./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-programs/partial_mod_count_4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-programs/partial_mod_count_4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d56d00b0e11a2318dd34043554d32ecd228c75c86ba1d3fcabadd2cc271a05aa --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:12:36,892 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:12:36,894 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:12:36,950 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:12:36,951 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:12:36,956 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:12:36,958 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:12:36,962 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:12:36,965 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:12:36,973 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:12:36,974 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:12:36,976 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:12:36,976 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:12:36,979 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:12:36,982 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:12:36,988 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:12:36,989 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:12:36,991 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:12:36,993 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:12:37,001 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:12:37,004 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:12:37,005 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:12:37,009 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:12:37,010 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:12:37,016 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:12:37,016 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:12:37,017 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:12:37,019 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:12:37,019 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:12:37,021 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:12:37,022 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:12:37,023 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:12:37,025 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:12:37,026 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:12:37,028 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:12:37,028 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:12:37,029 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:12:37,029 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:12:37,030 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:12:37,031 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:12:37,032 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:12:37,033 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 22:12:37,089 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:12:37,089 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:12:37,090 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:12:37,090 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:12:37,098 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:12:37,099 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:12:37,099 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:12:37,099 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:12:37,100 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:12:37,100 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:12:37,101 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:12:37,101 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:12:37,102 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 22:12:37,102 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:12:37,102 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 22:12:37,102 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:12:37,103 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 22:12:37,103 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:12:37,103 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 22:12:37,103 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:12:37,104 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:12:37,104 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:12:37,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:12:37,104 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:12:37,105 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:12:37,105 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 22:12:37,105 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:12:37,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:12:37,106 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 22:12:37,106 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 22:12:37,106 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 22:12:37,106 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:12:37,107 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_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d56d00b0e11a2318dd34043554d32ecd228c75c86ba1d3fcabadd2cc271a05aa [2021-11-02 22:12:37,480 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:12:37,522 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:12:37,524 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:12:37,526 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:12:37,526 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:12:37,527 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/array-programs/partial_mod_count_4.c [2021-11-02 22:12:37,597 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/data/8687bc626/3ef3c4ba925f49869e1fe62ac7acee2f/FLAG18d824c6b [2021-11-02 22:12:38,168 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:12:38,169 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/sv-benchmarks/c/array-programs/partial_mod_count_4.c [2021-11-02 22:12:38,180 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/data/8687bc626/3ef3c4ba925f49869e1fe62ac7acee2f/FLAG18d824c6b [2021-11-02 22:12:38,540 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/data/8687bc626/3ef3c4ba925f49869e1fe62ac7acee2f [2021-11-02 22:12:38,542 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:12:38,544 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 22:12:38,547 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:12:38,547 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:12:38,550 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:12:38,551 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:12:38" (1/1) ... [2021-11-02 22:12:38,552 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61c6b037 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:12:38, skipping insertion in model container [2021-11-02 22:12:38,553 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:12:38" (1/1) ... [2021-11-02 22:12:38,560 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:12:38,572 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:12:38,780 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/sv-benchmarks/c/array-programs/partial_mod_count_4.c[323,336] [2021-11-02 22:12:38,816 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:12:38,831 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:12:38,847 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/sv-benchmarks/c/array-programs/partial_mod_count_4.c[323,336] [2021-11-02 22:12:38,871 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:12:38,888 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:12:38,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:12:38 WrapperNode [2021-11-02 22:12:38,889 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:12:38,890 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 22:12:38,891 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 22:12:38,891 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 22:12:38,900 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:12:38" (1/1) ... [2021-11-02 22:12:38,909 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:12:38" (1/1) ... [2021-11-02 22:12:38,946 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 22:12:38,948 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:12:38,948 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:12:38,948 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:12:38,958 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:12:38" (1/1) ... [2021-11-02 22:12:38,958 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:12:38" (1/1) ... [2021-11-02 22:12:38,971 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:12:38" (1/1) ... [2021-11-02 22:12:38,973 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:12:38" (1/1) ... [2021-11-02 22:12:38,979 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:12:38" (1/1) ... [2021-11-02 22:12:38,983 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:12:38" (1/1) ... [2021-11-02 22:12:38,985 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:12:38" (1/1) ... [2021-11-02 22:12:38,987 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:12:38,988 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:12:38,989 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:12:38,989 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:12:38,990 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:12:38" (1/1) ... [2021-11-02 22:12:39,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:12:39,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:12:39,041 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:12:39,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:12:39,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 22:12:39,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:12:39,091 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:12:39,091 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-02 22:12:39,092 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:12:39,092 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:12:39,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 22:12:39,397 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:12:39,397 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-11-02 22:12:39,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:12:39 BoogieIcfgContainer [2021-11-02 22:12:39,399 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:12:39,401 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:12:39,401 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:12:39,421 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:12:39,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:12:38" (1/3) ... [2021-11-02 22:12:39,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@697a7f0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:12:39, skipping insertion in model container [2021-11-02 22:12:39,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:12:38" (2/3) ... [2021-11-02 22:12:39,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@697a7f0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:12:39, skipping insertion in model container [2021-11-02 22:12:39,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:12:39" (3/3) ... [2021-11-02 22:12:39,424 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_mod_count_4.c [2021-11-02 22:12:39,429 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:12:39,429 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 22:12:39,478 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:12:39,490 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-02 22:12:39,491 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-02 22:12:39,506 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 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) [2021-11-02 22:12:39,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-02 22:12:39,512 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:12:39,512 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:12:39,513 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:12:39,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:12:39,523 INFO L85 PathProgramCache]: Analyzing trace with hash -694175938, now seen corresponding path program 1 times [2021-11-02 22:12:39,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:12:39,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854385326] [2021-11-02 22:12:39,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:12:39,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:12:39,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:12:39,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:12:39,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:12:39,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854385326] [2021-11-02 22:12:39,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854385326] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:12:39,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:12:39,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:12:39,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382243227] [2021-11-02 22:12:39,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-02 22:12:39,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:12:39,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-02 22:12:39,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 22:12:39,779 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 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) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:39,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:12:39,795 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2021-11-02 22:12:39,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-02 22:12:39,797 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-11-02 22:12:39,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:12:39,805 INFO L225 Difference]: With dead ends: 29 [2021-11-02 22:12:39,805 INFO L226 Difference]: Without dead ends: 13 [2021-11-02 22:12:39,809 INFO L786 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 [2021-11-02 22:12:39,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-02 22:12:39,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-02 22:12:39,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 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) [2021-11-02 22:12:39,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2021-11-02 22:12:39,843 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 9 [2021-11-02 22:12:39,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:12:39,844 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2021-11-02 22:12:39,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:39,845 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2021-11-02 22:12:39,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-02 22:12:39,846 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:12:39,846 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:12:39,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:12:39,847 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:12:39,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:12:39,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1866781837, now seen corresponding path program 1 times [2021-11-02 22:12:39,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:12:39,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052660953] [2021-11-02 22:12:39,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:12:39,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:12:39,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:12:39,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:12:39,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:12:39,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052660953] [2021-11-02 22:12:39,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052660953] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:12:39,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:12:39,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:12:39,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338241237] [2021-11-02 22:12:39,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:12:39,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:12:39,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:12:39,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:12:39,967 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:40,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:12:40,014 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2021-11-02 22:12:40,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:12:40,015 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-11-02 22:12:40,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:12:40,016 INFO L225 Difference]: With dead ends: 34 [2021-11-02 22:12:40,016 INFO L226 Difference]: Without dead ends: 23 [2021-11-02 22:12:40,017 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:12:40,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-02 22:12:40,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 15. [2021-11-02 22:12:40,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:40,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2021-11-02 22:12:40,022 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 9 [2021-11-02 22:12:40,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:12:40,026 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2021-11-02 22:12:40,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:40,027 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2021-11-02 22:12:40,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-02 22:12:40,029 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:12:40,029 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:12:40,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 22:12:40,030 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:12:40,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:12:40,036 INFO L85 PathProgramCache]: Analyzing trace with hash 97563565, now seen corresponding path program 1 times [2021-11-02 22:12:40,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:12:40,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421575866] [2021-11-02 22:12:40,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:12:40,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:12:40,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:12:40,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:12:40,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:12:40,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421575866] [2021-11-02 22:12:40,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421575866] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:12:40,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690219194] [2021-11-02 22:12:40,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:12:40,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:12:40,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:12:40,127 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:12:40,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 22:12:40,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:12:40,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 22:12:40,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:12:40,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:12:40,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690219194] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:12:40,387 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:12:40,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-02 22:12:40,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507522709] [2021-11-02 22:12:40,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:12:40,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:12:40,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:12:40,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:12:40,390 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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) [2021-11-02 22:12:40,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:12:40,454 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2021-11-02 22:12:40,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:12:40,455 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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 12 [2021-11-02 22:12:40,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:12:40,456 INFO L225 Difference]: With dead ends: 44 [2021-11-02 22:12:40,456 INFO L226 Difference]: Without dead ends: 33 [2021-11-02 22:12:40,457 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:12:40,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-02 22:12:40,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 18. [2021-11-02 22:12:40,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:40,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-11-02 22:12:40,462 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2021-11-02 22:12:40,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:12:40,463 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-11-02 22:12:40,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 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) [2021-11-02 22:12:40,463 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-11-02 22:12:40,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-02 22:12:40,464 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:12:40,464 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:12:40,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:12:40,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:12:40,686 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:12:40,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:12:40,687 INFO L85 PathProgramCache]: Analyzing trace with hash 982026547, now seen corresponding path program 2 times [2021-11-02 22:12:40,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:12:40,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219540010] [2021-11-02 22:12:40,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:12:40,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:12:40,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:12:40,824 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:12:40,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:12:40,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219540010] [2021-11-02 22:12:40,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219540010] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:12:40,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98250887] [2021-11-02 22:12:40,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:12:40,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:12:40,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:12:40,827 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:12:40,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 22:12:40,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-02 22:12:40,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:12:40,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 22:12:40,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:12:41,281 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-02 22:12:41,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98250887] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:12:41,282 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:12:41,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-11-02 22:12:41,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176528628] [2021-11-02 22:12:41,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:12:41,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:12:41,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:12:41,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:12:41,284 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:41,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:12:41,385 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2021-11-02 22:12:41,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:12:41,386 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 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 [2021-11-02 22:12:41,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:12:41,387 INFO L225 Difference]: With dead ends: 35 [2021-11-02 22:12:41,387 INFO L226 Difference]: Without dead ends: 33 [2021-11-02 22:12:41,388 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-02 22:12:41,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-02 22:12:41,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2021-11-02 22:12:41,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 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) [2021-11-02 22:12:41,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-11-02 22:12:41,395 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 15 [2021-11-02 22:12:41,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:12:41,395 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-11-02 22:12:41,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:41,396 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-11-02 22:12:41,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-02 22:12:41,397 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:12:41,397 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:12:41,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 22:12:41,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:12:41,627 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:12:41,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:12:41,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1305492527, now seen corresponding path program 1 times [2021-11-02 22:12:41,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:12:41,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078332987] [2021-11-02 22:12:41,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:12:41,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:12:41,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:12:41,742 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:12:41,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:12:41,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078332987] [2021-11-02 22:12:41,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078332987] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:12:41,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645857468] [2021-11-02 22:12:41,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:12:41,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:12:41,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:12:41,747 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:12:41,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 22:12:41,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:12:41,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 22:12:41,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:12:41,953 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:12:41,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645857468] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:12:41,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:12:41,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-02 22:12:41,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170337656] [2021-11-02 22:12:41,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:12:41,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:12:41,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:12:41,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:12:41,961 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:42,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:12:42,053 INFO L93 Difference]: Finished difference Result 93 states and 111 transitions. [2021-11-02 22:12:42,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:12:42,054 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-02 22:12:42,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:12:42,058 INFO L225 Difference]: With dead ends: 93 [2021-11-02 22:12:42,058 INFO L226 Difference]: Without dead ends: 72 [2021-11-02 22:12:42,065 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:12:42,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-02 22:12:42,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 31. [2021-11-02 22:12:42,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:42,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2021-11-02 22:12:42,078 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 20 [2021-11-02 22:12:42,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:12:42,078 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2021-11-02 22:12:42,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:42,081 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2021-11-02 22:12:42,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-02 22:12:42,082 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:12:42,082 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:12:42,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 22:12:42,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:12:42,306 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:12:42,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:12:42,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1739926453, now seen corresponding path program 2 times [2021-11-02 22:12:42,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:12:42,307 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948887905] [2021-11-02 22:12:42,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:12:42,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:12:42,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:12:42,406 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:12:42,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:12:42,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948887905] [2021-11-02 22:12:42,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948887905] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:12:42,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411446109] [2021-11-02 22:12:42,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:12:42,407 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:12:42,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:12:42,410 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:12:42,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 22:12:42,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:12:42,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:12:42,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 22:12:42,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:12:42,649 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:12:42,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411446109] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:12:42,650 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:12:42,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-02 22:12:42,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965086834] [2021-11-02 22:12:42,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 22:12:42,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:12:42,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 22:12:42,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:12:42,653 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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) [2021-11-02 22:12:42,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:12:42,754 INFO L93 Difference]: Finished difference Result 113 states and 134 transitions. [2021-11-02 22:12:42,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:12:42,755 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 23 [2021-11-02 22:12:42,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:12:42,757 INFO L225 Difference]: With dead ends: 113 [2021-11-02 22:12:42,757 INFO L226 Difference]: Without dead ends: 92 [2021-11-02 22:12:42,758 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:12:42,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-02 22:12:42,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 34. [2021-11-02 22:12:42,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:42,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-11-02 22:12:42,765 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 23 [2021-11-02 22:12:42,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:12:42,766 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-11-02 22:12:42,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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) [2021-11-02 22:12:42,766 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-11-02 22:12:42,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-02 22:12:42,767 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:12:42,767 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:12:42,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-02 22:12:42,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:12:42,993 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:12:42,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:12:42,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1070414225, now seen corresponding path program 3 times [2021-11-02 22:12:42,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:12:42,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124010387] [2021-11-02 22:12:42,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:12:42,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:12:43,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:12:43,095 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:12:43,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:12:43,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124010387] [2021-11-02 22:12:43,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124010387] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:12:43,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514086641] [2021-11-02 22:12:43,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:12:43,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:12:43,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:12:43,098 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:12:43,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 22:12:43,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-02 22:12:43,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:12:43,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 22:12:43,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:12:43,318 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-02 22:12:43,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514086641] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:12:43,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:12:43,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-11-02 22:12:43,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826052167] [2021-11-02 22:12:43,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:12:43,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:12:43,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:12:43,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:12:43,326 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 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) [2021-11-02 22:12:43,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:12:43,389 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2021-11-02 22:12:43,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:12:43,389 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 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 26 [2021-11-02 22:12:43,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:12:43,391 INFO L225 Difference]: With dead ends: 79 [2021-11-02 22:12:43,391 INFO L226 Difference]: Without dead ends: 61 [2021-11-02 22:12:43,392 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:12:43,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-02 22:12:43,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 36. [2021-11-02 22:12:43,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:43,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-11-02 22:12:43,407 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 26 [2021-11-02 22:12:43,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:12:43,407 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-11-02 22:12:43,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 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) [2021-11-02 22:12:43,408 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-11-02 22:12:43,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-02 22:12:43,414 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:12:43,414 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:12:43,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-02 22:12:43,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:12:43,639 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:12:43,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:12:43,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1120934345, now seen corresponding path program 1 times [2021-11-02 22:12:43,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:12:43,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82743211] [2021-11-02 22:12:43,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:12:43,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:12:43,670 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:12:43,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [424614766] [2021-11-02 22:12:43,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:12:43,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:12:43,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:12:43,672 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:12:43,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 22:12:43,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:12:43,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-02 22:12:43,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:12:43,977 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:12:43,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:12:43,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82743211] [2021-11-02 22:12:43,979 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:12:43,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424614766] [2021-11-02 22:12:43,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424614766] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:12:43,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:12:43,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-02 22:12:43,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24311456] [2021-11-02 22:12:43,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:12:43,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:12:43,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:12:43,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:12:43,982 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:44,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:12:44,093 INFO L93 Difference]: Finished difference Result 157 states and 184 transitions. [2021-11-02 22:12:44,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 22:12:44,094 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-02 22:12:44,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:12:44,095 INFO L225 Difference]: With dead ends: 157 [2021-11-02 22:12:44,095 INFO L226 Difference]: Without dead ends: 134 [2021-11-02 22:12:44,096 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:12:44,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-02 22:12:44,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 42. [2021-11-02 22:12:44,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.146341463414634) internal successors, (47), 41 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) [2021-11-02 22:12:44,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-11-02 22:12:44,104 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 29 [2021-11-02 22:12:44,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:12:44,104 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-11-02 22:12:44,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:44,105 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-11-02 22:12:44,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-02 22:12:44,106 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:12:44,106 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:12:44,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-02 22:12:44,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-02 22:12:44,335 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:12:44,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:12:44,335 INFO L85 PathProgramCache]: Analyzing trace with hash -2107317257, now seen corresponding path program 2 times [2021-11-02 22:12:44,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:12:44,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383345254] [2021-11-02 22:12:44,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:12:44,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:12:44,350 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:12:44,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1551868740] [2021-11-02 22:12:44,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:12:44,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:12:44,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:12:44,352 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:12:44,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-02 22:12:44,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:12:44,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:12:44,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-02 22:12:44,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:12:44,699 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 22:12:44,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:12:44,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383345254] [2021-11-02 22:12:44,700 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:12:44,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551868740] [2021-11-02 22:12:44,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551868740] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:12:44,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:12:44,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-02 22:12:44,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306077978] [2021-11-02 22:12:44,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 22:12:44,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:12:44,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 22:12:44,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:12:44,702 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:44,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:12:44,819 INFO L93 Difference]: Finished difference Result 197 states and 230 transitions. [2021-11-02 22:12:44,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 22:12:44,819 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-02 22:12:44,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:12:44,821 INFO L225 Difference]: With dead ends: 197 [2021-11-02 22:12:44,821 INFO L226 Difference]: Without dead ends: 174 [2021-11-02 22:12:44,822 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:12:44,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-11-02 22:12:44,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 48. [2021-11-02 22:12:44,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.127659574468085) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:44,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2021-11-02 22:12:44,844 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 35 [2021-11-02 22:12:44,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:12:44,845 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2021-11-02 22:12:44,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:44,845 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2021-11-02 22:12:44,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-02 22:12:44,846 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:12:44,847 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:12:44,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-02 22:12:45,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:12:45,051 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:12:45,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:12:45,051 INFO L85 PathProgramCache]: Analyzing trace with hash -975924809, now seen corresponding path program 3 times [2021-11-02 22:12:45,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:12:45,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30120667] [2021-11-02 22:12:45,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:12:45,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:12:45,065 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:12:45,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1136090457] [2021-11-02 22:12:45,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:12:45,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:12:45,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:12:45,067 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:12:45,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-02 22:12:45,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-02 22:12:45,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:12:45,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-02 22:12:45,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:12:45,479 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-11-02 22:12:45,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:12:45,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30120667] [2021-11-02 22:12:45,480 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:12:45,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136090457] [2021-11-02 22:12:45,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136090457] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:12:45,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:12:45,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-11-02 22:12:45,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173461865] [2021-11-02 22:12:45,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:12:45,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:12:45,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:12:45,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:12:45,482 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:45,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:12:45,564 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2021-11-02 22:12:45,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 22:12:45,565 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-02 22:12:45,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:12:45,566 INFO L225 Difference]: With dead ends: 60 [2021-11-02 22:12:45,566 INFO L226 Difference]: Without dead ends: 58 [2021-11-02 22:12:45,567 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:12:45,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-02 22:12:45,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2021-11-02 22:12:45,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.1346153846153846) internal successors, (59), 52 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) [2021-11-02 22:12:45,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2021-11-02 22:12:45,573 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 41 [2021-11-02 22:12:45,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:12:45,574 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2021-11-02 22:12:45,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:45,574 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2021-11-02 22:12:45,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-02 22:12:45,575 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:12:45,576 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 8, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:12:45,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-02 22:12:45,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-02 22:12:45,791 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:12:45,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:12:45,791 INFO L85 PathProgramCache]: Analyzing trace with hash 2047403563, now seen corresponding path program 4 times [2021-11-02 22:12:45,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:12:45,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502385308] [2021-11-02 22:12:45,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:12:45,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:12:45,806 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:12:45,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1663559424] [2021-11-02 22:12:45,807 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:12:45,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:12:45,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:12:45,808 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:12:45,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-02 22:12:45,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:12:45,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:12:45,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-02 22:12:45,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:12:46,249 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 107 proven. 10 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-02 22:12:46,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:12:46,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502385308] [2021-11-02 22:12:46,250 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:12:46,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663559424] [2021-11-02 22:12:46,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663559424] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:12:46,250 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:12:46,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-02 22:12:46,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326156545] [2021-11-02 22:12:46,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 22:12:46,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:12:46,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 22:12:46,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=87, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:12:46,252 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:46,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:12:46,510 INFO L93 Difference]: Finished difference Result 211 states and 246 transitions. [2021-11-02 22:12:46,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 22:12:46,511 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-02 22:12:46,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:12:46,513 INFO L225 Difference]: With dead ends: 211 [2021-11-02 22:12:46,513 INFO L226 Difference]: Without dead ends: 188 [2021-11-02 22:12:46,513 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=96, Invalid=114, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:12:46,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-11-02 22:12:46,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 56. [2021-11-02 22:12:46,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 55 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:46,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2021-11-02 22:12:46,521 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 46 [2021-11-02 22:12:46,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:12:46,522 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2021-11-02 22:12:46,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:46,522 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2021-11-02 22:12:46,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-02 22:12:46,523 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:12:46,523 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 8, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-02 22:12:46,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-02 22:12:46,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-02 22:12:46,746 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:12:46,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:12:46,747 INFO L85 PathProgramCache]: Analyzing trace with hash -520854285, now seen corresponding path program 5 times [2021-11-02 22:12:46,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:12:46,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481150239] [2021-11-02 22:12:46,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:12:46,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:12:46,761 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:12:46,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [99571396] [2021-11-02 22:12:46,762 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:12:46,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:12:46,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:12:46,763 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:12:46,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-02 22:12:47,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-11-02 22:12:47,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:12:47,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-02 22:12:47,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:12:47,616 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-02 22:12:47,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:12:47,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481150239] [2021-11-02 22:12:47,617 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:12:47,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99571396] [2021-11-02 22:12:47,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99571396] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:12:47,617 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:12:47,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-02 22:12:47,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755377985] [2021-11-02 22:12:47,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 22:12:47,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:12:47,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 22:12:47,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:12:47,618 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:47,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:12:47,810 INFO L93 Difference]: Finished difference Result 314 states and 369 transitions. [2021-11-02 22:12:47,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 22:12:47,810 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 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 49 [2021-11-02 22:12:47,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:12:47,812 INFO L225 Difference]: With dead ends: 314 [2021-11-02 22:12:47,813 INFO L226 Difference]: Without dead ends: 283 [2021-11-02 22:12:47,813 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:12:47,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-11-02 22:12:47,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 65. [2021-11-02 22:12:47,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.125) internal successors, (72), 64 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:47,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2021-11-02 22:12:47,822 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 49 [2021-11-02 22:12:47,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:12:47,822 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2021-11-02 22:12:47,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:47,823 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2021-11-02 22:12:47,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-02 22:12:47,824 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:12:47,824 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 11, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-02 22:12:47,830 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-11-02 22:12:48,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:12:48,029 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:12:48,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:12:48,030 INFO L85 PathProgramCache]: Analyzing trace with hash -69913235, now seen corresponding path program 6 times [2021-11-02 22:12:48,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:12:48,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960744866] [2021-11-02 22:12:48,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:12:48,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:12:48,045 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:12:48,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1771149057] [2021-11-02 22:12:48,045 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:12:48,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:12:48,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:12:48,046 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:12:48,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-02 22:12:48,264 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-02 22:12:48,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:12:48,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 22:12:48,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:12:48,707 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-11-02 22:12:48,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:12:48,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960744866] [2021-11-02 22:12:48,708 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:12:48,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771149057] [2021-11-02 22:12:48,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771149057] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:12:48,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:12:48,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-02 22:12:48,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202821284] [2021-11-02 22:12:48,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:12:48,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:12:48,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:12:48,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:12:48,710 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 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) [2021-11-02 22:12:48,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:12:48,798 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2021-11-02 22:12:48,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:12:48,799 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 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 58 [2021-11-02 22:12:48,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:12:48,800 INFO L225 Difference]: With dead ends: 77 [2021-11-02 22:12:48,800 INFO L226 Difference]: Without dead ends: 75 [2021-11-02 22:12:48,800 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:12:48,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-02 22:12:48,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2021-11-02 22:12:48,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.1304347826086956) internal successors, (78), 69 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:48,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2021-11-02 22:12:48,808 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 58 [2021-11-02 22:12:48,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:12:48,808 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2021-11-02 22:12:48,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 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) [2021-11-02 22:12:48,809 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2021-11-02 22:12:48,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-02 22:12:48,810 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:12:48,810 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 11, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-11-02 22:12:48,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-02 22:12:49,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:12:49,037 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:12:49,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:12:49,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1619534901, now seen corresponding path program 7 times [2021-11-02 22:12:49,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:12:49,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316896178] [2021-11-02 22:12:49,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:12:49,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:12:49,053 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:12:49,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1533257043] [2021-11-02 22:12:49,053 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:12:49,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:12:49,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:12:49,054 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:12:49,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-02 22:12:49,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:12:49,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-02 22:12:49,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:12:49,725 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-02 22:12:49,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:12:49,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316896178] [2021-11-02 22:12:49,726 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:12:49,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533257043] [2021-11-02 22:12:49,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533257043] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:12:49,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:12:49,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-11-02 22:12:49,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987985147] [2021-11-02 22:12:49,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 22:12:49,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:12:49,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 22:12:49,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-02 22:12:49,728 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:49,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:12:49,933 INFO L93 Difference]: Finished difference Result 450 states and 529 transitions. [2021-11-02 22:12:49,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-02 22:12:49,934 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-02 22:12:49,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:12:49,936 INFO L225 Difference]: With dead ends: 450 [2021-11-02 22:12:49,937 INFO L226 Difference]: Without dead ends: 414 [2021-11-02 22:12:49,937 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-02 22:12:49,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-11-02 22:12:49,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 79. [2021-11-02 22:12:49,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1153846153846154) internal successors, (87), 78 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:49,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2021-11-02 22:12:49,947 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 63 [2021-11-02 22:12:49,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:12:49,948 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2021-11-02 22:12:49,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:49,948 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2021-11-02 22:12:49,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-02 22:12:49,949 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:12:49,950 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 14, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-11-02 22:12:49,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-02 22:12:50,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:12:50,174 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:12:50,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:12:50,175 INFO L85 PathProgramCache]: Analyzing trace with hash 206411567, now seen corresponding path program 8 times [2021-11-02 22:12:50,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:12:50,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123060306] [2021-11-02 22:12:50,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:12:50,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:12:50,190 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:12:50,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [865534495] [2021-11-02 22:12:50,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:12:50,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:12:50,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:12:50,192 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:12:50,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-02 22:12:50,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:12:50,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:12:50,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-02 22:12:50,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:12:51,013 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-02 22:12:51,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:12:51,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123060306] [2021-11-02 22:12:51,014 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:12:51,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865534495] [2021-11-02 22:12:51,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865534495] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:12:51,014 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:12:51,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-11-02 22:12:51,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272683010] [2021-11-02 22:12:51,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-02 22:12:51,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:12:51,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-02 22:12:51,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-11-02 22:12:51,017 INFO L87 Difference]: Start difference. First operand 79 states and 87 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 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) [2021-11-02 22:12:51,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:12:51,261 INFO L93 Difference]: Finished difference Result 540 states and 634 transitions. [2021-11-02 22:12:51,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-02 22:12:51,262 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 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 72 [2021-11-02 22:12:51,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:12:51,265 INFO L225 Difference]: With dead ends: 540 [2021-11-02 22:12:51,265 INFO L226 Difference]: Without dead ends: 504 [2021-11-02 22:12:51,266 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-11-02 22:12:51,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-11-02 22:12:51,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 88. [2021-11-02 22:12:51,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.103448275862069) internal successors, (96), 87 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:51,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2021-11-02 22:12:51,276 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 72 [2021-11-02 22:12:51,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:12:51,276 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2021-11-02 22:12:51,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 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) [2021-11-02 22:12:51,277 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2021-11-02 22:12:51,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-02 22:12:51,278 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:12:51,278 INFO L513 BasicCegarLoop]: trace histogram [19, 19, 17, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-11-02 22:12:51,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-02 22:12:51,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-02 22:12:51,506 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:12:51,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:12:51,507 INFO L85 PathProgramCache]: Analyzing trace with hash 306240885, now seen corresponding path program 9 times [2021-11-02 22:12:51,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:12:51,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248485826] [2021-11-02 22:12:51,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:12:51,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:12:51,521 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:12:51,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1402106338] [2021-11-02 22:12:51,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:12:51,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:12:51,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:12:51,542 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:12:51,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-02 22:12:51,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-02 22:12:51,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:12:51,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-02 22:12:51,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:12:52,380 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-11-02 22:12:52,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:12:52,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248485826] [2021-11-02 22:12:52,381 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:12:52,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402106338] [2021-11-02 22:12:52,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402106338] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:12:52,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:12:52,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-02 22:12:52,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642913597] [2021-11-02 22:12:52,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:12:52,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:12:52,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:12:52,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:12:52,385 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:52,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:12:52,490 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2021-11-02 22:12:52,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 22:12:52,491 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 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 81 [2021-11-02 22:12:52,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:12:52,492 INFO L225 Difference]: With dead ends: 100 [2021-11-02 22:12:52,492 INFO L226 Difference]: Without dead ends: 98 [2021-11-02 22:12:52,493 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:12:52,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-02 22:12:52,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2021-11-02 22:12:52,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.108695652173913) internal successors, (102), 92 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:52,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2021-11-02 22:12:52,500 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 81 [2021-11-02 22:12:52,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:12:52,501 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2021-11-02 22:12:52,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:52,501 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2021-11-02 22:12:52,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-02 22:12:52,502 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:12:52,502 INFO L513 BasicCegarLoop]: trace histogram [19, 19, 17, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1] [2021-11-02 22:12:52,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-02 22:12:52,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-02 22:12:52,710 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:12:52,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:12:52,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1355563309, now seen corresponding path program 10 times [2021-11-02 22:12:52,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:12:52,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886263408] [2021-11-02 22:12:52,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:12:52,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:12:52,732 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:12:52,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1636096866] [2021-11-02 22:12:52,732 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:12:52,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:12:52,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:12:52,733 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:12:52,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-02 22:12:53,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:12:53,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:12:53,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-02 22:12:53,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:12:53,694 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 508 proven. 24 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-02 22:12:53,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:12:53,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886263408] [2021-11-02 22:12:53,695 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:12:53,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636096866] [2021-11-02 22:12:53,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636096866] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:12:53,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:12:53,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-11-02 22:12:53,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632888201] [2021-11-02 22:12:53,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-02 22:12:53,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:12:53,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-02 22:12:53,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-11-02 22:12:53,697 INFO L87 Difference]: Start difference. First operand 93 states and 102 transitions. Second operand has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:54,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:12:54,187 INFO L93 Difference]: Finished difference Result 580 states and 680 transitions. [2021-11-02 22:12:54,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-02 22:12:54,187 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-02 22:12:54,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:12:54,190 INFO L225 Difference]: With dead ends: 580 [2021-11-02 22:12:54,190 INFO L226 Difference]: Without dead ends: 547 [2021-11-02 22:12:54,190 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=328, Invalid=374, Unknown=0, NotChecked=0, Total=702 [2021-11-02 22:12:54,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-11-02 22:12:54,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 96. [2021-11-02 22:12:54,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.1157894736842104) internal successors, (106), 95 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:54,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2021-11-02 22:12:54,201 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 86 [2021-11-02 22:12:54,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:12:54,201 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2021-11-02 22:12:54,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 23 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:54,202 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2021-11-02 22:12:54,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-02 22:12:54,202 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:12:54,203 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 17, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2021-11-02 22:12:54,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-02 22:12:54,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-02 22:12:54,422 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:12:54,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:12:54,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1036957617, now seen corresponding path program 11 times [2021-11-02 22:12:54,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:12:54,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130326032] [2021-11-02 22:12:54,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:12:54,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:12:54,452 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:12:54,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2096654964] [2021-11-02 22:12:54,453 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:12:54,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:12:54,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:12:54,454 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:12:54,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-02 22:12:55,648 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-11-02 22:12:55,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:12:55,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-02 22:12:55,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:12:56,356 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-02 22:12:56,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:12:56,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130326032] [2021-11-02 22:12:56,357 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:12:56,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096654964] [2021-11-02 22:12:56,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096654964] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:12:56,358 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:12:56,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-11-02 22:12:56,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969562520] [2021-11-02 22:12:56,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-02 22:12:56,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:12:56,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-02 22:12:56,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-02 22:12:56,360 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:56,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:12:56,703 INFO L93 Difference]: Finished difference Result 757 states and 892 transitions. [2021-11-02 22:12:56,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-02 22:12:56,704 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 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 89 [2021-11-02 22:12:56,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:12:56,708 INFO L225 Difference]: With dead ends: 757 [2021-11-02 22:12:56,708 INFO L226 Difference]: Without dead ends: 713 [2021-11-02 22:12:56,709 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-02 22:12:56,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-11-02 22:12:56,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 108. [2021-11-02 22:12:56,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.102803738317757) internal successors, (118), 107 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) [2021-11-02 22:12:56,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 118 transitions. [2021-11-02 22:12:56,723 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 118 transitions. Word has length 89 [2021-11-02 22:12:56,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:12:56,723 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 118 transitions. [2021-11-02 22:12:56,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:56,723 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 118 transitions. [2021-11-02 22:12:56,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-02 22:12:56,724 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:12:56,724 INFO L513 BasicCegarLoop]: trace histogram [24, 24, 21, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2021-11-02 22:12:56,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-02 22:12:56,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-02 22:12:56,932 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:12:56,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:12:56,933 INFO L85 PathProgramCache]: Analyzing trace with hash -445045967, now seen corresponding path program 12 times [2021-11-02 22:12:56,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:12:56,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605966002] [2021-11-02 22:12:56,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:12:56,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:12:56,955 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:12:56,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [865034763] [2021-11-02 22:12:56,956 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:12:56,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:12:56,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:12:56,957 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:12:56,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-02 22:12:57,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-02 22:12:57,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:12:57,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-02 22:12:57,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:12:58,378 INFO L134 CoverageAnalysis]: Checked inductivity of 898 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2021-11-02 22:12:58,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:12:58,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605966002] [2021-11-02 22:12:58,379 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:12:58,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865034763] [2021-11-02 22:12:58,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865034763] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:12:58,380 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:12:58,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-02 22:12:58,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512679659] [2021-11-02 22:12:58,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:12:58,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:12:58,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:12:58,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:12:58,381 INFO L87 Difference]: Start difference. First operand 108 states and 118 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2021-11-02 22:12:58,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:12:58,488 INFO L93 Difference]: Finished difference Result 120 states and 132 transitions. [2021-11-02 22:12:58,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 22:12:58,488 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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 101 [2021-11-02 22:12:58,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:12:58,490 INFO L225 Difference]: With dead ends: 120 [2021-11-02 22:12:58,490 INFO L226 Difference]: Without dead ends: 118 [2021-11-02 22:12:58,491 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-11-02 22:12:58,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-02 22:12:58,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 113. [2021-11-02 22:12:58,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.1071428571428572) internal successors, (124), 112 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:12:58,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 124 transitions. [2021-11-02 22:12:58,502 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 124 transitions. Word has length 101 [2021-11-02 22:12:58,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:12:58,503 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 124 transitions. [2021-11-02 22:12:58,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2021-11-02 22:12:58,503 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 124 transitions. [2021-11-02 22:12:58,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-02 22:12:58,504 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:12:58,504 INFO L513 BasicCegarLoop]: trace histogram [24, 24, 21, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1] [2021-11-02 22:12:58,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-02 22:12:58,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:12:58,711 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:12:58,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:12:58,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1077530383, now seen corresponding path program 13 times [2021-11-02 22:12:58,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:12:58,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375933481] [2021-11-02 22:12:58,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:12:58,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:12:58,729 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:12:58,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1470652292] [2021-11-02 22:12:58,751 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:12:58,751 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:12:58,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:12:58,752 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:12:58,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-02 22:12:59,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:12:59,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-02 22:12:59,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:13:00,074 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-02 22:13:00,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:13:00,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375933481] [2021-11-02 22:13:00,074 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:13:00,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470652292] [2021-11-02 22:13:00,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470652292] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:13:00,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:13:00,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-11-02 22:13:00,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039979900] [2021-11-02 22:13:00,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-02 22:13:00,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:13:00,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-02 22:13:00,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-11-02 22:13:00,078 INFO L87 Difference]: Start difference. First operand 113 states and 124 transitions. Second operand has 28 states, 28 states have (on average 2.9642857142857144) internal successors, (83), 27 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:13:00,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:13:00,494 INFO L93 Difference]: Finished difference Result 1003 states and 1183 transitions. [2021-11-02 22:13:00,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-02 22:13:00,495 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.9642857142857144) internal successors, (83), 27 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-02 22:13:00,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:13:00,500 INFO L225 Difference]: With dead ends: 1003 [2021-11-02 22:13:00,500 INFO L226 Difference]: Without dead ends: 954 [2021-11-02 22:13:00,503 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-11-02 22:13:00,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2021-11-02 22:13:00,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 125. [2021-11-02 22:13:00,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.096774193548387) internal successors, (136), 124 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:13:00,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 136 transitions. [2021-11-02 22:13:00,520 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 136 transitions. Word has length 106 [2021-11-02 22:13:00,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:13:00,521 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 136 transitions. [2021-11-02 22:13:00,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.9642857142857144) internal successors, (83), 27 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:13:00,521 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 136 transitions. [2021-11-02 22:13:00,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-02 22:13:00,524 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:13:00,524 INFO L513 BasicCegarLoop]: trace histogram [28, 28, 25, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1] [2021-11-02 22:13:00,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-02 22:13:00,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:13:00,750 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:13:00,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:13:00,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1674589553, now seen corresponding path program 14 times [2021-11-02 22:13:00,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:13:00,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998432664] [2021-11-02 22:13:00,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:13:00,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:13:00,793 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:13:00,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [651296938] [2021-11-02 22:13:00,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:13:00,793 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:13:00,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:13:00,794 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:13:00,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-02 22:13:01,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:13:01,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:13:01,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-02 22:13:01,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:13:02,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1232 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-02 22:13:02,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:13:02,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998432664] [2021-11-02 22:13:02,401 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:13:02,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651296938] [2021-11-02 22:13:02,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651296938] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:13:02,401 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:13:02,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2021-11-02 22:13:02,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013583648] [2021-11-02 22:13:02,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-02 22:13:02,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:13:02,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-02 22:13:02,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-11-02 22:13:02,404 INFO L87 Difference]: Start difference. First operand 125 states and 136 transitions. Second operand has 32 states, 32 states have (on average 2.96875) internal successors, (95), 31 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:13:03,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:13:03,044 INFO L93 Difference]: Finished difference Result 1163 states and 1371 transitions. [2021-11-02 22:13:03,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-02 22:13:03,045 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.96875) internal successors, (95), 31 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2021-11-02 22:13:03,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:13:03,051 INFO L225 Difference]: With dead ends: 1163 [2021-11-02 22:13:03,051 INFO L226 Difference]: Without dead ends: 1114 [2021-11-02 22:13:03,052 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-11-02 22:13:03,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-11-02 22:13:03,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 137. [2021-11-02 22:13:03,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.088235294117647) internal successors, (148), 136 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:13:03,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 148 transitions. [2021-11-02 22:13:03,072 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 148 transitions. Word has length 118 [2021-11-02 22:13:03,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:13:03,072 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 148 transitions. [2021-11-02 22:13:03,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.96875) internal successors, (95), 31 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:13:03,073 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 148 transitions. [2021-11-02 22:13:03,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-02 22:13:03,074 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:13:03,074 INFO L513 BasicCegarLoop]: trace histogram [32, 32, 29, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1] [2021-11-02 22:13:03,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-02 22:13:03,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:13:03,290 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:13:03,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:13:03,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1770554895, now seen corresponding path program 15 times [2021-11-02 22:13:03,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:13:03,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433139701] [2021-11-02 22:13:03,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:13:03,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:13:03,311 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:13:03,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [184609420] [2021-11-02 22:13:03,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:13:03,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:13:03,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:13:03,314 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:13:03,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-02 22:13:04,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-02 22:13:04,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:13:04,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-02 22:13:04,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:13:04,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1590 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-11-02 22:13:04,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:13:04,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433139701] [2021-11-02 22:13:04,941 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:13:04,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184609420] [2021-11-02 22:13:04,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184609420] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:13:04,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:13:04,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-02 22:13:04,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324559201] [2021-11-02 22:13:04,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 22:13:04,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:13:04,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 22:13:04,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:13:04,944 INFO L87 Difference]: Start difference. First operand 137 states and 148 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:13:05,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:13:05,104 INFO L93 Difference]: Finished difference Result 149 states and 162 transitions. [2021-11-02 22:13:05,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 22:13:05,106 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-11-02 22:13:05,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:13:05,108 INFO L225 Difference]: With dead ends: 149 [2021-11-02 22:13:05,108 INFO L226 Difference]: Without dead ends: 147 [2021-11-02 22:13:05,108 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2021-11-02 22:13:05,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-11-02 22:13:05,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 142. [2021-11-02 22:13:05,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.0921985815602837) internal successors, (154), 141 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) [2021-11-02 22:13:05,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 154 transitions. [2021-11-02 22:13:05,126 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 154 transitions. Word has length 130 [2021-11-02 22:13:05,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:13:05,127 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 154 transitions. [2021-11-02 22:13:05,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:13:05,127 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 154 transitions. [2021-11-02 22:13:05,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-02 22:13:05,128 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:13:05,129 INFO L513 BasicCegarLoop]: trace histogram [32, 32, 29, 7, 7, 7, 6, 6, 3, 1, 1, 1, 1, 1, 1] [2021-11-02 22:13:05,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-02 22:13:05,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:13:05,351 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:13:05,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:13:05,352 INFO L85 PathProgramCache]: Analyzing trace with hash 99619377, now seen corresponding path program 16 times [2021-11-02 22:13:05,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:13:05,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314152072] [2021-11-02 22:13:05,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:13:05,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:13:05,374 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:13:05,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [850955292] [2021-11-02 22:13:05,375 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:13:05,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:13:05,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:13:05,376 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:13:05,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-02 22:13:06,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:13:06,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:13:06,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-02 22:13:06,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:13:06,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 1476 proven. 44 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-02 22:13:06,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:13:06,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314152072] [2021-11-02 22:13:06,937 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:13:06,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850955292] [2021-11-02 22:13:06,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850955292] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:13:06,938 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:13:06,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2021-11-02 22:13:06,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098432799] [2021-11-02 22:13:06,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-02 22:13:06,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:13:06,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-02 22:13:06,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=665, Unknown=0, NotChecked=0, Total=1260 [2021-11-02 22:13:06,940 INFO L87 Difference]: Start difference. First operand 142 states and 154 transitions. Second operand has 36 states, 36 states have (on average 2.9722222222222223) internal successors, (107), 36 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:13:07,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:13:07,969 INFO L93 Difference]: Finished difference Result 1247 states and 1469 transitions. [2021-11-02 22:13:07,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-02 22:13:07,970 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.9722222222222223) internal successors, (107), 36 states have internal predecessors, (107), 0 states have call successors, (0), 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 135 [2021-11-02 22:13:07,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:13:07,976 INFO L225 Difference]: With dead ends: 1247 [2021-11-02 22:13:07,976 INFO L226 Difference]: Without dead ends: 1204 [2021-11-02 22:13:07,977 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=854, Invalid=952, Unknown=0, NotChecked=0, Total=1806 [2021-11-02 22:13:07,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2021-11-02 22:13:08,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 145. [2021-11-02 22:13:08,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.0972222222222223) internal successors, (158), 144 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:13:08,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 158 transitions. [2021-11-02 22:13:08,004 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 158 transitions. Word has length 135 [2021-11-02 22:13:08,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:13:08,004 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 158 transitions. [2021-11-02 22:13:08,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.9722222222222223) internal successors, (107), 36 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:13:08,005 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 158 transitions. [2021-11-02 22:13:08,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-02 22:13:08,007 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:13:08,007 INFO L513 BasicCegarLoop]: trace histogram [33, 33, 29, 7, 7, 7, 6, 6, 4, 1, 1, 1, 1, 1, 1] [2021-11-02 22:13:08,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-02 22:13:08,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-02 22:13:08,229 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:13:08,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:13:08,230 INFO L85 PathProgramCache]: Analyzing trace with hash -274498259, now seen corresponding path program 17 times [2021-11-02 22:13:08,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:13:08,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336148218] [2021-11-02 22:13:08,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:13:08,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:13:08,254 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:13:08,255 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [207633799] [2021-11-02 22:13:08,255 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:13:08,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:13:08,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:13:08,256 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:13:08,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-02 22:13:14,051 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2021-11-02 22:13:14,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:13:14,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-02 22:13:14,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:13:15,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1716 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-02 22:13:15,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:13:15,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336148218] [2021-11-02 22:13:15,260 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:13:15,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207633799] [2021-11-02 22:13:15,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207633799] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:13:15,260 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:13:15,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2021-11-02 22:13:15,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273057858] [2021-11-02 22:13:15,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-02 22:13:15,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:13:15,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-02 22:13:15,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-11-02 22:13:15,262 INFO L87 Difference]: Start difference. First operand 145 states and 158 transitions. Second operand has 37 states, 37 states have (on average 2.972972972972973) internal successors, (110), 36 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:13:15,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:13:15,849 INFO L93 Difference]: Finished difference Result 1515 states and 1790 transitions. [2021-11-02 22:13:15,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-02 22:13:15,850 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.972972972972973) internal successors, (110), 36 states have internal predecessors, (110), 0 states have call successors, (0), 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 138 [2021-11-02 22:13:15,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:13:15,857 INFO L225 Difference]: With dead ends: 1515 [2021-11-02 22:13:15,857 INFO L226 Difference]: Without dead ends: 1458 [2021-11-02 22:13:15,858 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-11-02 22:13:15,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2021-11-02 22:13:15,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 160. [2021-11-02 22:13:15,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.0880503144654088) internal successors, (173), 159 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:13:15,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 173 transitions. [2021-11-02 22:13:15,883 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 173 transitions. Word has length 138 [2021-11-02 22:13:15,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:13:15,884 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 173 transitions. [2021-11-02 22:13:15,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.972972972972973) internal successors, (110), 36 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:13:15,884 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 173 transitions. [2021-11-02 22:13:15,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-02 22:13:15,886 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:13:15,886 INFO L513 BasicCegarLoop]: trace histogram [38, 38, 34, 7, 7, 7, 6, 6, 4, 1, 1, 1, 1, 1, 1] [2021-11-02 22:13:15,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-02 22:13:16,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-02 22:13:16,104 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:13:16,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:13:16,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1459861581, now seen corresponding path program 18 times [2021-11-02 22:13:16,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:13:16,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335172358] [2021-11-02 22:13:16,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:13:16,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:13:16,126 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:13:16,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1108531580] [2021-11-02 22:13:16,126 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:13:16,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:13:16,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:13:16,128 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:13:16,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-02 22:13:17,357 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-02 22:13:17,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:13:17,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-02 22:13:17,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:13:18,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2246 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 2147 trivial. 0 not checked. [2021-11-02 22:13:18,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:13:18,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335172358] [2021-11-02 22:13:18,203 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:13:18,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108531580] [2021-11-02 22:13:18,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108531580] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:13:18,203 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:13:18,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-02 22:13:18,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389130493] [2021-11-02 22:13:18,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 22:13:18,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:13:18,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 22:13:18,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-11-02 22:13:18,205 INFO L87 Difference]: Start difference. First operand 160 states and 173 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) 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) [2021-11-02 22:13:18,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:13:18,346 INFO L93 Difference]: Finished difference Result 172 states and 187 transitions. [2021-11-02 22:13:18,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 22:13:18,347 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) 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 153 [2021-11-02 22:13:18,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:13:18,348 INFO L225 Difference]: With dead ends: 172 [2021-11-02 22:13:18,348 INFO L226 Difference]: Without dead ends: 170 [2021-11-02 22:13:18,348 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-11-02 22:13:18,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-02 22:13:18,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 165. [2021-11-02 22:13:18,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.0914634146341464) internal successors, (179), 164 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:13:18,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 179 transitions. [2021-11-02 22:13:18,368 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 179 transitions. Word has length 153 [2021-11-02 22:13:18,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:13:18,368 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 179 transitions. [2021-11-02 22:13:18,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) 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) [2021-11-02 22:13:18,368 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 179 transitions. [2021-11-02 22:13:18,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-02 22:13:18,370 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:13:18,370 INFO L513 BasicCegarLoop]: trace histogram [38, 38, 34, 8, 8, 8, 7, 7, 4, 1, 1, 1, 1, 1, 1] [2021-11-02 22:13:18,379 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-11-02 22:13:18,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-02 22:13:18,579 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:13:18,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:13:18,580 INFO L85 PathProgramCache]: Analyzing trace with hash 40865199, now seen corresponding path program 19 times [2021-11-02 22:13:18,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:13:18,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206208733] [2021-11-02 22:13:18,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:13:18,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:13:18,607 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:13:18,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1722168291] [2021-11-02 22:13:18,608 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:13:18,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:13:18,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:13:18,616 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:13:18,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-02 22:13:19,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:13:19,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-02 22:13:19,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:13:20,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2280 backedges. 0 proven. 2147 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-11-02 22:13:20,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:13:20,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206208733] [2021-11-02 22:13:20,817 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:13:20,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722168291] [2021-11-02 22:13:20,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722168291] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:13:20,817 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:13:20,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2021-11-02 22:13:20,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378030541] [2021-11-02 22:13:20,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-02 22:13:20,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:13:20,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-02 22:13:20,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-11-02 22:13:20,821 INFO L87 Difference]: Start difference. First operand 165 states and 179 transitions. Second operand has 42 states, 42 states have (on average 2.9761904761904763) internal successors, (125), 41 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:13:21,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:13:21,733 INFO L93 Difference]: Finished difference Result 1906 states and 2254 transitions. [2021-11-02 22:13:21,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-02 22:13:21,734 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.9761904761904763) internal successors, (125), 41 states have internal predecessors, (125), 0 states have call successors, (0), 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 158 [2021-11-02 22:13:21,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:13:21,740 INFO L225 Difference]: With dead ends: 1906 [2021-11-02 22:13:21,740 INFO L226 Difference]: Without dead ends: 1844 [2021-11-02 22:13:21,741 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-11-02 22:13:21,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-11-02 22:13:21,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 180. [2021-11-02 22:13:21,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.0837988826815643) internal successors, (194), 179 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:13:21,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 194 transitions. [2021-11-02 22:13:21,771 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 194 transitions. Word has length 158 [2021-11-02 22:13:21,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:13:21,772 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 194 transitions. [2021-11-02 22:13:21,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.9761904761904763) internal successors, (125), 41 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:13:21,772 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 194 transitions. [2021-11-02 22:13:21,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-02 22:13:21,774 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:13:21,774 INFO L513 BasicCegarLoop]: trace histogram [43, 43, 39, 8, 8, 8, 7, 7, 4, 1, 1, 1, 1, 1, 1] [2021-11-02 22:13:21,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-02 22:13:22,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-02 22:13:22,002 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:13:22,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:13:22,003 INFO L85 PathProgramCache]: Analyzing trace with hash -376448715, now seen corresponding path program 20 times [2021-11-02 22:13:22,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:13:22,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696320858] [2021-11-02 22:13:22,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:13:22,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:13:22,025 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:13:22,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [706747017] [2021-11-02 22:13:22,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:13:22,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:13:22,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:13:22,027 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:13:22,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-02 22:13:23,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:13:23,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:13:23,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-02 22:13:23,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:13:24,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2885 backedges. 0 proven. 2752 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-11-02 22:13:24,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:13:24,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696320858] [2021-11-02 22:13:24,943 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:13:24,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706747017] [2021-11-02 22:13:24,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706747017] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:13:24,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:13:24,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2021-11-02 22:13:24,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144229862] [2021-11-02 22:13:24,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-02 22:13:24,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:13:24,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-02 22:13:24,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-11-02 22:13:24,946 INFO L87 Difference]: Start difference. First operand 180 states and 194 transitions. Second operand has 47 states, 47 states have (on average 2.978723404255319) internal successors, (140), 46 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:13:26,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:13:26,072 INFO L93 Difference]: Finished difference Result 2156 states and 2549 transitions. [2021-11-02 22:13:26,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-02 22:13:26,073 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.978723404255319) internal successors, (140), 46 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 173 [2021-11-02 22:13:26,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:13:26,080 INFO L225 Difference]: With dead ends: 2156 [2021-11-02 22:13:26,080 INFO L226 Difference]: Without dead ends: 2094 [2021-11-02 22:13:26,081 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-11-02 22:13:26,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2094 states. [2021-11-02 22:13:26,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2094 to 195. [2021-11-02 22:13:26,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.077319587628866) internal successors, (209), 194 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:13:26,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 209 transitions. [2021-11-02 22:13:26,116 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 209 transitions. Word has length 173 [2021-11-02 22:13:26,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:13:26,116 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 209 transitions. [2021-11-02 22:13:26,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.978723404255319) internal successors, (140), 46 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:13:26,117 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 209 transitions. [2021-11-02 22:13:26,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-02 22:13:26,119 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:13:26,119 INFO L513 BasicCegarLoop]: trace histogram [48, 48, 44, 8, 8, 8, 7, 7, 4, 1, 1, 1, 1, 1, 1] [2021-11-02 22:13:26,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-02 22:13:26,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-02 22:13:26,342 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:13:26,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:13:26,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1396027153, now seen corresponding path program 21 times [2021-11-02 22:13:26,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:13:26,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304308619] [2021-11-02 22:13:26,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:13:26,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:13:26,374 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:13:26,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1868405986] [2021-11-02 22:13:26,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:13:26,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:13:26,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:13:26,376 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:13:26,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-02 22:13:27,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-02 22:13:27,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:13:27,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-02 22:13:27,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:13:28,235 INFO L134 CoverageAnalysis]: Checked inductivity of 3565 backedges. 611 proven. 26 refuted. 0 times theorem prover too weak. 2928 trivial. 0 not checked. [2021-11-02 22:13:28,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:13:28,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304308619] [2021-11-02 22:13:28,236 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:13:28,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868405986] [2021-11-02 22:13:28,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868405986] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:13:28,236 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:13:28,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-02 22:13:28,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567321861] [2021-11-02 22:13:28,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:13:28,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:13:28,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:13:28,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:13:28,238 INFO L87 Difference]: Start difference. First operand 195 states and 209 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:13:28,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:13:28,422 INFO L93 Difference]: Finished difference Result 371 states and 418 transitions. [2021-11-02 22:13:28,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 22:13:28,423 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 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 188 [2021-11-02 22:13:28,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:13:28,425 INFO L225 Difference]: With dead ends: 371 [2021-11-02 22:13:28,425 INFO L226 Difference]: Without dead ends: 323 [2021-11-02 22:13:28,426 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:13:28,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-11-02 22:13:28,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 198. [2021-11-02 22:13:28,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.0812182741116751) internal successors, (213), 197 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:13:28,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 213 transitions. [2021-11-02 22:13:28,469 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 213 transitions. Word has length 188 [2021-11-02 22:13:28,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:13:28,469 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 213 transitions. [2021-11-02 22:13:28,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:13:28,470 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 213 transitions. [2021-11-02 22:13:28,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-11-02 22:13:28,473 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:13:28,473 INFO L513 BasicCegarLoop]: trace histogram [49, 49, 44, 8, 8, 8, 7, 7, 5, 1, 1, 1, 1, 1, 1] [2021-11-02 22:13:28,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-02 22:13:28,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:13:28,686 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:13:28,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:13:28,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1306542921, now seen corresponding path program 22 times [2021-11-02 22:13:28,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:13:28,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70889721] [2021-11-02 22:13:28,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:13:28,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:13:28,733 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:13:28,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1588199374] [2021-11-02 22:13:28,733 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:13:28,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:13:28,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:13:28,734 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:13:28,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-02 22:13:29,955 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:13:29,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:13:29,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-02 22:13:29,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:13:31,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3710 backedges. 3493 proven. 84 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-11-02 22:13:31,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:13:31,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70889721] [2021-11-02 22:13:31,674 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:13:31,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588199374] [2021-11-02 22:13:31,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588199374] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:13:31,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:13:31,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2021-11-02 22:13:31,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153935866] [2021-11-02 22:13:31,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-02 22:13:31,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:13:31,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-02 22:13:31,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1319, Invalid=1437, Unknown=0, NotChecked=0, Total=2756 [2021-11-02 22:13:31,678 INFO L87 Difference]: Start difference. First operand 198 states and 213 transitions. Second operand has 53 states, 53 states have (on average 2.981132075471698) internal successors, (158), 53 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:13:34,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:13:34,187 INFO L93 Difference]: Finished difference Result 2137 states and 2525 transitions. [2021-11-02 22:13:34,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-11-02 22:13:34,189 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.981132075471698) internal successors, (158), 53 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 191 [2021-11-02 22:13:34,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:13:34,198 INFO L225 Difference]: With dead ends: 2137 [2021-11-02 22:13:34,198 INFO L226 Difference]: Without dead ends: 2089 [2021-11-02 22:13:34,200 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2197, Invalid=2495, Unknown=0, NotChecked=0, Total=4692 [2021-11-02 22:13:34,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-11-02 22:13:34,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 201. [2021-11-02 22:13:34,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.085) internal successors, (217), 200 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:13:34,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 217 transitions. [2021-11-02 22:13:34,239 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 217 transitions. Word has length 191 [2021-11-02 22:13:34,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:13:34,240 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 217 transitions. [2021-11-02 22:13:34,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.981132075471698) internal successors, (158), 53 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:13:34,240 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 217 transitions. [2021-11-02 22:13:34,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-02 22:13:34,242 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:13:34,243 INFO L513 BasicCegarLoop]: trace histogram [50, 50, 44, 8, 8, 8, 7, 7, 6, 1, 1, 1, 1, 1, 1] [2021-11-02 22:13:34,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-02 22:13:34,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-02 22:13:34,458 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:13:34,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:13:34,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1638489071, now seen corresponding path program 23 times [2021-11-02 22:13:34,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:13:34,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597936143] [2021-11-02 22:13:34,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:13:34,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:13:34,501 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:13:34,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1960775473] [2021-11-02 22:13:34,501 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:13:34,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:13:34,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:13:34,503 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:13:34,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-02 22:16:01,330 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 51 check-sat command(s) [2021-11-02 22:16:01,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:16:01,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-02 22:16:01,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:16:03,497 INFO L134 CoverageAnalysis]: Checked inductivity of 3858 backedges. 0 proven. 3725 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-11-02 22:16:03,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:16:03,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597936143] [2021-11-02 22:16:03,497 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:16:03,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960775473] [2021-11-02 22:16:03,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960775473] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:16:03,498 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:16:03,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2021-11-02 22:16:03,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108070707] [2021-11-02 22:16:03,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-02 22:16:03,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:16:03,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-02 22:16:03,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-11-02 22:16:03,501 INFO L87 Difference]: Start difference. First operand 201 states and 217 transitions. Second operand has 54 states, 54 states have (on average 2.9814814814814814) internal successors, (161), 53 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:16:05,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:16:05,149 INFO L93 Difference]: Finished difference Result 2518 states and 2980 transitions. [2021-11-02 22:16:05,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-02 22:16:05,150 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.9814814814814814) internal successors, (161), 53 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 194 [2021-11-02 22:16:05,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:16:05,159 INFO L225 Difference]: With dead ends: 2518 [2021-11-02 22:16:05,159 INFO L226 Difference]: Without dead ends: 2450 [2021-11-02 22:16:05,160 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-11-02 22:16:05,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2450 states. [2021-11-02 22:16:05,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2450 to 222. [2021-11-02 22:16:05,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 1.0769230769230769) internal successors, (238), 221 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:16:05,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 238 transitions. [2021-11-02 22:16:05,204 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 238 transitions. Word has length 194 [2021-11-02 22:16:05,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:16:05,204 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 238 transitions. [2021-11-02 22:16:05,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.9814814814814814) internal successors, (161), 53 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:16:05,205 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 238 transitions. [2021-11-02 22:16:05,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-11-02 22:16:05,206 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:16:05,206 INFO L513 BasicCegarLoop]: trace histogram [57, 57, 51, 8, 8, 8, 7, 7, 6, 1, 1, 1, 1, 1, 1] [2021-11-02 22:16:05,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-02 22:16:05,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:16:05,434 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:16:05,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:16:05,435 INFO L85 PathProgramCache]: Analyzing trace with hash -2036172235, now seen corresponding path program 24 times [2021-11-02 22:16:05,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:16:05,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336558840] [2021-11-02 22:16:05,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:16:05,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:16:05,470 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:16:05,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [565218230] [2021-11-02 22:16:05,471 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:16:05,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:16:05,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:16:05,472 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:16:05,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-02 22:16:07,339 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-11-02 22:16:07,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:16:07,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-02 22:16:07,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:16:08,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4978 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 4845 trivial. 0 not checked. [2021-11-02 22:16:08,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:16:08,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336558840] [2021-11-02 22:16:08,537 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:16:08,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565218230] [2021-11-02 22:16:08,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565218230] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:16:08,537 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:16:08,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-11-02 22:16:08,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630123419] [2021-11-02 22:16:08,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 22:16:08,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:16:08,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 22:16:08,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:16:08,538 INFO L87 Difference]: Start difference. First operand 222 states and 238 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:16:08,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:16:08,703 INFO L93 Difference]: Finished difference Result 234 states and 252 transitions. [2021-11-02 22:16:08,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-02 22:16:08,704 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 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 215 [2021-11-02 22:16:08,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:16:08,705 INFO L225 Difference]: With dead ends: 234 [2021-11-02 22:16:08,706 INFO L226 Difference]: Without dead ends: 232 [2021-11-02 22:16:08,706 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2021-11-02 22:16:08,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-11-02 22:16:08,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 227. [2021-11-02 22:16:08,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.079646017699115) internal successors, (244), 226 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:16:08,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 244 transitions. [2021-11-02 22:16:08,730 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 244 transitions. Word has length 215 [2021-11-02 22:16:08,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:16:08,731 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 244 transitions. [2021-11-02 22:16:08,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:16:08,731 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 244 transitions. [2021-11-02 22:16:08,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-11-02 22:16:08,732 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:16:08,733 INFO L513 BasicCegarLoop]: trace histogram [57, 57, 51, 9, 9, 9, 8, 8, 6, 1, 1, 1, 1, 1, 1] [2021-11-02 22:16:08,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-02 22:16:08,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:16:08,946 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:16:08,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:16:08,946 INFO L85 PathProgramCache]: Analyzing trace with hash -324101011, now seen corresponding path program 25 times [2021-11-02 22:16:08,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:16:08,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965075753] [2021-11-02 22:16:08,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:16:08,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:16:08,977 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:16:08,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [490756461] [2021-11-02 22:16:08,978 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:16:08,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:16:08,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:16:08,979 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:16:09,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-02 22:16:10,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:16:10,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-02 22:16:10,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:16:13,285 INFO L134 CoverageAnalysis]: Checked inductivity of 5017 backedges. 0 proven. 4845 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-11-02 22:16:13,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:16:13,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965075753] [2021-11-02 22:16:13,286 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:16:13,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490756461] [2021-11-02 22:16:13,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490756461] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:16:13,286 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:16:13,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2021-11-02 22:16:13,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944130375] [2021-11-02 22:16:13,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-02 22:16:13,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:16:13,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-02 22:16:13,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2021-11-02 22:16:13,289 INFO L87 Difference]: Start difference. First operand 227 states and 244 transitions. Second operand has 61 states, 61 states have (on average 2.9836065573770494) internal successors, (182), 60 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:16:15,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:16:15,351 INFO L93 Difference]: Finished difference Result 3124 states and 3700 transitions. [2021-11-02 22:16:15,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-11-02 22:16:15,353 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.9836065573770494) internal successors, (182), 60 states have internal predecessors, (182), 0 states have call successors, (0), 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 220 [2021-11-02 22:16:15,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:16:15,368 INFO L225 Difference]: With dead ends: 3124 [2021-11-02 22:16:15,368 INFO L226 Difference]: Without dead ends: 3051 [2021-11-02 22:16:15,369 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2021-11-02 22:16:15,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3051 states. [2021-11-02 22:16:15,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3051 to 248. [2021-11-02 22:16:15,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.0728744939271255) internal successors, (265), 247 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:16:15,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 265 transitions. [2021-11-02 22:16:15,413 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 265 transitions. Word has length 220 [2021-11-02 22:16:15,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:16:15,413 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 265 transitions. [2021-11-02 22:16:15,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.9836065573770494) internal successors, (182), 60 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:16:15,414 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 265 transitions. [2021-11-02 22:16:15,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-11-02 22:16:15,415 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:16:15,416 INFO L513 BasicCegarLoop]: trace histogram [64, 64, 58, 9, 9, 9, 8, 8, 6, 1, 1, 1, 1, 1, 1] [2021-11-02 22:16:15,451 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-11-02 22:16:15,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-02 22:16:15,630 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:16:15,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:16:15,631 INFO L85 PathProgramCache]: Analyzing trace with hash -2004299981, now seen corresponding path program 26 times [2021-11-02 22:16:15,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:16:15,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976144980] [2021-11-02 22:16:15,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:16:15,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:16:15,667 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:16:15,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1910054018] [2021-11-02 22:16:15,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:16:15,668 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:16:15,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:16:15,674 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:16:15,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-02 22:16:17,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:16:17,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:16:17,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-02 22:16:17,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:16:20,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6284 backedges. 0 proven. 6112 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-11-02 22:16:20,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:16:20,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976144980] [2021-11-02 22:16:20,548 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:16:20,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910054018] [2021-11-02 22:16:20,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910054018] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:16:20,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:16:20,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2021-11-02 22:16:20,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735366073] [2021-11-02 22:16:20,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-02 22:16:20,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:16:20,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-02 22:16:20,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2021-11-02 22:16:20,553 INFO L87 Difference]: Start difference. First operand 248 states and 265 transitions. Second operand has 68 states, 68 states have (on average 2.985294117647059) internal successors, (203), 67 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:16:23,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:16:23,500 INFO L93 Difference]: Finished difference Result 3509 states and 4155 transitions. [2021-11-02 22:16:23,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-11-02 22:16:23,501 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.985294117647059) internal successors, (203), 67 states have internal predecessors, (203), 0 states have call successors, (0), 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 241 [2021-11-02 22:16:23,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:16:23,516 INFO L225 Difference]: With dead ends: 3509 [2021-11-02 22:16:23,516 INFO L226 Difference]: Without dead ends: 3436 [2021-11-02 22:16:23,518 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2021-11-02 22:16:23,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3436 states. [2021-11-02 22:16:23,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3436 to 269. [2021-11-02 22:16:23,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 1.0671641791044777) internal successors, (286), 268 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:16:23,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 286 transitions. [2021-11-02 22:16:23,592 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 286 transitions. Word has length 241 [2021-11-02 22:16:23,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:16:23,592 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 286 transitions. [2021-11-02 22:16:23,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.985294117647059) internal successors, (203), 67 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:16:23,593 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 286 transitions. [2021-11-02 22:16:23,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-11-02 22:16:23,595 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:16:23,595 INFO L513 BasicCegarLoop]: trace histogram [71, 71, 65, 9, 9, 9, 8, 8, 6, 1, 1, 1, 1, 1, 1] [2021-11-02 22:16:23,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-02 22:16:23,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-02 22:16:23,810 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:16:23,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:16:23,811 INFO L85 PathProgramCache]: Analyzing trace with hash -489671635, now seen corresponding path program 27 times [2021-11-02 22:16:23,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:16:23,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512072938] [2021-11-02 22:16:23,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:16:23,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:16:23,848 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:16:23,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [657049580] [2021-11-02 22:16:23,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:16:23,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:16:23,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:16:23,850 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:16:23,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-02 22:16:26,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-02 22:16:26,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:16:26,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-02 22:16:26,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:16:27,779 INFO L134 CoverageAnalysis]: Checked inductivity of 7698 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 7526 trivial. 0 not checked. [2021-11-02 22:16:27,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:16:27,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512072938] [2021-11-02 22:16:27,780 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:16:27,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657049580] [2021-11-02 22:16:27,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657049580] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:16:27,780 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:16:27,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-02 22:16:27,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413432660] [2021-11-02 22:16:27,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 22:16:27,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:16:27,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 22:16:27,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:16:27,782 INFO L87 Difference]: Start difference. First operand 269 states and 286 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:16:28,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:16:28,080 INFO L93 Difference]: Finished difference Result 281 states and 300 transitions. [2021-11-02 22:16:28,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-02 22:16:28,080 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 262 [2021-11-02 22:16:28,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:16:28,082 INFO L225 Difference]: With dead ends: 281 [2021-11-02 22:16:28,083 INFO L226 Difference]: Without dead ends: 279 [2021-11-02 22:16:28,083 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2021-11-02 22:16:28,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-11-02 22:16:28,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 274. [2021-11-02 22:16:28,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 1.0695970695970696) internal successors, (292), 273 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:16:28,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 292 transitions. [2021-11-02 22:16:28,135 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 292 transitions. Word has length 262 [2021-11-02 22:16:28,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:16:28,135 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 292 transitions. [2021-11-02 22:16:28,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:16:28,136 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 292 transitions. [2021-11-02 22:16:28,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-11-02 22:16:28,138 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:16:28,138 INFO L513 BasicCegarLoop]: trace histogram [71, 71, 65, 10, 10, 10, 9, 9, 6, 1, 1, 1, 1, 1, 1] [2021-11-02 22:16:28,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-02 22:16:28,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-02 22:16:28,347 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:16:28,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:16:28,347 INFO L85 PathProgramCache]: Analyzing trace with hash 2086559093, now seen corresponding path program 28 times [2021-11-02 22:16:28,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:16:28,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945018515] [2021-11-02 22:16:28,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:16:28,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:16:28,408 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:16:28,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1964760422] [2021-11-02 22:16:28,408 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:16:28,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:16:28,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:16:28,410 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:16:28,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-02 22:16:30,593 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:16:30,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:16:30,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 81 conjunts are in the unsatisfiable core [2021-11-02 22:16:30,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:16:34,215 INFO L134 CoverageAnalysis]: Checked inductivity of 7742 backedges. 7404 proven. 122 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2021-11-02 22:16:34,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:16:34,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945018515] [2021-11-02 22:16:34,216 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:16:34,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964760422] [2021-11-02 22:16:34,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964760422] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:16:34,217 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:16:34,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2021-11-02 22:16:34,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112580072] [2021-11-02 22:16:34,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-11-02 22:16:34,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:16:34,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-11-02 22:16:34,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2689, Invalid=2861, Unknown=0, NotChecked=0, Total=5550 [2021-11-02 22:16:34,222 INFO L87 Difference]: Start difference. First operand 274 states and 292 transitions. Second operand has 75 states, 75 states have (on average 2.986666666666667) internal successors, (224), 75 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:16:40,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:16:40,751 INFO L93 Difference]: Finished difference Result 3773 states and 4469 transitions. [2021-11-02 22:16:40,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-02 22:16:40,752 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.986666666666667) internal successors, (224), 75 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 267 [2021-11-02 22:16:40,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:16:40,773 INFO L225 Difference]: With dead ends: 3773 [2021-11-02 22:16:40,773 INFO L226 Difference]: Without dead ends: 3715 [2021-11-02 22:16:40,776 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=4395, Invalid=4917, Unknown=0, NotChecked=0, Total=9312 [2021-11-02 22:16:40,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3715 states. [2021-11-02 22:16:40,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3715 to 277. [2021-11-02 22:16:40,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 1.0724637681159421) internal successors, (296), 276 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:16:40,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 296 transitions. [2021-11-02 22:16:40,850 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 296 transitions. Word has length 267 [2021-11-02 22:16:40,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:16:40,851 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 296 transitions. [2021-11-02 22:16:40,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.986666666666667) internal successors, (224), 75 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:16:40,851 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 296 transitions. [2021-11-02 22:16:40,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2021-11-02 22:16:40,853 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:16:40,854 INFO L513 BasicCegarLoop]: trace histogram [72, 72, 65, 10, 10, 10, 9, 9, 7, 1, 1, 1, 1, 1, 1] [2021-11-02 22:16:40,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-02 22:16:41,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:16:41,083 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:16:41,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:16:41,083 INFO L85 PathProgramCache]: Analyzing trace with hash 452072817, now seen corresponding path program 29 times [2021-11-02 22:16:41,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:16:41,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360684591] [2021-11-02 22:16:41,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:16:41,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:16:41,142 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:16:41,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1297333307] [2021-11-02 22:16:41,142 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:16:41,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:16:41,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:16:41,144 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:16:41,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-02 22:22:55,698 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 73 check-sat command(s) [2021-11-02 22:22:55,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:22:55,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 75 conjunts are in the unsatisfiable core [2021-11-02 22:22:55,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:22:59,770 INFO L134 CoverageAnalysis]: Checked inductivity of 7956 backedges. 0 proven. 7740 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2021-11-02 22:22:59,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:22:59,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360684591] [2021-11-02 22:22:59,770 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:22:59,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297333307] [2021-11-02 22:22:59,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297333307] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:22:59,771 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:22:59,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2021-11-02 22:22:59,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668641572] [2021-11-02 22:22:59,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-11-02 22:22:59,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:22:59,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-11-02 22:22:59,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2021-11-02 22:22:59,774 INFO L87 Difference]: Start difference. First operand 277 states and 296 transitions. Second operand has 76 states, 76 states have (on average 2.986842105263158) internal successors, (227), 75 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:23:04,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:23:04,026 INFO L93 Difference]: Finished difference Result 4281 states and 5075 transitions. [2021-11-02 22:23:04,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-11-02 22:23:04,027 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.986842105263158) internal successors, (227), 75 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 270 [2021-11-02 22:23:04,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:23:04,036 INFO L225 Difference]: With dead ends: 4281 [2021-11-02 22:23:04,037 INFO L226 Difference]: Without dead ends: 4200 [2021-11-02 22:23:04,039 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2021-11-02 22:23:04,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4200 states. [2021-11-02 22:23:04,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4200 to 301. [2021-11-02 22:23:04,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 1.0666666666666667) internal successors, (320), 300 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:23:04,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 320 transitions. [2021-11-02 22:23:04,107 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 320 transitions. Word has length 270 [2021-11-02 22:23:04,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:23:04,107 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 320 transitions. [2021-11-02 22:23:04,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.986842105263158) internal successors, (227), 75 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:23:04,108 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 320 transitions. [2021-11-02 22:23:04,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2021-11-02 22:23:04,109 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:23:04,110 INFO L513 BasicCegarLoop]: trace histogram [80, 80, 73, 10, 10, 10, 9, 9, 7, 1, 1, 1, 1, 1, 1] [2021-11-02 22:23:04,239 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-11-02 22:23:04,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-02 22:23:04,310 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:23:04,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:23:04,311 INFO L85 PathProgramCache]: Analyzing trace with hash -220012943, now seen corresponding path program 30 times [2021-11-02 22:23:04,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:23:04,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130894923] [2021-11-02 22:23:04,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:23:04,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:23:04,394 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:23:04,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [197782606] [2021-11-02 22:23:04,395 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:23:04,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:23:04,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:23:04,396 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:23:04,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-02 22:23:09,564 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-11-02 22:23:09,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:23:09,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-02 22:23:09,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:23:11,398 INFO L134 CoverageAnalysis]: Checked inductivity of 9776 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 9560 trivial. 0 not checked. [2021-11-02 22:23:11,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:23:11,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130894923] [2021-11-02 22:23:11,399 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:23:11,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197782606] [2021-11-02 22:23:11,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197782606] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:23:11,399 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:23:11,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-11-02 22:23:11,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579915968] [2021-11-02 22:23:11,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-02 22:23:11,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:23:11,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-02 22:23:11,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:23:11,403 INFO L87 Difference]: Start difference. First operand 301 states and 320 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:23:11,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:23:11,717 INFO L93 Difference]: Finished difference Result 313 states and 334 transitions. [2021-11-02 22:23:11,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-02 22:23:11,718 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 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 294 [2021-11-02 22:23:11,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:23:11,719 INFO L225 Difference]: With dead ends: 313 [2021-11-02 22:23:11,719 INFO L226 Difference]: Without dead ends: 311 [2021-11-02 22:23:11,720 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2021-11-02 22:23:11,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-11-02 22:23:11,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 306. [2021-11-02 22:23:11,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 1.0688524590163935) internal successors, (326), 305 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:23:11,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 326 transitions. [2021-11-02 22:23:11,771 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 326 transitions. Word has length 294 [2021-11-02 22:23:11,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:23:11,771 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 326 transitions. [2021-11-02 22:23:11,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:23:11,771 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 326 transitions. [2021-11-02 22:23:11,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2021-11-02 22:23:11,772 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:23:11,773 INFO L513 BasicCegarLoop]: trace histogram [80, 80, 73, 11, 11, 11, 10, 10, 7, 1, 1, 1, 1, 1, 1] [2021-11-02 22:23:11,792 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-11-02 22:23:11,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:23:11,973 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:23:11,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:23:11,974 INFO L85 PathProgramCache]: Analyzing trace with hash 862944689, now seen corresponding path program 31 times [2021-11-02 22:23:11,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:23:11,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602607544] [2021-11-02 22:23:11,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:23:11,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:23:12,039 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:23:12,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [261298442] [2021-11-02 22:23:12,040 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:23:12,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:23:12,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:23:12,055 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:23:12,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-02 22:23:14,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:23:14,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 83 conjunts are in the unsatisfiable core [2021-11-02 22:23:14,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:23:18,986 INFO L134 CoverageAnalysis]: Checked inductivity of 9825 backedges. 0 proven. 9560 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2021-11-02 22:23:18,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:23:18,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602607544] [2021-11-02 22:23:18,986 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:23:18,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261298442] [2021-11-02 22:23:18,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261298442] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:23:18,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:23:18,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2021-11-02 22:23:18,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319971744] [2021-11-02 22:23:18,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-11-02 22:23:18,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:23:18,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-11-02 22:23:18,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2021-11-02 22:23:18,991 INFO L87 Difference]: Start difference. First operand 306 states and 326 transitions. Second operand has 84 states, 84 states have (on average 2.988095238095238) internal successors, (251), 83 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:23:24,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:23:24,430 INFO L93 Difference]: Finished difference Result 5122 states and 6076 transitions. [2021-11-02 22:23:24,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-11-02 22:23:24,433 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.988095238095238) internal successors, (251), 83 states have internal predecessors, (251), 0 states have call successors, (0), 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 299 [2021-11-02 22:23:24,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:23:24,441 INFO L225 Difference]: With dead ends: 5122 [2021-11-02 22:23:24,441 INFO L226 Difference]: Without dead ends: 5036 [2021-11-02 22:23:24,443 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2021-11-02 22:23:24,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5036 states. [2021-11-02 22:23:24,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5036 to 330. [2021-11-02 22:23:24,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 1.0638297872340425) internal successors, (350), 329 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:23:24,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 350 transitions. [2021-11-02 22:23:24,551 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 350 transitions. Word has length 299 [2021-11-02 22:23:24,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:23:24,551 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 350 transitions. [2021-11-02 22:23:24,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.988095238095238) internal successors, (251), 83 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:23:24,552 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 350 transitions. [2021-11-02 22:23:24,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2021-11-02 22:23:24,554 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:23:24,555 INFO L513 BasicCegarLoop]: trace histogram [88, 88, 81, 11, 11, 11, 10, 10, 7, 1, 1, 1, 1, 1, 1] [2021-11-02 22:23:24,588 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-11-02 22:23:24,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-02 22:23:24,758 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:23:24,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:23:24,758 INFO L85 PathProgramCache]: Analyzing trace with hash 876565681, now seen corresponding path program 32 times [2021-11-02 22:23:24,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:23:24,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752058202] [2021-11-02 22:23:24,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:23:24,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:23:24,810 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:23:24,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1074188416] [2021-11-02 22:23:24,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:23:24,811 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:23:24,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:23:24,812 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:23:24,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-02 22:23:27,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:23:27,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:23:27,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 91 conjunts are in the unsatisfiable core [2021-11-02 22:23:27,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:23:32,227 INFO L134 CoverageAnalysis]: Checked inductivity of 11837 backedges. 0 proven. 11572 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2021-11-02 22:23:32,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:23:32,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752058202] [2021-11-02 22:23:32,228 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:23:32,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074188416] [2021-11-02 22:23:32,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074188416] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:23:32,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:23:32,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91] total 91 [2021-11-02 22:23:32,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967064883] [2021-11-02 22:23:32,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-11-02 22:23:32,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:23:32,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-11-02 22:23:32,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2021-11-02 22:23:32,233 INFO L87 Difference]: Start difference. First operand 330 states and 350 transitions. Second operand has 92 states, 92 states have (on average 2.989130434782609) internal successors, (275), 91 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:23:39,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:23:39,502 INFO L93 Difference]: Finished difference Result 5642 states and 6692 transitions. [2021-11-02 22:23:39,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-11-02 22:23:39,503 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.989130434782609) internal successors, (275), 91 states have internal predecessors, (275), 0 states have call successors, (0), 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 323 [2021-11-02 22:23:39,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:23:39,510 INFO L225 Difference]: With dead ends: 5642 [2021-11-02 22:23:39,510 INFO L226 Difference]: Without dead ends: 5556 [2021-11-02 22:23:39,513 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2021-11-02 22:23:39,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5556 states. [2021-11-02 22:23:39,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5556 to 354. [2021-11-02 22:23:39,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 1.0594900849858357) internal successors, (374), 353 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:23:39,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 374 transitions. [2021-11-02 22:23:39,642 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 374 transitions. Word has length 323 [2021-11-02 22:23:39,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:23:39,642 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 374 transitions. [2021-11-02 22:23:39,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.989130434782609) internal successors, (275), 91 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:23:39,643 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 374 transitions. [2021-11-02 22:23:39,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2021-11-02 22:23:39,645 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:23:39,645 INFO L513 BasicCegarLoop]: trace histogram [96, 96, 89, 11, 11, 11, 10, 10, 7, 1, 1, 1, 1, 1, 1] [2021-11-02 22:23:39,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-02 22:23:39,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-02 22:23:39,858 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:23:39,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:23:39,859 INFO L85 PathProgramCache]: Analyzing trace with hash 146418609, now seen corresponding path program 33 times [2021-11-02 22:23:39,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:23:39,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641567338] [2021-11-02 22:23:39,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:23:39,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:23:39,912 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:23:39,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1375267999] [2021-11-02 22:23:39,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:23:39,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:23:39,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:23:39,913 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:23:39,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-02 22:23:43,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-02 22:23:43,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:23:43,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-02 22:23:43,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:23:45,054 INFO L134 CoverageAnalysis]: Checked inductivity of 14041 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 13776 trivial. 0 not checked. [2021-11-02 22:23:45,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:23:45,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641567338] [2021-11-02 22:23:45,055 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:23:45,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375267999] [2021-11-02 22:23:45,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375267999] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:23:45,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:23:45,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-11-02 22:23:45,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443468298] [2021-11-02 22:23:45,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 22:23:45,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:23:45,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 22:23:45,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-11-02 22:23:45,059 INFO L87 Difference]: Start difference. First operand 354 states and 374 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:23:45,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:23:45,459 INFO L93 Difference]: Finished difference Result 366 states and 388 transitions. [2021-11-02 22:23:45,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-02 22:23:45,460 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 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 347 [2021-11-02 22:23:45,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:23:45,460 INFO L225 Difference]: With dead ends: 366 [2021-11-02 22:23:45,461 INFO L226 Difference]: Without dead ends: 364 [2021-11-02 22:23:45,461 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2021-11-02 22:23:45,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-11-02 22:23:45,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 359. [2021-11-02 22:23:45,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 1.0614525139664805) internal successors, (380), 358 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:23:45,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 380 transitions. [2021-11-02 22:23:45,541 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 380 transitions. Word has length 347 [2021-11-02 22:23:45,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:23:45,542 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 380 transitions. [2021-11-02 22:23:45,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:23:45,543 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 380 transitions. [2021-11-02 22:23:45,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2021-11-02 22:23:45,545 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:23:45,545 INFO L513 BasicCegarLoop]: trace histogram [96, 96, 89, 12, 12, 12, 11, 11, 7, 1, 1, 1, 1, 1, 1] [2021-11-02 22:23:45,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-02 22:23:45,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-02 22:23:45,758 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:23:45,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:23:45,759 INFO L85 PathProgramCache]: Analyzing trace with hash -27887503, now seen corresponding path program 34 times [2021-11-02 22:23:45,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:23:45,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961991282] [2021-11-02 22:23:45,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:23:45,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:23:45,815 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:23:45,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2047005884] [2021-11-02 22:23:45,816 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:23:45,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:23:45,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:23:45,817 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:23:45,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-02 22:23:48,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:23:48,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:23:48,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 107 conjunts are in the unsatisfiable core [2021-11-02 22:23:48,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:23:54,693 INFO L134 CoverageAnalysis]: Checked inductivity of 14095 backedges. 13610 proven. 166 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2021-11-02 22:23:54,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:23:54,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961991282] [2021-11-02 22:23:54,693 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 22:23:54,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047005884] [2021-11-02 22:23:54,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047005884] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:23:54,694 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:23:54,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100] total 100 [2021-11-02 22:23:54,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677438917] [2021-11-02 22:23:54,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2021-11-02 22:23:54,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:23:54,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-11-02 22:23:54,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4833, Invalid=5067, Unknown=0, NotChecked=0, Total=9900 [2021-11-02 22:23:54,698 INFO L87 Difference]: Start difference. First operand 359 states and 380 transitions. Second operand has 100 states, 100 states have (on average 2.99) internal successors, (299), 100 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:24:09,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:24:09,332 INFO L93 Difference]: Finished difference Result 6022 states and 7146 transitions. [2021-11-02 22:24:09,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2021-11-02 22:24:09,333 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.99) internal successors, (299), 100 states have internal predecessors, (299), 0 states have call successors, (0), 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 352 [2021-11-02 22:24:09,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:24:09,350 INFO L225 Difference]: With dead ends: 6022 [2021-11-02 22:24:09,350 INFO L226 Difference]: Without dead ends: 5954 [2021-11-02 22:24:09,353 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=7831, Invalid=8681, Unknown=0, NotChecked=0, Total=16512 [2021-11-02 22:24:09,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5954 states. [2021-11-02 22:24:09,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5954 to 362. [2021-11-02 22:24:09,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 1.0637119113573408) internal successors, (384), 361 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:24:09,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 384 transitions. [2021-11-02 22:24:09,495 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 384 transitions. Word has length 352 [2021-11-02 22:24:09,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:24:09,495 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 384 transitions. [2021-11-02 22:24:09,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.99) internal successors, (299), 100 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:24:09,496 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 384 transitions. [2021-11-02 22:24:09,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2021-11-02 22:24:09,498 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:24:09,498 INFO L513 BasicCegarLoop]: trace histogram [97, 97, 89, 12, 12, 12, 11, 11, 8, 1, 1, 1, 1, 1, 1] [2021-11-02 22:24:09,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-02 22:24:09,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:24:09,722 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:24:09,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:24:09,723 INFO L85 PathProgramCache]: Analyzing trace with hash -675970059, now seen corresponding path program 35 times [2021-11-02 22:24:09,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:24:09,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395537300] [2021-11-02 22:24:09,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:24:09,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:24:09,776 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 22:24:09,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [717700185] [2021-11-02 22:24:09,777 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:24:09,777 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:24:09,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:24:09,778 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:24:09,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbd10ef7-7d1b-45b6-bc0d-523893562e13/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process