./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-pthread/cs_fib-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-pthread/cs_fib-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash da5783328d73eba8f05689c8b63c9b7f7c1c1eeab4600bb7173d3ddf64fb59e0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:20:16,655 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:20:16,658 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:20:16,690 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:20:16,694 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:20:16,695 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:20:16,697 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:20:16,700 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:20:16,707 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:20:16,708 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:20:16,709 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:20:16,711 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:20:16,713 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:20:16,717 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:20:16,719 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:20:16,722 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:20:16,725 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:20:16,730 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:20:16,733 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:20:16,736 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:20:16,741 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:20:16,742 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:20:16,745 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:20:16,746 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:20:16,753 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:20:16,755 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:20:16,755 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:20:16,757 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:20:16,758 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:20:16,760 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:20:16,760 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:20:16,761 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:20:16,764 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:20:16,765 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:20:16,767 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:20:16,767 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:20:16,768 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:20:16,768 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:20:16,768 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:20:16,769 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:20:16,770 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:20:16,771 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 22:20:16,816 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:20:16,817 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:20:16,826 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:20:16,827 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:20:16,829 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:20:16,829 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:20:16,829 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:20:16,830 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:20:16,830 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:20:16,830 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:20:16,831 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:20:16,831 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:20:16,832 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 22:20:16,832 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:20:16,832 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 22:20:16,832 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:20:16,833 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 22:20:16,833 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:20:16,833 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 22:20:16,833 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:20:16,834 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:20:16,834 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:20:16,834 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:20:16,835 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:20:16,835 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:20:16,835 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 22:20:16,835 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:20:16,836 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:20:16,836 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 22:20:16,837 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 22:20:16,838 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 22:20:16,838 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:20:16,838 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_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> da5783328d73eba8f05689c8b63c9b7f7c1c1eeab4600bb7173d3ddf64fb59e0 [2021-11-02 22:20:17,123 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:20:17,146 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:20:17,148 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:20:17,149 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:20:17,150 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:20:17,151 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/seq-pthread/cs_fib-1.i [2021-11-02 22:20:17,216 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/data/9a71be356/933e07f1c4784add94f6ea53cafe2b93/FLAG44813ae89 [2021-11-02 22:20:17,763 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:20:17,763 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/sv-benchmarks/c/seq-pthread/cs_fib-1.i [2021-11-02 22:20:17,785 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/data/9a71be356/933e07f1c4784add94f6ea53cafe2b93/FLAG44813ae89 [2021-11-02 22:20:18,052 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/data/9a71be356/933e07f1c4784add94f6ea53cafe2b93 [2021-11-02 22:20:18,055 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:20:18,056 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 22:20:18,058 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:20:18,058 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:20:18,061 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:20:18,062 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:20:18" (1/1) ... [2021-11-02 22:20:18,063 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@93a3795 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:20:18, skipping insertion in model container [2021-11-02 22:20:18,064 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:20:18" (1/1) ... [2021-11-02 22:20:18,071 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:20:18,123 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:20:18,463 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/sv-benchmarks/c/seq-pthread/cs_fib-1.i[23602,23615] [2021-11-02 22:20:18,561 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:20:18,576 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:20:18,605 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/sv-benchmarks/c/seq-pthread/cs_fib-1.i[23602,23615] [2021-11-02 22:20:18,699 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:20:18,744 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:20:18,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:20:18 WrapperNode [2021-11-02 22:20:18,744 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:20:18,745 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 22:20:18,745 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 22:20:18,746 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 22:20:18,754 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:20:18" (1/1) ... [2021-11-02 22:20:18,791 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:20:18" (1/1) ... [2021-11-02 22:20:18,899 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 22:20:18,900 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:20:18,901 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:20:18,901 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:20:18,910 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:20:18" (1/1) ... [2021-11-02 22:20:18,910 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:20:18" (1/1) ... [2021-11-02 22:20:18,949 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:20:18" (1/1) ... [2021-11-02 22:20:18,950 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:20:18" (1/1) ... [2021-11-02 22:20:19,029 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:20:18" (1/1) ... [2021-11-02 22:20:19,090 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:20:18" (1/1) ... [2021-11-02 22:20:19,100 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:20:18" (1/1) ... [2021-11-02 22:20:19,116 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:20:19,117 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:20:19,117 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:20:19,117 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:20:19,118 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:20:18" (1/1) ... [2021-11-02 22:20:19,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:20:19,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:20:19,177 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:20:19,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:20:19,212 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-02 22:20:19,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 22:20:19,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-02 22:20:19,213 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:20:19,213 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-02 22:20:19,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 22:20:19,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:20:19,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:20:19,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:20:19,430 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-02 22:20:19,431 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-02 22:20:19,450 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-02 22:20:19,451 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-02 22:20:19,469 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-02 22:20:19,470 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-02 22:20:24,390 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-12: assume 0 != __CS_cs_#t~nondet6 && 5 == ~__CS_round~0 % 256;__CS_cs_#t~ite7 := ~__CS_ret_PREEMPTED~0 % 256; [2021-11-02 22:20:24,390 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-12: assume !(0 != __CS_cs_#t~nondet6 && 5 == ~__CS_round~0 % 256);__CS_cs_#t~ite7 := ~__CS_ret~0 % 256; [2021-11-02 22:20:24,390 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-14: ~__CS_ret~0 := __CS_cs_#t~ite7;havoc __CS_cs_#t~nondet6;havoc __CS_cs_#t~ite7; [2021-11-02 22:20:24,390 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-15: assume 0 != __CS_cs_#t~nondet6 && 5 == ~__CS_round~0 % 256;__CS_cs_#t~ite7 := ~__CS_ret_PREEMPTED~0 % 256; [2021-11-02 22:20:24,390 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-15: assume !(0 != __CS_cs_#t~nondet6 && 5 == ~__CS_round~0 % 256);__CS_cs_#t~ite7 := ~__CS_ret~0 % 256; [2021-11-02 22:20:24,391 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-17: ~__CS_ret~0 := __CS_cs_#t~ite7;havoc __CS_cs_#t~nondet6;havoc __CS_cs_#t~ite7; [2021-11-02 22:20:24,391 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-18: assume 0 != __CS_cs_#t~nondet6 && 5 == ~__CS_round~0 % 256;__CS_cs_#t~ite7 := ~__CS_ret_PREEMPTED~0 % 256; [2021-11-02 22:20:24,391 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-18: assume !(0 != __CS_cs_#t~nondet6 && 5 == ~__CS_round~0 % 256);__CS_cs_#t~ite7 := ~__CS_ret~0 % 256; [2021-11-02 22:20:24,391 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##203: assume 0 == assume_abort_if_not_~cond;assume false; [2021-11-02 22:20:24,391 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-20: ~__CS_ret~0 := __CS_cs_#t~ite7;havoc __CS_cs_#t~nondet6;havoc __CS_cs_#t~ite7; [2021-11-02 22:20:24,391 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-60: assume 0 != __CS_cs_#t~nondet6 && 5 == ~__CS_round~0 % 256;__CS_cs_#t~ite7 := ~__CS_ret_PREEMPTED~0 % 256; [2021-11-02 22:20:24,391 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-60: assume !(0 != __CS_cs_#t~nondet6 && 5 == ~__CS_round~0 % 256);__CS_cs_#t~ite7 := ~__CS_ret~0 % 256; [2021-11-02 22:20:24,392 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-62: ~__CS_ret~0 := __CS_cs_#t~ite7;havoc __CS_cs_#t~nondet6;havoc __CS_cs_#t~ite7; [2021-11-02 22:20:24,392 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-63: assume 0 != __CS_cs_#t~nondet6 && 5 == ~__CS_round~0 % 256;__CS_cs_#t~ite7 := ~__CS_ret_PREEMPTED~0 % 256; [2021-11-02 22:20:24,392 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-63: assume !(0 != __CS_cs_#t~nondet6 && 5 == ~__CS_round~0 % 256);__CS_cs_#t~ite7 := ~__CS_ret~0 % 256; [2021-11-02 22:20:24,392 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-65: ~__CS_ret~0 := __CS_cs_#t~ite7;havoc __CS_cs_#t~nondet6;havoc __CS_cs_#t~ite7; [2021-11-02 22:20:24,392 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-66: assume 0 != __CS_cs_#t~nondet6 && 5 == ~__CS_round~0 % 256;__CS_cs_#t~ite7 := ~__CS_ret_PREEMPTED~0 % 256; [2021-11-02 22:20:24,392 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-66: assume !(0 != __CS_cs_#t~nondet6 && 5 == ~__CS_round~0 % 256);__CS_cs_#t~ite7 := ~__CS_ret~0 % 256; [2021-11-02 22:20:24,392 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-68: ~__CS_ret~0 := __CS_cs_#t~ite7;havoc __CS_cs_#t~nondet6;havoc __CS_cs_#t~ite7; [2021-11-02 22:20:24,392 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-108: assume 0 != __CS_cs_#t~nondet6 && 5 == ~__CS_round~0 % 256;__CS_cs_#t~ite7 := ~__CS_ret_PREEMPTED~0 % 256; [2021-11-02 22:20:24,393 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-108: assume !(0 != __CS_cs_#t~nondet6 && 5 == ~__CS_round~0 % 256);__CS_cs_#t~ite7 := ~__CS_ret~0 % 256; [2021-11-02 22:20:24,393 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-110: ~__CS_ret~0 := __CS_cs_#t~ite7;havoc __CS_cs_#t~nondet6;havoc __CS_cs_#t~ite7; [2021-11-02 22:20:24,393 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-111: assume 0 != __CS_cs_#t~nondet6 && 5 == ~__CS_round~0 % 256;__CS_cs_#t~ite7 := ~__CS_ret_PREEMPTED~0 % 256; [2021-11-02 22:20:24,393 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-111: assume !(0 != __CS_cs_#t~nondet6 && 5 == ~__CS_round~0 % 256);__CS_cs_#t~ite7 := ~__CS_ret~0 % 256; [2021-11-02 22:20:24,393 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-113: ~__CS_ret~0 := __CS_cs_#t~ite7;havoc __CS_cs_#t~nondet6;havoc __CS_cs_#t~ite7; [2021-11-02 22:20:24,393 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-114: assume 0 != __CS_cs_#t~nondet6 && 5 == ~__CS_round~0 % 256;__CS_cs_#t~ite7 := ~__CS_ret_PREEMPTED~0 % 256; [2021-11-02 22:20:24,393 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-114: assume !(0 != __CS_cs_#t~nondet6 && 5 == ~__CS_round~0 % 256);__CS_cs_#t~ite7 := ~__CS_ret~0 % 256; [2021-11-02 22:20:24,393 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-116: ~__CS_ret~0 := __CS_cs_#t~ite7;havoc __CS_cs_#t~nondet6;havoc __CS_cs_#t~ite7; [2021-11-02 22:20:24,394 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##204: assume !(0 == assume_abort_if_not_~cond); [2021-11-02 22:20:24,394 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##210: assume 0 == assume_abort_if_not_~cond;assume false; [2021-11-02 22:20:24,394 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##211: assume !(0 == assume_abort_if_not_~cond); [2021-11-02 22:20:24,394 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L5-4: ~__CS_round~0 := ~__CS_round~0 % 256 + __CS_cs_~k~0 % 256;assume -2147483648 <= __CS_cs_#t~nondet6 && __CS_cs_#t~nondet6 <= 2147483647; [2021-11-02 22:20:24,394 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L5-5: ~__CS_round~0 := ~__CS_round~0 % 256 + __CS_cs_~k~0 % 256;assume -2147483648 <= __CS_cs_#t~nondet6 && __CS_cs_#t~nondet6 <= 2147483647; [2021-11-02 22:20:24,394 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L5-6: ~__CS_round~0 := ~__CS_round~0 % 256 + __CS_cs_~k~0 % 256;assume -2147483648 <= __CS_cs_#t~nondet6 && __CS_cs_#t~nondet6 <= 2147483647; [2021-11-02 22:20:24,394 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L5-20: ~__CS_round~0 := ~__CS_round~0 % 256 + __CS_cs_~k~0 % 256;assume -2147483648 <= __CS_cs_#t~nondet6 && __CS_cs_#t~nondet6 <= 2147483647; [2021-11-02 22:20:24,395 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L5-21: ~__CS_round~0 := ~__CS_round~0 % 256 + __CS_cs_~k~0 % 256;assume -2147483648 <= __CS_cs_#t~nondet6 && __CS_cs_#t~nondet6 <= 2147483647; [2021-11-02 22:20:24,395 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L5-22: ~__CS_round~0 := ~__CS_round~0 % 256 + __CS_cs_~k~0 % 256;assume -2147483648 <= __CS_cs_#t~nondet6 && __CS_cs_#t~nondet6 <= 2147483647; [2021-11-02 22:20:24,395 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L5-36: ~__CS_round~0 := ~__CS_round~0 % 256 + __CS_cs_~k~0 % 256;assume -2147483648 <= __CS_cs_#t~nondet6 && __CS_cs_#t~nondet6 <= 2147483647; [2021-11-02 22:20:24,395 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L5-37: ~__CS_round~0 := ~__CS_round~0 % 256 + __CS_cs_~k~0 % 256;assume -2147483648 <= __CS_cs_#t~nondet6 && __CS_cs_#t~nondet6 <= 2147483647; [2021-11-02 22:20:24,395 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L5-38: ~__CS_round~0 := ~__CS_round~0 % 256 + __CS_cs_~k~0 % 256;assume -2147483648 <= __CS_cs_#t~nondet6 && __CS_cs_#t~nondet6 <= 2147483647; [2021-11-02 22:20:24,395 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L6-8: assume 0 == assume_abort_if_not_~cond;assume false; [2021-11-02 22:20:24,395 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L6-8: assume !(0 == assume_abort_if_not_~cond); [2021-11-02 22:20:24,396 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L6-36: assume 0 == assume_abort_if_not_~cond;assume false; [2021-11-02 22:20:24,396 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L6-36: assume !(0 == assume_abort_if_not_~cond); [2021-11-02 22:20:24,396 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L6-64: assume 0 == assume_abort_if_not_~cond;assume false; [2021-11-02 22:20:24,396 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L6-64: assume !(0 == assume_abort_if_not_~cond); [2021-11-02 22:20:24,396 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##61: assume !(0 == assume_abort_if_not_~cond); [2021-11-02 22:20:24,396 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##60: assume 0 == assume_abort_if_not_~cond;assume false; [2021-11-02 22:20:24,396 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##54: assume !(0 == assume_abort_if_not_~cond); [2021-11-02 22:20:24,396 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##53: assume 0 == assume_abort_if_not_~cond;assume false; [2021-11-02 22:20:24,397 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L562-4: assume 0 != ~__CS_ret~0 % 256;main_thread_#res.base, main_thread_#res.offset := 0, 0;call ULTIMATE.dealloc(main_thread_~#id1~0.base, main_thread_~#id1~0.offset);havoc main_thread_~#id1~0.base, main_thread_~#id1~0.offset;call ULTIMATE.dealloc(main_thread_~#id2~0.base, main_thread_~#id2~0.offset);havoc main_thread_~#id2~0.base, main_thread_~#id2~0.offset; [2021-11-02 22:20:24,397 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L562-4: assume !(0 != ~__CS_ret~0 % 256); [2021-11-02 22:20:24,397 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L562-5: assume 0 != ~__CS_ret~0 % 256;main_thread_#res.base, main_thread_#res.offset := 0, 0;call ULTIMATE.dealloc(main_thread_~#id1~0.base, main_thread_~#id1~0.offset);havoc main_thread_~#id1~0.base, main_thread_~#id1~0.offset;call ULTIMATE.dealloc(main_thread_~#id2~0.base, main_thread_~#id2~0.offset);havoc main_thread_~#id2~0.base, main_thread_~#id2~0.offset; [2021-11-02 22:20:24,397 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L562-5: assume !(0 != ~__CS_ret~0 % 256);havoc __CS_cs_#t~nondet5, __CS_cs_#t~nondet6, __CS_cs_#t~ite7, __CS_cs_~k~0;__CS_cs_~k~0 := __CS_cs_#t~nondet5;havoc __CS_cs_#t~nondet5;assume_abort_if_not_#in~cond := (if ~__CS_round~0 % 256 + __CS_cs_~k~0 % 256 < 6 then 1 else 0);havoc assume_abort_if_not_~cond;assume_abort_if_not_~cond := assume_abort_if_not_#in~cond; [2021-11-02 22:20:24,397 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L562-6: assume 0 != ~__CS_ret~0 % 256;main_thread_#res.base, main_thread_#res.offset := 0, 0;call ULTIMATE.dealloc(main_thread_~#id1~0.base, main_thread_~#id1~0.offset);havoc main_thread_~#id1~0.base, main_thread_~#id1~0.offset;call ULTIMATE.dealloc(main_thread_~#id2~0.base, main_thread_~#id2~0.offset);havoc main_thread_~#id2~0.base, main_thread_~#id2~0.offset; [2021-11-02 22:20:24,397 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L562-6: assume !(0 != ~__CS_ret~0 % 256); [2021-11-02 22:20:24,397 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##353: assume 0 == assume_abort_if_not_~cond;assume false; [2021-11-02 22:20:24,398 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##354: assume !(0 == assume_abort_if_not_~cond); [2021-11-02 22:20:24,398 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L562-20: assume 0 != ~__CS_ret~0 % 256;main_thread_#res.base, main_thread_#res.offset := 0, 0;call ULTIMATE.dealloc(main_thread_~#id1~0.base, main_thread_~#id1~0.offset);havoc main_thread_~#id1~0.base, main_thread_~#id1~0.offset;call ULTIMATE.dealloc(main_thread_~#id2~0.base, main_thread_~#id2~0.offset);havoc main_thread_~#id2~0.base, main_thread_~#id2~0.offset; [2021-11-02 22:20:24,398 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L562-20: assume !(0 != ~__CS_ret~0 % 256); [2021-11-02 22:20:24,398 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L562-21: assume 0 != ~__CS_ret~0 % 256;main_thread_#res.base, main_thread_#res.offset := 0, 0;call ULTIMATE.dealloc(main_thread_~#id1~0.base, main_thread_~#id1~0.offset);havoc main_thread_~#id1~0.base, main_thread_~#id1~0.offset;call ULTIMATE.dealloc(main_thread_~#id2~0.base, main_thread_~#id2~0.offset);havoc main_thread_~#id2~0.base, main_thread_~#id2~0.offset; [2021-11-02 22:20:24,398 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L562-21: assume !(0 != ~__CS_ret~0 % 256);havoc __CS_cs_#t~nondet5, __CS_cs_#t~nondet6, __CS_cs_#t~ite7, __CS_cs_~k~0;__CS_cs_~k~0 := __CS_cs_#t~nondet5;havoc __CS_cs_#t~nondet5;assume_abort_if_not_#in~cond := (if ~__CS_round~0 % 256 + __CS_cs_~k~0 % 256 < 6 then 1 else 0);havoc assume_abort_if_not_~cond;assume_abort_if_not_~cond := assume_abort_if_not_#in~cond; [2021-11-02 22:20:24,400 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L562-22: assume 0 != ~__CS_ret~0 % 256;main_thread_#res.base, main_thread_#res.offset := 0, 0;call ULTIMATE.dealloc(main_thread_~#id1~0.base, main_thread_~#id1~0.offset);havoc main_thread_~#id1~0.base, main_thread_~#id1~0.offset;call ULTIMATE.dealloc(main_thread_~#id2~0.base, main_thread_~#id2~0.offset);havoc main_thread_~#id2~0.base, main_thread_~#id2~0.offset; [2021-11-02 22:20:24,400 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L562-22: assume !(0 != ~__CS_ret~0 % 256); [2021-11-02 22:20:24,400 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L562-36: assume 0 != ~__CS_ret~0 % 256;main_thread_#res.base, main_thread_#res.offset := 0, 0;call ULTIMATE.dealloc(main_thread_~#id1~0.base, main_thread_~#id1~0.offset);havoc main_thread_~#id1~0.base, main_thread_~#id1~0.offset;call ULTIMATE.dealloc(main_thread_~#id2~0.base, main_thread_~#id2~0.offset);havoc main_thread_~#id2~0.base, main_thread_~#id2~0.offset; [2021-11-02 22:20:24,400 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L562-36: assume !(0 != ~__CS_ret~0 % 256); [2021-11-02 22:20:24,400 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##360: assume 0 == assume_abort_if_not_~cond;assume false; [2021-11-02 22:20:24,401 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L562-37: assume 0 != ~__CS_ret~0 % 256;main_thread_#res.base, main_thread_#res.offset := 0, 0;call ULTIMATE.dealloc(main_thread_~#id1~0.base, main_thread_~#id1~0.offset);havoc main_thread_~#id1~0.base, main_thread_~#id1~0.offset;call ULTIMATE.dealloc(main_thread_~#id2~0.base, main_thread_~#id2~0.offset);havoc main_thread_~#id2~0.base, main_thread_~#id2~0.offset; [2021-11-02 22:20:24,401 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L562-37: assume !(0 != ~__CS_ret~0 % 256);havoc __CS_cs_#t~nondet5, __CS_cs_#t~nondet6, __CS_cs_#t~ite7, __CS_cs_~k~0;__CS_cs_~k~0 := __CS_cs_#t~nondet5;havoc __CS_cs_#t~nondet5;assume_abort_if_not_#in~cond := (if ~__CS_round~0 % 256 + __CS_cs_~k~0 % 256 < 6 then 1 else 0);havoc assume_abort_if_not_~cond;assume_abort_if_not_~cond := assume_abort_if_not_#in~cond; [2021-11-02 22:20:24,401 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L562-38: assume 0 != ~__CS_ret~0 % 256;main_thread_#res.base, main_thread_#res.offset := 0, 0;call ULTIMATE.dealloc(main_thread_~#id1~0.base, main_thread_~#id1~0.offset);havoc main_thread_~#id1~0.base, main_thread_~#id1~0.offset;call ULTIMATE.dealloc(main_thread_~#id2~0.base, main_thread_~#id2~0.offset);havoc main_thread_~#id2~0.base, main_thread_~#id2~0.offset; [2021-11-02 22:20:24,401 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint L562-38: assume !(0 != ~__CS_ret~0 % 256); [2021-11-02 22:20:24,401 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##361: assume !(0 == assume_abort_if_not_~cond); [2021-11-02 22:20:24,415 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:20:24,416 INFO L299 CfgBuilder]: Removed 322 assume(true) statements. [2021-11-02 22:20:24,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:20:24 BoogieIcfgContainer [2021-11-02 22:20:24,419 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:20:24,420 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:20:24,421 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:20:24,424 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:20:24,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:20:18" (1/3) ... [2021-11-02 22:20:24,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67e9e14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:20:24, skipping insertion in model container [2021-11-02 22:20:24,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:20:18" (2/3) ... [2021-11-02 22:20:24,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67e9e14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:20:24, skipping insertion in model container [2021-11-02 22:20:24,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:20:24" (3/3) ... [2021-11-02 22:20:24,428 INFO L111 eAbstractionObserver]: Analyzing ICFG cs_fib-1.i [2021-11-02 22:20:24,434 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:20:24,434 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 22:20:24,487 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:20:24,493 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-02 22:20:24,494 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-02 22:20:24,524 INFO L276 IsEmpty]: Start isEmpty. Operand has 367 states, 365 states have (on average 1.5616438356164384) internal successors, (570), 366 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:24,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-02 22:20:24,559 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:24,559 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:20:24,560 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:20:24,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:24,572 INFO L85 PathProgramCache]: Analyzing trace with hash -747763947, now seen corresponding path program 1 times [2021-11-02 22:20:24,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:24,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550333045] [2021-11-02 22:20:24,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:24,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:24,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:25,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:20:25,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:25,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550333045] [2021-11-02 22:20:25,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550333045] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:20:25,012 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:20:25,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:20:25,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26042510] [2021-11-02 22:20:25,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:20:25,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:25,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:20:25,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:20:25,036 INFO L87 Difference]: Start difference. First operand has 367 states, 365 states have (on average 1.5616438356164384) internal successors, (570), 366 states have internal predecessors, (570), 0 states have call successors, (0), 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 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:25,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:25,163 INFO L93 Difference]: Finished difference Result 736 states and 1146 transitions. [2021-11-02 22:20:25,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:20:25,166 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-02 22:20:25,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:25,190 INFO L225 Difference]: With dead ends: 736 [2021-11-02 22:20:25,190 INFO L226 Difference]: Without dead ends: 367 [2021-11-02 22:20:25,203 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:20:25,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-11-02 22:20:25,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 364. [2021-11-02 22:20:25,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 1.3195592286501376) internal successors, (479), 363 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:25,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 479 transitions. [2021-11-02 22:20:25,267 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 479 transitions. Word has length 92 [2021-11-02 22:20:25,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:25,267 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 479 transitions. [2021-11-02 22:20:25,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:25,268 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 479 transitions. [2021-11-02 22:20:25,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-02 22:20:25,307 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:25,308 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:20:25,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:20:25,308 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:20:25,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:25,310 INFO L85 PathProgramCache]: Analyzing trace with hash -946928453, now seen corresponding path program 1 times [2021-11-02 22:20:25,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:25,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627091240] [2021-11-02 22:20:25,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:25,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:25,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:25,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:20:25,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:25,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627091240] [2021-11-02 22:20:25,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627091240] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:20:25,418 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:20:25,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:20:25,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052648754] [2021-11-02 22:20:25,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:20:25,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:25,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:20:25,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:20:25,421 INFO L87 Difference]: Start difference. First operand 364 states and 479 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:25,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:25,452 INFO L93 Difference]: Finished difference Result 727 states and 958 transitions. [2021-11-02 22:20:25,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:20:25,453 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-02 22:20:25,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:25,455 INFO L225 Difference]: With dead ends: 727 [2021-11-02 22:20:25,456 INFO L226 Difference]: Without dead ends: 366 [2021-11-02 22:20:25,457 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:20:25,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-11-02 22:20:25,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 365. [2021-11-02 22:20:25,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 1.3186813186813187) internal successors, (480), 364 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:25,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 480 transitions. [2021-11-02 22:20:25,479 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 480 transitions. Word has length 95 [2021-11-02 22:20:25,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:25,480 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 480 transitions. [2021-11-02 22:20:25,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:25,480 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 480 transitions. [2021-11-02 22:20:25,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-02 22:20:25,482 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:25,482 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:20:25,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 22:20:25,483 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:20:25,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:25,483 INFO L85 PathProgramCache]: Analyzing trace with hash -156011971, now seen corresponding path program 1 times [2021-11-02 22:20:25,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:25,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649925944] [2021-11-02 22:20:25,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:25,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:25,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:25,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:20:25,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:25,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649925944] [2021-11-02 22:20:25,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649925944] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:20:25,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128600144] [2021-11-02 22:20:25,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:25,609 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:20:25,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:20:25,622 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:20:25,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 22:20:25,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:25,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 718 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 22:20:25,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:20:26,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:20:26,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128600144] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:20:26,335 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:20:26,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-02 22:20:26,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46287459] [2021-11-02 22:20:26,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:20:26,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:26,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:20:26,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:20:26,338 INFO L87 Difference]: Start difference. First operand 365 states and 480 transitions. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:26,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:26,378 INFO L93 Difference]: Finished difference Result 730 states and 961 transitions. [2021-11-02 22:20:26,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:20:26,379 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 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 97 [2021-11-02 22:20:26,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:26,382 INFO L225 Difference]: With dead ends: 730 [2021-11-02 22:20:26,382 INFO L226 Difference]: Without dead ends: 368 [2021-11-02 22:20:26,383 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:20:26,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-11-02 22:20:26,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 367. [2021-11-02 22:20:26,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 1.3169398907103824) internal successors, (482), 366 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:26,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 482 transitions. [2021-11-02 22:20:26,400 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 482 transitions. Word has length 97 [2021-11-02 22:20:26,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:26,401 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 482 transitions. [2021-11-02 22:20:26,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:26,401 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 482 transitions. [2021-11-02 22:20:26,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-02 22:20:26,403 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:26,403 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-02 22:20:26,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:20:26,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:20:26,617 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:20:26,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:26,617 INFO L85 PathProgramCache]: Analyzing trace with hash -294484161, now seen corresponding path program 2 times [2021-11-02 22:20:26,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:26,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647450264] [2021-11-02 22:20:26,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:26,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:26,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:26,745 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:20:26,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:26,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647450264] [2021-11-02 22:20:26,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647450264] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:20:26,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710445288] [2021-11-02 22:20:26,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:20:26,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:20:26,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:20:26,771 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:20:26,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 22:20:28,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-02 22:20:28,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:20:28,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 22:20:28,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:20:29,462 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-02 22:20:29,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710445288] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:20:29,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:20:29,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-11-02 22:20:29,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244381953] [2021-11-02 22:20:29,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:20:29,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:29,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:20:29,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:20:29,466 INFO L87 Difference]: Start difference. First operand 367 states and 482 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:29,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:29,507 INFO L93 Difference]: Finished difference Result 637 states and 828 transitions. [2021-11-02 22:20:29,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:20:29,507 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 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 99 [2021-11-02 22:20:29,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:29,516 INFO L225 Difference]: With dead ends: 637 [2021-11-02 22:20:29,516 INFO L226 Difference]: Without dead ends: 492 [2021-11-02 22:20:29,517 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:20:29,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-11-02 22:20:29,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 490. [2021-11-02 22:20:29,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 1.3312883435582823) internal successors, (651), 489 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:29,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 651 transitions. [2021-11-02 22:20:29,534 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 651 transitions. Word has length 99 [2021-11-02 22:20:29,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:29,535 INFO L470 AbstractCegarLoop]: Abstraction has 490 states and 651 transitions. [2021-11-02 22:20:29,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:29,536 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 651 transitions. [2021-11-02 22:20:29,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-02 22:20:29,540 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:29,540 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-02 22:20:29,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 22:20:29,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:20:29,755 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:20:29,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:29,755 INFO L85 PathProgramCache]: Analyzing trace with hash -884381601, now seen corresponding path program 1 times [2021-11-02 22:20:29,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:29,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646844169] [2021-11-02 22:20:29,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:29,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:29,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:29,956 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:20:29,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:29,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646844169] [2021-11-02 22:20:29,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646844169] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:20:29,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630551815] [2021-11-02 22:20:29,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:29,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:20:29,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:20:29,960 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:20:29,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 22:20:30,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:30,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 957 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 22:20:30,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:20:30,698 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:20:30,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630551815] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:20:30,698 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:20:30,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-11-02 22:20:30,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405271993] [2021-11-02 22:20:30,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:20:30,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:30,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:20:30,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:20:30,701 INFO L87 Difference]: Start difference. First operand 490 states and 651 transitions. Second operand has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:30,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:30,857 INFO L93 Difference]: Finished difference Result 996 states and 1324 transitions. [2021-11-02 22:20:30,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 22:20:30,858 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 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 131 [2021-11-02 22:20:30,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:30,861 INFO L225 Difference]: With dead ends: 996 [2021-11-02 22:20:30,861 INFO L226 Difference]: Without dead ends: 509 [2021-11-02 22:20:30,862 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:20:30,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-11-02 22:20:30,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 501. [2021-11-02 22:20:30,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 1.326) internal successors, (663), 500 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:30,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 663 transitions. [2021-11-02 22:20:30,878 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 663 transitions. Word has length 131 [2021-11-02 22:20:30,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:30,878 INFO L470 AbstractCegarLoop]: Abstraction has 501 states and 663 transitions. [2021-11-02 22:20:30,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:30,879 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 663 transitions. [2021-11-02 22:20:30,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-02 22:20:30,881 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:30,881 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 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] [2021-11-02 22:20:30,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 22:20:31,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:20:31,107 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:20:31,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:31,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1376270319, now seen corresponding path program 2 times [2021-11-02 22:20:31,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:31,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076487904] [2021-11-02 22:20:31,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:31,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:31,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:31,427 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-02 22:20:31,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:31,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076487904] [2021-11-02 22:20:31,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076487904] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:20:31,428 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:20:31,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:20:31,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631151997] [2021-11-02 22:20:31,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:20:31,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:31,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:20:31,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:20:31,430 INFO L87 Difference]: Start difference. First operand 501 states and 663 transitions. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:33,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:33,722 INFO L93 Difference]: Finished difference Result 1092 states and 1386 transitions. [2021-11-02 22:20:33,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:20:33,727 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2021-11-02 22:20:33,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:33,734 INFO L225 Difference]: With dead ends: 1092 [2021-11-02 22:20:33,735 INFO L226 Difference]: Without dead ends: 856 [2021-11-02 22:20:33,737 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:20:33,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2021-11-02 22:20:33,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 660. [2021-11-02 22:20:33,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 659 states have (on average 1.3368740515933233) internal successors, (881), 659 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:33,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 881 transitions. [2021-11-02 22:20:33,759 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 881 transitions. Word has length 142 [2021-11-02 22:20:33,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:33,759 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 881 transitions. [2021-11-02 22:20:33,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:33,760 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 881 transitions. [2021-11-02 22:20:33,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-02 22:20:33,762 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:33,763 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 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] [2021-11-02 22:20:33,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 22:20:33,763 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:20:33,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:33,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1678227439, now seen corresponding path program 1 times [2021-11-02 22:20:33,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:33,764 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149984859] [2021-11-02 22:20:33,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:33,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:33,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:33,975 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-02 22:20:33,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:33,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149984859] [2021-11-02 22:20:33,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149984859] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:20:33,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:20:33,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:20:33,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762146524] [2021-11-02 22:20:33,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:20:33,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:33,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:20:33,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:20:33,982 INFO L87 Difference]: Start difference. First operand 660 states and 881 transitions. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:36,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:36,242 INFO L93 Difference]: Finished difference Result 1130 states and 1431 transitions. [2021-11-02 22:20:36,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:20:36,243 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2021-11-02 22:20:36,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:36,247 INFO L225 Difference]: With dead ends: 1130 [2021-11-02 22:20:36,247 INFO L226 Difference]: Without dead ends: 709 [2021-11-02 22:20:36,248 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:20:36,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2021-11-02 22:20:36,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 511. [2021-11-02 22:20:36,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 1.3098039215686275) internal successors, (668), 510 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:36,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 668 transitions. [2021-11-02 22:20:36,265 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 668 transitions. Word has length 142 [2021-11-02 22:20:36,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:36,265 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 668 transitions. [2021-11-02 22:20:36,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:36,266 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 668 transitions. [2021-11-02 22:20:36,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-02 22:20:36,268 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:36,268 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 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] [2021-11-02 22:20:36,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-02 22:20:36,269 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:20:36,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:36,269 INFO L85 PathProgramCache]: Analyzing trace with hash -198756369, now seen corresponding path program 1 times [2021-11-02 22:20:36,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:36,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733070404] [2021-11-02 22:20:36,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:36,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:36,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:36,481 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-02 22:20:36,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:36,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733070404] [2021-11-02 22:20:36,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733070404] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:20:36,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127729645] [2021-11-02 22:20:36,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:36,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:20:36,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:20:36,487 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:20:36,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 22:20:36,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:36,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 1004 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 22:20:36,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:20:37,283 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-02 22:20:37,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127729645] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:20:37,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:20:37,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-11-02 22:20:37,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660928322] [2021-11-02 22:20:37,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:20:37,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:37,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:20:37,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:20:37,286 INFO L87 Difference]: Start difference. First operand 511 states and 668 transitions. Second operand has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:37,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:37,344 INFO L93 Difference]: Finished difference Result 1018 states and 1332 transitions. [2021-11-02 22:20:37,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:20:37,345 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 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 142 [2021-11-02 22:20:37,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:37,348 INFO L225 Difference]: With dead ends: 1018 [2021-11-02 22:20:37,348 INFO L226 Difference]: Without dead ends: 528 [2021-11-02 22:20:37,349 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:20:37,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-11-02 22:20:37,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 520. [2021-11-02 22:20:37,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 519 states have (on average 1.30635838150289) internal successors, (678), 519 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:37,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 678 transitions. [2021-11-02 22:20:37,365 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 678 transitions. Word has length 142 [2021-11-02 22:20:37,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:37,365 INFO L470 AbstractCegarLoop]: Abstraction has 520 states and 678 transitions. [2021-11-02 22:20:37,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:37,366 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 678 transitions. [2021-11-02 22:20:37,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-02 22:20:37,368 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:37,368 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:20:37,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-02 22:20:37,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-02 22:20:37,577 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:20:37,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:37,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1114485599, now seen corresponding path program 2 times [2021-11-02 22:20:37,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:37,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497073248] [2021-11-02 22:20:37,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:37,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:37,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:37,746 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-02 22:20:37,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:37,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497073248] [2021-11-02 22:20:37,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497073248] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:20:37,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505641566] [2021-11-02 22:20:37,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:20:37,747 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:20:37,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:20:37,750 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:20:37,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 22:20:38,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-02 22:20:38,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:20:38,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 926 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-02 22:20:38,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:20:38,562 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-02 22:20:38,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505641566] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:20:38,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:20:38,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-02 22:20:38,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318059004] [2021-11-02 22:20:38,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:20:38,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:38,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:20:38,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:20:38,564 INFO L87 Difference]: Start difference. First operand 520 states and 678 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:38,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:38,694 INFO L93 Difference]: Finished difference Result 933 states and 1221 transitions. [2021-11-02 22:20:38,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:20:38,697 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2021-11-02 22:20:38,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:38,700 INFO L225 Difference]: With dead ends: 933 [2021-11-02 22:20:38,700 INFO L226 Difference]: Without dead ends: 459 [2021-11-02 22:20:38,701 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:20:38,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-11-02 22:20:38,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 459. [2021-11-02 22:20:38,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 1.3034934497816595) internal successors, (597), 458 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:38,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 597 transitions. [2021-11-02 22:20:38,716 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 597 transitions. Word has length 151 [2021-11-02 22:20:38,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:38,716 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 597 transitions. [2021-11-02 22:20:38,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:38,717 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 597 transitions. [2021-11-02 22:20:38,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-02 22:20:38,719 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:38,719 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:20:38,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-02 22:20:38,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:20:38,939 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:20:38,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:38,939 INFO L85 PathProgramCache]: Analyzing trace with hash 612659363, now seen corresponding path program 1 times [2021-11-02 22:20:38,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:38,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831084053] [2021-11-02 22:20:38,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:38,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:39,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:39,116 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-02 22:20:39,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:39,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831084053] [2021-11-02 22:20:39,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831084053] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:20:39,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004549933] [2021-11-02 22:20:39,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:39,117 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:20:39,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:20:39,118 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:20:39,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 22:20:39,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:39,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 1052 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 22:20:39,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:20:40,036 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-02 22:20:40,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004549933] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:20:40,037 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:20:40,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-02 22:20:40,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43471216] [2021-11-02 22:20:40,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:20:40,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:40,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:20:40,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:20:40,039 INFO L87 Difference]: Start difference. First operand 459 states and 597 transitions. Second operand has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:40,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:40,125 INFO L93 Difference]: Finished difference Result 905 states and 1180 transitions. [2021-11-02 22:20:40,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:20:40,127 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 0 states have call successors, (0), 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 151 [2021-11-02 22:20:40,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:40,131 INFO L225 Difference]: With dead ends: 905 [2021-11-02 22:20:40,132 INFO L226 Difference]: Without dead ends: 476 [2021-11-02 22:20:40,133 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:20:40,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-11-02 22:20:40,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 468. [2021-11-02 22:20:40,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 1.2997858672376874) internal successors, (607), 467 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:40,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 607 transitions. [2021-11-02 22:20:40,154 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 607 transitions. Word has length 151 [2021-11-02 22:20:40,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:40,155 INFO L470 AbstractCegarLoop]: Abstraction has 468 states and 607 transitions. [2021-11-02 22:20:40,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:40,155 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 607 transitions. [2021-11-02 22:20:40,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-02 22:20:40,158 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:40,158 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:20:40,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-02 22:20:40,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-02 22:20:40,375 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:20:40,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:40,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1533051953, now seen corresponding path program 2 times [2021-11-02 22:20:40,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:40,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493911031] [2021-11-02 22:20:40,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:40,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:40,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:40,621 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 166 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-02 22:20:40,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:40,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493911031] [2021-11-02 22:20:40,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493911031] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:20:40,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539177359] [2021-11-02 22:20:40,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:20:40,622 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:20:40,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:20:40,627 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:20:40,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-02 22:20:41,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-02 22:20:41,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:20:41,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 935 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-02 22:20:41,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:20:41,627 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2021-11-02 22:20:41,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539177359] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:20:41,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:20:41,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2021-11-02 22:20:41,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505443679] [2021-11-02 22:20:41,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:20:41,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:41,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:20:41,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:20:41,629 INFO L87 Difference]: Start difference. First operand 468 states and 607 transitions. Second operand has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:44,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:44,021 INFO L93 Difference]: Finished difference Result 958 states and 1257 transitions. [2021-11-02 22:20:44,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:20:44,024 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-11-02 22:20:44,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:44,028 INFO L225 Difference]: With dead ends: 958 [2021-11-02 22:20:44,028 INFO L226 Difference]: Without dead ends: 545 [2021-11-02 22:20:44,029 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:20:44,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-11-02 22:20:44,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 545. [2021-11-02 22:20:44,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 544 states have (on average 1.306985294117647) internal successors, (711), 544 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:44,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 711 transitions. [2021-11-02 22:20:44,048 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 711 transitions. Word has length 160 [2021-11-02 22:20:44,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:44,050 INFO L470 AbstractCegarLoop]: Abstraction has 545 states and 711 transitions. [2021-11-02 22:20:44,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:44,051 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 711 transitions. [2021-11-02 22:20:44,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-02 22:20:44,054 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:44,054 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:20:44,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-02 22:20:44,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-02 22:20:44,272 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:20:44,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:44,273 INFO L85 PathProgramCache]: Analyzing trace with hash 909770351, now seen corresponding path program 1 times [2021-11-02 22:20:44,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:44,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727883649] [2021-11-02 22:20:44,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:44,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:44,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:44,624 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 166 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-02 22:20:44,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:44,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727883649] [2021-11-02 22:20:44,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727883649] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:20:44,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935054498] [2021-11-02 22:20:44,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:44,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:20:44,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:20:44,627 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:20:44,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-02 22:20:45,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:45,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 1100 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 22:20:45,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:20:45,679 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 166 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-02 22:20:45,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935054498] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:20:45,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:20:45,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-11-02 22:20:45,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772243039] [2021-11-02 22:20:45,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:20:45,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:45,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:20:45,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:20:45,681 INFO L87 Difference]: Start difference. First operand 545 states and 711 transitions. Second operand has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:45,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:45,770 INFO L93 Difference]: Finished difference Result 1068 states and 1398 transitions. [2021-11-02 22:20:45,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:20:45,771 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 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 160 [2021-11-02 22:20:45,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:45,774 INFO L225 Difference]: With dead ends: 1068 [2021-11-02 22:20:45,774 INFO L226 Difference]: Without dead ends: 562 [2021-11-02 22:20:45,775 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:20:45,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-11-02 22:20:45,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 554. [2021-11-02 22:20:45,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 553 states have (on average 1.3037974683544304) internal successors, (721), 553 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:45,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 721 transitions. [2021-11-02 22:20:45,793 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 721 transitions. Word has length 160 [2021-11-02 22:20:45,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:45,793 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 721 transitions. [2021-11-02 22:20:45,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:45,794 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 721 transitions. [2021-11-02 22:20:45,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-02 22:20:45,796 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:45,797 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:20:45,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-02 22:20:46,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:20:46,023 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:20:46,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:46,023 INFO L85 PathProgramCache]: Analyzing trace with hash -352318815, now seen corresponding path program 2 times [2021-11-02 22:20:46,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:46,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815192488] [2021-11-02 22:20:46,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:46,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:46,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:46,285 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-02 22:20:46,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:46,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815192488] [2021-11-02 22:20:46,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815192488] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:20:46,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986599235] [2021-11-02 22:20:46,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:20:46,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:20:46,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:20:46,287 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:20:46,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-02 22:20:46,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-02 22:20:46,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:20:46,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 944 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-02 22:20:46,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:20:47,426 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2021-11-02 22:20:47,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986599235] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:20:47,426 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:20:47,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 12 [2021-11-02 22:20:47,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392942961] [2021-11-02 22:20:47,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:20:47,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:47,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:20:47,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-02 22:20:47,428 INFO L87 Difference]: Start difference. First operand 554 states and 721 transitions. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 5 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:48,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:48,336 INFO L93 Difference]: Finished difference Result 1294 states and 1681 transitions. [2021-11-02 22:20:48,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:20:48,337 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 5 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 169 [2021-11-02 22:20:48,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:48,341 INFO L225 Difference]: With dead ends: 1294 [2021-11-02 22:20:48,342 INFO L226 Difference]: Without dead ends: 784 [2021-11-02 22:20:48,343 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:20:48,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2021-11-02 22:20:48,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 690. [2021-11-02 22:20:48,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 689 states have (on average 1.2351233671988389) internal successors, (851), 689 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:48,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 851 transitions. [2021-11-02 22:20:48,367 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 851 transitions. Word has length 169 [2021-11-02 22:20:48,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:48,367 INFO L470 AbstractCegarLoop]: Abstraction has 690 states and 851 transitions. [2021-11-02 22:20:48,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 5 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:48,368 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 851 transitions. [2021-11-02 22:20:48,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-02 22:20:48,371 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:48,371 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:20:48,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-02 22:20:48,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:20:48,595 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:20:48,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:48,595 INFO L85 PathProgramCache]: Analyzing trace with hash 704712095, now seen corresponding path program 1 times [2021-11-02 22:20:48,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:48,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244032462] [2021-11-02 22:20:48,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:48,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:48,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:48,823 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-02 22:20:48,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:48,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244032462] [2021-11-02 22:20:48,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244032462] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:20:48,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218974221] [2021-11-02 22:20:48,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:48,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:20:48,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:20:48,825 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:20:48,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-02 22:20:49,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:49,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 1133 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 22:20:49,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:20:50,034 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-02 22:20:50,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218974221] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:20:50,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:20:50,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-11-02 22:20:50,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006431588] [2021-11-02 22:20:50,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:20:50,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:50,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:20:50,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:20:50,037 INFO L87 Difference]: Start difference. First operand 690 states and 851 transitions. Second operand has 9 states, 9 states have (on average 17.22222222222222) internal successors, (155), 9 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:50,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:50,141 INFO L93 Difference]: Finished difference Result 1341 states and 1659 transitions. [2021-11-02 22:20:50,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:20:50,142 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 17.22222222222222) internal successors, (155), 9 states have internal predecessors, (155), 0 states have call successors, (0), 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 169 [2021-11-02 22:20:50,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:50,146 INFO L225 Difference]: With dead ends: 1341 [2021-11-02 22:20:50,146 INFO L226 Difference]: Without dead ends: 699 [2021-11-02 22:20:50,148 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:20:50,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2021-11-02 22:20:50,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 699. [2021-11-02 22:20:50,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 698 states have (on average 1.2335243553008597) internal successors, (861), 698 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:50,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 861 transitions. [2021-11-02 22:20:50,173 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 861 transitions. Word has length 169 [2021-11-02 22:20:50,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:50,173 INFO L470 AbstractCegarLoop]: Abstraction has 699 states and 861 transitions. [2021-11-02 22:20:50,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.22222222222222) internal successors, (155), 9 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:20:50,174 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 861 transitions. [2021-11-02 22:20:50,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-02 22:20:50,177 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:50,177 INFO L513 BasicCegarLoop]: trace histogram [18, 18, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:20:50,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-02 22:20:50,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:20:50,403 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:20:50,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:50,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1683973715, now seen corresponding path program 2 times [2021-11-02 22:20:50,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:50,403 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091187353] [2021-11-02 22:20:50,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:50,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:57,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:58,519 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2021-11-02 22:20:58,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:58,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091187353] [2021-11-02 22:20:58,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091187353] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:20:58,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116232478] [2021-11-02 22:20:58,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:20:58,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:20:58,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:20:58,523 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:20:58,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12be45f9-036b-48f3-8ffc-13d9ff209ecd/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-02 22:20:59,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-02 22:20:59,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:20:59,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-02 22:20:59,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:20:59,948 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-02 22:20:59,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 250 treesize of output 240