./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label26.c --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_2a28e40a-e706-4b31-8921-dce052cf5160/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a28e40a-e706-4b31-8921-dce052cf5160/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_2a28e40a-e706-4b31-8921-dce052cf5160/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a28e40a-e706-4b31-8921-dce052cf5160/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label26.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a28e40a-e706-4b31-8921-dce052cf5160/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_2a28e40a-e706-4b31-8921-dce052cf5160/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 0887ed233b7d9ebaebc7d3592c7422f9d4fe2418c2eecfd5d225ad45a2570d74 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 20:25:56,770 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 20:25:56,772 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 20:25:56,794 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 20:25:56,795 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 20:25:56,795 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 20:25:56,797 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 20:25:56,799 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 20:25:56,800 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 20:25:56,801 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 20:25:56,802 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 20:25:56,803 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 20:25:56,803 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 20:25:56,804 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 20:25:56,805 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 20:25:56,806 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 20:25:56,807 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 20:25:56,808 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 20:25:56,809 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 20:25:56,811 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 20:25:56,813 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 20:25:56,814 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 20:25:56,815 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 20:25:56,816 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 20:25:56,819 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 20:25:56,819 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 20:25:56,819 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 20:25:56,820 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 20:25:56,820 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 20:25:56,821 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 20:25:56,821 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 20:25:56,822 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 20:25:56,823 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 20:25:56,823 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 20:25:56,824 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 20:25:56,825 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 20:25:56,825 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 20:25:56,825 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 20:25:56,826 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 20:25:56,826 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 20:25:56,827 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 20:25:56,828 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a28e40a-e706-4b31-8921-dce052cf5160/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 20:25:56,845 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 20:25:56,845 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 20:25:56,846 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 20:25:56,846 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 20:25:56,846 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 20:25:56,846 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 20:25:56,847 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 20:25:56,847 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 20:25:56,847 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 20:25:56,847 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 20:25:56,847 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 20:25:56,847 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 20:25:56,847 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 20:25:56,848 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 20:25:56,848 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 20:25:56,848 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 20:25:56,848 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 20:25:56,848 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 20:25:56,848 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 20:25:56,848 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 20:25:56,848 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 20:25:56,848 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 20:25:56,849 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 20:25:56,849 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 20:25:56,849 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 20:25:56,849 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 20:25:56,849 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 20:25:56,849 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 20:25:56,849 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 20:25:56,849 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 20:25:56,849 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 20:25:56,850 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 20:25:56,850 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 20:25:56,850 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 20:25:56,850 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_2a28e40a-e706-4b31-8921-dce052cf5160/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a28e40a-e706-4b31-8921-dce052cf5160/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0887ed233b7d9ebaebc7d3592c7422f9d4fe2418c2eecfd5d225ad45a2570d74 [2021-12-06 20:25:57,039 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 20:25:57,057 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 20:25:57,058 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 20:25:57,059 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 20:25:57,060 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 20:25:57,061 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a28e40a-e706-4b31-8921-dce052cf5160/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/eca-rers2012/Problem03_label26.c [2021-12-06 20:25:57,102 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a28e40a-e706-4b31-8921-dce052cf5160/bin/uautomizer-DrprNOufMa/data/3f6f3cb97/128c48ad75c34c06a1b5a0977c9b50f6/FLAGcf997fd27 [2021-12-06 20:25:57,585 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 20:25:57,586 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a28e40a-e706-4b31-8921-dce052cf5160/sv-benchmarks/c/eca-rers2012/Problem03_label26.c [2021-12-06 20:25:57,603 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a28e40a-e706-4b31-8921-dce052cf5160/bin/uautomizer-DrprNOufMa/data/3f6f3cb97/128c48ad75c34c06a1b5a0977c9b50f6/FLAGcf997fd27 [2021-12-06 20:25:58,090 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a28e40a-e706-4b31-8921-dce052cf5160/bin/uautomizer-DrprNOufMa/data/3f6f3cb97/128c48ad75c34c06a1b5a0977c9b50f6 [2021-12-06 20:25:58,093 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 20:25:58,094 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 20:25:58,096 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 20:25:58,096 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 20:25:58,099 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 20:25:58,100 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:25:58" (1/1) ... [2021-12-06 20:25:58,101 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@230151bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:25:58, skipping insertion in model container [2021-12-06 20:25:58,101 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:25:58" (1/1) ... [2021-12-06 20:25:58,108 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 20:25:58,158 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 20:25:58,500 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_2a28e40a-e706-4b31-8921-dce052cf5160/sv-benchmarks/c/eca-rers2012/Problem03_label26.c[55276,55289] [2021-12-06 20:25:58,526 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:25:58,533 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 20:25:58,673 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_2a28e40a-e706-4b31-8921-dce052cf5160/sv-benchmarks/c/eca-rers2012/Problem03_label26.c[55276,55289] [2021-12-06 20:25:58,685 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:25:58,697 INFO L208 MainTranslator]: Completed translation [2021-12-06 20:25:58,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:25:58 WrapperNode [2021-12-06 20:25:58,698 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 20:25:58,699 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 20:25:58,699 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 20:25:58,699 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 20:25:58,704 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:25:58" (1/1) ... [2021-12-06 20:25:58,726 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:25:58" (1/1) ... [2021-12-06 20:25:58,785 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2021-12-06 20:25:58,785 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 20:25:58,785 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 20:25:58,785 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 20:25:58,786 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 20:25:58,792 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:25:58" (1/1) ... [2021-12-06 20:25:58,793 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:25:58" (1/1) ... [2021-12-06 20:25:58,800 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:25:58" (1/1) ... [2021-12-06 20:25:58,800 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:25:58" (1/1) ... [2021-12-06 20:25:58,841 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:25:58" (1/1) ... [2021-12-06 20:25:58,851 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:25:58" (1/1) ... [2021-12-06 20:25:58,865 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:25:58" (1/1) ... [2021-12-06 20:25:58,877 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 20:25:58,877 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 20:25:58,878 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 20:25:58,878 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 20:25:58,878 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:25:58" (1/1) ... [2021-12-06 20:25:58,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 20:25:58,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a28e40a-e706-4b31-8921-dce052cf5160/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:25:58,906 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a28e40a-e706-4b31-8921-dce052cf5160/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 20:25:58,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a28e40a-e706-4b31-8921-dce052cf5160/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 20:25:58,934 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 20:25:58,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 20:25:58,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 20:25:58,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 20:25:58,990 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 20:25:58,991 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 20:25:59,985 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 20:25:59,995 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 20:25:59,995 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-06 20:25:59,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:25:59 BoogieIcfgContainer [2021-12-06 20:25:59,997 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 20:25:59,998 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 20:25:59,998 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 20:26:00,001 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 20:26:00,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 08:25:58" (1/3) ... [2021-12-06 20:26:00,002 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a02cce5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:26:00, skipping insertion in model container [2021-12-06 20:26:00,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:25:58" (2/3) ... [2021-12-06 20:26:00,002 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a02cce5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:26:00, skipping insertion in model container [2021-12-06 20:26:00,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:25:59" (3/3) ... [2021-12-06 20:26:00,003 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label26.c [2021-12-06 20:26:00,007 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 20:26:00,007 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 20:26:00,057 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 20:26:00,062 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 20:26:00,062 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 20:26:00,083 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:00,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-06 20:26:00,095 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:26:00,096 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:26:00,096 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:26:00,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:26:00,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1366884082, now seen corresponding path program 1 times [2021-12-06 20:26:00,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:26:00,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407271724] [2021-12-06 20:26:00,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:26:00,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:26:00,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:26:00,471 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 20:26:00,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:26:00,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407271724] [2021-12-06 20:26:00,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407271724] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:26:00,472 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:26:00,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 20:26:00,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125889831] [2021-12-06 20:26:00,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:26:00,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:26:00,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:26:00,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:26:00,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:26:00,501 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:01,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:26:01,187 INFO L93 Difference]: Finished difference Result 829 states and 1478 transitions. [2021-12-06 20:26:01,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:26:01,189 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2021-12-06 20:26:01,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:26:01,204 INFO L225 Difference]: With dead ends: 829 [2021-12-06 20:26:01,204 INFO L226 Difference]: Without dead ends: 463 [2021-12-06 20:26:01,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:26:01,211 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 135 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 20:26:01,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 127 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 20:26:01,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-12-06 20:26:01,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 449. [2021-12-06 20:26:01,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 1.6183035714285714) internal successors, (725), 448 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:01,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 725 transitions. [2021-12-06 20:26:01,279 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 725 transitions. Word has length 156 [2021-12-06 20:26:01,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:26:01,280 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 725 transitions. [2021-12-06 20:26:01,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:01,280 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 725 transitions. [2021-12-06 20:26:01,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-06 20:26:01,289 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:26:01,289 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:26:01,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 20:26:01,290 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:26:01,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:26:01,291 INFO L85 PathProgramCache]: Analyzing trace with hash 651571138, now seen corresponding path program 1 times [2021-12-06 20:26:01,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:26:01,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923988977] [2021-12-06 20:26:01,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:26:01,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:26:01,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:26:01,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:26:01,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:26:01,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923988977] [2021-12-06 20:26:01,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923988977] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:26:01,416 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:26:01,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 20:26:01,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407936042] [2021-12-06 20:26:01,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:26:01,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:26:01,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:26:01,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:26:01,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:26:01,420 INFO L87 Difference]: Start difference. First operand 449 states and 725 transitions. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 2 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:01,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:26:01,928 INFO L93 Difference]: Finished difference Result 1321 states and 2139 transitions. [2021-12-06 20:26:01,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:26:01,929 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 2 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 161 [2021-12-06 20:26:01,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:26:01,933 INFO L225 Difference]: With dead ends: 1321 [2021-12-06 20:26:01,933 INFO L226 Difference]: Without dead ends: 874 [2021-12-06 20:26:01,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:26:01,935 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 251 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:26:01,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 149 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 20:26:01,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2021-12-06 20:26:01,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 870. [2021-12-06 20:26:01,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 1.5132336018411967) internal successors, (1315), 869 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:01,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 1315 transitions. [2021-12-06 20:26:01,963 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 1315 transitions. Word has length 161 [2021-12-06 20:26:01,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:26:01,964 INFO L470 AbstractCegarLoop]: Abstraction has 870 states and 1315 transitions. [2021-12-06 20:26:01,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 2 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:01,964 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 1315 transitions. [2021-12-06 20:26:01,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-06 20:26:01,967 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:26:01,967 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:26:01,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 20:26:01,967 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:26:01,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:26:01,968 INFO L85 PathProgramCache]: Analyzing trace with hash 230881053, now seen corresponding path program 1 times [2021-12-06 20:26:01,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:26:01,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934962454] [2021-12-06 20:26:01,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:26:01,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:26:02,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:26:02,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:26:02,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:26:02,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934962454] [2021-12-06 20:26:02,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934962454] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:26:02,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134241105] [2021-12-06 20:26:02,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:26:02,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:26:02,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a28e40a-e706-4b31-8921-dce052cf5160/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:26:02,088 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a28e40a-e706-4b31-8921-dce052cf5160/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:26:02,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a28e40a-e706-4b31-8921-dce052cf5160/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 20:26:02,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:26:02,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 20:26:02,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:26:02,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 20:26:02,459 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:26:02,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134241105] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:26:02,459 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 20:26:02,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-06 20:26:02,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039705879] [2021-12-06 20:26:02,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:26:02,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:26:02,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:26:02,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:26:02,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:26:02,461 INFO L87 Difference]: Start difference. First operand 870 states and 1315 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:03,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:26:03,034 INFO L93 Difference]: Finished difference Result 2575 states and 3906 transitions. [2021-12-06 20:26:03,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:26:03,035 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2021-12-06 20:26:03,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:26:03,046 INFO L225 Difference]: With dead ends: 2575 [2021-12-06 20:26:03,046 INFO L226 Difference]: Without dead ends: 1707 [2021-12-06 20:26:03,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:26:03,049 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 114 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:26:03,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 176 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 20:26:03,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2021-12-06 20:26:03,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1700. [2021-12-06 20:26:03,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1700 states, 1699 states have (on average 1.4484991171277222) internal successors, (2461), 1699 states have internal predecessors, (2461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:03,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1700 states to 1700 states and 2461 transitions. [2021-12-06 20:26:03,098 INFO L78 Accepts]: Start accepts. Automaton has 1700 states and 2461 transitions. Word has length 163 [2021-12-06 20:26:03,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:26:03,099 INFO L470 AbstractCegarLoop]: Abstraction has 1700 states and 2461 transitions. [2021-12-06 20:26:03,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:03,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1700 states and 2461 transitions. [2021-12-06 20:26:03,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-12-06 20:26:03,104 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:26:03,104 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:26:03,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a28e40a-e706-4b31-8921-dce052cf5160/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 20:26:03,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a28e40a-e706-4b31-8921-dce052cf5160/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:26:03,305 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:26:03,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:26:03,305 INFO L85 PathProgramCache]: Analyzing trace with hash 134146819, now seen corresponding path program 1 times [2021-12-06 20:26:03,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:26:03,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105855671] [2021-12-06 20:26:03,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:26:03,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:26:03,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:26:03,365 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 20:26:03,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:26:03,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105855671] [2021-12-06 20:26:03,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105855671] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:26:03,365 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:26:03,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 20:26:03,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124319354] [2021-12-06 20:26:03,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:26:03,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:26:03,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:26:03,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:26:03,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:26:03,367 INFO L87 Difference]: Start difference. First operand 1700 states and 2461 transitions. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 2 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:03,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:26:03,929 INFO L93 Difference]: Finished difference Result 4226 states and 6097 transitions. [2021-12-06 20:26:03,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:26:03,929 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 2 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 173 [2021-12-06 20:26:03,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:26:03,940 INFO L225 Difference]: With dead ends: 4226 [2021-12-06 20:26:03,940 INFO L226 Difference]: Without dead ends: 2528 [2021-12-06 20:26:03,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:26:03,943 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 234 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:26:03,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 115 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 20:26:03,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2528 states. [2021-12-06 20:26:03,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2528 to 2527. [2021-12-06 20:26:03,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2527 states, 2526 states have (on average 1.4180522565320666) internal successors, (3582), 2526 states have internal predecessors, (3582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:03,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2527 states to 2527 states and 3582 transitions. [2021-12-06 20:26:03,984 INFO L78 Accepts]: Start accepts. Automaton has 2527 states and 3582 transitions. Word has length 173 [2021-12-06 20:26:03,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:26:03,984 INFO L470 AbstractCegarLoop]: Abstraction has 2527 states and 3582 transitions. [2021-12-06 20:26:03,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 2 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:03,985 INFO L276 IsEmpty]: Start isEmpty. Operand 2527 states and 3582 transitions. [2021-12-06 20:26:03,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-12-06 20:26:03,988 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:26:03,989 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:26:03,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 20:26:03,989 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:26:03,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:26:03,990 INFO L85 PathProgramCache]: Analyzing trace with hash -224481352, now seen corresponding path program 1 times [2021-12-06 20:26:03,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:26:03,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237285909] [2021-12-06 20:26:03,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:26:03,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:26:04,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:26:04,051 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 20:26:04,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:26:04,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237285909] [2021-12-06 20:26:04,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237285909] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:26:04,051 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:26:04,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:26:04,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976613444] [2021-12-06 20:26:04,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:26:04,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:26:04,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:26:04,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:26:04,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:26:04,053 INFO L87 Difference]: Start difference. First operand 2527 states and 3582 transitions. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:04,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:26:04,611 INFO L93 Difference]: Finished difference Result 7492 states and 10627 transitions. [2021-12-06 20:26:04,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:26:04,611 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 176 [2021-12-06 20:26:04,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:26:04,636 INFO L225 Difference]: With dead ends: 7492 [2021-12-06 20:26:04,636 INFO L226 Difference]: Without dead ends: 4967 [2021-12-06 20:26:04,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:26:04,641 INFO L933 BasicCegarLoop]: 393 mSDtfsCounter, 228 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:26:04,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 421 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 20:26:04,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4967 states. [2021-12-06 20:26:04,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4967 to 4965. [2021-12-06 20:26:04,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4965 states, 4964 states have (on average 1.267324738114424) internal successors, (6291), 4964 states have internal predecessors, (6291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:04,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4965 states to 4965 states and 6291 transitions. [2021-12-06 20:26:04,746 INFO L78 Accepts]: Start accepts. Automaton has 4965 states and 6291 transitions. Word has length 176 [2021-12-06 20:26:04,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:26:04,746 INFO L470 AbstractCegarLoop]: Abstraction has 4965 states and 6291 transitions. [2021-12-06 20:26:04,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:04,746 INFO L276 IsEmpty]: Start isEmpty. Operand 4965 states and 6291 transitions. [2021-12-06 20:26:04,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-06 20:26:04,754 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:26:04,754 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:26:04,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 20:26:04,754 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:26:04,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:26:04,755 INFO L85 PathProgramCache]: Analyzing trace with hash 36301232, now seen corresponding path program 1 times [2021-12-06 20:26:04,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:26:04,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472442065] [2021-12-06 20:26:04,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:26:04,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:26:04,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:26:04,836 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 20:26:04,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:26:04,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472442065] [2021-12-06 20:26:04,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472442065] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:26:04,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413405568] [2021-12-06 20:26:04,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:26:04,837 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:26:04,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a28e40a-e706-4b31-8921-dce052cf5160/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:26:04,838 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a28e40a-e706-4b31-8921-dce052cf5160/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:26:04,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a28e40a-e706-4b31-8921-dce052cf5160/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 20:26:04,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:26:04,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 20:26:04,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:26:05,114 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 20:26:05,115 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:26:05,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413405568] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:26:05,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 20:26:05,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-06 20:26:05,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122495316] [2021-12-06 20:26:05,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:26:05,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:26:05,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:26:05,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:26:05,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:26:05,116 INFO L87 Difference]: Start difference. First operand 4965 states and 6291 transitions. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:05,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:26:05,603 INFO L93 Difference]: Finished difference Result 14628 states and 18569 transitions. [2021-12-06 20:26:05,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:26:05,604 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-12-06 20:26:05,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:26:05,636 INFO L225 Difference]: With dead ends: 14628 [2021-12-06 20:26:05,636 INFO L226 Difference]: Without dead ends: 9665 [2021-12-06 20:26:05,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:26:05,641 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 244 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 20:26:05,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 179 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 20:26:05,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9665 states. [2021-12-06 20:26:05,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9665 to 9662. [2021-12-06 20:26:05,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9662 states, 9661 states have (on average 1.231860055894835) internal successors, (11901), 9661 states have internal predecessors, (11901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:05,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9662 states to 9662 states and 11901 transitions. [2021-12-06 20:26:05,770 INFO L78 Accepts]: Start accepts. Automaton has 9662 states and 11901 transitions. Word has length 190 [2021-12-06 20:26:05,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:26:05,770 INFO L470 AbstractCegarLoop]: Abstraction has 9662 states and 11901 transitions. [2021-12-06 20:26:05,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:05,771 INFO L276 IsEmpty]: Start isEmpty. Operand 9662 states and 11901 transitions. [2021-12-06 20:26:05,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-12-06 20:26:05,781 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:26:05,781 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:26:05,815 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a28e40a-e706-4b31-8921-dce052cf5160/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 20:26:05,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a28e40a-e706-4b31-8921-dce052cf5160/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:26:05,983 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:26:05,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:26:05,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1225881526, now seen corresponding path program 1 times [2021-12-06 20:26:05,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:26:05,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363310505] [2021-12-06 20:26:05,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:26:05,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:26:06,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:26:06,174 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:26:06,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:26:06,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363310505] [2021-12-06 20:26:06,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363310505] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:26:06,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393105431] [2021-12-06 20:26:06,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:26:06,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:26:06,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a28e40a-e706-4b31-8921-dce052cf5160/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:26:06,176 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a28e40a-e706-4b31-8921-dce052cf5160/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:26:06,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a28e40a-e706-4b31-8921-dce052cf5160/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 20:26:06,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:26:06,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 20:26:06,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:26:06,468 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 20:26:06,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:26:06,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393105431] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:26:06,469 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 20:26:06,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-06 20:26:06,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52500496] [2021-12-06 20:26:06,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:26:06,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:26:06,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:26:06,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:26:06,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:26:06,470 INFO L87 Difference]: Start difference. First operand 9662 states and 11901 transitions. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:07,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:26:07,008 INFO L93 Difference]: Finished difference Result 27274 states and 33746 transitions. [2021-12-06 20:26:07,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:26:07,008 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 194 [2021-12-06 20:26:07,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:26:07,047 INFO L225 Difference]: With dead ends: 27274 [2021-12-06 20:26:07,048 INFO L226 Difference]: Without dead ends: 17614 [2021-12-06 20:26:07,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:26:07,055 INFO L933 BasicCegarLoop]: 412 mSDtfsCounter, 83 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:26:07,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 443 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 20:26:07,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17614 states. [2021-12-06 20:26:07,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17614 to 17579. [2021-12-06 20:26:07,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17579 states, 17578 states have (on average 1.2199340084196155) internal successors, (21444), 17578 states have internal predecessors, (21444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:07,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17579 states to 17579 states and 21444 transitions. [2021-12-06 20:26:07,253 INFO L78 Accepts]: Start accepts. Automaton has 17579 states and 21444 transitions. Word has length 194 [2021-12-06 20:26:07,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:26:07,253 INFO L470 AbstractCegarLoop]: Abstraction has 17579 states and 21444 transitions. [2021-12-06 20:26:07,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:07,254 INFO L276 IsEmpty]: Start isEmpty. Operand 17579 states and 21444 transitions. [2021-12-06 20:26:07,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-12-06 20:26:07,268 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:26:07,268 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:26:07,289 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a28e40a-e706-4b31-8921-dce052cf5160/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 20:26:07,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a28e40a-e706-4b31-8921-dce052cf5160/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:26:07,470 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:26:07,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:26:07,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1479704765, now seen corresponding path program 1 times [2021-12-06 20:26:07,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:26:07,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440645662] [2021-12-06 20:26:07,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:26:07,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:26:07,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:26:07,590 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 53 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 20:26:07,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:26:07,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440645662] [2021-12-06 20:26:07,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440645662] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:26:07,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845049697] [2021-12-06 20:26:07,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:26:07,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:26:07,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a28e40a-e706-4b31-8921-dce052cf5160/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:26:07,591 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a28e40a-e706-4b31-8921-dce052cf5160/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:26:07,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a28e40a-e706-4b31-8921-dce052cf5160/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 20:26:07,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:26:07,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 20:26:07,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:26:07,944 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 20:26:07,944 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:26:07,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845049697] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:26:07,944 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 20:26:07,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-06 20:26:07,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27442925] [2021-12-06 20:26:07,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:26:07,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:26:07,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:26:07,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:26:07,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 20:26:07,946 INFO L87 Difference]: Start difference. First operand 17579 states and 21444 transitions. Second operand has 4 states, 4 states have (on average 48.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:08,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:26:08,706 INFO L93 Difference]: Finished difference Result 60850 states and 74308 transitions. [2021-12-06 20:26:08,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:26:08,707 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 48.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 204 [2021-12-06 20:26:08,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:26:08,758 INFO L225 Difference]: With dead ends: 60850 [2021-12-06 20:26:08,758 INFO L226 Difference]: Without dead ends: 43273 [2021-12-06 20:26:08,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 20:26:08,772 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 556 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 20:26:08,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [556 Valid, 439 Invalid, 939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 776 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 20:26:08,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43273 states. [2021-12-06 20:26:09,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43273 to 41842. [2021-12-06 20:26:09,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41842 states, 41841 states have (on average 1.211252121125212) internal successors, (50680), 41841 states have internal predecessors, (50680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:09,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41842 states to 41842 states and 50680 transitions. [2021-12-06 20:26:09,255 INFO L78 Accepts]: Start accepts. Automaton has 41842 states and 50680 transitions. Word has length 204 [2021-12-06 20:26:09,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:26:09,255 INFO L470 AbstractCegarLoop]: Abstraction has 41842 states and 50680 transitions. [2021-12-06 20:26:09,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:09,255 INFO L276 IsEmpty]: Start isEmpty. Operand 41842 states and 50680 transitions. [2021-12-06 20:26:09,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-12-06 20:26:09,275 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:26:09,275 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:26:09,296 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a28e40a-e706-4b31-8921-dce052cf5160/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 20:26:09,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a28e40a-e706-4b31-8921-dce052cf5160/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-06 20:26:09,477 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:26:09,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:26:09,479 INFO L85 PathProgramCache]: Analyzing trace with hash -954878154, now seen corresponding path program 1 times [2021-12-06 20:26:09,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:26:09,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681678192] [2021-12-06 20:26:09,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:26:09,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:26:09,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:26:09,639 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 47 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:26:09,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:26:09,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681678192] [2021-12-06 20:26:09,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681678192] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:26:09,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571510088] [2021-12-06 20:26:09,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:26:09,639 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:26:09,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a28e40a-e706-4b31-8921-dce052cf5160/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:26:09,640 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a28e40a-e706-4b31-8921-dce052cf5160/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:26:09,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a28e40a-e706-4b31-8921-dce052cf5160/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 20:26:09,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:26:09,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 20:26:09,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:26:09,919 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 20:26:09,920 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:26:09,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571510088] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:26:09,920 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 20:26:09,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-06 20:26:09,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055699692] [2021-12-06 20:26:09,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:26:09,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:26:09,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:26:09,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:26:09,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:26:09,921 INFO L87 Difference]: Start difference. First operand 41842 states and 50680 transitions. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:10,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:26:10,586 INFO L93 Difference]: Finished difference Result 83688 states and 101368 transitions. [2021-12-06 20:26:10,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:26:10,586 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 204 [2021-12-06 20:26:10,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:26:10,629 INFO L225 Difference]: With dead ends: 83688 [2021-12-06 20:26:10,630 INFO L226 Difference]: Without dead ends: 41848 [2021-12-06 20:26:10,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:26:10,653 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 122 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:26:10,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 100 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 20:26:10,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41848 states. [2021-12-06 20:26:10,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41848 to 41842. [2021-12-06 20:26:10,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41842 states, 41841 states have (on average 1.204990320499032) internal successors, (50418), 41841 states have internal predecessors, (50418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:11,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41842 states to 41842 states and 50418 transitions. [2021-12-06 20:26:11,094 INFO L78 Accepts]: Start accepts. Automaton has 41842 states and 50418 transitions. Word has length 204 [2021-12-06 20:26:11,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:26:11,095 INFO L470 AbstractCegarLoop]: Abstraction has 41842 states and 50418 transitions. [2021-12-06 20:26:11,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:11,095 INFO L276 IsEmpty]: Start isEmpty. Operand 41842 states and 50418 transitions. [2021-12-06 20:26:11,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-12-06 20:26:11,118 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:26:11,118 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:26:11,138 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a28e40a-e706-4b31-8921-dce052cf5160/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 20:26:11,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a28e40a-e706-4b31-8921-dce052cf5160/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:26:11,321 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:26:11,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:26:11,322 INFO L85 PathProgramCache]: Analyzing trace with hash 288029418, now seen corresponding path program 1 times [2021-12-06 20:26:11,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:26:11,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237668403] [2021-12-06 20:26:11,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:26:11,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:26:11,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:26:11,423 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 56 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 20:26:11,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:26:11,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237668403] [2021-12-06 20:26:11,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237668403] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:26:11,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942639261] [2021-12-06 20:26:11,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:26:11,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:26:11,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a28e40a-e706-4b31-8921-dce052cf5160/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:26:11,425 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a28e40a-e706-4b31-8921-dce052cf5160/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:26:11,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a28e40a-e706-4b31-8921-dce052cf5160/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 20:26:11,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:26:11,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 20:26:11,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:26:11,763 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 56 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 20:26:11,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:26:11,948 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 56 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 20:26:11,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942639261] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:26:11,949 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:26:11,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 6 [2021-12-06 20:26:11,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751835415] [2021-12-06 20:26:11,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:26:11,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 20:26:11,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:26:11,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 20:26:11,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 20:26:11,951 INFO L87 Difference]: Start difference. First operand 41842 states and 50418 transitions. Second operand has 6 states, 6 states have (on average 66.0) internal successors, (396), 6 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:14,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:26:14,428 INFO L93 Difference]: Finished difference Result 131242 states and 157949 transitions. [2021-12-06 20:26:14,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 20:26:14,428 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 66.0) internal successors, (396), 6 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 207 [2021-12-06 20:26:14,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:26:14,519 INFO L225 Difference]: With dead ends: 131242 [2021-12-06 20:26:14,519 INFO L226 Difference]: Without dead ends: 89401 [2021-12-06 20:26:14,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 418 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-12-06 20:26:14,539 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 2657 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 3833 mSolverCounterSat, 887 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2657 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 4720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 887 IncrementalHoareTripleChecker+Valid, 3833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:26:14,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2657 Valid, 411 Invalid, 4720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [887 Valid, 3833 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-06 20:26:14,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89401 states. [2021-12-06 20:26:15,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89401 to 87300. [2021-12-06 20:26:15,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87300 states, 87299 states have (on average 1.1552022359935394) internal successors, (100848), 87299 states have internal predecessors, (100848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:15,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87300 states to 87300 states and 100848 transitions. [2021-12-06 20:26:15,566 INFO L78 Accepts]: Start accepts. Automaton has 87300 states and 100848 transitions. Word has length 207 [2021-12-06 20:26:15,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:26:15,566 INFO L470 AbstractCegarLoop]: Abstraction has 87300 states and 100848 transitions. [2021-12-06 20:26:15,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 66.0) internal successors, (396), 6 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:15,566 INFO L276 IsEmpty]: Start isEmpty. Operand 87300 states and 100848 transitions. [2021-12-06 20:26:15,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-12-06 20:26:15,587 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:26:15,588 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:26:15,607 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a28e40a-e706-4b31-8921-dce052cf5160/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 20:26:15,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a28e40a-e706-4b31-8921-dce052cf5160/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 20:26:15,789 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:26:15,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:26:15,791 INFO L85 PathProgramCache]: Analyzing trace with hash -874272386, now seen corresponding path program 1 times [2021-12-06 20:26:15,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:26:15,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772576695] [2021-12-06 20:26:15,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:26:15,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:26:15,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:26:15,902 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 20:26:15,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:26:15,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772576695] [2021-12-06 20:26:15,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772576695] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:26:15,902 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:26:15,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:26:15,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526784076] [2021-12-06 20:26:15,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:26:15,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:26:15,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:26:15,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:26:15,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:26:15,903 INFO L87 Difference]: Start difference. First operand 87300 states and 100848 transitions. Second operand has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:16,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:26:16,847 INFO L93 Difference]: Finished difference Result 188238 states and 217751 transitions. [2021-12-06 20:26:16,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:26:16,848 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 249 [2021-12-06 20:26:16,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:26:16,947 INFO L225 Difference]: With dead ends: 188238 [2021-12-06 20:26:16,948 INFO L226 Difference]: Without dead ends: 100940 [2021-12-06 20:26:16,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:26:16,973 INFO L933 BasicCegarLoop]: 385 mSDtfsCounter, 142 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:26:16,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 408 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 20:26:17,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100940 states. [2021-12-06 20:26:17,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100940 to 100922. [2021-12-06 20:26:17,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100922 states, 100921 states have (on average 1.1462530097799268) internal successors, (115681), 100921 states have internal predecessors, (115681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:18,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100922 states to 100922 states and 115681 transitions. [2021-12-06 20:26:18,090 INFO L78 Accepts]: Start accepts. Automaton has 100922 states and 115681 transitions. Word has length 249 [2021-12-06 20:26:18,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:26:18,091 INFO L470 AbstractCegarLoop]: Abstraction has 100922 states and 115681 transitions. [2021-12-06 20:26:18,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:18,091 INFO L276 IsEmpty]: Start isEmpty. Operand 100922 states and 115681 transitions. [2021-12-06 20:26:18,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-12-06 20:26:18,128 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:26:18,128 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:26:18,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 20:26:18,128 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:26:18,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:26:18,129 INFO L85 PathProgramCache]: Analyzing trace with hash 2121214106, now seen corresponding path program 1 times [2021-12-06 20:26:18,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:26:18,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296600075] [2021-12-06 20:26:18,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:26:18,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:26:18,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:26:18,199 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-06 20:26:18,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:26:18,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296600075] [2021-12-06 20:26:18,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296600075] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:26:18,199 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:26:18,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 20:26:18,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735860029] [2021-12-06 20:26:18,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:26:18,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:26:18,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:26:18,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:26:18,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:26:18,201 INFO L87 Difference]: Start difference. First operand 100922 states and 115681 transitions. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:19,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:26:19,415 INFO L93 Difference]: Finished difference Result 226702 states and 260308 transitions. [2021-12-06 20:26:19,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:26:19,417 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 262 [2021-12-06 20:26:19,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:26:19,537 INFO L225 Difference]: With dead ends: 226702 [2021-12-06 20:26:19,537 INFO L226 Difference]: Without dead ends: 125782 [2021-12-06 20:26:19,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:26:19,558 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 217 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:26:19,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 138 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 20:26:19,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125782 states. [2021-12-06 20:26:20,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125782 to 125753. [2021-12-06 20:26:20,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125753 states, 125752 states have (on average 1.141969909027292) internal successors, (143605), 125752 states have internal predecessors, (143605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:20,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125753 states to 125753 states and 143605 transitions. [2021-12-06 20:26:20,795 INFO L78 Accepts]: Start accepts. Automaton has 125753 states and 143605 transitions. Word has length 262 [2021-12-06 20:26:20,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:26:20,795 INFO L470 AbstractCegarLoop]: Abstraction has 125753 states and 143605 transitions. [2021-12-06 20:26:20,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:20,795 INFO L276 IsEmpty]: Start isEmpty. Operand 125753 states and 143605 transitions. [2021-12-06 20:26:20,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2021-12-06 20:26:20,830 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:26:20,831 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:26:20,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 20:26:20,831 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:26:20,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:26:20,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1876449921, now seen corresponding path program 1 times [2021-12-06 20:26:20,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:26:20,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013475887] [2021-12-06 20:26:20,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:26:20,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:26:20,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:26:20,913 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-12-06 20:26:20,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:26:20,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013475887] [2021-12-06 20:26:20,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013475887] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:26:20,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:26:20,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 20:26:20,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61991692] [2021-12-06 20:26:20,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:26:20,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:26:20,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:26:20,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:26:20,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:26:20,914 INFO L87 Difference]: Start difference. First operand 125753 states and 143605 transitions. Second operand has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 2 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:22,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:26:22,103 INFO L93 Difference]: Finished difference Result 288446 states and 332227 transitions. [2021-12-06 20:26:22,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:26:22,104 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 2 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 270 [2021-12-06 20:26:22,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:26:22,268 INFO L225 Difference]: With dead ends: 288446 [2021-12-06 20:26:22,268 INFO L226 Difference]: Without dead ends: 163304 [2021-12-06 20:26:22,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:26:22,331 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 154 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:26:22,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 201 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 20:26:22,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163304 states. [2021-12-06 20:26:24,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163304 to 163304. [2021-12-06 20:26:24,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163304 states, 163303 states have (on average 1.1156745436397373) internal successors, (182193), 163303 states have internal predecessors, (182193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:24,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163304 states to 163304 states and 182193 transitions. [2021-12-06 20:26:24,315 INFO L78 Accepts]: Start accepts. Automaton has 163304 states and 182193 transitions. Word has length 270 [2021-12-06 20:26:24,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:26:24,315 INFO L470 AbstractCegarLoop]: Abstraction has 163304 states and 182193 transitions. [2021-12-06 20:26:24,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 2 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:24,316 INFO L276 IsEmpty]: Start isEmpty. Operand 163304 states and 182193 transitions. [2021-12-06 20:26:24,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2021-12-06 20:26:24,342 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:26:24,342 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:26:24,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 20:26:24,342 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:26:24,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:26:24,343 INFO L85 PathProgramCache]: Analyzing trace with hash 691194018, now seen corresponding path program 1 times [2021-12-06 20:26:24,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:26:24,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431779083] [2021-12-06 20:26:24,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:26:24,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:26:24,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:26:24,425 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-12-06 20:26:24,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:26:24,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431779083] [2021-12-06 20:26:24,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431779083] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:26:24,425 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:26:24,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:26:24,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988015576] [2021-12-06 20:26:24,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:26:24,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:26:24,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:26:24,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:26:24,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:26:24,426 INFO L87 Difference]: Start difference. First operand 163304 states and 182193 transitions. Second operand has 4 states, 4 states have (on average 50.0) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:26,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:26:26,436 INFO L93 Difference]: Finished difference Result 488504 states and 545339 transitions. [2021-12-06 20:26:26,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:26:26,436 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 50.0) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 271 [2021-12-06 20:26:26,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:26:26,789 INFO L225 Difference]: With dead ends: 488504 [2021-12-06 20:26:26,789 INFO L226 Difference]: Without dead ends: 325811 [2021-12-06 20:26:26,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:26:26,856 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 800 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 800 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 20:26:26,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [800 Valid, 385 Invalid, 857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 711 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 20:26:27,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325811 states. [2021-12-06 20:26:30,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325811 to 325791. [2021-12-06 20:26:30,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325791 states, 325790 states have (on average 1.1155069216366371) internal successors, (363421), 325790 states have internal predecessors, (363421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:30,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325791 states to 325791 states and 363421 transitions. [2021-12-06 20:26:30,865 INFO L78 Accepts]: Start accepts. Automaton has 325791 states and 363421 transitions. Word has length 271 [2021-12-06 20:26:30,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:26:30,865 INFO L470 AbstractCegarLoop]: Abstraction has 325791 states and 363421 transitions. [2021-12-06 20:26:30,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.0) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:30,865 INFO L276 IsEmpty]: Start isEmpty. Operand 325791 states and 363421 transitions. [2021-12-06 20:26:30,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2021-12-06 20:26:30,895 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:26:30,895 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:26:30,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 20:26:30,895 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:26:30,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:26:30,896 INFO L85 PathProgramCache]: Analyzing trace with hash 863852814, now seen corresponding path program 1 times [2021-12-06 20:26:30,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:26:30,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013572337] [2021-12-06 20:26:30,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:26:30,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:26:30,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:26:30,975 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 145 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-06 20:26:30,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:26:30,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013572337] [2021-12-06 20:26:30,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013572337] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:26:30,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:26:30,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 20:26:30,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731337407] [2021-12-06 20:26:30,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:26:30,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:26:30,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:26:30,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:26:30,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:26:30,976 INFO L87 Difference]: Start difference. First operand 325791 states and 363421 transitions. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 2 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:33,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:26:33,421 INFO L93 Difference]: Finished difference Result 730811 states and 816541 transitions. [2021-12-06 20:26:33,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:26:33,422 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 2 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 304 [2021-12-06 20:26:33,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:26:33,911 INFO L225 Difference]: With dead ends: 730811 [2021-12-06 20:26:33,911 INFO L226 Difference]: Without dead ends: 405631 [2021-12-06 20:26:33,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:26:33,989 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 171 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 20:26:33,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 208 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 20:26:34,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405631 states. [2021-12-06 20:26:37,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405631 to 375184. [2021-12-06 20:26:38,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375184 states, 375183 states have (on average 1.1223536247644483) internal successors, (421088), 375183 states have internal predecessors, (421088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:38,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375184 states to 375184 states and 421088 transitions. [2021-12-06 20:26:38,740 INFO L78 Accepts]: Start accepts. Automaton has 375184 states and 421088 transitions. Word has length 304 [2021-12-06 20:26:38,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:26:38,741 INFO L470 AbstractCegarLoop]: Abstraction has 375184 states and 421088 transitions. [2021-12-06 20:26:38,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 2 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:38,741 INFO L276 IsEmpty]: Start isEmpty. Operand 375184 states and 421088 transitions. [2021-12-06 20:26:38,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2021-12-06 20:26:38,785 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:26:38,785 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:26:38,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-06 20:26:38,786 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:26:38,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:26:38,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1782638208, now seen corresponding path program 1 times [2021-12-06 20:26:38,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:26:38,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342587573] [2021-12-06 20:26:38,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:26:38,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:26:38,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:26:38,881 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-06 20:26:38,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:26:38,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342587573] [2021-12-06 20:26:38,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342587573] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:26:38,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:26:38,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 20:26:38,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546675141] [2021-12-06 20:26:38,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:26:38,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:26:38,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:26:38,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:26:38,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:26:38,882 INFO L87 Difference]: Start difference. First operand 375184 states and 421088 transitions. Second operand has 3 states, 3 states have (on average 77.0) internal successors, (231), 2 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:41,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:26:41,260 INFO L93 Difference]: Finished difference Result 749555 states and 841305 transitions. [2021-12-06 20:26:41,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:26:41,261 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 2 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 308 [2021-12-06 20:26:41,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:26:41,755 INFO L225 Difference]: With dead ends: 749555 [2021-12-06 20:26:41,755 INFO L226 Difference]: Without dead ends: 375388 [2021-12-06 20:26:41,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:26:41,900 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 133 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 20:26:41,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 197 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 20:26:42,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375388 states. [2021-12-06 20:26:45,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375388 to 375387. [2021-12-06 20:26:45,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375387 states, 375386 states have (on average 1.1223087701725691) internal successors, (421299), 375386 states have internal predecessors, (421299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:46,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375387 states to 375387 states and 421299 transitions. [2021-12-06 20:26:46,560 INFO L78 Accepts]: Start accepts. Automaton has 375387 states and 421299 transitions. Word has length 308 [2021-12-06 20:26:46,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:26:46,561 INFO L470 AbstractCegarLoop]: Abstraction has 375387 states and 421299 transitions. [2021-12-06 20:26:46,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 2 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:46,561 INFO L276 IsEmpty]: Start isEmpty. Operand 375387 states and 421299 transitions. [2021-12-06 20:26:46,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2021-12-06 20:26:46,607 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:26:46,608 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:26:46,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-06 20:26:46,608 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:26:46,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:26:46,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1507704574, now seen corresponding path program 1 times [2021-12-06 20:26:46,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:26:46,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90926644] [2021-12-06 20:26:46,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:26:46,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:26:46,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:26:46,712 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 179 proven. 11 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-06 20:26:46,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:26:46,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90926644] [2021-12-06 20:26:46,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90926644] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:26:46,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603324874] [2021-12-06 20:26:46,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:26:46,712 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:26:46,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a28e40a-e706-4b31-8921-dce052cf5160/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:26:46,713 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a28e40a-e706-4b31-8921-dce052cf5160/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:26:46,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a28e40a-e706-4b31-8921-dce052cf5160/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 20:26:46,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:26:46,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 20:26:46,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:26:47,034 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 240 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 20:26:47,034 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:26:47,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603324874] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:26:47,034 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 20:26:47,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-06 20:26:47,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298535533] [2021-12-06 20:26:47,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:26:47,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:26:47,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:26:47,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:26:47,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:26:47,036 INFO L87 Difference]: Start difference. First operand 375387 states and 421299 transitions. Second operand has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:49,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:26:49,968 INFO L93 Difference]: Finished difference Result 1021313 states and 1143235 transitions. [2021-12-06 20:26:49,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:26:49,969 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 325 [2021-12-06 20:26:49,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:26:50,868 INFO L225 Difference]: With dead ends: 1021313 [2021-12-06 20:26:50,868 INFO L226 Difference]: Without dead ends: 647146 [2021-12-06 20:26:51,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:26:51,052 INFO L933 BasicCegarLoop]: 667 mSDtfsCounter, 264 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 956 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:26:51,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 956 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:26:51,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647146 states. [2021-12-06 20:26:58,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647146 to 633689. [2021-12-06 20:26:58,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633689 states, 633688 states have (on average 1.1083088207445935) internal successors, (702322), 633688 states have internal predecessors, (702322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:59,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633689 states to 633689 states and 702322 transitions. [2021-12-06 20:26:59,588 INFO L78 Accepts]: Start accepts. Automaton has 633689 states and 702322 transitions. Word has length 325 [2021-12-06 20:26:59,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:26:59,589 INFO L470 AbstractCegarLoop]: Abstraction has 633689 states and 702322 transitions. [2021-12-06 20:26:59,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:26:59,589 INFO L276 IsEmpty]: Start isEmpty. Operand 633689 states and 702322 transitions. [2021-12-06 20:26:59,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2021-12-06 20:26:59,669 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:26:59,669 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:26:59,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a28e40a-e706-4b31-8921-dce052cf5160/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-06 20:26:59,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a28e40a-e706-4b31-8921-dce052cf5160/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 20:26:59,872 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:26:59,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:26:59,873 INFO L85 PathProgramCache]: Analyzing trace with hash -265742539, now seen corresponding path program 1 times [2021-12-06 20:26:59,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:26:59,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432028732] [2021-12-06 20:26:59,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:26:59,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:26:59,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:27:00,023 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 218 proven. 29 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-06 20:27:00,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:27:00,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432028732] [2021-12-06 20:27:00,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432028732] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:27:00,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154447353] [2021-12-06 20:27:00,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:27:00,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:27:00,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a28e40a-e706-4b31-8921-dce052cf5160/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:27:00,025 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a28e40a-e706-4b31-8921-dce052cf5160/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:27:00,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a28e40a-e706-4b31-8921-dce052cf5160/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 20:27:00,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:27:00,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 655 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 20:27:00,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:27:00,421 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 224 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-12-06 20:27:00,421 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:27:00,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154447353] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:27:00,422 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 20:27:00,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-06 20:27:00,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524027631] [2021-12-06 20:27:00,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:27:00,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:27:00,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:27:00,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:27:00,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:27:00,423 INFO L87 Difference]: Start difference. First operand 633689 states and 702322 transitions. Second operand has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 2 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:27:05,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:27:05,428 INFO L93 Difference]: Finished difference Result 1784681 states and 1977105 transitions. [2021-12-06 20:27:05,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:27:05,428 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 2 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 330 [2021-12-06 20:27:05,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:27:07,148 INFO L225 Difference]: With dead ends: 1784681 [2021-12-06 20:27:07,148 INFO L226 Difference]: Without dead ends: 1152212 [2021-12-06 20:27:07,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:27:07,413 INFO L933 BasicCegarLoop]: 318 mSDtfsCounter, 273 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:27:07,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 616 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:27:08,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152212 states. [2021-12-06 20:27:19,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152212 to 1152210. [2021-12-06 20:27:20,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152210 states, 1152209 states have (on average 1.1069857985834166) internal successors, (1275479), 1152209 states have internal predecessors, (1275479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:27:22,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152210 states to 1152210 states and 1275479 transitions. [2021-12-06 20:27:22,383 INFO L78 Accepts]: Start accepts. Automaton has 1152210 states and 1275479 transitions. Word has length 330 [2021-12-06 20:27:22,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:27:22,383 INFO L470 AbstractCegarLoop]: Abstraction has 1152210 states and 1275479 transitions. [2021-12-06 20:27:22,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 2 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:27:22,383 INFO L276 IsEmpty]: Start isEmpty. Operand 1152210 states and 1275479 transitions. [2021-12-06 20:27:22,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2021-12-06 20:27:22,457 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:27:22,458 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:27:22,479 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a28e40a-e706-4b31-8921-dce052cf5160/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 20:27:22,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a28e40a-e706-4b31-8921-dce052cf5160/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 20:27:22,660 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:27:22,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:27:22,661 INFO L85 PathProgramCache]: Analyzing trace with hash 552267401, now seen corresponding path program 1 times [2021-12-06 20:27:22,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:27:22,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801658216] [2021-12-06 20:27:22,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:27:22,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:27:22,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:27:22,804 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 250 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:27:22,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:27:22,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801658216] [2021-12-06 20:27:22,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801658216] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:27:22,804 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:27:22,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:27:22,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026538667] [2021-12-06 20:27:22,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:27:22,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:27:22,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:27:22,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:27:22,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:27:22,806 INFO L87 Difference]: Start difference. First operand 1152210 states and 1275479 transitions. Second operand has 4 states, 4 states have (on average 82.5) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:27:30,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:27:30,068 INFO L93 Difference]: Finished difference Result 2391426 states and 2648476 transitions. [2021-12-06 20:27:30,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:27:30,069 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 82.5) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 330 [2021-12-06 20:27:30,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:27:31,776 INFO L225 Difference]: With dead ends: 2391426 [2021-12-06 20:27:31,776 INFO L226 Difference]: Without dead ends: 1240436