./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pals_lcr.5_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c75bd8-e238-4bfd-a248-44c73122fc50/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c75bd8-e238-4bfd-a248-44c73122fc50/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c75bd8-e238-4bfd-a248-44c73122fc50/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c75bd8-e238-4bfd-a248-44c73122fc50/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pals_lcr.5_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c75bd8-e238-4bfd-a248-44c73122fc50/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c75bd8-e238-4bfd-a248-44c73122fc50/bin/uautomizer-tBqnrhUYjU --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 cd59dfc7eeb47efb13ccca054cb95f6a0cd2b5524da1c61aa03d6133f0b2ddeb --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 23:13:19,556 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 23:13:19,559 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 23:13:19,597 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 23:13:19,598 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 23:13:19,600 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 23:13:19,602 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 23:13:19,606 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 23:13:19,608 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 23:13:19,610 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 23:13:19,612 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 23:13:19,614 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 23:13:19,615 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 23:13:19,617 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 23:13:19,619 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 23:13:19,621 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 23:13:19,623 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 23:13:19,624 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 23:13:19,627 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 23:13:19,631 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 23:13:19,633 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 23:13:19,642 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 23:13:19,644 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 23:13:19,645 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 23:13:19,654 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 23:13:19,660 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 23:13:19,661 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 23:13:19,662 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 23:13:19,663 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 23:13:19,665 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 23:13:19,667 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 23:13:19,668 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 23:13:19,670 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 23:13:19,672 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 23:13:19,674 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 23:13:19,675 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 23:13:19,677 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 23:13:19,677 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 23:13:19,678 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 23:13:19,679 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 23:13:19,680 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 23:13:19,681 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c75bd8-e238-4bfd-a248-44c73122fc50/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 23:13:19,740 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 23:13:19,741 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 23:13:19,742 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 23:13:19,742 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 23:13:19,744 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 23:13:19,744 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 23:13:19,745 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 23:13:19,745 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 23:13:19,746 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 23:13:19,746 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 23:13:19,747 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 23:13:19,748 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 23:13:19,748 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 23:13:19,748 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 23:13:19,749 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 23:13:19,749 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 23:13:19,750 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 23:13:19,750 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 23:13:19,750 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 23:13:19,751 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 23:13:19,751 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 23:13:19,751 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 23:13:19,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:13:19,752 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 23:13:19,753 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 23:13:19,753 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 23:13:19,753 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 23:13:19,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 23:13:19,754 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 23:13:19,754 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 23:13:19,755 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 23:13:19,755 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 23:13:19,756 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_a9c75bd8-e238-4bfd-a248-44c73122fc50/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c75bd8-e238-4bfd-a248-44c73122fc50/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cd59dfc7eeb47efb13ccca054cb95f6a0cd2b5524da1c61aa03d6133f0b2ddeb [2021-11-02 23:13:20,129 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 23:13:20,158 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 23:13:20,162 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 23:13:20,163 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 23:13:20,164 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 23:13:20,166 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c75bd8-e238-4bfd-a248-44c73122fc50/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/combinations/pals_lcr.5_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c [2021-11-02 23:13:20,270 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c75bd8-e238-4bfd-a248-44c73122fc50/bin/uautomizer-tBqnrhUYjU/data/de741bb4e/183ab4859e504bfd918d6df61b0a636e/FLAGd1ffec8e2 [2021-11-02 23:13:21,293 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 23:13:21,295 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c75bd8-e238-4bfd-a248-44c73122fc50/sv-benchmarks/c/combinations/pals_lcr.5_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c [2021-11-02 23:13:21,340 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c75bd8-e238-4bfd-a248-44c73122fc50/bin/uautomizer-tBqnrhUYjU/data/de741bb4e/183ab4859e504bfd918d6df61b0a636e/FLAGd1ffec8e2 [2021-11-02 23:13:21,724 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c75bd8-e238-4bfd-a248-44c73122fc50/bin/uautomizer-tBqnrhUYjU/data/de741bb4e/183ab4859e504bfd918d6df61b0a636e [2021-11-02 23:13:21,726 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 23:13:21,728 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 23:13:21,731 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 23:13:21,731 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 23:13:21,735 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 23:13:21,736 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:13:21" (1/1) ... [2021-11-02 23:13:21,738 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1faaafc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:13:21, skipping insertion in model container [2021-11-02 23:13:21,738 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:13:21" (1/1) ... [2021-11-02 23:13:21,746 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 23:13:21,963 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 23:13:22,511 WARN L228 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_a9c75bd8-e238-4bfd-a248-44c73122fc50/sv-benchmarks/c/combinations/pals_lcr.5_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c[11832,11845] [2021-11-02 23:13:22,584 WARN L228 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_a9c75bd8-e238-4bfd-a248-44c73122fc50/sv-benchmarks/c/combinations/pals_lcr.5_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c[18525,18538] [2021-11-02 23:13:23,749 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:13:23,768 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 23:13:23,845 WARN L228 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_a9c75bd8-e238-4bfd-a248-44c73122fc50/sv-benchmarks/c/combinations/pals_lcr.5_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c[11832,11845] [2021-11-02 23:13:23,857 WARN L228 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_a9c75bd8-e238-4bfd-a248-44c73122fc50/sv-benchmarks/c/combinations/pals_lcr.5_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c[18525,18538] [2021-11-02 23:13:24,528 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:13:24,571 INFO L208 MainTranslator]: Completed translation [2021-11-02 23:13:24,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:13:24 WrapperNode [2021-11-02 23:13:24,572 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 23:13:24,573 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 23:13:24,574 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 23:13:24,574 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 23:13:24,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:13:24" (1/1) ... [2021-11-02 23:13:24,665 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:13:24" (1/1) ... [2021-11-02 23:13:25,183 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 23:13:25,184 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 23:13:25,184 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 23:13:25,185 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 23:13:25,196 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:13:24" (1/1) ... [2021-11-02 23:13:25,197 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:13:24" (1/1) ... [2021-11-02 23:13:25,245 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:13:24" (1/1) ... [2021-11-02 23:13:25,246 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:13:24" (1/1) ... [2021-11-02 23:13:25,559 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:13:24" (1/1) ... [2021-11-02 23:13:25,607 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:13:24" (1/1) ... [2021-11-02 23:13:25,626 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:13:24" (1/1) ... [2021-11-02 23:13:25,725 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 23:13:25,732 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 23:13:25,733 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 23:13:25,734 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 23:13:25,735 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:13:24" (1/1) ... [2021-11-02 23:13:25,746 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:13:25,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c75bd8-e238-4bfd-a248-44c73122fc50/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:25,791 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c75bd8-e238-4bfd-a248-44c73122fc50/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 23:13:25,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c75bd8-e238-4bfd-a248-44c73122fc50/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 23:13:25,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 23:13:25,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 23:13:25,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 23:13:25,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 23:13:31,971 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 23:13:31,972 INFO L299 CfgBuilder]: Removed 36 assume(true) statements. [2021-11-02 23:13:31,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:13:31 BoogieIcfgContainer [2021-11-02 23:13:31,977 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 23:13:31,980 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 23:13:31,980 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 23:13:31,985 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 23:13:31,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 11:13:21" (1/3) ... [2021-11-02 23:13:31,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@850621a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:13:31, skipping insertion in model container [2021-11-02 23:13:31,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:13:24" (2/3) ... [2021-11-02 23:13:31,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@850621a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:13:31, skipping insertion in model container [2021-11-02 23:13:31,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:13:31" (3/3) ... [2021-11-02 23:13:31,989 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5_overflow.ufo.UNBOUNDED.pals+Problem12_label05.c [2021-11-02 23:13:31,996 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 23:13:31,997 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-02 23:13:32,066 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 23:13:32,074 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 [2021-11-02 23:13:32,074 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-02 23:13:32,118 INFO L276 IsEmpty]: Start isEmpty. Operand has 908 states, 905 states have (on average 1.901657458563536) internal successors, (1721), 907 states have internal predecessors, (1721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:32,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-02 23:13:32,129 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:32,130 INFO L513 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] [2021-11-02 23:13:32,131 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:32,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:32,138 INFO L85 PathProgramCache]: Analyzing trace with hash -441366565, now seen corresponding path program 1 times [2021-11-02 23:13:32,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:32,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676323599] [2021-11-02 23:13:32,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:32,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:32,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:32,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:32,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:32,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676323599] [2021-11-02 23:13:32,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676323599] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:13:32,526 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:13:32,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 23:13:32,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720662222] [2021-11-02 23:13:32,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-02 23:13:32,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:32,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-02 23:13:32,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 23:13:32,567 INFO L87 Difference]: Start difference. First operand has 908 states, 905 states have (on average 1.901657458563536) internal successors, (1721), 907 states have internal predecessors, (1721), 0 states have call successors, (0), 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 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:32,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:32,681 INFO L93 Difference]: Finished difference Result 1777 states and 3370 transitions. [2021-11-02 23:13:32,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-02 23:13:32,683 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 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 34 [2021-11-02 23:13:32,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:32,719 INFO L225 Difference]: With dead ends: 1777 [2021-11-02 23:13:32,719 INFO L226 Difference]: Without dead ends: 842 [2021-11-02 23:13:32,730 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 23:13:32,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2021-11-02 23:13:32,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 842. [2021-11-02 23:13:32,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 840 states have (on average 1.8904761904761904) internal successors, (1588), 841 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:32,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1588 transitions. [2021-11-02 23:13:32,865 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1588 transitions. Word has length 34 [2021-11-02 23:13:32,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:32,866 INFO L470 AbstractCegarLoop]: Abstraction has 842 states and 1588 transitions. [2021-11-02 23:13:32,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:32,867 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1588 transitions. [2021-11-02 23:13:32,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-02 23:13:32,872 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:32,872 INFO L513 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] [2021-11-02 23:13:32,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 23:13:32,873 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:32,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:32,879 INFO L85 PathProgramCache]: Analyzing trace with hash -950839655, now seen corresponding path program 1 times [2021-11-02 23:13:32,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:32,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449714358] [2021-11-02 23:13:32,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:32,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:32,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:33,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:33,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:33,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449714358] [2021-11-02 23:13:33,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449714358] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:13:33,031 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:13:33,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 23:13:33,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869469635] [2021-11-02 23:13:33,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:13:33,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:33,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:13:33,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:13:33,040 INFO L87 Difference]: Start difference. First operand 842 states and 1588 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:33,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:33,240 INFO L93 Difference]: Finished difference Result 897 states and 1673 transitions. [2021-11-02 23:13:33,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 23:13:33,241 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 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 34 [2021-11-02 23:13:33,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:33,248 INFO L225 Difference]: With dead ends: 897 [2021-11-02 23:13:33,249 INFO L226 Difference]: Without dead ends: 842 [2021-11-02 23:13:33,252 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:13:33,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2021-11-02 23:13:33,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 842. [2021-11-02 23:13:33,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 840 states have (on average 1.8535714285714286) internal successors, (1557), 841 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:33,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1557 transitions. [2021-11-02 23:13:33,290 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1557 transitions. Word has length 34 [2021-11-02 23:13:33,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:33,291 INFO L470 AbstractCegarLoop]: Abstraction has 842 states and 1557 transitions. [2021-11-02 23:13:33,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:33,292 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1557 transitions. [2021-11-02 23:13:33,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-02 23:13:33,303 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:33,304 INFO L513 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] [2021-11-02 23:13:33,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 23:13:33,304 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:33,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:33,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1064123589, now seen corresponding path program 1 times [2021-11-02 23:13:33,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:33,307 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135092912] [2021-11-02 23:13:33,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:33,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:33,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:33,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:33,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:33,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135092912] [2021-11-02 23:13:33,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135092912] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:13:33,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:13:33,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:13:33,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046022073] [2021-11-02 23:13:33,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:13:33,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:33,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:13:33,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:13:33,612 INFO L87 Difference]: Start difference. First operand 842 states and 1557 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:43,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:43,044 INFO L93 Difference]: Finished difference Result 3097 states and 5866 transitions. [2021-11-02 23:13:43,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:13:43,044 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 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 60 [2021-11-02 23:13:43,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:43,062 INFO L225 Difference]: With dead ends: 3097 [2021-11-02 23:13:43,062 INFO L226 Difference]: Without dead ends: 2344 [2021-11-02 23:13:43,064 INFO L786 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 [2021-11-02 23:13:43,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2344 states. [2021-11-02 23:13:43,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2344 to 2344. [2021-11-02 23:13:43,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2344 states, 2342 states have (on average 1.572587532023911) internal successors, (3683), 2343 states have internal predecessors, (3683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:43,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2344 states to 2344 states and 3683 transitions. [2021-11-02 23:13:43,210 INFO L78 Accepts]: Start accepts. Automaton has 2344 states and 3683 transitions. Word has length 60 [2021-11-02 23:13:43,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:43,211 INFO L470 AbstractCegarLoop]: Abstraction has 2344 states and 3683 transitions. [2021-11-02 23:13:43,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:43,212 INFO L276 IsEmpty]: Start isEmpty. Operand 2344 states and 3683 transitions. [2021-11-02 23:13:43,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-02 23:13:43,213 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:43,213 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:43,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 23:13:43,214 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:43,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:43,214 INFO L85 PathProgramCache]: Analyzing trace with hash -695028240, now seen corresponding path program 1 times [2021-11-02 23:13:43,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:43,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626660963] [2021-11-02 23:13:43,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:43,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:43,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:43,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:43,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:43,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626660963] [2021-11-02 23:13:43,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626660963] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:13:43,304 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:13:43,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:13:43,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914769413] [2021-11-02 23:13:43,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:13:43,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:43,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:13:43,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:13:43,307 INFO L87 Difference]: Start difference. First operand 2344 states and 3683 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:43,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:43,362 INFO L93 Difference]: Finished difference Result 2440 states and 3835 transitions. [2021-11-02 23:13:43,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:13:43,363 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-02 23:13:43,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:43,380 INFO L225 Difference]: With dead ends: 2440 [2021-11-02 23:13:43,381 INFO L226 Difference]: Without dead ends: 2389 [2021-11-02 23:13:43,383 INFO L786 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 [2021-11-02 23:13:43,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2389 states. [2021-11-02 23:13:43,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2389 to 2387. [2021-11-02 23:13:43,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2387 states, 2385 states have (on average 1.5731656184486373) internal successors, (3752), 2386 states have internal predecessors, (3752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:43,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2387 states to 2387 states and 3752 transitions. [2021-11-02 23:13:43,478 INFO L78 Accepts]: Start accepts. Automaton has 2387 states and 3752 transitions. Word has length 64 [2021-11-02 23:13:43,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:43,481 INFO L470 AbstractCegarLoop]: Abstraction has 2387 states and 3752 transitions. [2021-11-02 23:13:43,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:43,482 INFO L276 IsEmpty]: Start isEmpty. Operand 2387 states and 3752 transitions. [2021-11-02 23:13:43,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-02 23:13:43,484 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:43,485 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:43,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 23:13:43,486 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:43,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:43,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1440610970, now seen corresponding path program 1 times [2021-11-02 23:13:43,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:43,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685069046] [2021-11-02 23:13:43,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:43,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:43,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:43,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:43,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:43,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685069046] [2021-11-02 23:13:43,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685069046] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:13:43,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:13:43,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:13:43,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624659448] [2021-11-02 23:13:43,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:13:43,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:43,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:13:43,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:13:43,600 INFO L87 Difference]: Start difference. First operand 2387 states and 3752 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:43,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:43,665 INFO L93 Difference]: Finished difference Result 2563 states and 4032 transitions. [2021-11-02 23:13:43,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:13:43,666 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-02 23:13:43,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:43,685 INFO L225 Difference]: With dead ends: 2563 [2021-11-02 23:13:43,686 INFO L226 Difference]: Without dead ends: 2469 [2021-11-02 23:13:43,687 INFO L786 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 [2021-11-02 23:13:43,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2469 states. [2021-11-02 23:13:43,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2469 to 2467. [2021-11-02 23:13:43,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2467 states, 2465 states have (on average 1.573630831643002) internal successors, (3879), 2466 states have internal predecessors, (3879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:43,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2467 states to 2467 states and 3879 transitions. [2021-11-02 23:13:43,782 INFO L78 Accepts]: Start accepts. Automaton has 2467 states and 3879 transitions. Word has length 64 [2021-11-02 23:13:43,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:43,783 INFO L470 AbstractCegarLoop]: Abstraction has 2467 states and 3879 transitions. [2021-11-02 23:13:43,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:43,783 INFO L276 IsEmpty]: Start isEmpty. Operand 2467 states and 3879 transitions. [2021-11-02 23:13:43,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-02 23:13:43,784 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:43,785 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:43,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 23:13:43,785 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:43,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:43,786 INFO L85 PathProgramCache]: Analyzing trace with hash 914325468, now seen corresponding path program 1 times [2021-11-02 23:13:43,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:43,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018994090] [2021-11-02 23:13:43,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:43,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:43,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:43,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:43,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:43,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018994090] [2021-11-02 23:13:43,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018994090] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:13:43,875 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:13:43,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:13:43,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914733860] [2021-11-02 23:13:43,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:13:43,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:43,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:13:43,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:13:43,884 INFO L87 Difference]: Start difference. First operand 2467 states and 3879 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:43,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:43,978 INFO L93 Difference]: Finished difference Result 2791 states and 4393 transitions. [2021-11-02 23:13:43,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:13:43,983 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-02 23:13:43,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:44,007 INFO L225 Difference]: With dead ends: 2791 [2021-11-02 23:13:44,007 INFO L226 Difference]: Without dead ends: 2617 [2021-11-02 23:13:44,009 INFO L786 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 [2021-11-02 23:13:44,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2617 states. [2021-11-02 23:13:44,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2617 to 2615. [2021-11-02 23:13:44,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2615 states, 2613 states have (on average 1.5732874091083047) internal successors, (4111), 2614 states have internal predecessors, (4111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:44,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2615 states to 2615 states and 4111 transitions. [2021-11-02 23:13:44,117 INFO L78 Accepts]: Start accepts. Automaton has 2615 states and 4111 transitions. Word has length 64 [2021-11-02 23:13:44,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:44,119 INFO L470 AbstractCegarLoop]: Abstraction has 2615 states and 4111 transitions. [2021-11-02 23:13:44,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:44,119 INFO L276 IsEmpty]: Start isEmpty. Operand 2615 states and 4111 transitions. [2021-11-02 23:13:44,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-02 23:13:44,120 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:44,121 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:44,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 23:13:44,121 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:44,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:44,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1701027568, now seen corresponding path program 1 times [2021-11-02 23:13:44,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:44,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257503810] [2021-11-02 23:13:44,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:44,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:44,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:44,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:44,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:44,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257503810] [2021-11-02 23:13:44,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257503810] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:13:44,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:13:44,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:13:44,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659496035] [2021-11-02 23:13:44,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:13:44,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:44,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:13:44,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:13:44,232 INFO L87 Difference]: Start difference. First operand 2615 states and 4111 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:44,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:44,317 INFO L93 Difference]: Finished difference Result 3211 states and 5049 transitions. [2021-11-02 23:13:44,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:13:44,318 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-02 23:13:44,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:44,341 INFO L225 Difference]: With dead ends: 3211 [2021-11-02 23:13:44,342 INFO L226 Difference]: Without dead ends: 2889 [2021-11-02 23:13:44,347 INFO L786 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 [2021-11-02 23:13:44,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2889 states. [2021-11-02 23:13:44,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2889 to 2887. [2021-11-02 23:13:44,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2887 states, 2885 states have (on average 1.57053726169844) internal successors, (4531), 2886 states have internal predecessors, (4531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:44,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2887 states to 2887 states and 4531 transitions. [2021-11-02 23:13:44,469 INFO L78 Accepts]: Start accepts. Automaton has 2887 states and 4531 transitions. Word has length 64 [2021-11-02 23:13:44,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:44,470 INFO L470 AbstractCegarLoop]: Abstraction has 2887 states and 4531 transitions. [2021-11-02 23:13:44,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:44,470 INFO L276 IsEmpty]: Start isEmpty. Operand 2887 states and 4531 transitions. [2021-11-02 23:13:44,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-02 23:13:44,471 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:44,471 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:44,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-02 23:13:44,472 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:44,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:44,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1105068988, now seen corresponding path program 1 times [2021-11-02 23:13:44,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:44,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878170112] [2021-11-02 23:13:44,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:44,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:44,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:44,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:44,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:44,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878170112] [2021-11-02 23:13:44,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878170112] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:13:44,572 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:13:44,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:13:44,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947103588] [2021-11-02 23:13:44,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:13:44,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:44,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:13:44,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:13:44,575 INFO L87 Difference]: Start difference. First operand 2887 states and 4531 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:44,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:44,683 INFO L93 Difference]: Finished difference Result 3979 states and 6229 transitions. [2021-11-02 23:13:44,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:13:44,684 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-02 23:13:44,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:44,709 INFO L225 Difference]: With dead ends: 3979 [2021-11-02 23:13:44,710 INFO L226 Difference]: Without dead ends: 3385 [2021-11-02 23:13:44,712 INFO L786 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 [2021-11-02 23:13:44,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3385 states. [2021-11-02 23:13:44,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3385 to 3383. [2021-11-02 23:13:44,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3383 states, 3381 states have (on average 1.5625554569653948) internal successors, (5283), 3382 states have internal predecessors, (5283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:44,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3383 states to 3383 states and 5283 transitions. [2021-11-02 23:13:44,878 INFO L78 Accepts]: Start accepts. Automaton has 3383 states and 5283 transitions. Word has length 64 [2021-11-02 23:13:44,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:44,880 INFO L470 AbstractCegarLoop]: Abstraction has 3383 states and 5283 transitions. [2021-11-02 23:13:44,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:44,881 INFO L276 IsEmpty]: Start isEmpty. Operand 3383 states and 5283 transitions. [2021-11-02 23:13:44,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-02 23:13:44,882 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:44,882 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:44,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-02 23:13:44,883 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:44,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:44,883 INFO L85 PathProgramCache]: Analyzing trace with hash 112916410, now seen corresponding path program 1 times [2021-11-02 23:13:44,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:44,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270837696] [2021-11-02 23:13:44,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:44,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:44,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:45,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:45,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:45,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270837696] [2021-11-02 23:13:45,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270837696] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:13:45,003 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:13:45,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 23:13:45,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879313953] [2021-11-02 23:13:45,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 23:13:45,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:45,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 23:13:45,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:13:45,012 INFO L87 Difference]: Start difference. First operand 3383 states and 5283 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:45,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:45,946 INFO L93 Difference]: Finished difference Result 14283 states and 22093 transitions. [2021-11-02 23:13:45,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 23:13:45,946 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-02 23:13:45,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:46,041 INFO L225 Difference]: With dead ends: 14283 [2021-11-02 23:13:46,042 INFO L226 Difference]: Without dead ends: 13193 [2021-11-02 23:13:46,051 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-11-02 23:13:46,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13193 states. [2021-11-02 23:13:46,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13193 to 4471. [2021-11-02 23:13:46,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4471 states, 4469 states have (on average 1.5437458044305215) internal successors, (6899), 4470 states have internal predecessors, (6899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:46,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4471 states to 4471 states and 6899 transitions. [2021-11-02 23:13:46,477 INFO L78 Accepts]: Start accepts. Automaton has 4471 states and 6899 transitions. Word has length 64 [2021-11-02 23:13:46,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:46,478 INFO L470 AbstractCegarLoop]: Abstraction has 4471 states and 6899 transitions. [2021-11-02 23:13:46,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:46,478 INFO L276 IsEmpty]: Start isEmpty. Operand 4471 states and 6899 transitions. [2021-11-02 23:13:46,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-02 23:13:46,486 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:46,486 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:46,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-02 23:13:46,488 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:46,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:46,489 INFO L85 PathProgramCache]: Analyzing trace with hash -277208054, now seen corresponding path program 1 times [2021-11-02 23:13:46,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:46,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181955239] [2021-11-02 23:13:46,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:46,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:46,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:46,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:46,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:46,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181955239] [2021-11-02 23:13:46,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181955239] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:13:46,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:13:46,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:13:46,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715573683] [2021-11-02 23:13:46,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:13:46,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:46,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:13:46,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:13:46,562 INFO L87 Difference]: Start difference. First operand 4471 states and 6899 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:47,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:47,008 INFO L93 Difference]: Finished difference Result 7661 states and 11719 transitions. [2021-11-02 23:13:47,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:13:47,009 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-02 23:13:47,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:47,026 INFO L225 Difference]: With dead ends: 7661 [2021-11-02 23:13:47,027 INFO L226 Difference]: Without dead ends: 5483 [2021-11-02 23:13:47,132 INFO L786 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 [2021-11-02 23:13:47,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5483 states. [2021-11-02 23:13:47,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5483 to 5481. [2021-11-02 23:13:47,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5481 states, 5479 states have (on average 1.5281985763825516) internal successors, (8373), 5480 states have internal predecessors, (8373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:47,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5481 states to 5481 states and 8373 transitions. [2021-11-02 23:13:47,600 INFO L78 Accepts]: Start accepts. Automaton has 5481 states and 8373 transitions. Word has length 66 [2021-11-02 23:13:47,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:47,601 INFO L470 AbstractCegarLoop]: Abstraction has 5481 states and 8373 transitions. [2021-11-02 23:13:47,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:47,602 INFO L276 IsEmpty]: Start isEmpty. Operand 5481 states and 8373 transitions. [2021-11-02 23:13:47,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-02 23:13:47,603 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:47,604 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:47,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-02 23:13:47,605 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:47,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:47,605 INFO L85 PathProgramCache]: Analyzing trace with hash -210714542, now seen corresponding path program 1 times [2021-11-02 23:13:47,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:47,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283521351] [2021-11-02 23:13:47,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:47,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:47,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:47,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:47,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:47,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283521351] [2021-11-02 23:13:47,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283521351] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:13:47,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:13:47,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 23:13:47,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042292908] [2021-11-02 23:13:47,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 23:13:47,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:47,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 23:13:47,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:13:47,920 INFO L87 Difference]: Start difference. First operand 5481 states and 8373 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:48,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:48,482 INFO L93 Difference]: Finished difference Result 8669 states and 13143 transitions. [2021-11-02 23:13:48,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 23:13:48,483 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-02 23:13:48,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:48,498 INFO L225 Difference]: With dead ends: 8669 [2021-11-02 23:13:48,498 INFO L226 Difference]: Without dead ends: 5483 [2021-11-02 23:13:48,505 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-02 23:13:48,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5483 states. [2021-11-02 23:13:48,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5483 to 5481. [2021-11-02 23:13:48,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5481 states, 5479 states have (on average 1.5194378536229238) internal successors, (8325), 5480 states have internal predecessors, (8325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:48,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5481 states to 5481 states and 8325 transitions. [2021-11-02 23:13:48,893 INFO L78 Accepts]: Start accepts. Automaton has 5481 states and 8325 transitions. Word has length 66 [2021-11-02 23:13:48,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:48,894 INFO L470 AbstractCegarLoop]: Abstraction has 5481 states and 8325 transitions. [2021-11-02 23:13:48,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:48,894 INFO L276 IsEmpty]: Start isEmpty. Operand 5481 states and 8325 transitions. [2021-11-02 23:13:48,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-02 23:13:48,895 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:48,896 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:48,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-02 23:13:48,896 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:48,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:48,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1643060746, now seen corresponding path program 1 times [2021-11-02 23:13:48,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:48,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278610129] [2021-11-02 23:13:48,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:48,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:48,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:49,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:49,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:49,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278610129] [2021-11-02 23:13:49,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278610129] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:13:49,015 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:13:49,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 23:13:49,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029442486] [2021-11-02 23:13:49,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 23:13:49,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:49,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 23:13:49,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:13:49,017 INFO L87 Difference]: Start difference. First operand 5481 states and 8325 transitions. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:49,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:49,597 INFO L93 Difference]: Finished difference Result 8667 states and 13046 transitions. [2021-11-02 23:13:49,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 23:13:49,597 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-02 23:13:49,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:49,613 INFO L225 Difference]: With dead ends: 8667 [2021-11-02 23:13:49,613 INFO L226 Difference]: Without dead ends: 5481 [2021-11-02 23:13:49,619 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:13:49,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5481 states. [2021-11-02 23:13:50,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5481 to 5481. [2021-11-02 23:13:50,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5481 states, 5479 states have (on average 1.5106771308632962) internal successors, (8277), 5480 states have internal predecessors, (8277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:50,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5481 states to 5481 states and 8277 transitions. [2021-11-02 23:13:50,074 INFO L78 Accepts]: Start accepts. Automaton has 5481 states and 8277 transitions. Word has length 67 [2021-11-02 23:13:50,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:50,075 INFO L470 AbstractCegarLoop]: Abstraction has 5481 states and 8277 transitions. [2021-11-02 23:13:50,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:50,075 INFO L276 IsEmpty]: Start isEmpty. Operand 5481 states and 8277 transitions. [2021-11-02 23:13:50,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-02 23:13:50,076 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:50,077 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:50,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-02 23:13:50,077 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:50,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:50,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1372042872, now seen corresponding path program 1 times [2021-11-02 23:13:50,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:50,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447938575] [2021-11-02 23:13:50,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:50,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:50,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:50,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:50,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:50,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447938575] [2021-11-02 23:13:50,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447938575] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:13:50,185 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:13:50,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 23:13:50,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474853552] [2021-11-02 23:13:50,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 23:13:50,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:50,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 23:13:50,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:13:50,188 INFO L87 Difference]: Start difference. First operand 5481 states and 8277 transitions. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:50,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:50,736 INFO L93 Difference]: Finished difference Result 8667 states and 12950 transitions. [2021-11-02 23:13:50,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 23:13:50,737 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-02 23:13:50,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:50,753 INFO L225 Difference]: With dead ends: 8667 [2021-11-02 23:13:50,753 INFO L226 Difference]: Without dead ends: 5481 [2021-11-02 23:13:50,760 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:13:50,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5481 states. [2021-11-02 23:13:51,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5481 to 5481. [2021-11-02 23:13:51,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5481 states, 5479 states have (on average 1.5019164081036684) internal successors, (8229), 5480 states have internal predecessors, (8229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:51,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5481 states to 5481 states and 8229 transitions. [2021-11-02 23:13:51,177 INFO L78 Accepts]: Start accepts. Automaton has 5481 states and 8229 transitions. Word has length 67 [2021-11-02 23:13:51,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:51,178 INFO L470 AbstractCegarLoop]: Abstraction has 5481 states and 8229 transitions. [2021-11-02 23:13:51,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:51,179 INFO L276 IsEmpty]: Start isEmpty. Operand 5481 states and 8229 transitions. [2021-11-02 23:13:51,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-02 23:13:51,180 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:51,180 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:51,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-02 23:13:51,181 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:51,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:51,182 INFO L85 PathProgramCache]: Analyzing trace with hash 316900870, now seen corresponding path program 1 times [2021-11-02 23:13:51,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:51,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929605725] [2021-11-02 23:13:51,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:51,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:51,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:51,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:51,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:51,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929605725] [2021-11-02 23:13:51,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929605725] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:13:51,331 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:13:51,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-02 23:13:51,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972502017] [2021-11-02 23:13:51,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 23:13:51,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:51,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 23:13:51,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:13:51,333 INFO L87 Difference]: Start difference. First operand 5481 states and 8229 transitions. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:52,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:52,225 INFO L93 Difference]: Finished difference Result 8260 states and 12139 transitions. [2021-11-02 23:13:52,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 23:13:52,226 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-02 23:13:52,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:52,249 INFO L225 Difference]: With dead ends: 8260 [2021-11-02 23:13:52,249 INFO L226 Difference]: Without dead ends: 8258 [2021-11-02 23:13:52,254 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-11-02 23:13:52,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8258 states. [2021-11-02 23:13:52,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8258 to 5673. [2021-11-02 23:13:52,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5673 states, 5671 states have (on average 1.4821019220596015) internal successors, (8405), 5672 states have internal predecessors, (8405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:52,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5673 states to 5673 states and 8405 transitions. [2021-11-02 23:13:52,754 INFO L78 Accepts]: Start accepts. Automaton has 5673 states and 8405 transitions. Word has length 67 [2021-11-02 23:13:52,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:52,754 INFO L470 AbstractCegarLoop]: Abstraction has 5673 states and 8405 transitions. [2021-11-02 23:13:52,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:52,755 INFO L276 IsEmpty]: Start isEmpty. Operand 5673 states and 8405 transitions. [2021-11-02 23:13:52,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-02 23:13:52,759 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:52,760 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:52,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-02 23:13:52,760 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:52,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:52,761 INFO L85 PathProgramCache]: Analyzing trace with hash -119875554, now seen corresponding path program 1 times [2021-11-02 23:13:52,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:52,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599784294] [2021-11-02 23:13:52,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:52,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:52,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:52,885 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-02 23:13:52,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:52,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599784294] [2021-11-02 23:13:52,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599784294] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:13:52,886 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:13:52,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 23:13:52,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346897278] [2021-11-02 23:13:52,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 23:13:52,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:52,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 23:13:52,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:13:52,888 INFO L87 Difference]: Start difference. First operand 5673 states and 8405 transitions. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:55,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:55,101 INFO L93 Difference]: Finished difference Result 23253 states and 33339 transitions. [2021-11-02 23:13:55,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 23:13:55,102 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-02 23:13:55,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:55,159 INFO L225 Difference]: With dead ends: 23253 [2021-11-02 23:13:55,159 INFO L226 Difference]: Without dead ends: 19875 [2021-11-02 23:13:55,173 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-02 23:13:55,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19875 states. [2021-11-02 23:13:56,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19875 to 9049. [2021-11-02 23:13:56,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9049 states, 9047 states have (on average 1.4542942411849231) internal successors, (13157), 9048 states have internal predecessors, (13157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:56,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9049 states to 9049 states and 13157 transitions. [2021-11-02 23:13:56,253 INFO L78 Accepts]: Start accepts. Automaton has 9049 states and 13157 transitions. Word has length 94 [2021-11-02 23:13:56,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:56,254 INFO L470 AbstractCegarLoop]: Abstraction has 9049 states and 13157 transitions. [2021-11-02 23:13:56,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:56,255 INFO L276 IsEmpty]: Start isEmpty. Operand 9049 states and 13157 transitions. [2021-11-02 23:13:56,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-02 23:13:56,259 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:56,260 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:56,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-02 23:13:56,260 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:56,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:56,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1888658370, now seen corresponding path program 1 times [2021-11-02 23:13:56,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:56,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79705239] [2021-11-02 23:13:56,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:56,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:56,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:56,383 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-02 23:13:56,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:56,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79705239] [2021-11-02 23:13:56,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79705239] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:13:56,387 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:13:56,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 23:13:56,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148170197] [2021-11-02 23:13:56,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 23:13:56,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:56,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 23:13:56,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:13:56,390 INFO L87 Difference]: Start difference. First operand 9049 states and 13157 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:58,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:58,726 INFO L93 Difference]: Finished difference Result 26629 states and 38091 transitions. [2021-11-02 23:13:58,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 23:13:58,727 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-02 23:13:58,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:58,786 INFO L225 Difference]: With dead ends: 26629 [2021-11-02 23:13:58,786 INFO L226 Difference]: Without dead ends: 23251 [2021-11-02 23:13:58,798 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-02 23:13:58,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23251 states. [2021-11-02 23:14:00,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23251 to 14121. [2021-11-02 23:14:00,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14121 states, 14119 states have (on average 1.4338834195056307) internal successors, (20245), 14120 states have internal predecessors, (20245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:14:00,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14121 states to 14121 states and 20245 transitions. [2021-11-02 23:14:00,054 INFO L78 Accepts]: Start accepts. Automaton has 14121 states and 20245 transitions. Word has length 94 [2021-11-02 23:14:00,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:14:00,054 INFO L470 AbstractCegarLoop]: Abstraction has 14121 states and 20245 transitions. [2021-11-02 23:14:00,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:14:00,055 INFO L276 IsEmpty]: Start isEmpty. Operand 14121 states and 20245 transitions. [2021-11-02 23:14:00,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-02 23:14:00,060 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:14:00,061 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:14:00,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-02 23:14:00,061 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:14:00,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:14:00,062 INFO L85 PathProgramCache]: Analyzing trace with hash -757018530, now seen corresponding path program 1 times [2021-11-02 23:14:00,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:14:00,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143153148] [2021-11-02 23:14:00,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:14:00,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:14:00,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:00,176 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-02 23:14:00,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:14:00,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143153148] [2021-11-02 23:14:00,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143153148] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:14:00,177 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:14:00,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 23:14:00,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264907925] [2021-11-02 23:14:00,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 23:14:00,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:14:00,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 23:14:00,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:14:00,180 INFO L87 Difference]: Start difference. First operand 14121 states and 20245 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:14:02,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:14:02,524 INFO L93 Difference]: Finished difference Result 30005 states and 42843 transitions. [2021-11-02 23:14:02,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 23:14:02,525 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-02 23:14:02,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:14:02,593 INFO L225 Difference]: With dead ends: 30005 [2021-11-02 23:14:02,594 INFO L226 Difference]: Without dead ends: 26627 [2021-11-02 23:14:02,606 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-02 23:14:02,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26627 states. [2021-11-02 23:14:04,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26627 to 17497. [2021-11-02 23:14:04,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17497 states, 17495 states have (on average 1.428808230923121) internal successors, (24997), 17496 states have internal predecessors, (24997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:14:04,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17497 states to 17497 states and 24997 transitions. [2021-11-02 23:14:04,154 INFO L78 Accepts]: Start accepts. Automaton has 17497 states and 24997 transitions. Word has length 94 [2021-11-02 23:14:04,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:14:04,155 INFO L470 AbstractCegarLoop]: Abstraction has 17497 states and 24997 transitions. [2021-11-02 23:14:04,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:14:04,155 INFO L276 IsEmpty]: Start isEmpty. Operand 17497 states and 24997 transitions. [2021-11-02 23:14:04,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-02 23:14:04,162 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:14:04,162 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:14:04,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-02 23:14:04,163 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:14:04,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:14:04,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1992477570, now seen corresponding path program 1 times [2021-11-02 23:14:04,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:14:04,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51776316] [2021-11-02 23:14:04,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:14:04,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:14:04,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:04,263 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 23:14:04,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:14:04,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51776316] [2021-11-02 23:14:04,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51776316] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:14:04,264 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:14:04,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 23:14:04,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563170853] [2021-11-02 23:14:04,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 23:14:04,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:14:04,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 23:14:04,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:14:04,267 INFO L87 Difference]: Start difference. First operand 17497 states and 24997 transitions. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:14:06,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:14:06,592 INFO L93 Difference]: Finished difference Result 33381 states and 47595 transitions. [2021-11-02 23:14:06,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 23:14:06,593 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-02 23:14:06,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:14:06,659 INFO L225 Difference]: With dead ends: 33381 [2021-11-02 23:14:06,659 INFO L226 Difference]: Without dead ends: 30003 [2021-11-02 23:14:06,670 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-02 23:14:06,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30003 states. [2021-11-02 23:14:08,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30003 to 20873. [2021-11-02 23:14:08,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20873 states, 20871 states have (on average 1.4253749221407694) internal successors, (29749), 20872 states have internal predecessors, (29749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:14:08,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20873 states to 20873 states and 29749 transitions. [2021-11-02 23:14:08,794 INFO L78 Accepts]: Start accepts. Automaton has 20873 states and 29749 transitions. Word has length 94 [2021-11-02 23:14:08,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:14:08,794 INFO L470 AbstractCegarLoop]: Abstraction has 20873 states and 29749 transitions. [2021-11-02 23:14:08,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:14:08,795 INFO L276 IsEmpty]: Start isEmpty. Operand 20873 states and 29749 transitions. [2021-11-02 23:14:08,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-02 23:14:08,804 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:14:08,804 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:14:08,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-02 23:14:08,805 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:14:08,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:14:08,805 INFO L85 PathProgramCache]: Analyzing trace with hash 881494174, now seen corresponding path program 1 times [2021-11-02 23:14:08,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:14:08,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735972699] [2021-11-02 23:14:08,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:14:08,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:14:08,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:08,921 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 23:14:08,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:14:08,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735972699] [2021-11-02 23:14:08,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735972699] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:14:08,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:14:08,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 23:14:08,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323861085] [2021-11-02 23:14:08,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 23:14:08,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:14:08,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 23:14:08,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:14:08,924 INFO L87 Difference]: Start difference. First operand 20873 states and 29749 transitions. Second operand has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:14:11,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:14:11,873 INFO L93 Difference]: Finished difference Result 34741 states and 49531 transitions. [2021-11-02 23:14:11,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 23:14:11,875 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-02 23:14:11,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:14:11,938 INFO L225 Difference]: With dead ends: 34741 [2021-11-02 23:14:11,939 INFO L226 Difference]: Without dead ends: 32371 [2021-11-02 23:14:11,952 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-02 23:14:11,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32371 states. [2021-11-02 23:14:14,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32371 to 23241. [2021-11-02 23:14:14,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23241 states, 23239 states have (on average 1.4247170704419294) internal successors, (33109), 23240 states have internal predecessors, (33109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:14:14,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23241 states to 23241 states and 33109 transitions. [2021-11-02 23:14:14,071 INFO L78 Accepts]: Start accepts. Automaton has 23241 states and 33109 transitions. Word has length 94 [2021-11-02 23:14:14,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:14:14,071 INFO L470 AbstractCegarLoop]: Abstraction has 23241 states and 33109 transitions. [2021-11-02 23:14:14,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:14:14,072 INFO L276 IsEmpty]: Start isEmpty. Operand 23241 states and 33109 transitions. [2021-11-02 23:14:14,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-02 23:14:14,080 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:14:14,080 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:14:14,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-02 23:14:14,081 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:14:14,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:14:14,082 INFO L85 PathProgramCache]: Analyzing trace with hash 2121264847, now seen corresponding path program 1 times [2021-11-02 23:14:14,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:14:14,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979796414] [2021-11-02 23:14:14,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:14:14,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:14:14,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:14,414 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:14:14,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:14:14,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979796414] [2021-11-02 23:14:14,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979796414] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:14:14,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604183384] [2021-11-02 23:14:14,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:14:14,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:14:14,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c75bd8-e238-4bfd-a248-44c73122fc50/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:14:14,425 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c75bd8-e238-4bfd-a248-44c73122fc50/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:14:14,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c75bd8-e238-4bfd-a248-44c73122fc50/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 23:14:14,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:14,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 23:14:14,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:14:15,368 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 23:14:15,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604183384] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:14:15,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:14:15,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4] total 16 [2021-11-02 23:14:15,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141036132] [2021-11-02 23:14:15,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 23:14:15,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:14:15,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 23:14:15,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-11-02 23:14:15,371 INFO L87 Difference]: Start difference. First operand 23241 states and 33109 transitions. Second operand has 16 states, 16 states have (on average 11.4375) internal successors, (183), 16 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:14:30,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:14:30,768 INFO L93 Difference]: Finished difference Result 135764 states and 189820 transitions. [2021-11-02 23:14:30,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-11-02 23:14:30,769 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 11.4375) internal successors, (183), 16 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-02 23:14:30,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:14:31,114 INFO L225 Difference]: With dead ends: 135764 [2021-11-02 23:14:31,114 INFO L226 Difference]: Without dead ends: 114818 [2021-11-02 23:14:31,167 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2295 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1223, Invalid=5419, Unknown=0, NotChecked=0, Total=6642 [2021-11-02 23:14:31,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114818 states. [2021-11-02 23:14:38,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114818 to 72497. [2021-11-02 23:14:38,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72497 states, 72495 states have (on average 1.394482378095041) internal successors, (101093), 72496 states have internal predecessors, (101093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:14:39,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72497 states to 72497 states and 101093 transitions. [2021-11-02 23:14:39,092 INFO L78 Accepts]: Start accepts. Automaton has 72497 states and 101093 transitions. Word has length 95 [2021-11-02 23:14:39,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:14:39,093 INFO L470 AbstractCegarLoop]: Abstraction has 72497 states and 101093 transitions. [2021-11-02 23:14:39,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 11.4375) internal successors, (183), 16 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:14:39,093 INFO L276 IsEmpty]: Start isEmpty. Operand 72497 states and 101093 transitions. [2021-11-02 23:14:39,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-02 23:14:39,104 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:14:39,104 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:14:39,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c75bd8-e238-4bfd-a248-44c73122fc50/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 23:14:39,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c75bd8-e238-4bfd-a248-44c73122fc50/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:14:39,329 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:14:39,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:14:39,330 INFO L85 PathProgramCache]: Analyzing trace with hash -585492554, now seen corresponding path program 1 times [2021-11-02 23:14:39,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:14:39,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600006878] [2021-11-02 23:14:39,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:14:39,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:14:39,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:39,833 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:14:39,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:14:39,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600006878] [2021-11-02 23:14:39,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600006878] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:14:39,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776605167] [2021-11-02 23:14:39,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:14:39,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:14:39,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c75bd8-e238-4bfd-a248-44c73122fc50/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:14:39,862 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c75bd8-e238-4bfd-a248-44c73122fc50/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:14:39,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9c75bd8-e238-4bfd-a248-44c73122fc50/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 23:14:40,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:40,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-02 23:14:40,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:14:41,450 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:14:41,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776605167] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:14:41,451 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:14:41,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2021-11-02 23:14:41,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79622642] [2021-11-02 23:14:41,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-02 23:14:41,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:14:41,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-02 23:14:41,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-11-02 23:14:41,453 INFO L87 Difference]: Start difference. First operand 72497 states and 101093 transitions. Second operand has 22 states, 22 states have (on average 7.863636363636363) internal successors, (173), 21 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)