./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0 --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 30672bd579b7f25ffa685cb80d8a419cb542781c19afe0226ba5d9d3cf26984c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 16:03:25,848 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 16:03:25,852 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 16:03:25,923 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 16:03:25,924 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 16:03:25,930 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 16:03:25,933 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 16:03:25,938 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 16:03:25,942 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 16:03:25,952 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 16:03:25,954 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 16:03:25,956 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 16:03:25,957 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 16:03:25,960 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 16:03:25,963 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 16:03:25,971 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 16:03:25,973 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 16:03:25,974 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 16:03:25,977 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 16:03:25,987 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 16:03:25,990 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 16:03:25,991 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 16:03:25,996 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 16:03:25,998 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 16:03:26,003 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 16:03:26,004 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 16:03:26,004 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 16:03:26,007 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 16:03:26,008 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 16:03:26,010 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 16:03:26,010 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 16:03:26,012 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 16:03:26,015 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 16:03:26,016 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 16:03:26,018 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 16:03:26,019 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 16:03:26,020 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 16:03:26,020 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 16:03:26,021 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 16:03:26,022 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 16:03:26,023 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 16:03:26,024 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-22 16:03:26,077 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 16:03:26,077 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 16:03:26,078 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 16:03:26,078 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 16:03:26,088 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 16:03:26,089 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 16:03:26,089 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 16:03:26,090 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 16:03:26,090 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 16:03:26,090 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 16:03:26,092 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 16:03:26,092 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 16:03:26,093 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 16:03:26,093 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 16:03:26,093 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 16:03:26,094 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 16:03:26,094 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 16:03:26,094 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 16:03:26,094 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 16:03:26,095 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 16:03:26,095 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 16:03:26,095 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 16:03:26,096 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 16:03:26,096 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 16:03:26,096 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 16:03:26,097 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 16:03:26,097 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 16:03:26,097 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 16:03:26,098 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 16:03:26,100 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 16:03:26,100 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 16:03:26,100 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 16:03:26,101 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_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 30672bd579b7f25ffa685cb80d8a419cb542781c19afe0226ba5d9d3cf26984c [2021-11-22 16:03:26,401 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 16:03:26,435 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 16:03:26,438 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 16:03:26,440 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 16:03:26,441 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 16:03:26,443 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.c [2021-11-22 16:03:26,559 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/data/473cf51e7/563374a3f3864f90a7ef035bb7e0af22/FLAG91f6c3854 [2021-11-22 16:03:27,159 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 16:03:27,160 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.c [2021-11-22 16:03:27,169 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/data/473cf51e7/563374a3f3864f90a7ef035bb7e0af22/FLAG91f6c3854 [2021-11-22 16:03:27,499 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/data/473cf51e7/563374a3f3864f90a7ef035bb7e0af22 [2021-11-22 16:03:27,503 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 16:03:27,505 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 16:03:27,507 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 16:03:27,507 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 16:03:27,511 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 16:03:27,512 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 04:03:27" (1/1) ... [2021-11-22 16:03:27,514 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a5dfbb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:03:27, skipping insertion in model container [2021-11-22 16:03:27,514 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 04:03:27" (1/1) ... [2021-11-22 16:03:27,522 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 16:03:27,542 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 16:03:27,722 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_ad35c766-e44c-4125-884d-75fe41c12c65/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.c[490,503] [2021-11-22 16:03:27,782 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 16:03:27,791 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 16:03:27,803 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_ad35c766-e44c-4125-884d-75fe41c12c65/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.c[490,503] [2021-11-22 16:03:27,815 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 16:03:27,830 INFO L208 MainTranslator]: Completed translation [2021-11-22 16:03:27,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:03:27 WrapperNode [2021-11-22 16:03:27,831 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 16:03:27,832 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 16:03:27,832 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 16:03:27,833 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 16:03:27,842 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:03:27" (1/1) ... [2021-11-22 16:03:27,850 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:03:27" (1/1) ... [2021-11-22 16:03:27,880 INFO L137 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 126 [2021-11-22 16:03:27,881 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 16:03:27,882 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 16:03:27,882 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 16:03:27,883 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 16:03:27,893 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:03:27" (1/1) ... [2021-11-22 16:03:27,893 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:03:27" (1/1) ... [2021-11-22 16:03:27,896 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:03:27" (1/1) ... [2021-11-22 16:03:27,896 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:03:27" (1/1) ... [2021-11-22 16:03:27,903 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:03:27" (1/1) ... [2021-11-22 16:03:27,910 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:03:27" (1/1) ... [2021-11-22 16:03:27,912 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:03:27" (1/1) ... [2021-11-22 16:03:27,915 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 16:03:27,916 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 16:03:27,917 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 16:03:27,917 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 16:03:27,918 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:03:27" (1/1) ... [2021-11-22 16:03:27,932 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 16:03:27,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:03:27,978 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 16:03:27,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 16:03:28,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 16:03:28,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 16:03:28,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 16:03:28,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 16:03:28,103 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 16:03:28,105 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 16:03:28,296 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 16:03:28,303 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 16:03:28,304 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-22 16:03:28,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 04:03:28 BoogieIcfgContainer [2021-11-22 16:03:28,306 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 16:03:28,308 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 16:03:28,308 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 16:03:28,312 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 16:03:28,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 04:03:27" (1/3) ... [2021-11-22 16:03:28,314 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@480559cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 04:03:28, skipping insertion in model container [2021-11-22 16:03:28,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:03:27" (2/3) ... [2021-11-22 16:03:28,314 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@480559cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 04:03:28, skipping insertion in model container [2021-11-22 16:03:28,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 04:03:28" (3/3) ... [2021-11-22 16:03:28,316 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound100.c [2021-11-22 16:03:28,322 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 16:03:28,323 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-22 16:03:28,382 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 16:03:28,392 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-22 16:03:28,392 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-22 16:03:28,413 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 38 states have (on average 1.5789473684210527) internal successors, (60), 44 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:28,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-22 16:03:28,421 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:28,422 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:03:28,422 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 16:03:28,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:28,443 INFO L85 PathProgramCache]: Analyzing trace with hash -172337993, now seen corresponding path program 1 times [2021-11-22 16:03:28,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:28,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894243796] [2021-11-22 16:03:28,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:28,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:28,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:28,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:28,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:28,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894243796] [2021-11-22 16:03:28,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894243796] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:03:28,710 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:03:28,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 16:03:28,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490090928] [2021-11-22 16:03:28,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:03:28,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-22 16:03:28,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:28,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-22 16:03:28,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 16:03:28,777 INFO L87 Difference]: Start difference. First operand has 45 states, 38 states have (on average 1.5789473684210527) internal successors, (60), 44 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:28,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:28,839 INFO L93 Difference]: Finished difference Result 87 states and 116 transitions. [2021-11-22 16:03:28,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-22 16:03:28,843 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2021-11-22 16:03:28,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:28,857 INFO L225 Difference]: With dead ends: 87 [2021-11-22 16:03:28,858 INFO L226 Difference]: Without dead ends: 41 [2021-11-22 16:03:28,871 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 [2021-11-22 16:03:28,879 INFO L933 BasicCegarLoop]: 48 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, 48 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 [2021-11-22 16:03:28,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:03:28,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-22 16:03:28,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-11-22 16:03:28,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 40 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) [2021-11-22 16:03:28,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2021-11-22 16:03:28,949 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 14 [2021-11-22 16:03:28,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:28,950 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2021-11-22 16:03:28,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:28,951 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2021-11-22 16:03:28,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-22 16:03:28,952 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:28,953 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:03:28,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 16:03:28,955 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 16:03:28,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:28,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1450342372, now seen corresponding path program 1 times [2021-11-22 16:03:28,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:28,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150186840] [2021-11-22 16:03:28,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:28,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:29,010 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 16:03:29,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1293108078] [2021-11-22 16:03:29,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:29,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:03:29,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:03:29,019 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:03:29,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 16:03:29,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:29,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 16:03:29,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:03:29,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:29,324 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 16:03:29,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:29,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150186840] [2021-11-22 16:03:29,325 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 16:03:29,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293108078] [2021-11-22 16:03:29,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293108078] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:03:29,333 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:03:29,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 16:03:29,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605390145] [2021-11-22 16:03:29,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:03:29,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 16:03:29,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:29,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 16:03:29,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:03:29,340 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:29,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:29,380 INFO L93 Difference]: Finished difference Result 51 states and 54 transitions. [2021-11-22 16:03:29,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 16:03:29,382 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-11-22 16:03:29,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:29,384 INFO L225 Difference]: With dead ends: 51 [2021-11-22 16:03:29,384 INFO L226 Difference]: Without dead ends: 43 [2021-11-22 16:03:29,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 16:03:29,388 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:03:29,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 113 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:03:29,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-22 16:03:29,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-11-22 16:03:29,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 42 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:29,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2021-11-22 16:03:29,414 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 15 [2021-11-22 16:03:29,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:29,415 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2021-11-22 16:03:29,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:29,416 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2021-11-22 16:03:29,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-22 16:03:29,421 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:29,426 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:03:29,454 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-22 16:03:29,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:03:29,636 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 16:03:29,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:29,637 INFO L85 PathProgramCache]: Analyzing trace with hash 2010729207, now seen corresponding path program 1 times [2021-11-22 16:03:29,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:29,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264996822] [2021-11-22 16:03:29,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:29,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:29,666 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 16:03:29,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [923938996] [2021-11-22 16:03:29,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:29,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:03:29,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:03:29,672 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:03:29,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-22 16:03:29,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:29,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-22 16:03:29,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:03:29,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:29,909 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 16:03:29,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:29,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264996822] [2021-11-22 16:03:29,910 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 16:03:29,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923938996] [2021-11-22 16:03:29,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923938996] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:03:29,911 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:03:29,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 16:03:29,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661869992] [2021-11-22 16:03:29,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:03:29,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 16:03:29,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:29,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 16:03:29,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 16:03:29,914 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:30,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:30,020 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2021-11-22 16:03:30,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 16:03:30,021 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2021-11-22 16:03:30,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:30,022 INFO L225 Difference]: With dead ends: 72 [2021-11-22 16:03:30,023 INFO L226 Difference]: Without dead ends: 64 [2021-11-22 16:03:30,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-22 16:03:30,025 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 85 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:03:30,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 86 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:03:30,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-22 16:03:30,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 44. [2021-11-22 16:03:30,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 38 states have (on average 1.236842105263158) internal successors, (47), 43 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) [2021-11-22 16:03:30,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-11-22 16:03:30,034 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 16 [2021-11-22 16:03:30,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:30,035 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-11-22 16:03:30,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:30,035 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-11-22 16:03:30,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-22 16:03:30,036 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:30,037 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:03:30,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-22 16:03:30,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:03:30,251 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 16:03:30,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:30,252 INFO L85 PathProgramCache]: Analyzing trace with hash -2091963452, now seen corresponding path program 1 times [2021-11-22 16:03:30,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:30,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028639354] [2021-11-22 16:03:30,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:30,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:30,266 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 16:03:30,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [112629102] [2021-11-22 16:03:30,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:30,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:03:30,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:03:30,268 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:03:30,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-22 16:03:30,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:30,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-22 16:03:30,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:03:30,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:30,476 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 16:03:30,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:30,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028639354] [2021-11-22 16:03:30,477 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 16:03:30,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112629102] [2021-11-22 16:03:30,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112629102] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:03:30,478 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:03:30,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-22 16:03:30,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995807589] [2021-11-22 16:03:30,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:03:30,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 16:03:30,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:30,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 16:03:30,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-22 16:03:30,480 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:30,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:30,755 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2021-11-22 16:03:30,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-22 16:03:30,756 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2021-11-22 16:03:30,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:30,759 INFO L225 Difference]: With dead ends: 84 [2021-11-22 16:03:30,759 INFO L226 Difference]: Without dead ends: 82 [2021-11-22 16:03:30,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-22 16:03:30,765 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 115 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:03:30,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 131 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:03:30,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-22 16:03:30,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 47. [2021-11-22 16:03:30,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 46 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:30,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-11-22 16:03:30,792 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 17 [2021-11-22 16:03:30,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:30,793 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-11-22 16:03:30,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:30,793 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-11-22 16:03:30,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-22 16:03:30,794 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:30,794 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:03:30,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-22 16:03:30,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-11-22 16:03:30,995 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 16:03:30,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:30,996 INFO L85 PathProgramCache]: Analyzing trace with hash -332025913, now seen corresponding path program 1 times [2021-11-22 16:03:30,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:30,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887311981] [2021-11-22 16:03:30,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:30,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:31,009 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 16:03:31,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1215276591] [2021-11-22 16:03:31,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:31,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:03:31,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:03:31,011 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:03:31,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-22 16:03:31,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:31,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-22 16:03:31,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:03:31,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:31,387 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 16:03:31,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:31,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887311981] [2021-11-22 16:03:31,387 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 16:03:31,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215276591] [2021-11-22 16:03:31,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215276591] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:03:31,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:03:31,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-22 16:03:31,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671067926] [2021-11-22 16:03:31,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:03:31,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 16:03:31,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:31,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 16:03:31,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-22 16:03:31,390 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:31,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:31,497 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2021-11-22 16:03:31,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 16:03:31,498 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-11-22 16:03:31,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:31,499 INFO L225 Difference]: With dead ends: 67 [2021-11-22 16:03:31,499 INFO L226 Difference]: Without dead ends: 65 [2021-11-22 16:03:31,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-22 16:03:31,500 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 62 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:03:31,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 118 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:03:31,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-22 16:03:31,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2021-11-22 16:03:31,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 57 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:31,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2021-11-22 16:03:31,511 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 19 [2021-11-22 16:03:31,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:31,512 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2021-11-22 16:03:31,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:31,512 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2021-11-22 16:03:31,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-22 16:03:31,513 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:31,513 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:03:31,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-22 16:03:31,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:03:31,716 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 16:03:31,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:31,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1765527645, now seen corresponding path program 1 times [2021-11-22 16:03:31,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:31,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856371386] [2021-11-22 16:03:31,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:31,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:31,743 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 16:03:31,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [895529218] [2021-11-22 16:03:31,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:31,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:03:31,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:03:31,768 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:03:31,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-22 16:03:31,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:31,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-22 16:03:31,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:03:31,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:31,932 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 16:03:31,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:31,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856371386] [2021-11-22 16:03:31,933 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 16:03:31,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895529218] [2021-11-22 16:03:31,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895529218] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:03:31,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:03:31,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 16:03:31,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722495910] [2021-11-22 16:03:31,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:03:31,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 16:03:31,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:31,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 16:03:31,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-22 16:03:31,935 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 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) [2021-11-22 16:03:31,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:31,965 INFO L93 Difference]: Finished difference Result 89 states and 101 transitions. [2021-11-22 16:03:31,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 16:03:31,965 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2021-11-22 16:03:31,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:31,970 INFO L225 Difference]: With dead ends: 89 [2021-11-22 16:03:31,970 INFO L226 Difference]: Without dead ends: 58 [2021-11-22 16:03:31,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-22 16:03:31,975 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 9 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:03:31,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 142 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:03:31,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-22 16:03:31,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-11-22 16:03:31,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 52 states have (on average 1.2692307692307692) internal successors, (66), 57 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:31,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-11-22 16:03:31,997 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 21 [2021-11-22 16:03:31,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:31,998 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-11-22 16:03:31,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:31,998 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-11-22 16:03:31,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-22 16:03:31,999 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:32,003 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:03:32,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-22 16:03:32,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:03:32,226 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 16:03:32,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:32,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1249165206, now seen corresponding path program 1 times [2021-11-22 16:03:32,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:32,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960692371] [2021-11-22 16:03:32,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:32,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:32,237 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 16:03:32,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [627143907] [2021-11-22 16:03:32,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:32,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:03:32,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:03:32,239 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:03:32,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-22 16:03:32,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:32,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-22 16:03:32,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:03:32,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:32,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 16:03:32,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:32,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960692371] [2021-11-22 16:03:32,711 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 16:03:32,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627143907] [2021-11-22 16:03:32,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627143907] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:03:32,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:03:32,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-22 16:03:32,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62931406] [2021-11-22 16:03:32,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:03:32,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 16:03:32,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:32,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 16:03:32,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-22 16:03:32,715 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 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) [2021-11-22 16:03:32,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:32,855 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2021-11-22 16:03:32,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-22 16:03:32,856 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 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) Word has length 21 [2021-11-22 16:03:32,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:32,857 INFO L225 Difference]: With dead ends: 65 [2021-11-22 16:03:32,858 INFO L226 Difference]: Without dead ends: 63 [2021-11-22 16:03:32,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-22 16:03:32,859 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 60 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:03:32,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 103 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:03:32,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-22 16:03:32,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 58. [2021-11-22 16:03:32,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 52 states have (on average 1.25) internal successors, (65), 57 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) [2021-11-22 16:03:32,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2021-11-22 16:03:32,884 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 21 [2021-11-22 16:03:32,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:32,884 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2021-11-22 16:03:32,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 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) [2021-11-22 16:03:32,885 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2021-11-22 16:03:32,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-22 16:03:32,886 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:32,886 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:03:32,914 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-22 16:03:33,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-22 16:03:33,087 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 16:03:33,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:33,087 INFO L85 PathProgramCache]: Analyzing trace with hash 2143237549, now seen corresponding path program 1 times [2021-11-22 16:03:33,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:33,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828825198] [2021-11-22 16:03:33,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:33,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:33,098 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 16:03:33,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1550079657] [2021-11-22 16:03:33,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:33,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:03:33,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:03:33,119 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:03:33,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-22 16:03:33,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:33,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-22 16:03:33,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:03:33,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:33,542 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 16:03:33,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:33,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828825198] [2021-11-22 16:03:33,542 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 16:03:33,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550079657] [2021-11-22 16:03:33,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550079657] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:03:33,543 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:03:33,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 16:03:33,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679913342] [2021-11-22 16:03:33,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:03:33,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 16:03:33,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:33,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 16:03:33,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 16:03:33,545 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:33,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:33,628 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2021-11-22 16:03:33,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 16:03:33,628 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2021-11-22 16:03:33,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:33,630 INFO L225 Difference]: With dead ends: 70 [2021-11-22 16:03:33,630 INFO L226 Difference]: Without dead ends: 68 [2021-11-22 16:03:33,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 16:03:33,631 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 23 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:03:33,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 95 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:03:33,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-22 16:03:33,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 58. [2021-11-22 16:03:33,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 52 states have (on average 1.2307692307692308) internal successors, (64), 57 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:33,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2021-11-22 16:03:33,640 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 23 [2021-11-22 16:03:33,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:33,640 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2021-11-22 16:03:33,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:33,641 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2021-11-22 16:03:33,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-22 16:03:33,642 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:33,642 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, 1, 1, 1, 1, 1, 1] [2021-11-22 16:03:33,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-22 16:03:33,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:03:33,857 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 16:03:33,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:33,857 INFO L85 PathProgramCache]: Analyzing trace with hash 809346849, now seen corresponding path program 1 times [2021-11-22 16:03:33,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:33,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129019885] [2021-11-22 16:03:33,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:33,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:33,867 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 16:03:33,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [780143882] [2021-11-22 16:03:33,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:33,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:03:33,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:03:33,869 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:03:33,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-22 16:03:33,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:33,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-22 16:03:33,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:03:34,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:34,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:03:34,218 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:34,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:34,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129019885] [2021-11-22 16:03:34,219 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 16:03:34,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780143882] [2021-11-22 16:03:34,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780143882] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:03:34,220 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:03:34,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-11-22 16:03:34,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998956875] [2021-11-22 16:03:34,221 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 16:03:34,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 16:03:34,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:34,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 16:03:34,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-22 16:03:34,222 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 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) [2021-11-22 16:03:34,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:34,450 INFO L93 Difference]: Finished difference Result 113 states and 129 transitions. [2021-11-22 16:03:34,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-22 16:03:34,451 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 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) Word has length 28 [2021-11-22 16:03:34,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:34,452 INFO L225 Difference]: With dead ends: 113 [2021-11-22 16:03:34,452 INFO L226 Difference]: Without dead ends: 111 [2021-11-22 16:03:34,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-22 16:03:34,453 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 51 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 16:03:34,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 153 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 16:03:34,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-22 16:03:34,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 55. [2021-11-22 16:03:34,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.2) internal successors, (60), 54 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:34,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2021-11-22 16:03:34,464 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 28 [2021-11-22 16:03:34,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:34,465 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2021-11-22 16:03:34,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 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) [2021-11-22 16:03:34,465 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2021-11-22 16:03:34,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-22 16:03:34,466 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:34,467 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:03:34,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-22 16:03:34,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:03:34,680 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 16:03:34,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:34,681 INFO L85 PathProgramCache]: Analyzing trace with hash 259712123, now seen corresponding path program 1 times [2021-11-22 16:03:34,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:34,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967382569] [2021-11-22 16:03:34,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:34,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:34,691 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 16:03:34,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [60468533] [2021-11-22 16:03:34,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:34,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:03:34,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:03:34,693 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:03:34,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-22 16:03:34,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:34,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-22 16:03:34,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:03:34,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:34,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:03:34,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:34,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:34,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967382569] [2021-11-22 16:03:34,969 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 16:03:34,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60468533] [2021-11-22 16:03:34,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60468533] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:03:34,970 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:03:34,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-11-22 16:03:34,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031883857] [2021-11-22 16:03:34,970 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 16:03:34,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-22 16:03:34,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:34,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-22 16:03:34,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-22 16:03:34,975 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand has 10 states, 10 states have (on average 5.7) internal successors, (57), 9 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) [2021-11-22 16:03:35,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:35,080 INFO L93 Difference]: Finished difference Result 180 states and 199 transitions. [2021-11-22 16:03:35,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-22 16:03:35,081 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 9 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) Word has length 30 [2021-11-22 16:03:35,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:35,083 INFO L225 Difference]: With dead ends: 180 [2021-11-22 16:03:35,083 INFO L226 Difference]: Without dead ends: 172 [2021-11-22 16:03:35,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-11-22 16:03:35,084 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 124 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:03:35,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 220 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:03:35,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-22 16:03:35,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 130. [2021-11-22 16:03:35,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.232) internal successors, (154), 129 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:35,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 154 transitions. [2021-11-22 16:03:35,118 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 154 transitions. Word has length 30 [2021-11-22 16:03:35,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:35,118 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 154 transitions. [2021-11-22 16:03:35,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 9 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) [2021-11-22 16:03:35,119 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 154 transitions. [2021-11-22 16:03:35,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-22 16:03:35,120 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:35,120 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:03:35,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-22 16:03:35,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:03:35,344 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 16:03:35,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:35,344 INFO L85 PathProgramCache]: Analyzing trace with hash -539070144, now seen corresponding path program 1 times [2021-11-22 16:03:35,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:35,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332170984] [2021-11-22 16:03:35,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:35,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:35,354 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 16:03:35,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [259512144] [2021-11-22 16:03:35,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:35,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:03:35,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:03:35,356 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:03:35,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-22 16:03:35,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:35,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-22 16:03:35,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:03:35,550 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:35,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:03:35,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:35,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:35,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332170984] [2021-11-22 16:03:35,666 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 16:03:35,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259512144] [2021-11-22 16:03:35,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259512144] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:03:35,667 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:03:35,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-11-22 16:03:35,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429468437] [2021-11-22 16:03:35,667 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 16:03:35,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-22 16:03:35,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:35,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-22 16:03:35,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-22 16:03:35,669 INFO L87 Difference]: Start difference. First operand 130 states and 154 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:35,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:35,933 INFO L93 Difference]: Finished difference Result 279 states and 320 transitions. [2021-11-22 16:03:35,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-22 16:03:35,934 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 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 31 [2021-11-22 16:03:35,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:35,936 INFO L225 Difference]: With dead ends: 279 [2021-11-22 16:03:35,937 INFO L226 Difference]: Without dead ends: 271 [2021-11-22 16:03:35,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-11-22 16:03:35,938 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 318 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:03:35,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 222 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:03:35,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-11-22 16:03:35,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 192. [2021-11-22 16:03:35,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 187 states have (on average 1.2780748663101604) internal successors, (239), 191 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:35,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 239 transitions. [2021-11-22 16:03:35,971 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 239 transitions. Word has length 31 [2021-11-22 16:03:35,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:35,972 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 239 transitions. [2021-11-22 16:03:35,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:35,973 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 239 transitions. [2021-11-22 16:03:35,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-22 16:03:35,974 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:35,974 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:03:36,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-22 16:03:36,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:03:36,196 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 16:03:36,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:36,196 INFO L85 PathProgramCache]: Analyzing trace with hash -61365797, now seen corresponding path program 1 times [2021-11-22 16:03:36,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:36,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904962759] [2021-11-22 16:03:36,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:36,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:36,205 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 16:03:36,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [551843145] [2021-11-22 16:03:36,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:36,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:03:36,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:03:36,207 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:03:36,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-22 16:03:36,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:36,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-22 16:03:36,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:03:36,364 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:36,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:03:36,476 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:36,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:36,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904962759] [2021-11-22 16:03:36,477 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 16:03:36,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551843145] [2021-11-22 16:03:36,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551843145] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:03:36,478 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:03:36,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-11-22 16:03:36,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552409760] [2021-11-22 16:03:36,479 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 16:03:36,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-22 16:03:36,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:36,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-22 16:03:36,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-22 16:03:36,481 INFO L87 Difference]: Start difference. First operand 192 states and 239 transitions. Second operand has 10 states, 10 states have (on average 5.9) internal successors, (59), 9 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:36,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:36,586 INFO L93 Difference]: Finished difference Result 331 states and 403 transitions. [2021-11-22 16:03:36,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-22 16:03:36,587 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.9) internal successors, (59), 9 states have internal predecessors, (59), 0 states have call successors, (0), 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 33 [2021-11-22 16:03:36,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:36,589 INFO L225 Difference]: With dead ends: 331 [2021-11-22 16:03:36,589 INFO L226 Difference]: Without dead ends: 233 [2021-11-22 16:03:36,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-11-22 16:03:36,592 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 109 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 16:03:36,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 228 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 16:03:36,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-11-22 16:03:36,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 205. [2021-11-22 16:03:36,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.235) internal successors, (247), 204 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:36,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 247 transitions. [2021-11-22 16:03:36,636 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 247 transitions. Word has length 33 [2021-11-22 16:03:36,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:36,636 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 247 transitions. [2021-11-22 16:03:36,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.9) internal successors, (59), 9 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:36,637 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 247 transitions. [2021-11-22 16:03:36,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-22 16:03:36,642 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:36,643 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:03:36,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-22 16:03:36,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-22 16:03:36,857 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 16:03:36,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:36,858 INFO L85 PathProgramCache]: Analyzing trace with hash -612894498, now seen corresponding path program 1 times [2021-11-22 16:03:36,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:36,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12793256] [2021-11-22 16:03:36,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:36,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:36,876 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 16:03:36,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1019228618] [2021-11-22 16:03:36,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:36,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:03:36,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:03:36,881 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:03:36,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-22 16:03:36,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:36,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-22 16:03:36,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:03:37,314 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:37,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:03:37,472 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:37,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:37,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12793256] [2021-11-22 16:03:37,473 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 16:03:37,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019228618] [2021-11-22 16:03:37,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019228618] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-22 16:03:37,473 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-22 16:03:37,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 10 [2021-11-22 16:03:37,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8110422] [2021-11-22 16:03:37,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:03:37,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 16:03:37,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:37,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 16:03:37,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-22 16:03:37,476 INFO L87 Difference]: Start difference. First operand 205 states and 247 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:37,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:37,832 INFO L93 Difference]: Finished difference Result 311 states and 381 transitions. [2021-11-22 16:03:37,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-22 16:03:37,833 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-22 16:03:37,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:37,836 INFO L225 Difference]: With dead ends: 311 [2021-11-22 16:03:37,836 INFO L226 Difference]: Without dead ends: 303 [2021-11-22 16:03:37,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-11-22 16:03:37,838 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 104 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 16:03:37,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 98 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 16:03:37,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-11-22 16:03:37,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 286. [2021-11-22 16:03:37,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 281 states have (on average 1.2419928825622777) internal successors, (349), 285 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:37,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 349 transitions. [2021-11-22 16:03:37,895 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 349 transitions. Word has length 34 [2021-11-22 16:03:37,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:37,896 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 349 transitions. [2021-11-22 16:03:37,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:37,896 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 349 transitions. [2021-11-22 16:03:37,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-22 16:03:37,897 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:37,897 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:03:37,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-22 16:03:38,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-22 16:03:38,112 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 16:03:38,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:38,112 INFO L85 PathProgramCache]: Analyzing trace with hash -580935743, now seen corresponding path program 1 times [2021-11-22 16:03:38,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:38,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922332724] [2021-11-22 16:03:38,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:38,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:38,121 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 16:03:38,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1529998056] [2021-11-22 16:03:38,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:38,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:03:38,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:03:38,123 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:03:38,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-22 16:03:38,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:38,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-22 16:03:38,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:03:38,877 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:38,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:03:39,227 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:39,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:39,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922332724] [2021-11-22 16:03:39,228 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 16:03:39,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529998056] [2021-11-22 16:03:39,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529998056] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:03:39,228 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:03:39,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 13 [2021-11-22 16:03:39,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10799247] [2021-11-22 16:03:39,229 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 16:03:39,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-22 16:03:39,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:39,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-22 16:03:39,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-22 16:03:39,231 INFO L87 Difference]: Start difference. First operand 286 states and 349 transitions. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:40,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:40,482 INFO L93 Difference]: Finished difference Result 529 states and 661 transitions. [2021-11-22 16:03:40,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-22 16:03:40,483 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 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 [2021-11-22 16:03:40,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:40,491 INFO L225 Difference]: With dead ends: 529 [2021-11-22 16:03:40,491 INFO L226 Difference]: Without dead ends: 523 [2021-11-22 16:03:40,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=155, Invalid=601, Unknown=0, NotChecked=0, Total=756 [2021-11-22 16:03:40,495 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 173 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-22 16:03:40,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 339 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 185 Invalid, 0 Unknown, 102 Unchecked, 0.6s Time] [2021-11-22 16:03:40,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-11-22 16:03:40,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 471. [2021-11-22 16:03:40,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 466 states have (on average 1.2896995708154506) internal successors, (601), 470 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:40,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 601 transitions. [2021-11-22 16:03:40,590 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 601 transitions. Word has length 36 [2021-11-22 16:03:40,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:40,590 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 601 transitions. [2021-11-22 16:03:40,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:40,591 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 601 transitions. [2021-11-22 16:03:40,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-22 16:03:40,592 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:40,593 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:03:40,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-22 16:03:40,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:03:40,820 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 16:03:40,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:40,820 INFO L85 PathProgramCache]: Analyzing trace with hash 66657092, now seen corresponding path program 1 times [2021-11-22 16:03:40,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:40,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920226729] [2021-11-22 16:03:40,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:40,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:40,834 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 16:03:40,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [754772370] [2021-11-22 16:03:40,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:40,838 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:03:40,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:03:40,839 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:03:40,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-22 16:03:40,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:40,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-22 16:03:40,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:03:42,077 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:42,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:03:43,264 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:43,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:03:43,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920226729] [2021-11-22 16:03:43,264 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 16:03:43,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754772370] [2021-11-22 16:03:43,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754772370] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:03:43,265 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:03:43,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-11-22 16:03:43,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730068008] [2021-11-22 16:03:43,265 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 16:03:43,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-22 16:03:43,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:03:43,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-22 16:03:43,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-11-22 16:03:43,267 INFO L87 Difference]: Start difference. First operand 471 states and 601 transitions. Second operand has 16 states, 16 states have (on average 4.3125) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:50,641 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 16:03:57,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:03:57,562 INFO L93 Difference]: Finished difference Result 1148 states and 1500 transitions. [2021-11-22 16:03:57,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-22 16:03:57,563 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 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 38 [2021-11-22 16:03:57,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:03:57,572 INFO L225 Difference]: With dead ends: 1148 [2021-11-22 16:03:57,572 INFO L226 Difference]: Without dead ends: 1146 [2021-11-22 16:03:57,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=595, Invalid=1475, Unknown=0, NotChecked=0, Total=2070 [2021-11-22 16:03:57,575 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 370 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 105 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-11-22 16:03:57,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 254 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 255 Invalid, 1 Unknown, 0 Unchecked, 5.9s Time] [2021-11-22 16:03:57,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1146 states. [2021-11-22 16:03:57,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1146 to 828. [2021-11-22 16:03:57,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 823 states have (on average 1.2879708383961117) internal successors, (1060), 827 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:57,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1060 transitions. [2021-11-22 16:03:57,794 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1060 transitions. Word has length 38 [2021-11-22 16:03:57,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:03:57,794 INFO L470 AbstractCegarLoop]: Abstraction has 828 states and 1060 transitions. [2021-11-22 16:03:57,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:03:57,795 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1060 transitions. [2021-11-22 16:03:57,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-22 16:03:57,796 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:03:57,796 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:03:57,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-22 16:03:58,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:03:58,021 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 16:03:58,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:03:58,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1695499741, now seen corresponding path program 1 times [2021-11-22 16:03:58,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:03:58,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904820812] [2021-11-22 16:03:58,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:58,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:03:58,029 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 16:03:58,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1913812134] [2021-11-22 16:03:58,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:03:58,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:03:58,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:03:58,035 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:03:58,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-22 16:03:58,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:03:58,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-22 16:03:58,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:03:59,099 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:03:59,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:04:00,079 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:00,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:04:00,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904820812] [2021-11-22 16:04:00,079 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 16:04:00,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913812134] [2021-11-22 16:04:00,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913812134] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:04:00,080 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:04:00,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-11-22 16:04:00,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600429080] [2021-11-22 16:04:00,080 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 16:04:00,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-22 16:04:00,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:04:00,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-22 16:04:00,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-22 16:04:00,082 INFO L87 Difference]: Start difference. First operand 828 states and 1060 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 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) [2021-11-22 16:04:09,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:04:09,114 INFO L93 Difference]: Finished difference Result 1361 states and 1737 transitions. [2021-11-22 16:04:09,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-22 16:04:09,115 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 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) Word has length 42 [2021-11-22 16:04:09,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:04:09,125 INFO L225 Difference]: With dead ends: 1361 [2021-11-22 16:04:09,125 INFO L226 Difference]: Without dead ends: 1353 [2021-11-22 16:04:09,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=424, Invalid=1468, Unknown=0, NotChecked=0, Total=1892 [2021-11-22 16:04:09,128 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 347 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-22 16:04:09,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 518 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-11-22 16:04:09,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1353 states. [2021-11-22 16:04:09,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1353 to 1219. [2021-11-22 16:04:09,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1219 states, 1214 states have (on average 1.299011532125206) internal successors, (1577), 1218 states have internal predecessors, (1577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:09,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 1577 transitions. [2021-11-22 16:04:09,462 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 1577 transitions. Word has length 42 [2021-11-22 16:04:09,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:04:09,462 INFO L470 AbstractCegarLoop]: Abstraction has 1219 states and 1577 transitions. [2021-11-22 16:04:09,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 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) [2021-11-22 16:04:09,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 1577 transitions. [2021-11-22 16:04:09,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-22 16:04:09,464 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:04:09,464 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:04:09,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-22 16:04:09,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:04:09,680 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 16:04:09,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:04:09,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1573031322, now seen corresponding path program 2 times [2021-11-22 16:04:09,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:04:09,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215229783] [2021-11-22 16:04:09,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:04:09,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:04:09,697 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 16:04:09,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [465337163] [2021-11-22 16:04:09,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 16:04:09,699 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:04:09,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:04:09,701 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:04:09,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-22 16:04:09,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 16:04:09,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:04:09,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-22 16:04:09,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:04:09,906 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-22 16:04:09,906 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 16:04:09,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:04:09,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215229783] [2021-11-22 16:04:09,907 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 16:04:09,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465337163] [2021-11-22 16:04:09,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465337163] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:04:09,907 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:04:09,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-22 16:04:09,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034411637] [2021-11-22 16:04:09,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:04:09,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 16:04:09,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:04:09,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 16:04:09,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-22 16:04:09,909 INFO L87 Difference]: Start difference. First operand 1219 states and 1577 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 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) [2021-11-22 16:04:10,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:04:10,234 INFO L93 Difference]: Finished difference Result 1934 states and 2510 transitions. [2021-11-22 16:04:10,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 16:04:10,235 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 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 57 [2021-11-22 16:04:10,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:04:10,242 INFO L225 Difference]: With dead ends: 1934 [2021-11-22 16:04:10,242 INFO L226 Difference]: Without dead ends: 935 [2021-11-22 16:04:10,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-22 16:04:10,247 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 39 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:04:10,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 175 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:04:10,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2021-11-22 16:04:10,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 862. [2021-11-22 16:04:10,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 857 states have (on average 1.2858809801633606) internal successors, (1102), 861 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:10,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1102 transitions. [2021-11-22 16:04:10,457 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1102 transitions. Word has length 57 [2021-11-22 16:04:10,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:04:10,458 INFO L470 AbstractCegarLoop]: Abstraction has 862 states and 1102 transitions. [2021-11-22 16:04:10,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 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) [2021-11-22 16:04:10,458 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1102 transitions. [2021-11-22 16:04:10,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-22 16:04:10,459 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:04:10,460 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:04:10,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-22 16:04:10,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-22 16:04:10,676 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 16:04:10,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:04:10,676 INFO L85 PathProgramCache]: Analyzing trace with hash 783425505, now seen corresponding path program 1 times [2021-11-22 16:04:10,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:04:10,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443946017] [2021-11-22 16:04:10,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:04:10,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:04:10,683 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 16:04:10,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [170282000] [2021-11-22 16:04:10,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:04:10,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:04:10,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:04:10,694 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:04:10,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-22 16:04:10,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:04:10,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-22 16:04:10,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:04:12,010 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:12,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:04:22,422 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 40 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-22 16:04:22,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:04:22,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443946017] [2021-11-22 16:04:22,423 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 16:04:22,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170282000] [2021-11-22 16:04:22,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170282000] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:04:22,424 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:04:22,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2021-11-22 16:04:22,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074547241] [2021-11-22 16:04:22,424 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 16:04:22,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-22 16:04:22,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:04:22,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-22 16:04:22,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=369, Unknown=4, NotChecked=0, Total=462 [2021-11-22 16:04:22,426 INFO L87 Difference]: Start difference. First operand 862 states and 1102 transitions. Second operand has 22 states, 22 states have (on average 4.7272727272727275) internal successors, (104), 22 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:47,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:04:47,071 INFO L93 Difference]: Finished difference Result 993 states and 1257 transitions. [2021-11-22 16:04:47,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-22 16:04:47,073 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.7272727272727275) internal successors, (104), 22 states have internal predecessors, (104), 0 states have call successors, (0), 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 58 [2021-11-22 16:04:47,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:04:47,079 INFO L225 Difference]: With dead ends: 993 [2021-11-22 16:04:47,080 INFO L226 Difference]: Without dead ends: 991 [2021-11-22 16:04:47,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 32.6s TimeCoverageRelationStatistics Valid=486, Invalid=1480, Unknown=14, NotChecked=0, Total=1980 [2021-11-22 16:04:47,082 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 237 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-22 16:04:47,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 456 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 501 Invalid, 0 Unknown, 77 Unchecked, 1.4s Time] [2021-11-22 16:04:47,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2021-11-22 16:04:47,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 929. [2021-11-22 16:04:47,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 924 states have (on average 1.2792207792207793) internal successors, (1182), 928 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:47,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 1182 transitions. [2021-11-22 16:04:47,340 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 1182 transitions. Word has length 58 [2021-11-22 16:04:47,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:04:47,341 INFO L470 AbstractCegarLoop]: Abstraction has 929 states and 1182 transitions. [2021-11-22 16:04:47,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.7272727272727275) internal successors, (104), 22 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:47,342 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 1182 transitions. [2021-11-22 16:04:47,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-22 16:04:47,343 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:04:47,343 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:04:47,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-22 16:04:47,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-22 16:04:47,564 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 16:04:47,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:04:47,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1655872236, now seen corresponding path program 1 times [2021-11-22 16:04:47,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:04:47,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537681602] [2021-11-22 16:04:47,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:04:47,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:04:47,571 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 16:04:47,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1575138950] [2021-11-22 16:04:47,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:04:47,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:04:47,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:04:47,575 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:04:47,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-22 16:04:47,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:04:47,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-22 16:04:47,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:04:47,811 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 8 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:47,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:04:48,064 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 8 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:48,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:04:48,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537681602] [2021-11-22 16:04:48,065 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 16:04:48,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575138950] [2021-11-22 16:04:48,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575138950] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:04:48,065 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:04:48,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-11-22 16:04:48,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526124523] [2021-11-22 16:04:48,066 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 16:04:48,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-22 16:04:48,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:04:48,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-22 16:04:48,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2021-11-22 16:04:48,067 INFO L87 Difference]: Start difference. First operand 929 states and 1182 transitions. Second operand has 18 states, 18 states have (on average 6.555555555555555) internal successors, (118), 17 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:48,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:04:48,780 INFO L93 Difference]: Finished difference Result 2476 states and 3118 transitions. [2021-11-22 16:04:48,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-22 16:04:48,781 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.555555555555555) internal successors, (118), 17 states have internal predecessors, (118), 0 states have call successors, (0), 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 62 [2021-11-22 16:04:48,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:04:48,790 INFO L225 Difference]: With dead ends: 2476 [2021-11-22 16:04:48,790 INFO L226 Difference]: Without dead ends: 1685 [2021-11-22 16:04:48,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=311, Invalid=559, Unknown=0, NotChecked=0, Total=870 [2021-11-22 16:04:48,792 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 440 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:04:48,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [440 Valid, 381 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:04:48,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1685 states. [2021-11-22 16:04:49,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1685 to 1579. [2021-11-22 16:04:49,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1579 states, 1574 states have (on average 1.2141041931385006) internal successors, (1911), 1578 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:49,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1579 states to 1579 states and 1911 transitions. [2021-11-22 16:04:49,380 INFO L78 Accepts]: Start accepts. Automaton has 1579 states and 1911 transitions. Word has length 62 [2021-11-22 16:04:49,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:04:49,380 INFO L470 AbstractCegarLoop]: Abstraction has 1579 states and 1911 transitions. [2021-11-22 16:04:49,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.555555555555555) internal successors, (118), 17 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:49,381 INFO L276 IsEmpty]: Start isEmpty. Operand 1579 states and 1911 transitions. [2021-11-22 16:04:49,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-22 16:04:49,382 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:04:49,382 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:04:49,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-22 16:04:49,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:04:49,595 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 16:04:49,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:04:49,596 INFO L85 PathProgramCache]: Analyzing trace with hash 2113761892, now seen corresponding path program 1 times [2021-11-22 16:04:49,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:04:49,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103374586] [2021-11-22 16:04:49,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:04:49,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:04:49,603 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 16:04:49,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [24768514] [2021-11-22 16:04:49,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:04:49,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:04:49,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:04:49,605 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:04:49,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-22 16:04:49,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:04:49,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-22 16:04:49,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:04:49,901 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:49,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:04:50,182 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:50,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:04:50,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103374586] [2021-11-22 16:04:50,183 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 16:04:50,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24768514] [2021-11-22 16:04:50,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24768514] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:04:50,183 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:04:50,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-11-22 16:04:50,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40307149] [2021-11-22 16:04:50,184 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 16:04:50,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-22 16:04:50,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:04:50,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-22 16:04:50,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2021-11-22 16:04:50,185 INFO L87 Difference]: Start difference. First operand 1579 states and 1911 transitions. Second operand has 18 states, 18 states have (on average 7.277777777777778) internal successors, (131), 17 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:50,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:04:50,890 INFO L93 Difference]: Finished difference Result 1638 states and 1961 transitions. [2021-11-22 16:04:50,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-22 16:04:50,890 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 7.277777777777778) internal successors, (131), 17 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-22 16:04:50,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:04:50,900 INFO L225 Difference]: With dead ends: 1638 [2021-11-22 16:04:50,900 INFO L226 Difference]: Without dead ends: 1634 [2021-11-22 16:04:50,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=312, Invalid=558, Unknown=0, NotChecked=0, Total=870 [2021-11-22 16:04:50,902 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 264 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 16:04:50,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 362 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 16:04:50,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1634 states. [2021-11-22 16:04:51,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1634 to 1594. [2021-11-22 16:04:51,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1589 states have (on average 1.196979232221523) internal successors, (1902), 1593 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:51,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 1902 transitions. [2021-11-22 16:04:51,370 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 1902 transitions. Word has length 67 [2021-11-22 16:04:51,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:04:51,370 INFO L470 AbstractCegarLoop]: Abstraction has 1594 states and 1902 transitions. [2021-11-22 16:04:51,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.277777777777778) internal successors, (131), 17 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:51,371 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 1902 transitions. [2021-11-22 16:04:51,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-22 16:04:51,372 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:04:51,372 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:04:51,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-22 16:04:51,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:04:51,588 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 16:04:51,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:04:51,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1101897847, now seen corresponding path program 3 times [2021-11-22 16:04:51,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:04:51,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026583146] [2021-11-22 16:04:51,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:04:51,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:04:51,595 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 16:04:51,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1941588823] [2021-11-22 16:04:51,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 16:04:51,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:04:51,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:04:51,597 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:04:51,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-22 16:04:51,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-22 16:04:51,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 16:04:51,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-22 16:04:51,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:04:52,054 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-22 16:04:52,054 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-22 16:04:52,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:04:52,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026583146] [2021-11-22 16:04:52,055 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 16:04:52,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941588823] [2021-11-22 16:04:52,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941588823] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 16:04:52,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 16:04:52,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-22 16:04:52,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192301009] [2021-11-22 16:04:52,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 16:04:52,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-22 16:04:52,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:04:52,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-22 16:04:52,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-11-22 16:04:52,058 INFO L87 Difference]: Start difference. First operand 1594 states and 1902 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 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) [2021-11-22 16:04:53,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 16:04:53,669 INFO L93 Difference]: Finished difference Result 1614 states and 1918 transitions. [2021-11-22 16:04:53,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-22 16:04:53,669 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 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) Word has length 68 [2021-11-22 16:04:53,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 16:04:53,677 INFO L225 Difference]: With dead ends: 1614 [2021-11-22 16:04:53,678 INFO L226 Difference]: Without dead ends: 1606 [2021-11-22 16:04:53,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-11-22 16:04:53,680 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 80 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-22 16:04:53,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 166 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-22 16:04:53,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2021-11-22 16:04:54,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 1103. [2021-11-22 16:04:54,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1103 states, 1098 states have (on average 1.1475409836065573) internal successors, (1260), 1102 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:04:54,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1103 states to 1103 states and 1260 transitions. [2021-11-22 16:04:54,064 INFO L78 Accepts]: Start accepts. Automaton has 1103 states and 1260 transitions. Word has length 68 [2021-11-22 16:04:54,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 16:04:54,064 INFO L470 AbstractCegarLoop]: Abstraction has 1103 states and 1260 transitions. [2021-11-22 16:04:54,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 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) [2021-11-22 16:04:54,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1103 states and 1260 transitions. [2021-11-22 16:04:54,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-22 16:04:54,066 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 16:04:54,066 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 16:04:54,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-22 16:04:54,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-22 16:04:54,292 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-22 16:04:54,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 16:04:54,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1266301471, now seen corresponding path program 1 times [2021-11-22 16:04:54,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 16:04:54,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368338602] [2021-11-22 16:04:54,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:04:54,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 16:04:54,299 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-22 16:04:54,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2049073522] [2021-11-22 16:04:54,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 16:04:54,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 16:04:54,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 16:04:54,301 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 16:04:54,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad35c766-e44c-4125-884d-75fe41c12c65/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-22 16:04:54,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 16:04:54,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 79 conjunts are in the unsatisfiable core [2021-11-22 16:04:54,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 16:04:57,063 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 16:04:57,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 16:08:47,058 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse8 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse10 (* |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~yy~0#1|)) (.cse3 (* |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~yy~0#1|)) (.cse2 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse0 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse4 (* |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~yy~0#1|)) (.cse1 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse5 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (.cse6 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse9 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse11 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse7 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|))) (or (= |c_ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (not (= (+ .cse0 |c_ULTIMATE.start_main_~b~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~c~0#1|) .cse1 .cse2 .cse3 .cse4 .cse5) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~b~0#1|) .cse6 .cse7 .cse8 |c_ULTIMATE.start_main_~c~0#1| .cse9 .cse10 .cse11))) (not (= (+ |c_ULTIMATE.start_main_~b~0#1| .cse1 .cse5) (+ .cse6 .cse7 |c_ULTIMATE.start_main_~c~0#1| .cse9 .cse11))) (= (+ .cse8 (* 2 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (* 2 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|)) .cse10 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (+ (* 2 .cse3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|) .cse2 (* 2 .cse0) .cse4)) (not (= (+ (* 2 |c_ULTIMATE.start_main_~b~0#1|) .cse1 .cse5) (+ (* 2 .cse6) |c_ULTIMATE.start_main_~c~0#1| .cse9 .cse11 (* 2 .cse7)))))) is different from true [2021-11-22 16:09:31,423 WARN L227 SmtUtils]: Spent 11.00s on a formula simplification that was a NOOP. DAG size: 59 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 16:10:00,495 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 3 proven. 35 refuted. 70 times theorem prover too weak. 0 trivial. 4 not checked. [2021-11-22 16:10:00,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 16:10:00,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368338602] [2021-11-22 16:10:00,496 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-22 16:10:00,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049073522] [2021-11-22 16:10:00,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049073522] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 16:10:00,496 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 16:10:00,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 31 [2021-11-22 16:10:00,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978354417] [2021-11-22 16:10:00,497 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 16:10:00,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-22 16:10:00,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 16:10:00,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-22 16:10:00,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=574, Unknown=38, NotChecked=56, Total=930 [2021-11-22 16:10:00,499 INFO L87 Difference]: Start difference. First operand 1103 states and 1260 transitions. Second operand has 31 states, 31 states have (on average 4.612903225806452) internal successors, (143), 31 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 16:10:02,514 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 16:10:04,528 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 16:10:05,832 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 16:10:07,839 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 16:10:10,347 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 16:10:12,634 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 16:11:00,660 WARN L227 SmtUtils]: Spent 47.06s on a formula simplification. DAG size of input: 88 DAG size of output: 65 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 16:11:25,593 WARN L227 SmtUtils]: Spent 19.89s on a formula simplification. DAG size of input: 88 DAG size of output: 56 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 16:11:27,663 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 16:11:29,738 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse13 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~b~0#1|)) (.cse14 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse15 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse6 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse10 (* |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~yy~0#1|)) (.cse8 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse12 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|))) (let ((.cse7 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~c~0#1|)) (.cse5 (+ .cse8 .cse12)) (.cse27 (+ |c_ULTIMATE.start_main_~b~0#1| .cse8 .cse12)) (.cse17 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse19 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse22 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse16 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse18 (* |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~yy~0#1|)) (.cse23 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse21 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse24 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse25 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (.cse26 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse9 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse11 (* |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~yy~0#1|)) (.cse4 (= (+ .cse13 .cse14 .cse15) (+ .cse6 |c_ULTIMATE.start_main_~b~0#1| .cse10)))) (let ((.cse1 (not (= |c_ULTIMATE.start_main_~b~0#1| (+ .cse14 .cse15)))) (.cse3 (not .cse4)) (.cse28 (= (+ .cse22 .cse16 .cse18 .cse23 .cse21 .cse24) (+ .cse6 .cse25 .cse26 .cse9 .cse10 .cse11))) (.cse20 (not (= .cse27 (+ .cse14 .cse15 |c_ULTIMATE.start_main_~c~0#1| .cse17 .cse19)))) (.cse2 (not (= .cse5 (+ |c_ULTIMATE.start_main_~c~0#1| .cse17 .cse19)))) (.cse0 (= (+ .cse16 |c_ULTIMATE.start_main_~c~0#1| .cse17 .cse18 .cse19) (+ .cse7 .cse8 .cse9 .cse11 .cse12)))) (and (or .cse0 .cse1 .cse2 .cse3) .cse4 (or (not (= |c_ULTIMATE.start_main_~a~0#1| .cse5)) (not (= (+ .cse6 |c_ULTIMATE.start_main_~b~0#1| .cse7 .cse8 .cse9 .cse10 .cse11 .cse12) (+ .cse13 .cse14 .cse15 .cse16 |c_ULTIMATE.start_main_~c~0#1| .cse17 .cse18 .cse19))) .cse20 (= (+ .cse16 (* 2 .cse21) (* 2 .cse22) .cse18 .cse23 .cse24) (+ (* 2 .cse10) .cse25 .cse26 .cse9 (* 2 .cse6) .cse11)) (not (= (+ (* 2 |c_ULTIMATE.start_main_~b~0#1|) .cse8 .cse12) (+ (* 2 .cse14) |c_ULTIMATE.start_main_~c~0#1| .cse17 .cse19 (* 2 .cse15))))) (or (= (+ .cse22 .cse16 .cse18 .cse21) (+ .cse6 .cse25 .cse26 .cse10)) (not (= (+ .cse14 .cse15 |c_ULTIMATE.start_main_~a~0#1|) .cse27)) .cse1 .cse3) (or .cse28 .cse1 .cse20 .cse3) (or .cse28 .cse20 .cse2 (not .cse0)))))) is different from true [2021-11-22 16:11:52,268 WARN L227 SmtUtils]: Spent 18.86s on a formula simplification. DAG size of input: 81 DAG size of output: 41 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 16:12:19,477 WARN L227 SmtUtils]: Spent 22.67s on a formula simplification. DAG size of input: 82 DAG size of output: 50 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 16:12:43,452 WARN L227 SmtUtils]: Spent 13.66s on a formula simplification. DAG size of input: 78 DAG size of output: 41 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 16:13:18,818 WARN L227 SmtUtils]: Spent 20.67s on a formula simplification. DAG size of input: 80 DAG size of output: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 16:13:21,053 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 16:13:23,059 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 16:13:25,063 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 16:13:27,065 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 16:13:29,103 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 16:13:31,106 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 16:14:03,168 WARN L227 SmtUtils]: Spent 28.93s on a formula simplification. DAG size of input: 59 DAG size of output: 43 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 16:14:05,436 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse7 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~b~0#1|)) (.cse8 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse9 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse0 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse4 (* |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~yy~0#1|))) (let ((.cse1 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~c~0#1|)) (.cse2 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse6 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (.cse11 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse13 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse16 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse10 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse12 (* |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~yy~0#1|)) (.cse17 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse15 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse18 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse19 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (.cse20 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse3 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse5 (* |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~yy~0#1|)) (.cse25 (= (+ .cse7 .cse8 .cse9) (+ .cse0 |c_ULTIMATE.start_main_~b~0#1| .cse4)))) (let ((.cse22 (not (= |c_ULTIMATE.start_main_~b~0#1| (+ .cse8 .cse9)))) (.cse24 (not .cse25)) (.cse26 (= (+ .cse16 .cse10 .cse12 .cse17 .cse15 .cse18) (+ .cse0 .cse19 .cse20 .cse3 .cse4 .cse5))) (.cse14 (not (= (+ |c_ULTIMATE.start_main_~b~0#1| .cse2 .cse6) (+ .cse8 .cse9 |c_ULTIMATE.start_main_~c~0#1| .cse11 .cse13)))) (.cse23 (not (= (+ .cse2 .cse6) (+ |c_ULTIMATE.start_main_~c~0#1| .cse11 .cse13)))) (.cse21 (= (+ .cse10 |c_ULTIMATE.start_main_~c~0#1| .cse11 .cse12 .cse13) (+ .cse1 .cse2 .cse3 .cse5 .cse6)))) (and (or (not (= (+ .cse0 |c_ULTIMATE.start_main_~b~0#1| .cse1 .cse2 .cse3 .cse4 .cse5 .cse6) (+ .cse7 .cse8 .cse9 .cse10 |c_ULTIMATE.start_main_~c~0#1| .cse11 .cse12 .cse13))) .cse14 (= (+ .cse10 (* 2 .cse15) (* 2 .cse16) .cse12 .cse17 .cse18) (+ (* 2 .cse4) .cse19 .cse20 .cse3 (* 2 .cse0) .cse5)) (not (= (+ (* 2 |c_ULTIMATE.start_main_~b~0#1|) .cse2 .cse6) (+ (* 2 .cse8) |c_ULTIMATE.start_main_~c~0#1| .cse11 .cse13 (* 2 .cse9))))) (or .cse21 .cse22 .cse23 .cse24) .cse25 (<= 1 |c_ULTIMATE.start___VERIFIER_assert_~cond#1|) (or .cse26 .cse22 .cse14 .cse24) (or .cse26 .cse14 .cse23 (not .cse21)))))) is different from true [2021-11-22 16:14:07,722 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 16:14:09,437 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 16:14:39,795 WARN L227 SmtUtils]: Spent 26.87s on a formula simplification. DAG size of input: 91 DAG size of output: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 16:14:42,533 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 16:14:44,556 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse7 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~b~0#1|)) (.cse8 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse9 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse0 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse4 (* |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~yy~0#1|)) (.cse2 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse6 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|))) (let ((.cse21 (+ |c_ULTIMATE.start_main_~b~0#1| .cse2 .cse6)) (.cse11 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse13 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse16 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse10 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse12 (* |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~yy~0#1|)) (.cse17 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse15 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse18 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse19 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (.cse20 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse3 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse5 (* |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~yy~0#1|)) (.cse25 (= (+ .cse7 .cse8 .cse9) (+ .cse0 |c_ULTIMATE.start_main_~b~0#1| .cse4)))) (let ((.cse23 (not .cse25)) (.cse22 (not (= |c_ULTIMATE.start_main_~b~0#1| (+ .cse8 .cse9)))) (.cse24 (= (+ .cse16 .cse10 .cse12 .cse17 .cse15 .cse18) (+ .cse0 .cse19 .cse20 .cse3 .cse4 .cse5))) (.cse14 (not (= .cse21 (+ .cse8 .cse9 |c_ULTIMATE.start_main_~c~0#1| .cse11 .cse13)))) (.cse1 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~c~0#1|))) (and (or (not (= (+ .cse0 |c_ULTIMATE.start_main_~b~0#1| .cse1 .cse2 .cse3 .cse4 .cse5 .cse6) (+ .cse7 .cse8 .cse9 .cse10 |c_ULTIMATE.start_main_~c~0#1| .cse11 .cse12 .cse13))) .cse14 (= (+ .cse10 (* 2 .cse15) (* 2 .cse16) .cse12 .cse17 .cse18) (+ (* 2 .cse4) .cse19 .cse20 .cse3 (* 2 .cse0) .cse5)) (not (= (+ (* 2 |c_ULTIMATE.start_main_~b~0#1|) .cse2 .cse6) (+ (* 2 .cse8) |c_ULTIMATE.start_main_~c~0#1| .cse11 .cse13 (* 2 .cse9))))) (<= 1 |c_ULTIMATE.start___VERIFIER_assert_~cond#1|) (or (= (+ .cse16 .cse10 .cse12 .cse15) (+ .cse0 .cse19 .cse20 .cse4)) (not (= (+ .cse8 .cse9 |c_ULTIMATE.start_main_~a~0#1|) .cse21)) .cse22 .cse23) (or .cse24 .cse22 .cse14 .cse23) (or .cse25 .cse22) (or .cse24 .cse14 (not (= (+ .cse2 .cse6) (+ |c_ULTIMATE.start_main_~c~0#1| .cse11 .cse13))) (not (= (+ .cse10 |c_ULTIMATE.start_main_~c~0#1| .cse11 .cse12 .cse13) (+ .cse1 .cse2 .cse3 .cse5 .cse6)))))))) is different from true [2021-11-22 16:14:46,561 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 16:14:48,566 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 16:14:50,568 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 16:14:52,571 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 16:14:54,573 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 16:14:56,577 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 16:14:58,580 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 16:15:00,588 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 16:15:02,593 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 16:15:04,597 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 16:15:20,929 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 16:15:22,931 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 16:16:26,309 WARN L227 SmtUtils]: Spent 52.66s on a formula simplification. DAG size of input: 78 DAG size of output: 72 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-22 16:16:28,457 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 16:16:30,465 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-22 16:17:01,543 WARN L227 SmtUtils]: Spent 27.52s on a formula simplification. DAG size of input: 89 DAG size of output: 57 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)