./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb4de848-193d-443a-8b67-12d09c8031a6/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb4de848-193d-443a-8b67-12d09c8031a6/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb4de848-193d-443a-8b67-12d09c8031a6/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb4de848-193d-443a-8b67-12d09c8031a6/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb4de848-193d-443a-8b67-12d09c8031a6/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb4de848-193d-443a-8b67-12d09c8031a6/bin/uautomizer-DrprNOufMa --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 68e1c5cf050539b3ee8f058d38ff7af5aea2a400d05e41e0185e4509f45301e0 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 22:15:26,705 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 22:15:26,706 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 22:15:26,736 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 22:15:26,737 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 22:15:26,738 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 22:15:26,740 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 22:15:26,742 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 22:15:26,744 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 22:15:26,745 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 22:15:26,746 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 22:15:26,748 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 22:15:26,748 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 22:15:26,749 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 22:15:26,751 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 22:15:26,752 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 22:15:26,753 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 22:15:26,754 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 22:15:26,756 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 22:15:26,758 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 22:15:26,760 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 22:15:26,762 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 22:15:26,763 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 22:15:26,764 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 22:15:26,767 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 22:15:26,768 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 22:15:26,768 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 22:15:26,769 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 22:15:26,769 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 22:15:26,771 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 22:15:26,771 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 22:15:26,772 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 22:15:26,773 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 22:15:26,773 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 22:15:26,774 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 22:15:26,774 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 22:15:26,775 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 22:15:26,775 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 22:15:26,775 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 22:15:26,776 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 22:15:26,777 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 22:15:26,778 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb4de848-193d-443a-8b67-12d09c8031a6/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 22:15:26,799 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 22:15:26,800 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 22:15:26,804 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 22:15:26,805 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 22:15:26,805 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 22:15:26,806 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 22:15:26,806 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 22:15:26,806 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 22:15:26,807 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 22:15:26,807 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 22:15:26,807 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 22:15:26,807 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 22:15:26,808 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 22:15:26,808 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 22:15:26,808 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 22:15:26,808 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 22:15:26,808 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 22:15:26,809 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 22:15:26,809 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 22:15:26,809 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 22:15:26,809 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 22:15:26,809 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 22:15:26,810 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 22:15:26,810 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 22:15:26,810 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 22:15:26,810 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 22:15:26,810 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 22:15:26,811 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 22:15:26,811 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 22:15:26,811 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 22:15:26,811 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 22:15:26,811 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 22:15:26,812 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 22:15:26,812 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 22:15:26,812 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_cb4de848-193d-443a-8b67-12d09c8031a6/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb4de848-193d-443a-8b67-12d09c8031a6/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68e1c5cf050539b3ee8f058d38ff7af5aea2a400d05e41e0185e4509f45301e0 [2021-12-06 22:15:26,995 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 22:15:27,010 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 22:15:27,012 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 22:15:27,013 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 22:15:27,013 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 22:15:27,014 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb4de848-193d-443a-8b67-12d09c8031a6/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i [2021-12-06 22:15:27,054 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb4de848-193d-443a-8b67-12d09c8031a6/bin/uautomizer-DrprNOufMa/data/f7ebe6e85/7f2550f59c1f46f282e1b78a385ff201/FLAG3be13172a [2021-12-06 22:15:27,466 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 22:15:27,466 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb4de848-193d-443a-8b67-12d09c8031a6/sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i [2021-12-06 22:15:27,476 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb4de848-193d-443a-8b67-12d09c8031a6/bin/uautomizer-DrprNOufMa/data/f7ebe6e85/7f2550f59c1f46f282e1b78a385ff201/FLAG3be13172a [2021-12-06 22:15:27,489 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb4de848-193d-443a-8b67-12d09c8031a6/bin/uautomizer-DrprNOufMa/data/f7ebe6e85/7f2550f59c1f46f282e1b78a385ff201 [2021-12-06 22:15:27,491 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 22:15:27,492 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 22:15:27,494 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 22:15:27,494 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 22:15:27,498 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 22:15:27,498 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 10:15:27" (1/1) ... [2021-12-06 22:15:27,500 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35e6cc3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:15:27, skipping insertion in model container [2021-12-06 22:15:27,500 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 10:15:27" (1/1) ... [2021-12-06 22:15:27,506 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 22:15:27,535 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 22:15:27,770 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb4de848-193d-443a-8b67-12d09c8031a6/sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i[25013,25026] [2021-12-06 22:15:27,773 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 22:15:27,780 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 22:15:27,821 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb4de848-193d-443a-8b67-12d09c8031a6/sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i[25013,25026] [2021-12-06 22:15:27,822 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 22:15:27,845 INFO L208 MainTranslator]: Completed translation [2021-12-06 22:15:27,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:15:27 WrapperNode [2021-12-06 22:15:27,846 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 22:15:27,846 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 22:15:27,846 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 22:15:27,847 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 22:15:27,852 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:15:27" (1/1) ... [2021-12-06 22:15:27,865 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:15:27" (1/1) ... [2021-12-06 22:15:27,889 INFO L137 Inliner]: procedures = 129, calls = 40, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 180 [2021-12-06 22:15:27,890 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 22:15:27,890 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 22:15:27,890 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 22:15:27,891 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 22:15:27,897 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:15:27" (1/1) ... [2021-12-06 22:15:27,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:15:27" (1/1) ... [2021-12-06 22:15:27,902 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:15:27" (1/1) ... [2021-12-06 22:15:27,902 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:15:27" (1/1) ... [2021-12-06 22:15:27,911 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:15:27" (1/1) ... [2021-12-06 22:15:27,916 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:15:27" (1/1) ... [2021-12-06 22:15:27,919 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:15:27" (1/1) ... [2021-12-06 22:15:27,923 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 22:15:27,924 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 22:15:27,924 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 22:15:27,924 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 22:15:27,925 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:15:27" (1/1) ... [2021-12-06 22:15:27,930 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 22:15:27,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb4de848-193d-443a-8b67-12d09c8031a6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:15:27,949 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb4de848-193d-443a-8b67-12d09c8031a6/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 22:15:27,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb4de848-193d-443a-8b67-12d09c8031a6/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 22:15:27,988 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-12-06 22:15:27,988 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-12-06 22:15:27,989 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 22:15:27,989 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 22:15:27,989 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 22:15:27,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-06 22:15:27,989 INFO L130 BoogieDeclarations]: Found specification of procedure sll_append [2021-12-06 22:15:27,989 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_append [2021-12-06 22:15:27,989 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-06 22:15:27,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 22:15:27,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-06 22:15:27,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 22:15:27,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 22:15:27,990 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 22:15:28,069 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 22:15:28,071 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 22:15:28,087 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-12-06 22:15:28,241 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 22:15:28,246 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 22:15:28,247 INFO L301 CfgBuilder]: Removed 9 assume(true) statements. [2021-12-06 22:15:28,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:15:28 BoogieIcfgContainer [2021-12-06 22:15:28,248 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 22:15:28,250 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 22:15:28,250 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 22:15:28,252 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 22:15:28,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 10:15:27" (1/3) ... [2021-12-06 22:15:28,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a6163d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 10:15:28, skipping insertion in model container [2021-12-06 22:15:28,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:15:27" (2/3) ... [2021-12-06 22:15:28,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a6163d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 10:15:28, skipping insertion in model container [2021-12-06 22:15:28,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:15:28" (3/3) ... [2021-12-06 22:15:28,254 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_of_sll_nondet_append-2.i [2021-12-06 22:15:28,258 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 22:15:28,258 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 22:15:28,293 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 22:15:28,298 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 22:15:28,298 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 22:15:28,311 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 43 states have (on average 1.627906976744186) internal successors, (70), 45 states have internal predecessors, (70), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 22:15:28,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-06 22:15:28,315 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:15:28,315 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:15:28,316 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:15:28,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:15:28,320 INFO L85 PathProgramCache]: Analyzing trace with hash 284890451, now seen corresponding path program 1 times [2021-12-06 22:15:28,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:15:28,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616978100] [2021-12-06 22:15:28,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:15:28,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:15:28,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:15:28,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 22:15:28,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:15:28,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:15:28,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:15:28,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616978100] [2021-12-06 22:15:28,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616978100] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:15:28,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:15:28,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:15:28,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097857508] [2021-12-06 22:15:28,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:15:28,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:15:28,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:15:28,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:15:28,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:15:28,559 INFO L87 Difference]: Start difference. First operand has 50 states, 43 states have (on average 1.627906976744186) internal successors, (70), 45 states have internal predecessors, (70), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 22:15:28,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:15:28,621 INFO L93 Difference]: Finished difference Result 98 states and 152 transitions. [2021-12-06 22:15:28,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:15:28,624 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-12-06 22:15:28,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:15:28,631 INFO L225 Difference]: With dead ends: 98 [2021-12-06 22:15:28,631 INFO L226 Difference]: Without dead ends: 38 [2021-12-06 22:15:28,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:15:28,638 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 2 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:15:28,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 105 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:15:28,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-06 22:15:28,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-12-06 22:15:28,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 34 states have internal predecessors, (46), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 22:15:28,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 50 transitions. [2021-12-06 22:15:28,673 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 50 transitions. Word has length 18 [2021-12-06 22:15:28,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:15:28,673 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 50 transitions. [2021-12-06 22:15:28,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 22:15:28,674 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 50 transitions. [2021-12-06 22:15:28,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-06 22:15:28,676 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:15:28,676 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:15:28,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 22:15:28,676 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:15:28,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:15:28,677 INFO L85 PathProgramCache]: Analyzing trace with hash 373470279, now seen corresponding path program 1 times [2021-12-06 22:15:28,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:15:28,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034319680] [2021-12-06 22:15:28,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:15:28,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:15:28,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:15:28,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 22:15:28,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:15:28,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:15:28,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:15:28,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034319680] [2021-12-06 22:15:28,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034319680] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:15:28,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:15:28,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 22:15:28,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967669974] [2021-12-06 22:15:28,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:15:28,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 22:15:28,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:15:28,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 22:15:28,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:15:28,779 INFO L87 Difference]: Start difference. First operand 38 states and 50 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 22:15:28,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:15:28,824 INFO L93 Difference]: Finished difference Result 74 states and 98 transitions. [2021-12-06 22:15:28,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 22:15:28,825 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-12-06 22:15:28,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:15:28,825 INFO L225 Difference]: With dead ends: 74 [2021-12-06 22:15:28,826 INFO L226 Difference]: Without dead ends: 45 [2021-12-06 22:15:28,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:15:28,827 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 7 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:15:28,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 115 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:15:28,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-06 22:15:28,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2021-12-06 22:15:28,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 states have internal predecessors, (47), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 22:15:28,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 51 transitions. [2021-12-06 22:15:28,834 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 51 transitions. Word has length 18 [2021-12-06 22:15:28,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:15:28,834 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 51 transitions. [2021-12-06 22:15:28,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 22:15:28,835 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 51 transitions. [2021-12-06 22:15:28,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-06 22:15:28,835 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:15:28,836 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:15:28,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 22:15:28,836 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:15:28,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:15:28,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1669671981, now seen corresponding path program 1 times [2021-12-06 22:15:28,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:15:28,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421746107] [2021-12-06 22:15:28,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:15:28,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:15:28,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:15:28,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:15:28,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:15:28,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:15:28,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:15:28,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421746107] [2021-12-06 22:15:28,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421746107] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:15:28,907 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:15:28,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 22:15:28,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980607280] [2021-12-06 22:15:28,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:15:28,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 22:15:28,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:15:28,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 22:15:28,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 22:15:28,909 INFO L87 Difference]: Start difference. First operand 39 states and 51 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 22:15:28,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:15:28,981 INFO L93 Difference]: Finished difference Result 59 states and 78 transitions. [2021-12-06 22:15:28,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 22:15:28,982 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-12-06 22:15:28,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:15:28,984 INFO L225 Difference]: With dead ends: 59 [2021-12-06 22:15:28,984 INFO L226 Difference]: Without dead ends: 57 [2021-12-06 22:15:28,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:15:28,986 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 57 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:15:28,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 114 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:15:28,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-06 22:15:28,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 41. [2021-12-06 22:15:28,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 37 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 22:15:28,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2021-12-06 22:15:28,995 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 23 [2021-12-06 22:15:28,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:15:28,996 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2021-12-06 22:15:28,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 22:15:28,996 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2021-12-06 22:15:28,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-06 22:15:28,997 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:15:28,997 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 22:15:28,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 22:15:28,998 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:15:28,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:15:28,998 INFO L85 PathProgramCache]: Analyzing trace with hash 2019272425, now seen corresponding path program 1 times [2021-12-06 22:15:28,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:15:28,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726527788] [2021-12-06 22:15:28,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:15:28,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:15:29,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:15:29,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:15:29,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:15:29,053 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:15:29,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:15:29,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726527788] [2021-12-06 22:15:29,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726527788] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:15:29,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:15:29,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 22:15:29,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186469851] [2021-12-06 22:15:29,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:15:29,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 22:15:29,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:15:29,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 22:15:29,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:15:29,055 INFO L87 Difference]: Start difference. First operand 41 states and 53 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 22:15:29,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:15:29,094 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2021-12-06 22:15:29,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 22:15:29,094 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-12-06 22:15:29,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:15:29,095 INFO L225 Difference]: With dead ends: 56 [2021-12-06 22:15:29,095 INFO L226 Difference]: Without dead ends: 44 [2021-12-06 22:15:29,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:15:29,096 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 13 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:15:29,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 113 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:15:29,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-06 22:15:29,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2021-12-06 22:15:29,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 38 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 22:15:29,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 54 transitions. [2021-12-06 22:15:29,102 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 54 transitions. Word has length 27 [2021-12-06 22:15:29,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:15:29,103 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 54 transitions. [2021-12-06 22:15:29,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 22:15:29,103 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 54 transitions. [2021-12-06 22:15:29,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 22:15:29,104 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:15:29,104 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:15:29,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 22:15:29,104 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:15:29,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:15:29,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1738961116, now seen corresponding path program 1 times [2021-12-06 22:15:29,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:15:29,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531910741] [2021-12-06 22:15:29,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:15:29,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:15:29,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:15:29,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:15:29,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:15:29,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:15:29,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:15:29,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531910741] [2021-12-06 22:15:29,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531910741] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:15:29,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61216202] [2021-12-06 22:15:29,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:15:29,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:15:29,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb4de848-193d-443a-8b67-12d09c8031a6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:15:29,156 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb4de848-193d-443a-8b67-12d09c8031a6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:15:29,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb4de848-193d-443a-8b67-12d09c8031a6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 22:15:29,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:15:29,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 22:15:29,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:15:29,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:15:29,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:15:29,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:15:29,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61216202] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:15:29,365 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:15:29,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2021-12-06 22:15:29,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795211416] [2021-12-06 22:15:29,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:15:29,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 22:15:29,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:15:29,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 22:15:29,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-06 22:15:29,367 INFO L87 Difference]: Start difference. First operand 42 states and 54 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 22:15:29,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:15:29,424 INFO L93 Difference]: Finished difference Result 94 states and 122 transitions. [2021-12-06 22:15:29,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 22:15:29,425 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2021-12-06 22:15:29,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:15:29,425 INFO L225 Difference]: With dead ends: 94 [2021-12-06 22:15:29,426 INFO L226 Difference]: Without dead ends: 62 [2021-12-06 22:15:29,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-06 22:15:29,427 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 47 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:15:29,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 140 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:15:29,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-06 22:15:29,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2021-12-06 22:15:29,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 51 states have internal predecessors, (67), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 22:15:29,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 75 transitions. [2021-12-06 22:15:29,434 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 75 transitions. Word has length 30 [2021-12-06 22:15:29,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:15:29,434 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 75 transitions. [2021-12-06 22:15:29,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 22:15:29,434 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 75 transitions. [2021-12-06 22:15:29,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-06 22:15:29,435 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:15:29,435 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:15:29,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb4de848-193d-443a-8b67-12d09c8031a6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 22:15:29,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb4de848-193d-443a-8b67-12d09c8031a6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:15:29,637 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:15:29,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:15:29,638 INFO L85 PathProgramCache]: Analyzing trace with hash -2109667236, now seen corresponding path program 2 times [2021-12-06 22:15:29,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:15:29,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001799603] [2021-12-06 22:15:29,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:15:29,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:15:29,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:15:29,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 22:15:29,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:15:29,847 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 22:15:29,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:15:29,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001799603] [2021-12-06 22:15:29,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001799603] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:15:29,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:15:29,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 22:15:29,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408127626] [2021-12-06 22:15:29,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:15:29,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 22:15:29,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:15:29,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 22:15:29,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 22:15:29,850 INFO L87 Difference]: Start difference. First operand 57 states and 75 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 22:15:29,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:15:29,908 INFO L93 Difference]: Finished difference Result 86 states and 115 transitions. [2021-12-06 22:15:29,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 22:15:29,909 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-12-06 22:15:29,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:15:29,912 INFO L225 Difference]: With dead ends: 86 [2021-12-06 22:15:29,912 INFO L226 Difference]: Without dead ends: 69 [2021-12-06 22:15:29,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-06 22:15:29,913 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 67 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:15:29,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 195 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:15:29,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-06 22:15:29,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2021-12-06 22:15:29,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 60 states have (on average 1.3166666666666667) internal successors, (79), 61 states have internal predecessors, (79), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-06 22:15:29,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 90 transitions. [2021-12-06 22:15:29,925 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 90 transitions. Word has length 40 [2021-12-06 22:15:29,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:15:29,925 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 90 transitions. [2021-12-06 22:15:29,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 22:15:29,925 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 90 transitions. [2021-12-06 22:15:29,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-06 22:15:29,927 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:15:29,927 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:15:29,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 22:15:29,928 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:15:29,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:15:29,928 INFO L85 PathProgramCache]: Analyzing trace with hash 949868902, now seen corresponding path program 1 times [2021-12-06 22:15:29,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:15:29,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402393968] [2021-12-06 22:15:29,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:15:29,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:15:29,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:15:29,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 22:15:29,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:15:30,012 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 22:15:30,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:15:30,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402393968] [2021-12-06 22:15:30,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402393968] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:15:30,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274454822] [2021-12-06 22:15:30,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:15:30,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:15:30,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb4de848-193d-443a-8b67-12d09c8031a6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:15:30,014 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb4de848-193d-443a-8b67-12d09c8031a6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:15:30,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb4de848-193d-443a-8b67-12d09c8031a6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 22:15:30,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:15:30,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 22:15:30,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:15:30,163 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 22:15:30,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:15:30,293 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 22:15:30,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274454822] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:15:30,293 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:15:30,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2021-12-06 22:15:30,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156716748] [2021-12-06 22:15:30,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:15:30,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 22:15:30,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:15:30,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 22:15:30,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-12-06 22:15:30,295 INFO L87 Difference]: Start difference. First operand 67 states and 90 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 22:15:30,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:15:30,375 INFO L93 Difference]: Finished difference Result 98 states and 132 transitions. [2021-12-06 22:15:30,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 22:15:30,376 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 43 [2021-12-06 22:15:30,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:15:30,377 INFO L225 Difference]: With dead ends: 98 [2021-12-06 22:15:30,377 INFO L226 Difference]: Without dead ends: 81 [2021-12-06 22:15:30,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-12-06 22:15:30,379 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 155 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:15:30,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 271 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:15:30,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-06 22:15:30,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 70. [2021-12-06 22:15:30,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 63 states have (on average 1.3174603174603174) internal successors, (83), 64 states have internal predecessors, (83), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-06 22:15:30,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 94 transitions. [2021-12-06 22:15:30,390 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 94 transitions. Word has length 43 [2021-12-06 22:15:30,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:15:30,390 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 94 transitions. [2021-12-06 22:15:30,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 22:15:30,390 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 94 transitions. [2021-12-06 22:15:30,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-06 22:15:30,391 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:15:30,392 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2021-12-06 22:15:30,412 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb4de848-193d-443a-8b67-12d09c8031a6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 22:15:30,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb4de848-193d-443a-8b67-12d09c8031a6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:15:30,593 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:15:30,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:15:30,595 INFO L85 PathProgramCache]: Analyzing trace with hash -204999652, now seen corresponding path program 2 times [2021-12-06 22:15:30,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:15:30,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496666026] [2021-12-06 22:15:30,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:15:30,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:15:30,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:15:30,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 22:15:30,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:15:30,781 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 22:15:30,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:15:30,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496666026] [2021-12-06 22:15:30,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496666026] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:15:30,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505603903] [2021-12-06 22:15:30,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:15:30,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:15:30,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb4de848-193d-443a-8b67-12d09c8031a6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:15:30,782 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb4de848-193d-443a-8b67-12d09c8031a6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:15:30,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb4de848-193d-443a-8b67-12d09c8031a6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 22:15:30,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:15:30,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:15:30,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 22:15:30,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:15:30,949 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 22:15:30,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:15:31,088 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 22:15:31,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505603903] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:15:31,089 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:15:31,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2021-12-06 22:15:31,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70399795] [2021-12-06 22:15:31,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:15:31,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 22:15:31,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:15:31,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 22:15:31,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-12-06 22:15:31,090 INFO L87 Difference]: Start difference. First operand 70 states and 94 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 22:15:31,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:15:31,179 INFO L93 Difference]: Finished difference Result 110 states and 149 transitions. [2021-12-06 22:15:31,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 22:15:31,179 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2021-12-06 22:15:31,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:15:31,180 INFO L225 Difference]: With dead ends: 110 [2021-12-06 22:15:31,180 INFO L226 Difference]: Without dead ends: 93 [2021-12-06 22:15:31,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2021-12-06 22:15:31,181 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 161 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:15:31,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 381 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:15:31,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-06 22:15:31,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2021-12-06 22:15:31,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 66 states have (on average 1.3181818181818181) internal successors, (87), 67 states have internal predecessors, (87), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-06 22:15:31,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 98 transitions. [2021-12-06 22:15:31,192 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 98 transitions. Word has length 46 [2021-12-06 22:15:31,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:15:31,192 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 98 transitions. [2021-12-06 22:15:31,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 22:15:31,193 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 98 transitions. [2021-12-06 22:15:31,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-06 22:15:31,194 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:15:31,195 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:15:31,215 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb4de848-193d-443a-8b67-12d09c8031a6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 22:15:31,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb4de848-193d-443a-8b67-12d09c8031a6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:15:31,399 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:15:31,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:15:31,400 INFO L85 PathProgramCache]: Analyzing trace with hash 2088916390, now seen corresponding path program 3 times [2021-12-06 22:15:31,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:15:31,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77778467] [2021-12-06 22:15:31,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:15:31,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:15:31,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:15:31,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 22:15:31,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:15:31,864 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-06 22:15:31,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:15:31,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77778467] [2021-12-06 22:15:31,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77778467] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:15:31,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:15:31,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-12-06 22:15:31,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283787732] [2021-12-06 22:15:31,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:15:31,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 22:15:31,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:15:31,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 22:15:31,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-12-06 22:15:31,865 INFO L87 Difference]: Start difference. First operand 73 states and 98 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 22:15:32,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:15:32,507 INFO L93 Difference]: Finished difference Result 180 states and 279 transitions. [2021-12-06 22:15:32,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 22:15:32,507 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2021-12-06 22:15:32,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:15:32,509 INFO L225 Difference]: With dead ends: 180 [2021-12-06 22:15:32,509 INFO L226 Difference]: Without dead ends: 164 [2021-12-06 22:15:32,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-12-06 22:15:32,511 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 126 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:15:32,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 448 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 22:15:32,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-12-06 22:15:32,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 101. [2021-12-06 22:15:32,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 92 states have (on average 1.315217391304348) internal successors, (121), 94 states have internal predecessors, (121), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-12-06 22:15:32,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 139 transitions. [2021-12-06 22:15:32,526 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 139 transitions. Word has length 49 [2021-12-06 22:15:32,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:15:32,526 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 139 transitions. [2021-12-06 22:15:32,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 22:15:32,527 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 139 transitions. [2021-12-06 22:15:32,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-06 22:15:32,528 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:15:32,528 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:15:32,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 22:15:32,528 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:15:32,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:15:32,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1569533394, now seen corresponding path program 1 times [2021-12-06 22:15:32,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:15:32,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864667610] [2021-12-06 22:15:32,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:15:32,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:15:32,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:15:32,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 22:15:32,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:15:33,065 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-06 22:15:33,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:15:33,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864667610] [2021-12-06 22:15:33,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864667610] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:15:33,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709128167] [2021-12-06 22:15:33,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:15:33,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:15:33,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb4de848-193d-443a-8b67-12d09c8031a6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:15:33,066 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb4de848-193d-443a-8b67-12d09c8031a6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:15:33,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb4de848-193d-443a-8b67-12d09c8031a6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 22:15:33,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:15:33,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 101 conjunts are in the unsatisfiable core [2021-12-06 22:15:33,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:15:33,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 22:15:33,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 22:15:33,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:15:33,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-06 22:15:33,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:15:33,936 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-06 22:15:33,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 53 [2021-12-06 22:15:34,049 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-06 22:15:34,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 54 [2021-12-06 22:15:34,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-12-06 22:15:34,190 INFO L354 Elim1Store]: treesize reduction 56, result has 45.1 percent of original size [2021-12-06 22:15:34,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 76 treesize of output 88 [2021-12-06 22:15:34,215 INFO L354 Elim1Store]: treesize reduction 72, result has 24.2 percent of original size [2021-12-06 22:15:34,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2021-12-06 22:15:35,266 INFO L354 Elim1Store]: treesize reduction 94, result has 27.1 percent of original size [2021-12-06 22:15:35,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 500 treesize of output 502 [2021-12-06 22:15:35,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:15:35,504 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-06 22:15:35,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 34 [2021-12-06 22:15:35,560 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-12-06 22:15:35,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 99 treesize of output 45 [2021-12-06 22:15:35,566 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 22:15:35,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:15:36,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:15:36,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:15:36,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16181 treesize of output 15573 [2021-12-06 22:15:36,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709128167] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:15:36,822 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 22:15:36,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 33 [2021-12-06 22:15:36,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038471489] [2021-12-06 22:15:36,823 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 22:15:36,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-06 22:15:36,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:15:36,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-06 22:15:36,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1233, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 22:15:36,824 INFO L87 Difference]: Start difference. First operand 101 states and 139 transitions. Second operand has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 29 states have internal predecessors, (61), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 22:15:37,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:15:37,709 INFO L93 Difference]: Finished difference Result 212 states and 330 transitions. [2021-12-06 22:15:37,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-06 22:15:37,709 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 29 states have internal predecessors, (61), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 50 [2021-12-06 22:15:37,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:15:37,711 INFO L225 Difference]: With dead ends: 212 [2021-12-06 22:15:37,711 INFO L226 Difference]: Without dead ends: 196 [2021-12-06 22:15:37,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=193, Invalid=2459, Unknown=0, NotChecked=0, Total=2652 [2021-12-06 22:15:37,713 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 41 mSDsluCounter, 1023 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1076 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 249 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:15:37,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 1076 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 411 Invalid, 0 Unknown, 249 Unchecked, 0.2s Time] [2021-12-06 22:15:37,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-12-06 22:15:37,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 141. [2021-12-06 22:15:37,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 127 states have (on average 1.31496062992126) internal successors, (167), 130 states have internal predecessors, (167), 9 states have call successors, (9), 1 states have call predecessors, (9), 4 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2021-12-06 22:15:37,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 206 transitions. [2021-12-06 22:15:37,729 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 206 transitions. Word has length 50 [2021-12-06 22:15:37,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:15:37,730 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 206 transitions. [2021-12-06 22:15:37,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 29 states have internal predecessors, (61), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 22:15:37,730 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 206 transitions. [2021-12-06 22:15:37,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-06 22:15:37,731 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:15:37,731 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:15:37,750 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb4de848-193d-443a-8b67-12d09c8031a6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 22:15:37,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb4de848-193d-443a-8b67-12d09c8031a6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 22:15:37,932 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:15:37,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:15:37,934 INFO L85 PathProgramCache]: Analyzing trace with hash 982640294, now seen corresponding path program 2 times [2021-12-06 22:15:37,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:15:37,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920077406] [2021-12-06 22:15:37,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:15:37,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:15:37,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:15:38,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 22:15:38,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:15:38,657 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 22:15:38,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:15:38,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920077406] [2021-12-06 22:15:38,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920077406] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:15:38,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600822457] [2021-12-06 22:15:38,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:15:38,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:15:38,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb4de848-193d-443a-8b67-12d09c8031a6/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:15:38,658 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb4de848-193d-443a-8b67-12d09c8031a6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:15:38,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb4de848-193d-443a-8b67-12d09c8031a6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 22:15:38,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:15:38,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:15:38,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 131 conjunts are in the unsatisfiable core [2021-12-06 22:15:38,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:15:38,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 22:15:38,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 22:15:39,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 22:15:39,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 22:15:39,184 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-06 22:15:39,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 44 [2021-12-06 22:15:39,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:15:39,376 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-12-06 22:15:39,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 70 [2021-12-06 22:15:39,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:15:39,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:15:39,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2021-12-06 22:15:39,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:15:39,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-12-06 22:15:39,494 INFO L354 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2021-12-06 22:15:39,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 138 treesize of output 81 [2021-12-06 22:15:39,637 INFO L354 Elim1Store]: treesize reduction 131, result has 33.5 percent of original size [2021-12-06 22:15:39,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 13 case distinctions, treesize of input 145 treesize of output 128 [2021-12-06 22:15:39,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:15:39,663 INFO L354 Elim1Store]: treesize reduction 96, result has 23.8 percent of original size [2021-12-06 22:15:39,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 46 [2021-12-06 22:15:40,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:15:40,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:15:40,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:15:40,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:15:40,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:15:40,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:15:40,146 INFO L354 Elim1Store]: treesize reduction 33, result has 19.5 percent of original size [2021-12-06 22:15:40,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 129 treesize of output 105 [2021-12-06 22:15:40,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:15:40,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:15:40,492 INFO L354 Elim1Store]: treesize reduction 90, result has 7.2 percent of original size [2021-12-06 22:15:40,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 7 case distinctions, treesize of input 115 treesize of output 60 [2021-12-06 22:15:40,576 INFO L354 Elim1Store]: treesize reduction 32, result has 34.7 percent of original size [2021-12-06 22:15:40,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 152 treesize of output 57 [2021-12-06 22:15:40,583 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-06 22:15:40,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:15:41,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:15:41,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:15:41,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:15:41,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:15:41,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:15:41,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:15:41,947 INFO L354 Elim1Store]: treesize reduction 5280, result has 0.0 percent of original size [2021-12-06 22:15:41,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 4 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 33 case distinctions, treesize of input 3813300 treesize of output 1 [2021-12-06 22:15:42,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:15:42,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:16:51,855 WARN L227 SmtUtils]: Spent 1.15m on a formula simplification. DAG size of input: 1545 DAG size of output: 911 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-12-06 22:16:51,860 INFO L354 Elim1Store]: treesize reduction 48527, result has 42.7 percent of original size [2021-12-06 22:16:51,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 31 select indices, 31 select index equivalence classes, 3 disjoint index pairs (out of 465 index pairs), introduced 38 new quantified variables, introduced 465 case distinctions, treesize of input 27755146267 treesize of output 25690692926