14:44:20,131 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 14:44:20,330 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d30512-0125-4b8d-bf22-6626907db95c/sv-benchmarks/c/systemc/token_ring.05.cil-2.c[671,684] [2021-11-22 14:44:20,472 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 14:44:20,490 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 14:44:20,501 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d30512-0125-4b8d-bf22-6626907db95c/sv-benchmarks/c/systemc/token_ring.05.cil-2.c[671,684] [2021-11-22 14:44:20,553 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 14:44:20,573 INFO L208 MainTranslator]: Completed translation [2021-11-22 14:44:20,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:44:20 WrapperNode [2021-11-22 14:44:20,574 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 14:44:20,576 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 14:44:20,576 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 14:44:20,576 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 14:44:20,584 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:44:20" (1/1) ... [2021-11-22 14:44:20,596 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:44:20" (1/1) ... [2021-11-22 14:44:20,702 INFO L137 Inliner]: procedures = 38, calls = 47, calls flagged for inlining = 42, calls inlined = 95, statements flattened = 1419 [2021-11-22 14:44:20,703 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 14:44:20,704 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 14:44:20,704 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 14:44:20,704 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 14:44:20,737 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:44:20" (1/1) ... [2021-11-22 14:44:20,738 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:44:20" (1/1) ... [2021-11-22 14:44:20,748 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:44:20" (1/1) ... [2021-11-22 14:44:20,749 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:44:20" (1/1) ... [2021-11-22 14:44:20,786 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:44:20" (1/1) ... [2021-11-22 14:44:20,823 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:44:20" (1/1) ... [2021-11-22 14:44:20,841 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:44:20" (1/1) ... [2021-11-22 14:44:20,853 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 14:44:20,873 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 14:44:20,874 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 14:44:20,874 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 14:44:20,876 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:44:20" (1/1) ... [2021-11-22 14:44:20,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 14:44:20,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d30512-0125-4b8d-bf22-6626907db95c/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:44:20,918 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d30512-0125-4b8d-bf22-6626907db95c/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 14:44:20,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31d30512-0125-4b8d-bf22-6626907db95c/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 14:44:20,985 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 14:44:20,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 14:44:20,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 14:44:20,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 14:44:21,122 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 14:44:21,124 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 14:44:22,560 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 14:44:22,583 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 14:44:22,584 INFO L301 CfgBuilder]: Removed 8 assume(true) statements. [2021-11-22 14:44:22,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:44:22 BoogieIcfgContainer [2021-11-22 14:44:22,588 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 14:44:22,590 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 14:44:22,590 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 14:44:22,594 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 14:44:22,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:44:20" (1/3) ... [2021-11-22 14:44:22,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1396b379 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:44:22, skipping insertion in model container [2021-11-22 14:44:22,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:44:20" (2/3) ... [2021-11-22 14:44:22,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1396b379 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:44:22, skipping insertion in model container [2021-11-22 14:44:22,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:44:22" (3/3) ... [2021-11-22 14:44:22,603 INFO L111 eAbstractionObserver]: Analyzing ICFG token_ring.05.cil-2.c [2021-11-22 14:44:22,609 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 14:44:22,610 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-22 14:44:22,675 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 14:44:22,684 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 [2021-11-22 14:44:22,685 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-22 14:44:22,719 INFO L276 IsEmpty]: Start isEmpty. Operand has 561 states, 558 states have (on average 1.5340501792114696) internal successors, (856), 560 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:44:22,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-22 14:44:22,732 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:44:22,733 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] [2021-11-22 14:44:22,734 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:44:22,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:44:22,741 INFO L85 PathProgramCache]: Analyzing trace with hash 2013666748, now seen corresponding path program 1 times [2021-11-22 14:44:22,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:44:22,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862285749] [2021-11-22 14:44:22,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:44:22,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:44:22,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:44:23,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:44:23,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:44:23,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862285749] [2021-11-22 14:44:23,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862285749] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:44:23,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:44:23,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:44:23,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460259482] [2021-11-22 14:44:23,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:44:23,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:44:23,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:44:23,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:44:23,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:44:23,130 INFO L87 Difference]: Start difference. First operand has 561 states, 558 states have (on average 1.5340501792114696) internal successors, (856), 560 states have internal predecessors, (856), 0 states have call successors, (0), 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 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:44:23,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:44:23,269 INFO L93 Difference]: Finished difference Result 1114 states and 1702 transitions. [2021-11-22 14:44:23,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:44:23,272 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-22 14:44:23,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:44:23,292 INFO L225 Difference]: With dead ends: 1114 [2021-11-22 14:44:23,292 INFO L226 Difference]: Without dead ends: 555 [2021-11-22 14:44:23,299 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 [2021-11-22 14:44:23,303 INFO L933 BasicCegarLoop]: 834 mSDtfsCounter, 830 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 830 SdHoareTripleChecker+Valid, 834 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:44:23,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [830 Valid, 834 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:44:23,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-11-22 14:44:23,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 555. [2021-11-22 14:44:23,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 553 states have (on average 1.5027124773960217) internal successors, (831), 554 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:44:23,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 831 transitions. [2021-11-22 14:44:23,405 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 831 transitions. Word has length 87 [2021-11-22 14:44:23,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:44:23,406 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 831 transitions. [2021-11-22 14:44:23,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:44:23,407 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 831 transitions. [2021-11-22 14:44:23,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-22 14:44:23,411 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:44:23,411 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] [2021-11-22 14:44:23,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 14:44:23,412 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:44:23,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:44:23,424 INFO L85 PathProgramCache]: Analyzing trace with hash 446908798, now seen corresponding path program 1 times [2021-11-22 14:44:23,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:44:23,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864000828] [2021-11-22 14:44:23,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:44:23,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:44:23,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:44:23,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:44:23,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:44:23,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864000828] [2021-11-22 14:44:23,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864000828] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:44:23,556 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:44:23,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:44:23,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415602410] [2021-11-22 14:44:23,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:44:23,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 14:44:23,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:44:23,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 14:44:23,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 14:44:23,560 INFO L87 Difference]: Start difference. First operand 555 states and 831 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:44:23,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:44:23,768 INFO L93 Difference]: Finished difference Result 1530 states and 2286 transitions. [2021-11-22 14:44:23,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 14:44:23,769 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-22 14:44:23,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:44:23,800 INFO L225 Difference]: With dead ends: 1530 [2021-11-22 14:44:23,800 INFO L226 Difference]: Without dead ends: 987 [2021-11-22 14:44:23,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:44:23,813 INFO L933 BasicCegarLoop]: 1449 mSDtfsCounter, 1547 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1547 SdHoareTripleChecker+Valid, 2162 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:44:23,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1547 Valid, 2162 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:44:23,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2021-11-22 14:44:23,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 983. [2021-11-22 14:44:23,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 983 states, 981 states have (on average 1.4943934760448523) internal successors, (1466), 982 states have internal predecessors, (1466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:44:23,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 983 states to 983 states and 1466 transitions. [2021-11-22 14:44:23,916 INFO L78 Accepts]: Start accepts. Automaton has 983 states and 1466 transitions. Word has length 87 [2021-11-22 14:44:23,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:44:23,918 INFO L470 AbstractCegarLoop]: Abstraction has 983 states and 1466 transitions. [2021-11-22 14:44:23,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:44:23,919 INFO L276 IsEmpty]: Start isEmpty. Operand 983 states and 1466 transitions. [2021-11-22 14:44:23,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-22 14:44:23,932 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:44:23,933 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] [2021-11-22 14:44:23,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-22 14:44:23,935 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:44:23,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:44:23,937 INFO L85 PathProgramCache]: Analyzing trace with hash -2113954048, now seen corresponding path program 1 times [2021-11-22 14:44:23,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:44:23,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130236723] [2021-11-22 14:44:23,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:44:23,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:44:23,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:44:24,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:44:24,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:44:24,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130236723] [2021-11-22 14:44:24,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130236723] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:44:24,015 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:44:24,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:44:24,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280505701] [2021-11-22 14:44:24,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:44:24,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 14:44:24,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:44:24,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 14:44:24,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 14:44:24,019 INFO L87 Difference]: Start difference. First operand 983 states and 1466 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:44:24,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:44:24,205 INFO L93 Difference]: Finished difference Result 2809 states and 4185 transitions. [2021-11-22 14:44:24,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 14:44:24,206 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-22 14:44:24,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:44:24,221 INFO L225 Difference]: With dead ends: 2809 [2021-11-22 14:44:24,221 INFO L226 Difference]: Without dead ends: 1840 [2021-11-22 14:44:24,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:44:24,225 INFO L933 BasicCegarLoop]: 1446 mSDtfsCounter, 1542 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1542 SdHoareTripleChecker+Valid, 2158 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:44:24,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1542 Valid, 2158 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:44:24,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1840 states. [2021-11-22 14:44:24,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1840 to 1836. [2021-11-22 14:44:24,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1836 states, 1834 states have (on average 1.4890948745910577) internal successors, (2731), 1835 states have internal predecessors, (2731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:44:24,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1836 states to 1836 states and 2731 transitions. [2021-11-22 14:44:24,396 INFO L78 Accepts]: Start accepts. Automaton has 1836 states and 2731 transitions. Word has length 87 [2021-11-22 14:44:24,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:44:24,399 INFO L470 AbstractCegarLoop]: Abstraction has 1836 states and 2731 transitions. [2021-11-22 14:44:24,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:44:24,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1836 states and 2731 transitions. [2021-11-22 14:44:24,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-22 14:44:24,402 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:44:24,402 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] [2021-11-22 14:44:24,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-22 14:44:24,403 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:44:24,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:44:24,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1226731202, now seen corresponding path program 1 times [2021-11-22 14:44:24,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:44:24,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345412495] [2021-11-22 14:44:24,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:44:24,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:44:24,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:44:24,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:44:24,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:44:24,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345412495] [2021-11-22 14:44:24,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345412495] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:44:24,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:44:24,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:44:24,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080830365] [2021-11-22 14:44:24,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:44:24,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 14:44:24,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:44:24,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 14:44:24,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 14:44:24,515 INFO L87 Difference]: Start difference. First operand 1836 states and 2731 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:44:24,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:44:24,818 INFO L93 Difference]: Finished difference Result 5362 states and 7970 transitions. [2021-11-22 14:44:24,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 14:44:24,819 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-22 14:44:24,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:44:24,845 INFO L225 Difference]: With dead ends: 5362 [2021-11-22 14:44:24,845 INFO L226 Difference]: Without dead ends: 3541 [2021-11-22 14:44:24,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:44:24,860 INFO L933 BasicCegarLoop]: 1443 mSDtfsCounter, 1537 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1537 SdHoareTripleChecker+Valid, 2154 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:44:24,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1537 Valid, 2154 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:44:24,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3541 states. [2021-11-22 14:44:25,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3541 to 3537. [2021-11-22 14:44:25,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3537 states, 3535 states have (on average 1.4845827439886845) internal successors, (5248), 3536 states have internal predecessors, (5248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:44:25,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3537 states to 3537 states and 5248 transitions. [2021-11-22 14:44:25,083 INFO L78 Accepts]: Start accepts. Automaton has 3537 states and 5248 transitions. Word has length 87 [2021-11-22 14:44:25,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:44:25,084 INFO L470 AbstractCegarLoop]: Abstraction has 3537 states and 5248 transitions. [2021-11-22 14:44:25,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:44:25,086 INFO L276 IsEmpty]: Start isEmpty. Operand 3537 states and 5248 transitions. [2021-11-22 14:44:25,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-22 14:44:25,095 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:44:25,095 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] [2021-11-22 14:44:25,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-22 14:44:25,096 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:44:25,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:44:25,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1157193536, now seen corresponding path program 1 times [2021-11-22 14:44:25,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:44:25,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903788934] [2021-11-22 14:44:25,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:44:25,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:44:25,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:44:25,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:44:25,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:44:25,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903788934] [2021-11-22 14:44:25,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903788934] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:44:25,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:44:25,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:44:25,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566585099] [2021-11-22 14:44:25,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:44:25,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 14:44:25,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:44:25,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 14:44:25,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 14:44:25,199 INFO L87 Difference]: Start difference. First operand 3537 states and 5248 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:44:25,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:44:25,677 INFO L93 Difference]: Finished difference Result 10455 states and 15503 transitions. [2021-11-22 14:44:25,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 14:44:25,678 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-22 14:44:25,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:44:25,728 INFO L225 Difference]: With dead ends: 10455 [2021-11-22 14:44:25,728 INFO L226 Difference]: Without dead ends: 6934 [2021-11-22 14:44:25,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:44:25,738 INFO L933 BasicCegarLoop]: 1440 mSDtfsCounter, 1532 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1532 SdHoareTripleChecker+Valid, 2150 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:44:25,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1532 Valid, 2150 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:44:25,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6934 states. [2021-11-22 14:44:26,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6934 to 6930. [2021-11-22 14:44:26,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6930 states, 6928 states have (on average 1.480513856812933) internal successors, (10257), 6929 states have internal predecessors, (10257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:44:26,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6930 states to 6930 states and 10257 transitions. [2021-11-22 14:44:26,261 INFO L78 Accepts]: Start accepts. Automaton has 6930 states and 10257 transitions. Word has length 87 [2021-11-22 14:44:26,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:44:26,262 INFO L470 AbstractCegarLoop]: Abstraction has 6930 states and 10257 transitions. [2021-11-22 14:44:26,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:44:26,264 INFO L276 IsEmpty]: Start isEmpty. Operand 6930 states and 10257 transitions. [2021-11-22 14:44:26,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-22 14:44:26,273 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:44:26,273 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] [2021-11-22 14:44:26,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-22 14:44:26,274 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:44:26,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:44:26,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1234094334, now seen corresponding path program 1 times [2021-11-22 14:44:26,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:44:26,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036745550] [2021-11-22 14:44:26,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:44:26,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:44:26,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:44:26,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:44:26,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:44:26,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036745550] [2021-11-22 14:44:26,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036745550] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:44:26,389 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:44:26,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:44:26,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641225345] [2021-11-22 14:44:26,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:44:26,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 14:44:26,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:44:26,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 14:44:26,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 14:44:26,392 INFO L87 Difference]: Start difference. First operand 6930 states and 10257 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:44:27,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:44:27,139 INFO L93 Difference]: Finished difference Result 20616 states and 30496 transitions. [2021-11-22 14:44:27,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 14:44:27,140 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-22 14:44:27,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:44:27,247 INFO L225 Difference]: With dead ends: 20616 [2021-11-22 14:44:27,248 INFO L226 Difference]: Without dead ends: 13703 [2021-11-22 14:44:27,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:44:27,262 INFO L933 BasicCegarLoop]: 1437 mSDtfsCounter, 1527 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1527 SdHoareTripleChecker+Valid, 2146 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:44:27,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1527 Valid, 2146 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:44:27,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13703 states. [2021-11-22 14:44:28,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13703 to 13699. [2021-11-22 14:44:28,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13699 states, 13697 states have (on average 1.4766737241731767) internal successors, (20226), 13698 states have internal predecessors, (20226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:44:28,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13699 states to 13699 states and 20226 transitions. [2021-11-22 14:44:28,146 INFO L78 Accepts]: Start accepts. Automaton has 13699 states and 20226 transitions. Word has length 87 [2021-11-22 14:44:28,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:44:28,147 INFO L470 AbstractCegarLoop]: Abstraction has 13699 states and 20226 transitions. [2021-11-22 14:44:28,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:44:28,148 INFO L276 IsEmpty]: Start isEmpty. Operand 13699 states and 20226 transitions. [2021-11-22 14:44:28,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-22 14:44:28,155 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:44:28,156 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] [2021-11-22 14:44:28,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-22 14:44:28,156 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:44:28,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:44:28,158 INFO L85 PathProgramCache]: Analyzing trace with hash 266743680, now seen corresponding path program 1 times [2021-11-22 14:44:28,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:44:28,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046938824] [2021-11-22 14:44:28,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:44:28,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:44:28,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:44:28,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:44:28,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:44:28,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046938824] [2021-11-22 14:44:28,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046938824] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:44:28,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:44:28,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:44:28,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91612707] [2021-11-22 14:44:28,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:44:28,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 14:44:28,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:44:28,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 14:44:28,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 14:44:28,246 INFO L87 Difference]: Start difference. First operand 13699 states and 20226 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:44:29,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:44:29,462 INFO L93 Difference]: Finished difference Result 39513 states and 58385 transitions. [2021-11-22 14:44:29,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 14:44:29,463 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-22 14:44:29,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:44:29,533 INFO L225 Difference]: With dead ends: 39513 [2021-11-22 14:44:29,534 INFO L226 Difference]: Without dead ends: 25832 [2021-11-22 14:44:29,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:44:29,558 INFO L933 BasicCegarLoop]: 1343 mSDtfsCounter, 1458 mSDsluCounter, 690 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1458 SdHoareTripleChecker+Valid, 2033 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:44:29,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1458 Valid, 2033 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:44:29,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25832 states. [2021-11-22 14:44:31,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25832 to 25796. [2021-11-22 14:44:31,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25796 states, 25794 states have (on average 1.476428626812437) internal successors, (38083), 25795 states have internal predecessors, (38083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:44:31,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25796 states to 25796 states and 38083 transitions. [2021-11-22 14:44:31,149 INFO L78 Accepts]: Start accepts. Automaton has 25796 states and 38083 transitions. Word has length 87 [2021-11-22 14:44:31,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:44:31,149 INFO L470 AbstractCegarLoop]: Abstraction has 25796 states and 38083 transitions. [2021-11-22 14:44:31,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:44:31,150 INFO L276 IsEmpty]: Start isEmpty. Operand 25796 states and 38083 transitions. [2021-11-22 14:44:31,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-22 14:44:31,160 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:44:31,160 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] [2021-11-22 14:44:31,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-22 14:44:31,161 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:44:31,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:44:31,162 INFO L85 PathProgramCache]: Analyzing trace with hash -2119765826, now seen corresponding path program 1 times [2021-11-22 14:44:31,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:44:31,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539958681] [2021-11-22 14:44:31,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:44:31,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:44:31,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:44:31,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:44:31,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:44:31,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539958681] [2021-11-22 14:44:31,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539958681] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:44:31,228 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:44:31,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:44:31,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281364514] [2021-11-22 14:44:31,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:44:31,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 14:44:31,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:44:31,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 14:44:31,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 14:44:31,230 INFO L87 Difference]: Start difference. First operand 25796 states and 38083 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:44:33,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:44:33,326 INFO L93 Difference]: Finished difference Result 74298 states and 109810 transitions. [2021-11-22 14:44:33,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 14:44:33,327 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-22 14:44:33,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:44:33,473 INFO L225 Difference]: With dead ends: 74298 [2021-11-22 14:44:33,474 INFO L226 Difference]: Without dead ends: 48521 [2021-11-22 14:44:33,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:44:33,534 INFO L933 BasicCegarLoop]: 1339 mSDtfsCounter, 1452 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1452 SdHoareTripleChecker+Valid, 2028 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:44:33,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1452 Valid, 2028 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:44:33,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48521 states. [2021-11-22 14:44:36,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48521 to 47877. [2021-11-22 14:44:36,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47877 states, 47875 states have (on average 1.4719164490861618) internal successors, (70468), 47876 states have internal predecessors, (70468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:44:36,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47877 states to 47877 states and 70468 transitions. [2021-11-22 14:44:36,389 INFO L78 Accepts]: Start accepts. Automaton has 47877 states and 70468 transitions. Word has length 87 [2021-11-22 14:44:36,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:44:36,390 INFO L470 AbstractCegarLoop]: Abstraction has 47877 states and 70468 transitions. [2021-11-22 14:44:36,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:44:36,391 INFO L276 IsEmpty]: Start isEmpty. Operand 47877 states and 70468 transitions. [2021-11-22 14:44:36,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-22 14:44:36,413 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:44:36,414 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] [2021-11-22 14:44:36,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-22 14:44:36,414 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:44:36,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:44:36,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1682575296, now seen corresponding path program 1 times [2021-11-22 14:44:36,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:44:36,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429798576] [2021-11-22 14:44:36,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:44:36,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:44:36,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:44:36,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:44:36,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:44:36,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429798576] [2021-11-22 14:44:36,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429798576] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:44:36,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:44:36,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:44:36,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879542672] [2021-11-22 14:44:36,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:44:36,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 14:44:36,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:44:36,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 14:44:36,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 14:44:36,473 INFO L87 Difference]: Start difference. First operand 47877 states and 70468 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:44:40,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:44:40,268 INFO L93 Difference]: Finished difference Result 137595 states and 202611 transitions. [2021-11-22 14:44:40,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 14:44:40,269 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-22 14:44:40,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:44:40,536 INFO L225 Difference]: With dead ends: 137595 [2021-11-22 14:44:40,536 INFO L226 Difference]: Without dead ends: 89739 [2021-11-22 14:44:40,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:44:40,741 INFO L933 BasicCegarLoop]: 1337 mSDtfsCounter, 1447 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1447 SdHoareTripleChecker+Valid, 2025 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:44:40,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1447 Valid, 2025 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:44:40,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89739 states. [2021-11-22 14:44:44,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89739 to 89607. [2021-11-22 14:44:44,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89607 states, 89605 states have (on average 1.4707103398247865) internal successors, (131783), 89606 states have internal predecessors, (131783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:44:44,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89607 states to 89607 states and 131783 transitions. [2021-11-22 14:44:44,800 INFO L78 Accepts]: Start accepts. Automaton has 89607 states and 131783 transitions. Word has length 87 [2021-11-22 14:44:44,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:44:44,801 INFO L470 AbstractCegarLoop]: Abstraction has 89607 states and 131783 transitions. [2021-11-22 14:44:44,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:44:44,802 INFO L276 IsEmpty]: Start isEmpty. Operand 89607 states and 131783 transitions. [2021-11-22 14:44:45,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-22 14:44:45,134 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:44:45,135 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] [2021-11-22 14:44:45,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-22 14:44:45,135 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:44:45,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:44:45,136 INFO L85 PathProgramCache]: Analyzing trace with hash 466421570, now seen corresponding path program 1 times [2021-11-22 14:44:45,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:44:45,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100694068] [2021-11-22 14:44:45,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:44:45,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:44:45,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:44:45,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:44:45,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:44:45,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100694068] [2021-11-22 14:44:45,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100694068] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:44:45,211 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:44:45,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:44:45,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438441580] [2021-11-22 14:44:45,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:44:45,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 14:44:45,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:44:45,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 14:44:45,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 14:44:45,214 INFO L87 Difference]: Start difference. First operand 89607 states and 131783 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:44:50,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:44:50,875 INFO L93 Difference]: Finished difference Result 257021 states and 378230 transitions. [2021-11-22 14:44:50,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 14:44:50,876 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-22 14:44:50,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:44:51,271 INFO L225 Difference]: With dead ends: 257021 [2021-11-22 14:44:51,271 INFO L226 Difference]: Without dead ends: 167436 [2021-11-22 14:44:51,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:44:51,405 INFO L933 BasicCegarLoop]: 1334 mSDtfsCounter, 1442 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1442 SdHoareTripleChecker+Valid, 2021 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:44:51,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1442 Valid, 2021 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:44:51,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167436 states. [2021-11-22 14:44:57,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167436 to 167176. [2021-11-22 14:44:58,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167176 states, 167174 states have (on average 1.4697500807541843) internal successors, (245704), 167175 states have internal predecessors, (245704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:44:59,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167176 states to 167176 states and 245704 transitions. [2021-11-22 14:44:59,050 INFO L78 Accepts]: Start accepts. Automaton has 167176 states and 245704 transitions. Word has length 87 [2021-11-22 14:44:59,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:44:59,053 INFO L470 AbstractCegarLoop]: Abstraction has 167176 states and 245704 transitions. [2021-11-22 14:44:59,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:44:59,053 INFO L276 IsEmpty]: Start isEmpty. Operand 167176 states and 245704 transitions. [2021-11-22 14:44:59,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-22 14:44:59,209 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:44:59,210 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] [2021-11-22 14:44:59,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-22 14:44:59,210 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:44:59,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:44:59,211 INFO L85 PathProgramCache]: Analyzing trace with hash -265545856, now seen corresponding path program 1 times [2021-11-22 14:44:59,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:44:59,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268430113] [2021-11-22 14:44:59,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:44:59,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:44:59,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:44:59,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:44:59,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:44:59,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268430113] [2021-11-22 14:44:59,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268430113] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:44:59,263 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:44:59,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:44:59,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342981648] [2021-11-22 14:44:59,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:44:59,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 14:44:59,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:44:59,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 14:44:59,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 14:44:59,266 INFO L87 Difference]: Start difference. First operand 167176 states and 245704 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)