./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/s1lif.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/s1lif.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cdcd45f06ced2bb4437693c85186d4d1862b19794596dce357397727796a8cdf --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 23:13:03,035 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 23:13:03,037 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 23:13:03,059 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 23:13:03,060 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 23:13:03,061 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 23:13:03,062 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 23:13:03,064 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 23:13:03,065 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 23:13:03,066 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 23:13:03,067 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 23:13:03,068 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 23:13:03,068 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 23:13:03,069 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 23:13:03,070 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 23:13:03,072 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 23:13:03,072 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 23:13:03,073 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 23:13:03,075 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 23:13:03,077 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 23:13:03,078 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 23:13:03,080 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 23:13:03,081 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 23:13:03,081 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 23:13:03,084 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 23:13:03,084 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 23:13:03,085 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 23:13:03,085 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 23:13:03,086 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 23:13:03,087 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 23:13:03,087 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 23:13:03,088 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 23:13:03,088 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 23:13:03,089 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 23:13:03,090 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 23:13:03,090 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 23:13:03,090 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 23:13:03,090 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 23:13:03,091 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 23:13:03,091 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 23:13:03,092 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 23:13:03,092 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 23:13:03,116 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 23:13:03,117 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 23:13:03,117 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 23:13:03,117 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 23:13:03,118 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 23:13:03,118 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 23:13:03,118 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 23:13:03,119 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 23:13:03,119 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 23:13:03,119 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 23:13:03,119 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 23:13:03,119 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 23:13:03,120 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 23:13:03,120 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 23:13:03,120 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 23:13:03,120 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 23:13:03,120 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 23:13:03,120 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 23:13:03,120 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 23:13:03,121 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 23:13:03,121 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 23:13:03,121 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 23:13:03,121 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 23:13:03,121 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 23:13:03,121 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 23:13:03,122 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 23:13:03,122 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 23:13:03,122 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 23:13:03,122 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 23:13:03,122 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 23:13:03,122 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 23:13:03,123 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 23:13:03,123 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 23:13:03,123 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 23:13:03,123 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_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cdcd45f06ced2bb4437693c85186d4d1862b19794596dce357397727796a8cdf [2021-12-06 23:13:03,310 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 23:13:03,327 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 23:13:03,329 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 23:13:03,330 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 23:13:03,331 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 23:13:03,332 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-fpi/s1lif.c [2021-12-06 23:13:03,386 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/data/092ece580/66d2759bcedb44d6be70bd91407b0eef/FLAG050ee44e3 [2021-12-06 23:13:03,788 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 23:13:03,788 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/sv-benchmarks/c/array-fpi/s1lif.c [2021-12-06 23:13:03,793 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/data/092ece580/66d2759bcedb44d6be70bd91407b0eef/FLAG050ee44e3 [2021-12-06 23:13:03,802 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/data/092ece580/66d2759bcedb44d6be70bd91407b0eef [2021-12-06 23:13:03,804 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 23:13:03,805 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 23:13:03,806 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 23:13:03,806 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 23:13:03,809 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 23:13:03,809 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 11:13:03" (1/1) ... [2021-12-06 23:13:03,810 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46cad234 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:13:03, skipping insertion in model container [2021-12-06 23:13:03,810 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 11:13:03" (1/1) ... [2021-12-06 23:13:03,816 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 23:13:03,826 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 23:13:03,970 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/sv-benchmarks/c/array-fpi/s1lif.c[588,601] [2021-12-06 23:13:03,989 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 23:13:03,996 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 23:13:04,006 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/sv-benchmarks/c/array-fpi/s1lif.c[588,601] [2021-12-06 23:13:04,013 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 23:13:04,023 INFO L208 MainTranslator]: Completed translation [2021-12-06 23:13:04,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:13:04 WrapperNode [2021-12-06 23:13:04,024 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 23:13:04,024 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 23:13:04,024 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 23:13:04,024 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 23:13:04,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:13:04" (1/1) ... [2021-12-06 23:13:04,035 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:13:04" (1/1) ... [2021-12-06 23:13:04,051 INFO L137 Inliner]: procedures = 17, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 81 [2021-12-06 23:13:04,051 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 23:13:04,052 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 23:13:04,052 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 23:13:04,052 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 23:13:04,059 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:13:04" (1/1) ... [2021-12-06 23:13:04,060 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:13:04" (1/1) ... [2021-12-06 23:13:04,062 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:13:04" (1/1) ... [2021-12-06 23:13:04,062 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:13:04" (1/1) ... [2021-12-06 23:13:04,068 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:13:04" (1/1) ... [2021-12-06 23:13:04,072 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:13:04" (1/1) ... [2021-12-06 23:13:04,073 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:13:04" (1/1) ... [2021-12-06 23:13:04,076 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 23:13:04,077 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 23:13:04,077 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 23:13:04,077 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 23:13:04,078 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:13:04" (1/1) ... [2021-12-06 23:13:04,084 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 23:13:04,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:13:04,102 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 23:13:04,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 23:13:04,132 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 23:13:04,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 23:13:04,132 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 23:13:04,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 23:13:04,132 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 23:13:04,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 23:13:04,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 23:13:04,133 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 23:13:04,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 23:13:04,183 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 23:13:04,184 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 23:13:04,275 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 23:13:04,280 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 23:13:04,280 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-06 23:13:04,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:13:04 BoogieIcfgContainer [2021-12-06 23:13:04,282 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 23:13:04,283 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 23:13:04,283 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 23:13:04,286 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 23:13:04,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 11:13:03" (1/3) ... [2021-12-06 23:13:04,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54f2bd0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 11:13:04, skipping insertion in model container [2021-12-06 23:13:04,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:13:04" (2/3) ... [2021-12-06 23:13:04,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54f2bd0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 11:13:04, skipping insertion in model container [2021-12-06 23:13:04,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:13:04" (3/3) ... [2021-12-06 23:13:04,289 INFO L111 eAbstractionObserver]: Analyzing ICFG s1lif.c [2021-12-06 23:13:04,292 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 23:13:04,293 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 23:13:04,329 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 23:13:04,334 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 23:13:04,334 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 23:13:04,345 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:13:04,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 23:13:04,350 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:13:04,350 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:13:04,351 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:13:04,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:13:04,355 INFO L85 PathProgramCache]: Analyzing trace with hash -845640729, now seen corresponding path program 1 times [2021-12-06 23:13:04,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:13:04,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584125564] [2021-12-06 23:13:04,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:13:04,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:13:04,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:13:04,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:13:04,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:13:04,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584125564] [2021-12-06 23:13:04,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584125564] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:13:04,507 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:13:04,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 23:13:04,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334675731] [2021-12-06 23:13:04,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:13:04,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 23:13:04,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:13:04,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 23:13:04,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 23:13:04,541 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:13:04,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:13:04,552 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2021-12-06 23:13:04,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 23:13:04,554 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2021-12-06 23:13:04,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:13:04,559 INFO L225 Difference]: With dead ends: 40 [2021-12-06 23:13:04,559 INFO L226 Difference]: Without dead ends: 18 [2021-12-06 23:13:04,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 23:13:04,564 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:13:04,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:13:04,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-06 23:13:04,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-12-06 23:13:04,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:13:04,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-12-06 23:13:04,588 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 13 [2021-12-06 23:13:04,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:13:04,588 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-12-06 23:13:04,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:13:04,589 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-12-06 23:13:04,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 23:13:04,589 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:13:04,589 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:13:04,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 23:13:04,590 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:13:04,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:13:04,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1238667739, now seen corresponding path program 1 times [2021-12-06 23:13:04,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:13:04,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983763882] [2021-12-06 23:13:04,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:13:04,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:13:04,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:13:04,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:13:04,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:13:04,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983763882] [2021-12-06 23:13:04,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983763882] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:13:04,649 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:13:04,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 23:13:04,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631236800] [2021-12-06 23:13:04,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:13:04,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 23:13:04,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:13:04,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 23:13:04,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:13:04,652 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:13:04,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:13:04,701 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2021-12-06 23:13:04,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 23:13:04,701 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2021-12-06 23:13:04,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:13:04,702 INFO L225 Difference]: With dead ends: 36 [2021-12-06 23:13:04,702 INFO L226 Difference]: Without dead ends: 25 [2021-12-06 23:13:04,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 23:13:04,704 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:13:04,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 11 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:13:04,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-06 23:13:04,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2021-12-06 23:13:04,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:13:04,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2021-12-06 23:13:04,711 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 13 [2021-12-06 23:13:04,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:13:04,711 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2021-12-06 23:13:04,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:13:04,712 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2021-12-06 23:13:04,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-06 23:13:04,712 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:13:04,713 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:13:04,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 23:13:04,713 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:13:04,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:13:04,714 INFO L85 PathProgramCache]: Analyzing trace with hash 2001188913, now seen corresponding path program 1 times [2021-12-06 23:13:04,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:13:04,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128505769] [2021-12-06 23:13:04,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:13:04,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:13:04,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:13:05,143 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:13:05,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:13:05,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128505769] [2021-12-06 23:13:05,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128505769] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:13:05,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708109141] [2021-12-06 23:13:05,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:13:05,145 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:13:05,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:13:05,146 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:13:05,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 23:13:05,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:13:05,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-06 23:13:05,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:13:05,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 23:13:05,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 23:13:05,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 23:13:05,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 23 [2021-12-06 23:13:05,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-12-06 23:13:05,636 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:13:05,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:13:05,858 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:13:05,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 28 [2021-12-06 23:13:05,904 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:13:05,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2021-12-06 23:13:05,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:13:05,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-12-06 23:13:05,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 23:13:05,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:13:05,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708109141] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:13:05,932 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:13:05,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 30 [2021-12-06 23:13:05,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380624297] [2021-12-06 23:13:05,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:13:05,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-06 23:13:05,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:13:05,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-06 23:13:05,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=693, Unknown=0, NotChecked=0, Total=870 [2021-12-06 23:13:05,935 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 30 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:13:06,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:13:06,141 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2021-12-06 23:13:06,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 23:13:06,142 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 30 states have internal predecessors, (49), 0 states have call successors, (0), 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 20 [2021-12-06 23:13:06,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:13:06,144 INFO L225 Difference]: With dead ends: 38 [2021-12-06 23:13:06,144 INFO L226 Difference]: Without dead ends: 34 [2021-12-06 23:13:06,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=224, Invalid=832, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 23:13:06,147 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 18 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:13:06,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 60 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 128 Invalid, 0 Unknown, 23 Unchecked, 0.1s Time] [2021-12-06 23:13:06,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-06 23:13:06,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2021-12-06 23:13:06,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:13:06,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2021-12-06 23:13:06,154 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 20 [2021-12-06 23:13:06,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:13:06,155 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2021-12-06 23:13:06,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 30 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:13:06,155 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2021-12-06 23:13:06,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-06 23:13:06,156 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:13:06,156 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:13:06,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 23:13:06,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:13:06,360 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:13:06,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:13:06,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1608161903, now seen corresponding path program 1 times [2021-12-06 23:13:06,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:13:06,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605391445] [2021-12-06 23:13:06,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:13:06,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:13:06,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:13:06,580 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:13:06,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:13:06,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605391445] [2021-12-06 23:13:06,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605391445] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:13:06,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364041902] [2021-12-06 23:13:06,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:13:06,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:13:06,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:13:06,582 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:13:06,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 23:13:06,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:13:06,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 23:13:06,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:13:06,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-12-06 23:13:06,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 23:13:06,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:13:06,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:13:06,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-12-06 23:13:06,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-12-06 23:13:06,710 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:13:06,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364041902] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:13:06,710 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:13:06,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-12-06 23:13:06,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603102424] [2021-12-06 23:13:06,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:13:06,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 23:13:06,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:13:06,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 23:13:06,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-06 23:13:06,712 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:13:06,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:13:06,779 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2021-12-06 23:13:06,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 23:13:06,779 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 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 20 [2021-12-06 23:13:06,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:13:06,780 INFO L225 Difference]: With dead ends: 48 [2021-12-06 23:13:06,780 INFO L226 Difference]: Without dead ends: 37 [2021-12-06 23:13:06,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-12-06 23:13:06,781 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 5 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:13:06,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 54 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:13:06,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-06 23:13:06,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2021-12-06 23:13:06,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:13:06,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2021-12-06 23:13:06,786 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 20 [2021-12-06 23:13:06,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:13:06,786 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2021-12-06 23:13:06,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:13:06,786 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2021-12-06 23:13:06,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-06 23:13:06,787 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:13:06,787 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:13:06,818 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 23:13:06,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:13:06,989 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:13:06,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:13:06,991 INFO L85 PathProgramCache]: Analyzing trace with hash -949569453, now seen corresponding path program 2 times [2021-12-06 23:13:06,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:13:07,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964418948] [2021-12-06 23:13:07,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:13:07,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:13:07,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:13:07,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:13:07,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:13:07,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964418948] [2021-12-06 23:13:07,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964418948] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:13:07,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200232071] [2021-12-06 23:13:07,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:13:07,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:13:07,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:13:07,149 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:13:07,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 23:13:07,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:13:07,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:13:07,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 23:13:07,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:13:07,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:13:07,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:13:07,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:13:07,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200232071] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:13:07,255 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:13:07,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-06 23:13:07,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45329656] [2021-12-06 23:13:07,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:13:07,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 23:13:07,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:13:07,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 23:13:07,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-06 23:13:07,256 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:13:07,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:13:07,325 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2021-12-06 23:13:07,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 23:13:07,325 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 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 22 [2021-12-06 23:13:07,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:13:07,325 INFO L225 Difference]: With dead ends: 70 [2021-12-06 23:13:07,326 INFO L226 Difference]: Without dead ends: 44 [2021-12-06 23:13:07,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-12-06 23:13:07,327 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 57 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:13:07,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 31 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:13:07,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-06 23:13:07,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2021-12-06 23:13:07,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:13:07,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-12-06 23:13:07,331 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 22 [2021-12-06 23:13:07,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:13:07,331 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-12-06 23:13:07,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:13:07,332 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-12-06 23:13:07,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-06 23:13:07,332 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:13:07,332 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:13:07,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-06 23:13:07,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:13:07,534 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:13:07,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:13:07,536 INFO L85 PathProgramCache]: Analyzing trace with hash -2105967953, now seen corresponding path program 3 times [2021-12-06 23:13:07,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:13:07,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677306200] [2021-12-06 23:13:07,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:13:07,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:13:07,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:13:07,607 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:13:07,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:13:07,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677306200] [2021-12-06 23:13:07,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677306200] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:13:07,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283331537] [2021-12-06 23:13:07,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 23:13:07,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:13:07,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:13:07,608 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:13:07,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 23:13:07,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 23:13:07,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:13:07,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 23:13:07,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:13:07,701 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:13:07,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:13:07,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 23:13:07,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283331537] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:13:07,736 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:13:07,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-06 23:13:07,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856252052] [2021-12-06 23:13:07,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:13:07,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 23:13:07,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:13:07,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 23:13:07,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-06 23:13:07,738 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:13:07,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:13:07,803 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-12-06 23:13:07,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 23:13:07,804 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 22 [2021-12-06 23:13:07,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:13:07,804 INFO L225 Difference]: With dead ends: 39 [2021-12-06 23:13:07,804 INFO L226 Difference]: Without dead ends: 31 [2021-12-06 23:13:07,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-12-06 23:13:07,805 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 50 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:13:07,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 30 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:13:07,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-06 23:13:07,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2021-12-06 23:13:07,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:13:07,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-12-06 23:13:07,810 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 22 [2021-12-06 23:13:07,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:13:07,810 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-12-06 23:13:07,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:13:07,811 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-12-06 23:13:07,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-06 23:13:07,812 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:13:07,812 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:13:07,831 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 23:13:08,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:13:08,014 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:13:08,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:13:08,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1032594067, now seen corresponding path program 4 times [2021-12-06 23:13:08,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:13:08,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633036088] [2021-12-06 23:13:08,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:13:08,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:13:08,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:13:08,566 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:13:08,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:13:08,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633036088] [2021-12-06 23:13:08,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633036088] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:13:08,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101010981] [2021-12-06 23:13:08,567 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 23:13:08,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:13:08,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:13:08,568 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:13:08,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 23:13:08,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 23:13:08,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:13:08,599 WARN L261 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-06 23:13:08,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:13:08,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 23:13:08,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:13:08,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 23:13:08,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:13:08,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 23:13:08,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:13:08,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 27 [2021-12-06 23:13:08,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:13:08,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:13:08,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2021-12-06 23:13:09,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:13:09,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:13:09,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:13:09,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 39 [2021-12-06 23:13:09,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:13:09,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2021-12-06 23:13:09,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:13:09,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 32 [2021-12-06 23:13:09,295 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:13:09,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:13:10,136 INFO L354 Elim1Store]: treesize reduction 52, result has 41.6 percent of original size [2021-12-06 23:13:10,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 554 treesize of output 290 [2021-12-06 23:13:10,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:13:10,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 67 [2021-12-06 23:13:10,301 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_4 (Array Int Int))) (let ((.cse2 (select v_arrayElimArr_4 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse5 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (or (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_arrayElimArr_4))) (let ((.cse4 (select .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse0 (select .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse1 (select (select (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 .cse2))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse5))) (and (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) (div (+ .cse0 .cse1 .cse2) 2)) (<= (div (+ (- 1) .cse0 .cse1 .cse2) 2) |c_ULTIMATE.start_main_~i~0#1|)))))) (not (= 2 .cse2)) (not (= 2 (select v_arrayElimArr_4 .cse5)))))) is different from false [2021-12-06 23:13:10,335 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_4 (Array Int Int))) (let ((.cse2 (select v_arrayElimArr_4 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse5 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (or (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_arrayElimArr_4))) (let ((.cse4 (select .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse0 (select .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse1 (select (select (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 .cse2))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse5))) (and (<= (div (+ (- 1) .cse0 .cse1 .cse2) 2) (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (<= (+ 2 |c_ULTIMATE.start_main_~i~0#1|) (div (+ .cse0 .cse1 .cse2) 2))))))) (not (= 2 .cse2)) (not (= 2 (select v_arrayElimArr_4 .cse5)))))) is different from false [2021-12-06 23:13:10,379 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2021-12-06 23:13:10,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101010981] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:13:10,380 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:13:10,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 18] total 50 [2021-12-06 23:13:10,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498824889] [2021-12-06 23:13:10,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:13:10,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-06 23:13:10,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:13:10,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-06 23:13:10,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=1936, Unknown=2, NotChecked=186, Total=2450 [2021-12-06 23:13:10,382 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 50 states, 50 states have (on average 1.36) internal successors, (68), 50 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:13:58,825 WARN L227 SmtUtils]: Spent 7.12s on a formula simplification. DAG size of input: 72 DAG size of output: 30 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 23:14:05,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:14:05,757 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2021-12-06 23:14:05,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 23:14:05,758 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.36) internal successors, (68), 50 states have internal predecessors, (68), 0 states have call successors, (0), 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 27 [2021-12-06 23:14:05,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:14:05,759 INFO L225 Difference]: With dead ends: 63 [2021-12-06 23:14:05,759 INFO L226 Difference]: Without dead ends: 59 [2021-12-06 23:14:05,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1114 ImplicationChecksByTransitivity, 53.8s TimeCoverageRelationStatistics Valid=495, Invalid=2804, Unknown=15, NotChecked=226, Total=3540 [2021-12-06 23:14:05,763 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 41 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-06 23:14:05,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 99 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 546 Invalid, 0 Unknown, 116 Unchecked, 2.9s Time] [2021-12-06 23:14:05,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-06 23:14:05,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 41. [2021-12-06 23:14:05,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.175) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:14:05,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2021-12-06 23:14:05,772 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 27 [2021-12-06 23:14:05,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:14:05,773 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2021-12-06 23:14:05,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.36) internal successors, (68), 50 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:14:05,773 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2021-12-06 23:14:05,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-06 23:14:05,774 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:14:05,774 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:14:05,797 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 23:14:05,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:14:05,975 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:14:05,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:14:05,975 INFO L85 PathProgramCache]: Analyzing trace with hash -774428629, now seen corresponding path program 1 times [2021-12-06 23:14:05,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:14:05,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276725636] [2021-12-06 23:14:05,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:14:05,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:14:05,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:14:06,853 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 23:14:06,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:14:06,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276725636] [2021-12-06 23:14:06,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276725636] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:14:06,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314068934] [2021-12-06 23:14:06,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:14:06,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:14:06,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:14:06,855 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:14:06,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 23:14:06,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:14:06,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 23:14:06,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:14:07,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 23:14:07,373 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 23:14:07,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 23:14:07,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-06 23:14:07,722 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 23:14:07,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:14:08,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-06 23:14:08,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 23:14:08,395 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 23:14:08,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314068934] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:14:08,395 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:14:08,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 18 [2021-12-06 23:14:08,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702155082] [2021-12-06 23:14:08,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:14:08,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 23:14:08,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:14:08,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 23:14:08,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-12-06 23:14:08,397 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:14:10,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:14:10,556 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2021-12-06 23:14:10,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 23:14:10,557 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 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 27 [2021-12-06 23:14:10,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:14:10,558 INFO L225 Difference]: With dead ends: 62 [2021-12-06 23:14:10,558 INFO L226 Difference]: Without dead ends: 49 [2021-12-06 23:14:10,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2021-12-06 23:14:10,560 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 29 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:14:10,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 52 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-06 23:14:10,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-06 23:14:10,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2021-12-06 23:14:10,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 42 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:14:10,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2021-12-06 23:14:10,567 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 27 [2021-12-06 23:14:10,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:14:10,567 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2021-12-06 23:14:10,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:14:10,567 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2021-12-06 23:14:10,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-06 23:14:10,568 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:14:10,568 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:14:10,592 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 23:14:10,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-06 23:14:10,770 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:14:10,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:14:10,771 INFO L85 PathProgramCache]: Analyzing trace with hash -132219249, now seen corresponding path program 5 times [2021-12-06 23:14:10,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:14:10,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974286071] [2021-12-06 23:14:10,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:14:10,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:14:10,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:14:11,168 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 23:14:11,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:14:11,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974286071] [2021-12-06 23:14:11,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974286071] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:14:11,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264224467] [2021-12-06 23:14:11,168 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 23:14:11,169 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:14:11,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:14:11,170 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:14:11,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 23:14:11,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-06 23:14:11,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:14:11,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 23:14:11,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:14:11,809 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 23:14:11,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:14:12,118 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 23:14:12,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264224467] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:14:12,118 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:14:12,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-06 23:14:12,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128338458] [2021-12-06 23:14:12,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:14:12,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 23:14:12,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:14:12,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 23:14:12,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-06 23:14:12,120 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:14:13,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:14:13,051 INFO L93 Difference]: Finished difference Result 86 states and 97 transitions. [2021-12-06 23:14:13,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 23:14:13,052 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 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 29 [2021-12-06 23:14:13,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:14:13,053 INFO L225 Difference]: With dead ends: 86 [2021-12-06 23:14:13,053 INFO L226 Difference]: Without dead ends: 53 [2021-12-06 23:14:13,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-12-06 23:14:13,055 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 74 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 23:14:13,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 35 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 23:14:13,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-06 23:14:13,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 39. [2021-12-06 23:14:13,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.131578947368421) internal successors, (43), 38 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:14:13,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2021-12-06 23:14:13,061 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 29 [2021-12-06 23:14:13,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:14:13,061 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2021-12-06 23:14:13,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:14:13,061 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2021-12-06 23:14:13,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-06 23:14:13,062 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:14:13,062 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:14:13,086 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 23:14:13,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:14:13,263 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:14:13,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:14:13,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1292373713, now seen corresponding path program 6 times [2021-12-06 23:14:13,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:14:13,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673427826] [2021-12-06 23:14:13,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:14:13,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:14:13,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:14:13,646 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 23:14:13,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:14:13,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673427826] [2021-12-06 23:14:13,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673427826] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:14:13,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044770516] [2021-12-06 23:14:13,647 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 23:14:13,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:14:13,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:14:13,648 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:14:13,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 23:14:13,695 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-06 23:14:13,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:14:13,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 23:14:13,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:14:14,284 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 23:14:14,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:14:14,660 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 23:14:14,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044770516] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:14:14,660 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:14:14,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-06 23:14:14,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328809095] [2021-12-06 23:14:14,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:14:14,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 23:14:14,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:14:14,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 23:14:14,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-06 23:14:14,662 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:14:16,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:14:16,091 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2021-12-06 23:14:16,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 23:14:16,092 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 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 29 [2021-12-06 23:14:16,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:14:16,093 INFO L225 Difference]: With dead ends: 48 [2021-12-06 23:14:16,093 INFO L226 Difference]: Without dead ends: 38 [2021-12-06 23:14:16,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-12-06 23:14:16,094 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 67 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:14:16,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 25 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-06 23:14:16,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-06 23:14:16,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2021-12-06 23:14:16,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:14:16,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2021-12-06 23:14:16,103 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 29 [2021-12-06 23:14:16,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:14:16,103 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2021-12-06 23:14:16,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:14:16,104 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2021-12-06 23:14:16,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-06 23:14:16,105 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:14:16,105 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:14:16,133 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 23:14:16,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 23:14:16,307 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:14:16,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:14:16,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1250534543, now seen corresponding path program 7 times [2021-12-06 23:14:16,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:14:16,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495045125] [2021-12-06 23:14:16,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:14:16,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:14:16,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:14:23,364 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:14:23,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:14:23,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495045125] [2021-12-06 23:14:23,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495045125] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:14:23,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476213424] [2021-12-06 23:14:23,365 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 23:14:23,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:14:23,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:14:23,366 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:14:23,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 23:14:23,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:14:23,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 77 conjunts are in the unsatisfiable core [2021-12-06 23:14:23,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:14:23,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 23:14:23,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 23:14:23,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 23:14:23,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 23:14:23,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 23:14:24,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 27 [2021-12-06 23:14:25,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:25,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 37 [2021-12-06 23:14:27,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:27,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:27,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:27,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 47 [2021-12-06 23:14:28,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:14:28,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:28,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:28,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:28,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 51 [2021-12-06 23:14:29,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:29,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:29,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:29,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:14:29,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:14:29,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 49 [2021-12-06 23:14:30,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 47 [2021-12-06 23:14:30,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 34 [2021-12-06 23:14:30,893 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:14:30,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:14:42,047 INFO L354 Elim1Store]: treesize reduction 476, result has 26.2 percent of original size [2021-12-06 23:14:42,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 6 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 9 new quantified variables, introduced 39 case distinctions, treesize of input 14664 treesize of output 4694 [2021-12-06 23:14:42,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:14:42,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:14:42,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:14:42,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-12-06 23:14:42,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:14:42,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:14:42,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:14:42,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-12-06 23:14:42,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:14:42,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:14:42,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:14:42,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 35 [2021-12-06 23:14:42,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:14:42,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:14:42,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:14:42,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 27 [2021-12-06 23:14:42,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:14:42,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:14:42,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:14:42,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2021-12-06 23:14:42,367 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_5 (Array Int Int)) (~N~0 Int)) (let ((.cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (.cse5 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8))) (or (not (= 2 (select v_arrayElimArr_5 .cse0))) (= (* 2 ~N~0) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_arrayElimArr_5))) (let ((.cse3 (select .cse2 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse1 (select .cse3 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse4 (select (select (store .cse2 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 2))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0))) (+ .cse1 (select (select (store .cse2 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 2 .cse4))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse5) 2 .cse4)))))) (not (= 2 (select v_arrayElimArr_5 |c_ULTIMATE.start_main_~a~0#1.offset|))) (<= ~N~0 |c_ULTIMATE.start_main_~i~0#1|) (< (+ |c_ULTIMATE.start_main_~i~0#1| 1) ~N~0) (not (= (select v_arrayElimArr_5 .cse5) 2))))) is different from false [2021-12-06 23:14:42,567 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_5 (Array Int Int)) (~N~0 Int)) (let ((.cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (.cse5 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8))) (or (not (= 2 (select v_arrayElimArr_5 .cse0))) (= (* 2 ~N~0) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_arrayElimArr_5))) (let ((.cse3 (select .cse2 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse1 (select .cse3 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse4 (select (select (store .cse2 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 2))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0))) (+ .cse1 (select (select (store .cse2 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 2 .cse4))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse5) 2 .cse4)))))) (not (= 2 (select v_arrayElimArr_5 |c_ULTIMATE.start_main_~a~0#1.offset|))) (< (+ 2 |c_ULTIMATE.start_main_~i~0#1|) ~N~0) (not (= (select v_arrayElimArr_5 .cse5) 2)) (<= ~N~0 (+ |c_ULTIMATE.start_main_~i~0#1| 1))))) is different from false [2021-12-06 23:14:42,987 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_5 (Array Int Int)) (~N~0 Int)) (let ((.cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (.cse5 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8))) (or (not (= 2 (select v_arrayElimArr_5 .cse0))) (= (* 2 ~N~0) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_arrayElimArr_5))) (let ((.cse3 (select .cse2 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse1 (select .cse3 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse4 (select (select (store .cse2 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 2))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0))) (+ .cse1 (select (select (store .cse2 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 2 .cse4))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse5) 2 .cse4)))))) (not (= 2 (select v_arrayElimArr_5 |c_ULTIMATE.start_main_~a~0#1.offset|))) (<= ~N~0 (+ 2 |c_ULTIMATE.start_main_~i~0#1|)) (< (+ 3 |c_ULTIMATE.start_main_~i~0#1|) ~N~0) (not (= (select v_arrayElimArr_5 .cse5) 2))))) is different from false [2021-12-06 23:14:43,198 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 9 not checked. [2021-12-06 23:14:43,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476213424] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:14:43,198 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:14:43,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24, 24] total 63 [2021-12-06 23:14:43,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758020282] [2021-12-06 23:14:43,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:14:43,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-12-06 23:14:43,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:14:43,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-12-06 23:14:43,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=3099, Unknown=3, NotChecked=354, Total=3906 [2021-12-06 23:14:43,200 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 63 states, 63 states have (on average 1.3174603174603174) internal successors, (83), 63 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:15:05,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:15:05,967 INFO L93 Difference]: Finished difference Result 83 states and 94 transitions. [2021-12-06 23:15:05,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-06 23:15:05,968 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.3174603174603174) internal successors, (83), 63 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-06 23:15:05,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:15:05,969 INFO L225 Difference]: With dead ends: 83 [2021-12-06 23:15:05,969 INFO L226 Difference]: Without dead ends: 69 [2021-12-06 23:15:05,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 28 SyntacticMatches, 8 SemanticMatches, 75 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1657 ImplicationChecksByTransitivity, 35.1s TimeCoverageRelationStatistics Valid=743, Invalid=4668, Unknown=3, NotChecked=438, Total=5852 [2021-12-06 23:15:05,972 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 37 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 1085 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 1497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 1085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 199 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:15:05,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 145 Invalid, 1497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 1085 Invalid, 0 Unknown, 199 Unchecked, 7.2s Time] [2021-12-06 23:15:05,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-06 23:15:05,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 54. [2021-12-06 23:15:05,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.150943396226415) internal successors, (61), 53 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:15:05,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2021-12-06 23:15:05,983 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 34 [2021-12-06 23:15:05,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:15:05,984 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2021-12-06 23:15:05,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.3174603174603174) internal successors, (83), 63 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:15:05,984 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2021-12-06 23:15:05,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-06 23:15:05,985 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:15:05,986 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:15:06,011 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 23:15:06,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-06 23:15:06,188 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:15:06,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:15:06,189 INFO L85 PathProgramCache]: Analyzing trace with hash 2033315503, now seen corresponding path program 2 times [2021-12-06 23:15:06,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:15:06,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743868410] [2021-12-06 23:15:06,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:15:06,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:15:06,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:15:06,919 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 23:15:06,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:15:06,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743868410] [2021-12-06 23:15:06,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743868410] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:15:06,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172297156] [2021-12-06 23:15:06,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:15:06,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:15:06,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:15:06,921 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:15:06,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 23:15:06,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:15:06,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:15:06,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-06 23:15:06,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:15:07,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 23:15:07,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:15:07,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 23:15:08,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:15:08,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 23:15:08,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 23:15:08,304 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 23:15:08,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:15:08,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-06 23:15:08,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-06 23:15:09,100 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 23:15:09,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172297156] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:15:09,100 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:15:09,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 19 [2021-12-06 23:15:09,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819070150] [2021-12-06 23:15:09,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:15:09,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 23:15:09,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:15:09,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 23:15:09,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-12-06 23:15:09,101 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:15:11,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:15:11,055 INFO L93 Difference]: Finished difference Result 77 states and 87 transitions. [2021-12-06 23:15:11,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 23:15:11,056 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-06 23:15:11,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:15:11,057 INFO L225 Difference]: With dead ends: 77 [2021-12-06 23:15:11,057 INFO L226 Difference]: Without dead ends: 62 [2021-12-06 23:15:11,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 58 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-12-06 23:15:11,058 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 14 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 23:15:11,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 82 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-06 23:15:11,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-06 23:15:11,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2021-12-06 23:15:11,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 54 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:15:11,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2021-12-06 23:15:11,067 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 34 [2021-12-06 23:15:11,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:15:11,067 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2021-12-06 23:15:11,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:15:11,067 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2021-12-06 23:15:11,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-06 23:15:11,068 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:15:11,068 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:15:11,093 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 23:15:11,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:15:11,270 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:15:11,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:15:11,271 INFO L85 PathProgramCache]: Analyzing trace with hash 880380819, now seen corresponding path program 8 times [2021-12-06 23:15:11,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:15:11,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329322433] [2021-12-06 23:15:11,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:15:11,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:15:11,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:15:11,855 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 23:15:11,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:15:11,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329322433] [2021-12-06 23:15:11,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329322433] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:15:11,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128971286] [2021-12-06 23:15:11,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:15:11,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:15:11,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:15:11,856 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:15:11,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 23:15:11,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:15:11,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:15:11,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 23:15:11,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:15:12,765 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 23:15:12,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:15:13,113 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 23:15:13,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128971286] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:15:13,114 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:15:13,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-06 23:15:13,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769775010] [2021-12-06 23:15:13,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:15:13,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 23:15:13,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:15:13,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 23:15:13,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-12-06 23:15:13,115 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:15:14,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:15:14,360 INFO L93 Difference]: Finished difference Result 99 states and 109 transitions. [2021-12-06 23:15:14,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 23:15:14,361 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 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 36 [2021-12-06 23:15:14,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:15:14,362 INFO L225 Difference]: With dead ends: 99 [2021-12-06 23:15:14,362 INFO L226 Difference]: Without dead ends: 62 [2021-12-06 23:15:14,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-12-06 23:15:14,364 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 94 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 23:15:14,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 34 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 23:15:14,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-06 23:15:14,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 48. [2021-12-06 23:15:14,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 47 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:15:14,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2021-12-06 23:15:14,371 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 36 [2021-12-06 23:15:14,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:15:14,372 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2021-12-06 23:15:14,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:15:14,372 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2021-12-06 23:15:14,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-06 23:15:14,372 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:15:14,373 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:15:14,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 23:15:14,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:15:14,574 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:15:14,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:15:14,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1466624367, now seen corresponding path program 9 times [2021-12-06 23:15:14,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:15:14,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96506668] [2021-12-06 23:15:14,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:15:14,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:15:14,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:15:15,145 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 23:15:15,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:15:15,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96506668] [2021-12-06 23:15:15,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96506668] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:15:15,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907335260] [2021-12-06 23:15:15,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 23:15:15,146 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:15:15,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:15:15,146 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:15:15,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 23:15:15,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-06 23:15:15,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:15:15,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 23:15:15,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:15:16,078 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 23:15:16,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:15:16,485 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 23:15:16,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907335260] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:15:16,485 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:15:16,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-06 23:15:16,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756295736] [2021-12-06 23:15:16,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:15:16,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 23:15:16,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:15:16,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 23:15:16,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-12-06 23:15:16,486 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:15:18,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:15:18,101 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2021-12-06 23:15:18,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 23:15:18,102 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 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 36 [2021-12-06 23:15:18,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:15:18,102 INFO L225 Difference]: With dead ends: 57 [2021-12-06 23:15:18,102 INFO L226 Difference]: Without dead ends: 45 [2021-12-06 23:15:18,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-12-06 23:15:18,103 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 73 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:15:18,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 33 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-06 23:15:18,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-06 23:15:18,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2021-12-06 23:15:18,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:15:18,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-12-06 23:15:18,111 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 36 [2021-12-06 23:15:18,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:15:18,112 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-12-06 23:15:18,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:15:18,112 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-12-06 23:15:18,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 23:15:18,112 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:15:18,112 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:15:18,137 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 23:15:18,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:15:18,314 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:15:18,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:15:18,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1118330549, now seen corresponding path program 10 times [2021-12-06 23:15:18,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:15:18,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049209979] [2021-12-06 23:15:18,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:15:18,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:15:18,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:15:27,115 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:15:27,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:15:27,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049209979] [2021-12-06 23:15:27,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049209979] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:15:27,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179041810] [2021-12-06 23:15:27,116 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 23:15:27,116 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:15:27,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:15:27,117 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:15:27,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 23:15:27,171 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 23:15:27,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:15:27,173 WARN L261 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 92 conjunts are in the unsatisfiable core [2021-12-06 23:15:27,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:15:27,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 23:15:27,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:15:27,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 23:15:27,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:15:27,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 23:15:28,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:15:28,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 23:15:28,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:15:28,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 23:15:30,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:15:30,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 27 [2021-12-06 23:15:31,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:15:31,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:15:31,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 42 [2021-12-06 23:15:33,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:15:33,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:15:33,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:15:33,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:15:33,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 49 [2021-12-06 23:15:34,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:15:34,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:15:34,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:15:34,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:15:34,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:15:34,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:15:34,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:15:34,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 59 [2021-12-06 23:15:35,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:15:35,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:15:35,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:15:35,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:15:35,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:15:35,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:15:35,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:15:35,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:15:35,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 63 [2021-12-06 23:15:36,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:15:36,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:15:36,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:15:36,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:15:36,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:15:36,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:15:36,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:15:36,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:15:36,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:15:36,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 61 [2021-12-06 23:15:38,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:15:38,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:15:38,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:15:38,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:15:38,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:15:38,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:15:38,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:15:38,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:15:38,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:15:38,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 61 [2021-12-06 23:15:39,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:15:39,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 55 [2021-12-06 23:15:40,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:15:40,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 38 [2021-12-06 23:15:40,439 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:15:40,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:16:08,704 WARN L227 SmtUtils]: Spent 6.94s on a formula simplification. DAG size of input: 793 DAG size of output: 324 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-12-06 23:16:08,705 INFO L354 Elim1Store]: treesize reduction 3907, result has 18.3 percent of original size [2021-12-06 23:16:08,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 23 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 27 new quantified variables, introduced 190 case distinctions, treesize of input 2224890 treesize of output 511328 [2021-12-06 23:16:12,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 31 [2021-12-06 23:16:12,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 31 [2021-12-06 23:16:12,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 31 [2021-12-06 23:16:12,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 31 [2021-12-06 23:16:12,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 31 [2021-12-06 23:16:12,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 2149 treesize of output 2039 [2021-12-06 23:16:12,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 695 treesize of output 587 [2021-12-06 23:16:12,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 37 [2021-12-06 23:16:12,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2021-12-06 23:16:12,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 39 [2021-12-06 23:16:12,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:12,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 39 [2021-12-06 23:16:13,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:13,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:13,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:13,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:13,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:13,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:13,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 59 [2021-12-06 23:16:13,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:13,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:13,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:13,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:13,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:13,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:13,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 243 treesize of output 161 [2021-12-06 23:16:14,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:14,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:14,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:14,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:14,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:14,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:14,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 37 [2021-12-06 23:16:14,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:14,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:14,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:14,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:14,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:14,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:14,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 51 [2021-12-06 23:16:14,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:14,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:14,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:14,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:14,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:14,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:14,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 47 [2021-12-06 23:16:14,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:14,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:14,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:14,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:14,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:14,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:14,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 41 [2021-12-06 23:16:14,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:14,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:14,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:14,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:14,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:14,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:14,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 37 [2021-12-06 23:16:14,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:14,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:14,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:14,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:14,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:14,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:14,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2021-12-06 23:16:14,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:14,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:14,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:14,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:14,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:14,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:14,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 361 treesize of output 295 [2021-12-06 23:16:14,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:14,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:14,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:14,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:14,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:14,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:14,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 39 [2021-12-06 23:16:14,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:14,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:14,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:14,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:14,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:14,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:16:14,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 335 treesize of output 273 [2021-12-06 23:16:14,845 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_26 (Array Int Int)) (~N~0 Int)) (let ((.cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 12)) (.cse2 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8)) (.cse1 (select v_arrayElimArr_26 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse3 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (or (not (= 2 (select v_arrayElimArr_26 .cse0))) (not (= 2 .cse1)) (not (= 2 (select v_arrayElimArr_26 .cse2))) (not (= 2 (select v_arrayElimArr_26 .cse3))) (= (* 2 ~N~0) (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_arrayElimArr_26))) (let ((.cse6 (select .cse5 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse8 (select .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse4 (select (select (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 .cse8))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse3))) (let ((.cse7 (select (select (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse4 .cse1 .cse8))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse2))) (+ .cse4 .cse1 (select (select (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse4 .cse1 .cse7 .cse8))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0) .cse7 .cse8))))))) (<= ~N~0 |c_ULTIMATE.start_main_~i~0#1|) (< (+ |c_ULTIMATE.start_main_~i~0#1| 1) ~N~0)))) is different from false [2021-12-06 23:16:15,161 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_26 (Array Int Int)) (~N~0 Int)) (let ((.cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 12)) (.cse2 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8)) (.cse1 (select v_arrayElimArr_26 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse3 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (or (not (= 2 (select v_arrayElimArr_26 .cse0))) (not (= 2 .cse1)) (not (= 2 (select v_arrayElimArr_26 .cse2))) (< (+ 2 |c_ULTIMATE.start_main_~i~0#1|) ~N~0) (not (= 2 (select v_arrayElimArr_26 .cse3))) (= (* 2 ~N~0) (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_arrayElimArr_26))) (let ((.cse6 (select .cse5 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse8 (select .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse4 (select (select (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 .cse8))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse3))) (let ((.cse7 (select (select (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse4 .cse1 .cse8))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse2))) (+ .cse4 .cse1 (select (select (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse4 .cse1 .cse7 .cse8))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0) .cse7 .cse8))))))) (<= ~N~0 (+ |c_ULTIMATE.start_main_~i~0#1| 1))))) is different from false [2021-12-06 23:16:15,734 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_26 (Array Int Int)) (~N~0 Int)) (let ((.cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 12)) (.cse2 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8)) (.cse1 (select v_arrayElimArr_26 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse3 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (or (not (= 2 (select v_arrayElimArr_26 .cse0))) (not (= 2 .cse1)) (not (= 2 (select v_arrayElimArr_26 .cse2))) (<= ~N~0 (+ 2 |c_ULTIMATE.start_main_~i~0#1|)) (not (= 2 (select v_arrayElimArr_26 .cse3))) (= (* 2 ~N~0) (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_arrayElimArr_26))) (let ((.cse6 (select .cse5 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse8 (select .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse4 (select (select (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 .cse8))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse3))) (let ((.cse7 (select (select (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse4 .cse1 .cse8))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse2))) (+ .cse4 .cse1 (select (select (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse4 .cse1 .cse7 .cse8))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0) .cse7 .cse8))))))) (< (+ 3 |c_ULTIMATE.start_main_~i~0#1|) ~N~0)))) is different from false [2021-12-06 23:16:16,338 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_26 (Array Int Int)) (~N~0 Int)) (let ((.cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 12)) (.cse2 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8)) (.cse1 (select v_arrayElimArr_26 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse3 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (or (<= ~N~0 (+ 3 |c_ULTIMATE.start_main_~i~0#1|)) (not (= 2 (select v_arrayElimArr_26 .cse0))) (not (= 2 .cse1)) (not (= 2 (select v_arrayElimArr_26 .cse2))) (not (= 2 (select v_arrayElimArr_26 .cse3))) (< (+ |c_ULTIMATE.start_main_~i~0#1| 4) ~N~0) (= (* 2 ~N~0) (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_arrayElimArr_26))) (let ((.cse6 (select .cse5 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse8 (select .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse4 (select (select (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 .cse8))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse3))) (let ((.cse7 (select (select (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse4 .cse1 .cse8))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse2))) (+ .cse4 .cse1 (select (select (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse4 .cse1 .cse7 .cse8))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0) .cse7 .cse8)))))))))) is different from false [2021-12-06 23:16:16,657 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 16 not checked. [2021-12-06 23:16:16,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179041810] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:16:16,657 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:16:16,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 85 [2021-12-06 23:16:16,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954680913] [2021-12-06 23:16:16,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:16:16,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-12-06 23:16:16,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:16:16,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-12-06 23:16:16,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=758, Invalid=5734, Unknown=4, NotChecked=644, Total=7140 [2021-12-06 23:16:16,660 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 85 states, 85 states have (on average 1.3176470588235294) internal successors, (112), 85 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:17:33,838 WARN L227 SmtUtils]: Spent 13.64s on a formula simplification. DAG size of input: 222 DAG size of output: 179 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 23:17:41,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:17:41,713 INFO L93 Difference]: Finished difference Result 114 states and 130 transitions. [2021-12-06 23:17:41,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-12-06 23:17:41,716 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.3176470588235294) internal successors, (112), 85 states have internal predecessors, (112), 0 states have call successors, (0), 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 41 [2021-12-06 23:17:41,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:17:41,717 INFO L225 Difference]: With dead ends: 114 [2021-12-06 23:17:41,717 INFO L226 Difference]: Without dead ends: 94 [2021-12-06 23:17:41,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 124 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 5401 ImplicationChecksByTransitivity, 109.2s TimeCoverageRelationStatistics Valid=1715, Invalid=13059, Unknown=4, NotChecked=972, Total=15750 [2021-12-06 23:17:41,723 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 90 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 1389 mSolverCounterSat, 406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 2059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 1389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 264 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2021-12-06 23:17:41,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 141 Invalid, 2059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 1389 Invalid, 0 Unknown, 264 Unchecked, 10.7s Time] [2021-12-06 23:17:41,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-06 23:17:41,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 65. [2021-12-06 23:17:41,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.140625) internal successors, (73), 64 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:17:41,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2021-12-06 23:17:41,732 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 41 [2021-12-06 23:17:41,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:17:41,732 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2021-12-06 23:17:41,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.3176470588235294) internal successors, (112), 85 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:17:41,733 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2021-12-06 23:17:41,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 23:17:41,733 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:17:41,733 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:17:41,752 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 23:17:41,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 23:17:41,935 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:17:41,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:17:41,936 INFO L85 PathProgramCache]: Analyzing trace with hash 97262195, now seen corresponding path program 3 times [2021-12-06 23:17:41,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:17:41,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773996338] [2021-12-06 23:17:41,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:17:41,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:17:41,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:17:44,214 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 23:17:44,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:17:44,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773996338] [2021-12-06 23:17:44,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773996338] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:17:44,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391435234] [2021-12-06 23:17:44,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 23:17:44,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:17:44,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:17:44,216 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:17:44,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 23:17:44,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-06 23:17:44,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:17:44,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-06 23:17:44,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:17:44,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 23:17:51,687 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-06 23:17:51,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-12-06 23:17:52,121 INFO L354 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2021-12-06 23:17:52,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 34 [2021-12-06 23:17:52,798 INFO L354 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2021-12-06 23:17:52,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 38 [2021-12-06 23:17:53,730 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:17:53,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 32 treesize of output 32 [2021-12-06 23:17:56,166 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 21 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 23:17:56,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:19:12,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2021-12-06 23:19:12,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 198 [2021-12-06 23:19:12,113 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 23 proven. 20 refuted. 2 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 23:19:12,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391435234] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:19:12,113 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:19:12,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 21, 17] total 49 [2021-12-06 23:19:12,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454294635] [2021-12-06 23:19:12,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:19:12,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-06 23:19:12,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:19:12,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-06 23:19:12,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=445, Invalid=1885, Unknown=22, NotChecked=0, Total=2352 [2021-12-06 23:19:12,115 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand has 49 states, 49 states have (on average 1.9183673469387754) internal successors, (94), 49 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:19:17,572 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (<= 4 c_~N~0) (exists ((|v_ULTIMATE.start_main_~i~0#1_202| Int)) (and (< |v_ULTIMATE.start_main_~i~0#1_202| c_~N~0) (<= c_~N~0 (+ |v_ULTIMATE.start_main_~i~0#1_202| 1)) (or (<= |v_ULTIMATE.start_main_~i~0#1_202| 1) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_202| 4))) 1)))) (or (<= c_~N~0 3) (forall ((v_ArrVal_698 Int) (v_ArrVal_697 Int) (|v_ULTIMATE.start_main_~i~0#1_215| Int) (|v_ULTIMATE.start_main_~i~0#1_217| Int) (|v_ULTIMATE.start_main_~i~0#1_218| Int)) (or (= (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_218| 4)) v_ArrVal_697) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_217| 4)) v_ArrVal_698) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_215| 4))) 1) (<= c_~N~0 |v_ULTIMATE.start_main_~i~0#1_215|) (< |v_ULTIMATE.start_main_~i~0#1_215| (+ |v_ULTIMATE.start_main_~i~0#1_217| 1)) (< (+ |v_ULTIMATE.start_main_~i~0#1_215| 1) c_~N~0) (< (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_218|)))) (< 1 c_~N~0) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) 12) 1) (<= |c_ULTIMATE.start_main_~i~0#1| 1)) is different from false [2021-12-06 23:19:19,586 WARN L838 $PredicateComparison]: unable to prove that (and (or (forall ((v_ArrVal_698 Int) (v_ArrVal_697 Int) (|v_ULTIMATE.start_main_~i~0#1_215| Int) (|v_ULTIMATE.start_main_~i~0#1_217| Int)) (or (<= c_~N~0 |v_ULTIMATE.start_main_~i~0#1_215|) (< |v_ULTIMATE.start_main_~i~0#1_215| (+ |v_ULTIMATE.start_main_~i~0#1_217| 1)) (= (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)) v_ArrVal_697) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_217| 4)) v_ArrVal_698) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_215| 4))) 1) (< (+ |v_ULTIMATE.start_main_~i~0#1_215| 1) c_~N~0))) (<= c_~N~0 3)) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (<= 4 c_~N~0) (<= |c_ULTIMATE.start_main_~i~0#1| 2) (exists ((|v_ULTIMATE.start_main_~i~0#1_202| Int)) (and (< |v_ULTIMATE.start_main_~i~0#1_202| c_~N~0) (<= c_~N~0 (+ |v_ULTIMATE.start_main_~i~0#1_202| 1)) (or (<= |v_ULTIMATE.start_main_~i~0#1_202| 1) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_202| 4))) 1)))) (< 1 c_~N~0) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) 12) 1)) is different from false [2021-12-06 23:19:26,122 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (<= 4 c_~N~0) (<= |c_ULTIMATE.start_main_~i~0#1| 2) (exists ((|v_ULTIMATE.start_main_~i~0#1_202| Int)) (and (or (<= |v_ULTIMATE.start_main_~i~0#1_202| 1) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_202| 4))) 1) (= (* 4 |v_ULTIMATE.start_main_~i~0#1_202|) (* 4 |c_ULTIMATE.start_main_~i~0#1|))) (< |v_ULTIMATE.start_main_~i~0#1_202| c_~N~0) (<= c_~N~0 (+ |v_ULTIMATE.start_main_~i~0#1_202| 1)))) (or (forall ((v_ArrVal_698 Int) (|ULTIMATE.start_main_~i~0#1| Int) (|v_ULTIMATE.start_main_~i~0#1_215| Int)) (or (<= c_~N~0 |v_ULTIMATE.start_main_~i~0#1_215|) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)) v_ArrVal_698) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_215| 4))) 1) (< (+ |v_ULTIMATE.start_main_~i~0#1_215| 1) c_~N~0) (< |v_ULTIMATE.start_main_~i~0#1_215| (+ |ULTIMATE.start_main_~i~0#1| 1)))) (<= c_~N~0 3)) (< 1 c_~N~0) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) 12) 1)) is different from false [2021-12-06 23:19:42,796 WARN L227 SmtUtils]: Spent 10.19s on a formula simplification that was a NOOP. DAG size: 48 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 23:20:30,151 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (= |c_ULTIMATE.start_main_#t~mem8#1| 1)) (.cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* 4 |c_ULTIMATE.start_main_~i~0#1|)))) (and (or .cse0 (<= c_~N~0 2) (< (+ |c_ULTIMATE.start_main_~i~0#1| 1) c_~N~0)) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (<= |c_ULTIMATE.start_main_~i~0#1| 3) (or (not (= .cse1 12)) .cse0) (< |c_ULTIMATE.start_main_~i~0#1| c_~N~0) (or (forall ((v_ArrVal_698 Int) (|ULTIMATE.start_main_~i~0#1| Int) (|v_ULTIMATE.start_main_~i~0#1_215| Int)) (or (<= c_~N~0 |v_ULTIMATE.start_main_~i~0#1_215|) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)) v_ArrVal_698) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_215| 4))) 1) (< (+ |v_ULTIMATE.start_main_~i~0#1_215| 1) c_~N~0) (< |v_ULTIMATE.start_main_~i~0#1_215| (+ |ULTIMATE.start_main_~i~0#1| 1)))) (<= c_~N~0 3)) (< 1 c_~N~0) (or (<= 4 c_~N~0) (< 11 .cse1)))) is different from false [2021-12-06 23:21:14,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:21:14,178 INFO L93 Difference]: Finished difference Result 103 states and 115 transitions. [2021-12-06 23:21:14,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-06 23:21:14,179 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.9183673469387754) internal successors, (94), 49 states have internal predecessors, (94), 0 states have call successors, (0), 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 41 [2021-12-06 23:21:14,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:21:14,180 INFO L225 Difference]: With dead ends: 103 [2021-12-06 23:21:14,180 INFO L226 Difference]: Without dead ends: 75 [2021-12-06 23:21:14,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 84 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 2284 ImplicationChecksByTransitivity, 204.9s TimeCoverageRelationStatistics Valid=1183, Invalid=5412, Unknown=63, NotChecked=652, Total=7310 [2021-12-06 23:21:14,188 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 52 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 23:21:14,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 44 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 285 Invalid, 0 Unknown, 125 Unchecked, 1.6s Time] [2021-12-06 23:21:14,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-06 23:21:14,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 68. [2021-12-06 23:21:14,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.1492537313432836) internal successors, (77), 67 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:21:14,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2021-12-06 23:21:14,198 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 41 [2021-12-06 23:21:14,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:21:14,198 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2021-12-06 23:21:14,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.9183673469387754) internal successors, (94), 49 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:21:14,198 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2021-12-06 23:21:14,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-06 23:21:14,199 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:21:14,199 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:21:14,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-06 23:21:14,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 23:21:14,401 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:21:14,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:21:14,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1027067351, now seen corresponding path program 11 times [2021-12-06 23:21:14,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:21:14,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936846030] [2021-12-06 23:21:14,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:21:14,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:21:14,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:21:15,086 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-06 23:21:15,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:21:15,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936846030] [2021-12-06 23:21:15,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936846030] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:21:15,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573161845] [2021-12-06 23:21:15,087 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 23:21:15,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:21:15,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:21:15,088 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:21:15,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 23:21:15,253 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-06 23:21:15,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:21:15,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 23:21:15,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:21:16,460 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-06 23:21:16,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:21:16,943 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-06 23:21:16,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573161845] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:21:16,943 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:21:16,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2021-12-06 23:21:16,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680925550] [2021-12-06 23:21:16,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:21:16,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 23:21:16,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:21:16,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 23:21:16,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-12-06 23:21:16,945 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:21:18,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:21:18,637 INFO L93 Difference]: Finished difference Result 109 states and 121 transitions. [2021-12-06 23:21:18,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 23:21:18,638 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 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 43 [2021-12-06 23:21:18,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:21:18,639 INFO L225 Difference]: With dead ends: 109 [2021-12-06 23:21:18,639 INFO L226 Difference]: Without dead ends: 62 [2021-12-06 23:21:18,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-12-06 23:21:18,640 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 119 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 23:21:18,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 43 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-06 23:21:18,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-06 23:21:18,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 50. [2021-12-06 23:21:18,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:21:18,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2021-12-06 23:21:18,647 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 43 [2021-12-06 23:21:18,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:21:18,648 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2021-12-06 23:21:18,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:21:18,648 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2021-12-06 23:21:18,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-06 23:21:18,648 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:21:18,648 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:21:18,673 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 23:21:18,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 23:21:18,850 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:21:18,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:21:18,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1824213007, now seen corresponding path program 12 times [2021-12-06 23:21:18,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:21:18,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046995283] [2021-12-06 23:21:18,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:21:18,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:21:18,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:21:19,668 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-06 23:21:19,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:21:19,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046995283] [2021-12-06 23:21:19,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046995283] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:21:19,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703146980] [2021-12-06 23:21:19,669 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 23:21:19,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:21:19,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:21:19,670 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:21:19,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 23:21:19,779 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-06 23:21:19,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:21:19,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 23:21:19,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:21:20,872 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 22 proven. 29 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-06 23:21:20,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:21:21,392 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 22 proven. 29 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-06 23:21:21,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703146980] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:21:21,392 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:21:21,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2021-12-06 23:21:21,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209585498] [2021-12-06 23:21:21,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:21:21,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 23:21:21,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:21:21,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 23:21:21,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-12-06 23:21:21,394 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:21:23,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:21:23,698 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2021-12-06 23:21:23,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 23:21:23,698 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 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 46 [2021-12-06 23:21:23,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:21:23,699 INFO L225 Difference]: With dead ends: 61 [2021-12-06 23:21:23,699 INFO L226 Difference]: Without dead ends: 57 [2021-12-06 23:21:23,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=206, Invalid=664, Unknown=0, NotChecked=0, Total=870 [2021-12-06 23:21:23,700 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 98 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-06 23:21:23,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 30 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-06 23:21:23,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-06 23:21:23,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2021-12-06 23:21:23,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 51 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:21:23,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2021-12-06 23:21:23,708 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 46 [2021-12-06 23:21:23,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:21:23,708 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2021-12-06 23:21:23,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:21:23,709 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2021-12-06 23:21:23,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-06 23:21:23,709 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:21:23,709 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:21:23,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-06 23:21:23,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 23:21:23,911 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:21:23,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:21:23,912 INFO L85 PathProgramCache]: Analyzing trace with hash 775276721, now seen corresponding path program 13 times [2021-12-06 23:21:23,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:21:23,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212557206] [2021-12-06 23:21:23,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:21:23,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:21:23,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:21:36,861 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:21:36,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:21:36,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212557206] [2021-12-06 23:21:36,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212557206] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:21:36,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239310290] [2021-12-06 23:21:36,862 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 23:21:36,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:21:36,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:21:36,863 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:21:36,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e411649-f6e2-45a2-8390-73b58553e6cd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 23:21:36,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:21:36,930 WARN L261 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 113 conjunts are in the unsatisfiable core [2021-12-06 23:21:36,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:21:36,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 23:21:36,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 23:21:37,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 23:21:37,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 23:21:37,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 23:21:37,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 23:21:37,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 23:21:38,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 27 [2021-12-06 23:21:39,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:39,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 42 [2021-12-06 23:21:40,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:40,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:40,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:40,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 57 [2021-12-06 23:21:42,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:42,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:42,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:42,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:42,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:42,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:42,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 61 [2021-12-06 23:21:44,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:44,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:44,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:44,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:44,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:44,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:44,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:44,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:44,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:44,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:44,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 71 [2021-12-06 23:21:45,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:21:45,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:45,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:45,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:45,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:45,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:45,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:45,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:45,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:45,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:45,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:45,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 75 [2021-12-06 23:21:46,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:46,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:21:46,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:46,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:46,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:46,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:46,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:46,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:46,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:46,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:46,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:46,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 78 [2021-12-06 23:21:47,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:47,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:47,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:47,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:47,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:47,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:47,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:47,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:47,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:21:47,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:47,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:47,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:47,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 83 [2021-12-06 23:21:49,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:49,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:49,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:49,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:49,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:49,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:49,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:49,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:49,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:49,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:49,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:21:49,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:49,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:21:49,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 75 [2021-12-06 23:21:50,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 65 [2021-12-06 23:21:51,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 37 [2021-12-06 23:21:51,869 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:21:51,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:24:17,291 WARN L227 SmtUtils]: Spent 1.61m on a formula simplification. DAG size of input: 4992 DAG size of output: 1730 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-12-06 23:24:17,296 INFO L354 Elim1Store]: treesize reduction 32760, result has 13.4 percent of original size [2021-12-06 23:24:17,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 106 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 111 new quantified variables, introduced 1070 case distinctions, treesize of input 523116372 treesize of output 94432044 [2021-12-06 23:24:59,826 WARN L227 SmtUtils]: Spent 42.49s on a formula simplification that was a NOOP. DAG size: 20650 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 23:25:43,105 WARN L227 SmtUtils]: Spent 42.71s on a formula simplification that was a NOOP. DAG size: 20636 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)